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Optimal Design of Single-Layer and Multi-Layer Air-Core Inductors Considering Uncertainty Factors (2023)
Journal Article
Wan, L., Khilnani, A. D., Wu, X., Liu, X., Pignari, S. A., Thomas, D. W., …Grassi, F. (2023). Optimal Design of Single-Layer and Multi-Layer Air-Core Inductors Considering Uncertainty Factors. IEEE Access, 11, 134460 -134472. https://doi.org/10.1109/access.2023.3336572

Air-core inductors are key components in power converters and measurement equipment. To optimally design inductors, their self-resonant frequency (SRF) as a result of inherent stray capacitance should be accurately estimated. This paper presents opti... Read More about Optimal Design of Single-Layer and Multi-Layer Air-Core Inductors Considering Uncertainty Factors.

Control of 7-phase permanent magnet synchronous motor drive post three failures (2023)
Journal Article
Saleh, K., & Sumner, M. (2023). Control of 7-phase permanent magnet synchronous motor drive post three failures. International Journal of Electrical and Computer Engineering, 13(5), 5006-5025. https://doi.org/10.11591/ijece.v13i5.pp5006-5025

The article is introducing a new control technique for the 7-phase permanent magnet synchronous motor (PMSM) drive to enhance its robustness against the failure of phases 'a' and 'c' in addition to the failure of the encoder occurring simultaneously.... Read More about Control of 7-phase permanent magnet synchronous motor drive post three failures.

Advanced multimodal fusion method for very short-term solar irradiance forecasting using sky images and meteorological data: A gate and transformer mechanism approach (2023)
Journal Article
Zhang, L., Wilson, R., Sumner, M., & Wu, Y. (2023). Advanced multimodal fusion method for very short-term solar irradiance forecasting using sky images and meteorological data: A gate and transformer mechanism approach. Renewable Energy, 216, Article 118952. https://doi.org/10.1016/j.renene.2023.118952

Cloud dynamics are the main factor influencing the intermittent variability of short-term solar irradiance, and therefore affect the solar farm output. Sky images have been widely used for short-term solar irradiance prediction with encouraging resul... Read More about Advanced multimodal fusion method for very short-term solar irradiance forecasting using sky images and meteorological data: A gate and transformer mechanism approach.

An investigation into the robustness of a double-ended wideband impedance-based fault location technique. (2023)
Journal Article
Jahanger, H. K., Thomas, D. W. P., & Sumner, M. (2023). An investigation into the robustness of a double-ended wideband impedance-based fault location technique. Scientific Reports, 13(1), Article 10001. https://doi.org/10.1038/s41598-023-36541-2

The double-ended impedance-based fault location technique (DEFLT) uses the wideband frequency content of the transient generated by the fault to determine the impedance from the point of measurement to the fault. This paper evaluates and develops the... Read More about An investigation into the robustness of a double-ended wideband impedance-based fault location technique..

Dynamic Analysis, Stability and Design of Grid Forming Converters With PI-Based Voltage Control in DC and 3-Phase AC Microgrids (2023)
Journal Article
Navarro-Rodríguez, Á., García, P., Cano, J. M., & Sumner, M. (2023). Dynamic Analysis, Stability and Design of Grid Forming Converters With PI-Based Voltage Control in DC and 3-Phase AC Microgrids. IEEE Transactions on Energy Conversion, 38(4), 2249-2262. https://doi.org/10.1109/TEC.2023.3280977

This paper analyzes the dynamic behavior of the voltage control loop based on proportional-integral regulators, commonly used for grid-forming converters in 3-phase AC and DC Microgrids and applications that involve a DC-link voltage control. The pap... Read More about Dynamic Analysis, Stability and Design of Grid Forming Converters With PI-Based Voltage Control in DC and 3-Phase AC Microgrids.

On Spread Spectrum for DC Grids: Low-Frequency Conducted EMI Mitigation and Signal Integrity Disruption in Serial Communication Links (2023)
Journal Article
Pena-Quintal, A., Sayed, W. E., Sumner, M., Ercan, S. U., Greedy, S., Thomas, D., & Smolenski, R. (2023). On Spread Spectrum for DC Grids: Low-Frequency Conducted EMI Mitigation and Signal Integrity Disruption in Serial Communication Links. IEEE Transactions on Electromagnetic Compatibility, 65(4), 1027-1036. https://doi.org/10.1109/TEMC.2023.3273111

This article addresses the effects on nearby communication systems when spread spectrum modulation techniques are used for a dc-dc power converter. These interactions can be found in modern smart grids and automotive power networks in which the combi... Read More about On Spread Spectrum for DC Grids: Low-Frequency Conducted EMI Mitigation and Signal Integrity Disruption in Serial Communication Links.

Multi-dimension SVPWM-based sensorless control of 7-phase PMSM drives (2023)
Journal Article
Saleh, K., & Sumner, M. (2023). Multi-dimension SVPWM-based sensorless control of 7-phase PMSM drives. Bulletin of Electrical Engineering and Informatics, 12(2), 689-703. https://doi.org/10.11591/eei.v12i2.4665

A new control technique for the 7-phase permanent magnet synchronous machine (PMSM) when a failure in the speed sensor is introduced. This will make the whole drive system more robust and at the same time reduce the cost. The speed and the position o... Read More about Multi-dimension SVPWM-based sensorless control of 7-phase PMSM drives.

Distributed predictive secondary control with soft constraints for optimal dispatch in hybrid AC/DC microgrids (2023)
Journal Article
Navas-Fonseca, A., Burgos-Mellado, C., Gómez, J. S., Espina, E., Llanos, J., Śaez, D., …Olivares, D. E. (2023). Distributed predictive secondary control with soft constraints for optimal dispatch in hybrid AC/DC microgrids. IEEE Transactions on Smart Grid, 14(6), 4204-4218. https://doi.org/10.1109/tsg.2023.3261569

Hybrid AC/DC microgrids (H-MGs) are a prominent solution for integrating distributed generation and modern AC and DC loads. However, controlling these systems is challenging as multiple electrical variables need to be controlled and coordinated. To p... Read More about Distributed predictive secondary control with soft constraints for optimal dispatch in hybrid AC/DC microgrids.

Fundamental PWM Excitation Based Rotor Position Estimation for a Dual Three-Phase Permanent Magnet Synchronous Machine (2022)
Journal Article
Chen, H., Gao, Q., Yang, T., & Sumner, M. (2023). Fundamental PWM Excitation Based Rotor Position Estimation for a Dual Three-Phase Permanent Magnet Synchronous Machine. IEEE Journal of Emerging and Selected Topics in Industrial Electronics, 4(2), 659-668. https://doi.org/10.1109/jestie.2022.3223880

Two rotor position estimation methods for a dual three-phase (DTP) permanent magnet synchronous machine (PMSM) are investigated in this paper, where the rotor position is estimated by exploiting the saliency of the motor through the phase current der... Read More about Fundamental PWM Excitation Based Rotor Position Estimation for a Dual Three-Phase Permanent Magnet Synchronous Machine.

Impact of Pseudo-Random Modulation on Measured Conducted EMI (2022)
Journal Article
Pena-Quintal, A., Loschi, H., Smolenski, R., Sumner, M., Thomas, D., Greedy, S., …Leferink, F. (2022). Impact of Pseudo-Random Modulation on Measured Conducted EMI. IEEE Electromagnetic Compatibility Magazine, 11(2), 84-92. https://doi.org/10.1109/memc.2022.9873829

This paper demonstrates that using conventional frequency scanning methods for the evaluation of conducted electromagnetic interference generated by DC/DC converters can give misleading results when pseudo-random modulation is used as part of the con... Read More about Impact of Pseudo-Random Modulation on Measured Conducted EMI.

Sensorless Control of a PMSM Drive Post an Open Circuit Failure Based on 3D‐SVPWM Technique (2022)
Journal Article
Saleh, K., & Sumner, M. (2022). Sensorless Control of a PMSM Drive Post an Open Circuit Failure Based on 3D‐SVPWM Technique. IEEJ Transactions on Electrical and Electronic Engineering, 17(7), 1072-1082. https://doi.org/10.1002/tee.23597

This paper presents a novel technique to maintain the PMSM Drive operation post the failure in one phase and the failure of the speed sensor occur simultaneously. The PMSM motor is driven by a fault-tolerant inverter. The use of the fault-tolerant in... Read More about Sensorless Control of a PMSM Drive Post an Open Circuit Failure Based on 3D‐SVPWM Technique.

Sensorless control of five-phase PMSM drives post the failure in two phases (2022)
Journal Article
Saleh, K., & Sumner, M. (2022). Sensorless control of five-phase PMSM drives post the failure in two phases. Electrical Engineering, https://doi.org/10.1007/s00202-022-01534-3

This paper introduces a novel technique to maintain the operation of the five-phase permanent magnet synchronous motor post the failure in two phases of the motor and post the failure of the speed sensor occurs simultaneously. To achieve that, firstl... Read More about Sensorless control of five-phase PMSM drives post the failure in two phases.

Distributed Model-based Predictive Secondary Control for Hybrid AC/DC Microgrids (2022)
Journal Article
Rute-Luengo, E., Navas-Fonseca, A., Gomez, J. S., Espina, E., Burgos-Mellado, C., Saez, D., …Munoz-Carpintero, D. (2022). Distributed Model-based Predictive Secondary Control for Hybrid AC/DC Microgrids. IEEE Journal of Emerging and Selected Topics in Power Electronics, 1-16. https://doi.org/10.1109/jestpe.2022.3157979

This paper presents a novel scheme based on distributed model-based predictive control for the secondary level control of hybrid AC/DC microgrids. Prediction models based on droop control and power transfer equations are proposed to characterize the... Read More about Distributed Model-based Predictive Secondary Control for Hybrid AC/DC Microgrids.

A Novel Multiport DC-DC Converter for Enhancing the Design and Performance of Battery–Supercapacitor Hybrid Energy Storage Systems for Unmanned Aerial Vehicles (2022)
Journal Article
Fares, A. M., Klumpner, C., & Sumner, M. (2022). A Novel Multiport DC-DC Converter for Enhancing the Design and Performance of Battery–Supercapacitor Hybrid Energy Storage Systems for Unmanned Aerial Vehicles. Applied Sciences, 12(6), Article 2767. https://doi.org/10.3390/app12062767

This paper proposes an integrated multiport non-isolated DC–DC converter system for integrating battery–supercapacitor hybrid energy storage with photovoltaics for solar-powered unmanned aerial vehicles applications. Compared to the traditional topol... Read More about A Novel Multiport DC-DC Converter for Enhancing the Design and Performance of Battery–Supercapacitor Hybrid Energy Storage Systems for Unmanned Aerial Vehicles.

Sensorless Control of Seven-Phase PMSM Drives Using NSV-SVPWM with Minimum Current Distortion (2022)
Journal Article
Saleh, K., & Sumner, M. (2022). Sensorless Control of Seven-Phase PMSM Drives Using NSV-SVPWM with Minimum Current Distortion. Electronics, 11(5), Article 792. https://doi.org/10.3390/electronics11050792

This paper introduces three different algorithms to track the saliency in the seven-phase PMSM to obtain sensorless speed control. These algorithms are based on measuring the amount of change of the stator currents when different active vectors are i... Read More about Sensorless Control of Seven-Phase PMSM Drives Using NSV-SVPWM with Minimum Current Distortion.

Socio-Economic Benefits in Community Energy Structures (2022)
Journal Article
Kiamba, L., Rodrigues, L., Marsh, J., Naghiyev, E., Sumner, M., Empringham, L., …Gillott, M. (2022). Socio-Economic Benefits in Community Energy Structures. Sustainability, 14(3), Article 1890. https://doi.org/10.3390/su14031890

In this paper, the authors examine how a community energy group in the Meadows area of Nottingham in the UK adopted a model of local energy generation and storage as a means of combatting climate change, improving energy efficiency, enhancing energy... Read More about Socio-Economic Benefits in Community Energy Structures.

New SVPWM used post a two-phase failure in FOC five-phase PMSM drives (2022)
Journal Article
Saleh, K., & Sumner, M. (2023). New SVPWM used post a two-phase failure in FOC five-phase PMSM drives. International Journal of Electronics, 110(2), 312-340. https://doi.org/10.1080/00207217.2021.2025448

One of the pronounced features of the multi-phase machines compared to the conventional three-phases machine is their high-fault capability. This merit is quite important as it contributes to minimising the number of interruptions in industrial opera... Read More about New SVPWM used post a two-phase failure in FOC five-phase PMSM drives.

Techno-economic and environmental analysis of community energy management for peak shaving (2021)
Journal Article
Cossutta, M., Pholboon, S., McKechnie, J., & Sumner, M. (2022). Techno-economic and environmental analysis of community energy management for peak shaving. Energy Conversion and Management, 251, Article 114900. https://doi.org/10.1016/j.enconman.2021.114900

Energy storage (ES) is seen as the key to unlocking the true potential of renewable generation as it potentially supports their integration into the grid by providing capability for services such balancing and frequency regulation. It also has the po... Read More about Techno-economic and environmental analysis of community energy management for peak shaving.

Distributed Predictive Secondary Control for Imbalance Sharing in AC Microgrids (2021)
Journal Article
Navas-Fonseca, A., Burgos-Mellado, C., Gomez, J. S., Donoso, F., Tarisciotti, L., Saez, D., …Sumner, M. (2022). Distributed Predictive Secondary Control for Imbalance Sharing in AC Microgrids. IEEE Transactions on Smart Grid, 13(1), 20-37. https://doi.org/10.1109/TSG.2021.3108677

This paper proposes a distributed predictive secondary control strategy to share imbalance in three-phase, three-wire isolated AC Microgrids. The control is based on a novel approach where the imbalance sharing among distributed generators is control... Read More about Distributed Predictive Secondary Control for Imbalance Sharing in AC Microgrids.

Distributed Predictive Control Strategy for Frequency Restoration of Microgrids Considering Optimal Dispatch (2021)
Journal Article
F., A. N., Gomez, J. S., Llanos, J., Rute, E., Saez, D., & Sumner, M. (2021). Distributed Predictive Control Strategy for Frequency Restoration of Microgrids Considering Optimal Dispatch. IEEE Transactions on Smart Grid, 12(4), 2748-2759. https://doi.org/10.1109/tsg.2021.3053092

Microgrids are the cornerstone for a new model of electrical generation based on renewable resources. Commonly microgrids are controlled with a centralised hierarchical structure, which is inherited from power systems. However, a time-scale separatio... Read More about Distributed Predictive Control Strategy for Frequency Restoration of Microgrids Considering Optimal Dispatch.

Sensorless Speed Control of a Fault-Tolerant Five-Phase PMSM Drives (2020)
Journal Article
Saleh, K., & Sumner, M. (2020). Sensorless Speed Control of a Fault-Tolerant Five-Phase PMSM Drives. Electric Power Components and Systems, 48(9-10), 919-932. https://doi.org/10.1080/15325008.2020.1825555

This paper introduces a novel method to achieve sensorless speed control of a Five-phase Permanent Magnet Synchronous Motor (PMSM) drive in case of a single-phase open-circuit fault regardless which phase is open. The motor performance when an open c... Read More about Sensorless Speed Control of a Fault-Tolerant Five-Phase PMSM Drives.

Single-phase consensus-based control for regulating voltage and sharing unbalanced currents in 3-wire isolated AC microgrids (2020)
Journal Article
Burgos-Mellado, C., Llanos, J., Espina, E., Saez, D., Cardenas, R., Sumner, M., & Watson, A. (2020). Single-phase consensus-based control for regulating voltage and sharing unbalanced currents in 3-wire isolated AC microgrids. IEEE Access, 8, 164882-164898. https://doi.org/10.1109/ACCESS.2020.3022488

A distributed control strategy is proposed to share unbalanced currents in three-phase threewire isolated AC Microgrids (MGs). It is based on a novel approach where, rather than analysing the MG as a three-phase system, it is analysed as three single... Read More about Single-phase consensus-based control for regulating voltage and sharing unbalanced currents in 3-wire isolated AC microgrids.

A 3D-space vector modulation-based sensorless speed control of a fault-tolerant PMSMs fed by 27-level inverter (2020)
Journal Article
Saleh, K., & Sumner, M. (2020). A 3D-space vector modulation-based sensorless speed control of a fault-tolerant PMSMs fed by 27-level inverter. International Journal of Electronics, 108(5), 1-21. https://doi.org/10.1080/00207217.2020.1793415

This paper exhibits a novel technique to obtain a sensorless control of a permanent magnet synchronous motor post an open-circuit fault condition to achieve a maximum reliability of the whole drive system. The contribution of this work can be express... Read More about A 3D-space vector modulation-based sensorless speed control of a fault-tolerant PMSMs fed by 27-level inverter.

Performance Assessment of an Energy Management System for a Home Microgrid with PV Generation (2020)
Journal Article
Elkazaz, M., Sumner, M., Pholboon, S., Davies, R., & Thomas, D. (2020). Performance Assessment of an Energy Management System for a Home Microgrid with PV Generation. Energies, 13(13), https://doi.org/10.3390/en13133436

Home energy management systems (HEMS) are a key technology for managing future electricity distribution systems as they can shift household electricity usage away from peak consumption times and can reduce the amount of local generation penetrating i... Read More about Performance Assessment of an Energy Management System for a Home Microgrid with PV Generation.

A hierarchical two-stage energy management for a home microgrid using model predictive and real-time controllers (2020)
Journal Article
Elkazaz, M., Sumner, M., Naghiyev, E., Pholboon, S., Davies, R., & Thomas, D. (2020). A hierarchical two-stage energy management for a home microgrid using model predictive and real-time controllers. Applied Energy, 269, https://doi.org/10.1016/j.apenergy.2020.115118

This paper presents a hierarchical two-layer home energy management system to reduce daily household energy costs and maximize photovoltaic self-consumption. The upper layer comprises a model predictive controller which optimizes household energy usa... Read More about A hierarchical two-stage energy management for a home microgrid using model predictive and real-time controllers.

A Fault Location Scheme for Active Untransposed Distribution Systems Using a Limited Number of Synchronized Measurements (2020)
Journal Article
Aboshady, F., Thomas, D., & Sumner, M. (2020). A Fault Location Scheme for Active Untransposed Distribution Systems Using a Limited Number of Synchronized Measurements. Electric Power Components and Systems, 48(1-2), 1-11. https://doi.org/10.1080/15325008.2020.1731880

This paper presents a fault location scheme for unbalanced and untransposed distribution systems which contain different types of distributed generation (DG). A general formula has been derived for any fault type using a limited number of synchronize... Read More about A Fault Location Scheme for Active Untransposed Distribution Systems Using a Limited Number of Synchronized Measurements.

Fault Ride-Through Power Electronic Topologies for Hybrid Energy Storage Systems (2020)
Journal Article
Georgious, R., Garcia, J., Sumner, M., Saeed, S., & Garcia, P. (2020). Fault Ride-Through Power Electronic Topologies for Hybrid Energy Storage Systems. Energies, 13(1), https://doi.org/10.3390/en13010257

This work presents a fault ride-through control scheme for a non-isolated power topology used in a hybrid energy storage system designed for DC microgrids. The hybrid system is formed by a lithium-ion battery bank and a supercapacitor module, both co... Read More about Fault Ride-Through Power Electronic Topologies for Hybrid Energy Storage Systems.

Hierarchical Energy Management System for Microgrid Operation Based on Robust Model Predictive Control (2019)
Journal Article
Núñez, A., Marín, L. G., Sáez, D., Sumner, M., Pholboon, S., Muñoz-Carpintero, D., & Köbrich, D. (2019). Hierarchical Energy Management System for Microgrid Operation Based on Robust Model Predictive Control. Energies, 12(23), Article 4453. https://doi.org/10.3390/en12234453

© 2019 by the authors. This paper presents a two-level hierarchical energy management system (EMS) for microgrid operation that is based on a robust model predictive control (MPC) strategy. This EMS focuses on minimizing the cost of the energy drawn... Read More about Hierarchical Energy Management System for Microgrid Operation Based on Robust Model Predictive Control.

A Wideband Single End Fault Location Scheme for Active Untransposed Distribution Systems (2019)
Journal Article
Aboshady, F., Thomas, D., & Sumner, M. (2020). A Wideband Single End Fault Location Scheme for Active Untransposed Distribution Systems. IEEE Transactions on Smart Grid, 11(3), 2115 - 2124. https://doi.org/10.1109/TSG.2019.2947870

This paper presents a single end fault location scheme for distribution networks with distributed generation (DG). The high frequency transients generated when a fault occurs are used to locate the fault point. An equivalent circuit at high frequenci... Read More about A Wideband Single End Fault Location Scheme for Active Untransposed Distribution Systems.

A Novel Modular Multiport Converter for Enhancing the Performance of Photovoltaic-Battery Based Power Systems (2019)
Journal Article
Fares, A. M., Klumpner, C., & Sumner, M. (2019). A Novel Modular Multiport Converter for Enhancing the Performance of Photovoltaic-Battery Based Power Systems. Applied Sciences, 9(19), https://doi.org/10.3390/app9193948

This paper introduces a novel multiport power converter with modular architecture for photovoltaic (PV)-battery based power systems. Compared to conventional centralized multiport converters, the proposed converter significantly improves the utilizat... Read More about A Novel Modular Multiport Converter for Enhancing the Performance of Photovoltaic-Battery Based Power Systems.

Distributed Control Strategy Based on a Consensus Algorithm and on the Conservative Power Theory for Imbalance and Harmonic Sharing in 4-Wire Microgrids (2019)
Journal Article
Burgos-Mellado, C., Llanos, J., Cardenas, R., Saez, D., Olivares, D. E., Sumner, M., & Costabeber, A. (2020). Distributed Control Strategy Based on a Consensus Algorithm and on the Conservative Power Theory for Imbalance and Harmonic Sharing in 4-Wire Microgrids. IEEE Transactions on Smart Grid, 11(2), 1604 -1619. https://doi.org/10.1109/tsg.2019.2941117

A distributed control system is proposed which uses the Conservative Power Theory (CPT) and a consensus algorithm to share imbalance and harmonics between different converters in three-phase four-wire droop-controlled Microgrids (MGs). The CPT is use... Read More about Distributed Control Strategy Based on a Consensus Algorithm and on the Conservative Power Theory for Imbalance and Harmonic Sharing in 4-Wire Microgrids.

Energy management system for hybrid PV-wind-battery microgrid using convex programming, model predictive and rolling horizon predictive control with experimental validation (2019)
Journal Article
Elkazaz, M., Sumner, M., & Thomas, D. (2020). Energy management system for hybrid PV-wind-battery microgrid using convex programming, model predictive and rolling horizon predictive control with experimental validation. International Journal of Electrical Power and Energy Systems, 115, Article 105483. https://doi.org/10.1016/j.ijepes.2019.105483

The integration of energy storage technologies with renewable energy systems can significantly reduce the operating costs for microgrids (MG) in future electricity networks. This paper presents a novel energy management system (EMS) which can minimiz... Read More about Energy management system for hybrid PV-wind-battery microgrid using convex programming, model predictive and rolling horizon predictive control with experimental validation.

Real-Time Energy Management for a Small Scale PV-Battery Microgrid: Modeling, Design, and Experimental Verification (2019)
Journal Article
Elkazaz, M., Sumner, M., & Thomas, D. (2019). Real-Time Energy Management for a Small Scale PV-Battery Microgrid: Modeling, Design, and Experimental Verification. Energies, 12(14), 1-16. https://doi.org/10.3390/en12142712

A new energy management system (EMS) is presented for small scale microgrids (MGs). The proposed EMS focuses on minimizing the daily cost of the energy drawn by the MG from the main electrical grid and increasing the self-consumption of local renewab... Read More about Real-Time Energy Management for a Small Scale PV-Battery Microgrid: Modeling, Design, and Experimental Verification.

A New Single End Wideband Impedance Based Fault Location Scheme for Distribution Systems (2019)
Journal Article
Aboshady, F. M., Thomas, D. W. P., & Sumner, M. (2019). A New Single End Wideband Impedance Based Fault Location Scheme for Distribution Systems. Electric Power Systems Research, 173, 263-270. https://doi.org/10.1016/j.epsr.2019.04.034

This paper proposes an improved impedance based fault location scheme based on system analysis at non-fundamental frequencies. The fault is treated as a voltage source that injects high frequency components into the system and the analysis is carried... Read More about A New Single End Wideband Impedance Based Fault Location Scheme for Distribution Systems.

Small-Signal Modelling and Stability Assessment of Phase-Locked Loops in Weak Grids (2019)
Journal Article
Burgos-Mellado, C., Costabeber, A., Sumner, M., Cárdenas-Dobson, R., & Sáez, D. (2019). Small-Signal Modelling and Stability Assessment of Phase-Locked Loops in Weak Grids. Energies, 12(7), 1227. https://doi.org/10.3390/en12071227

This paper proposes a low-complexity small signal model for a 3-leg converter connected to a balanced three-phase, three-wire weak grid and synchronised to this grid using a PLL implemented in a synchronous rotating d-q axis. A thorough analysis of t... Read More about Small-Signal Modelling and Stability Assessment of Phase-Locked Loops in Weak Grids.

Influence of inverter-interfaced renewable energy generators on directional relay and an improved scheme (2019)
Journal Article
Jia, K., Zhe, Y., Fang, Y., Bi, T., & Sumner, M. (2019). Influence of inverter-interfaced renewable energy generators on directional relay and an improved scheme. IEEE Transactions on Power Electronics, 34(12), 11843-11855. https://doi.org/10.1109/tpel.2019.2904715

Renewable energy sources (RESs) are typically interfaced to the grid using power electronics which can cause their fault current characteristics to display significant low frequency harmonics and unbalanced sequence impedances. Such current character... Read More about Influence of inverter-interfaced renewable energy generators on directional relay and an improved scheme.

A System Design for Distributed Energy Generation in Low-Temperature District Heating (LTDH) Networks (2019)
Journal Article
Jones, S. R., Gillott, M., Boukhanouf, R., Walker, G., Tunzi, M., Tetlow, D., …Sumner, M. (2019). A System Design for Distributed Energy Generation in Low-Temperature District Heating (LTDH) Networks. Future Cities and Environment, 5(1), Article 2. https://doi.org/10.5334/fce.44

Project SCENIC (Smart Controlled Energy Networks Integrated in Communities) involves connecting properties at the University of Nottingham’s Creative Energy Homes site in a community scale, integrated heat and power network. The system will use distr... Read More about A System Design for Distributed Energy Generation in Low-Temperature District Heating (LTDH) Networks.

Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs (2019)
Journal Article
Fares, A. M., Klumpner, C., & Sumner, M. (2019). Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs. Journal of Engineering, 2019(17), 3862-3866. https://doi.org/10.1049/joe.2018.8228

The overall performance of battery packs may be affected by imbalances between the series connected cells which is more likely in packs with high number of cells needed to provide a high voltage as needed for example in electric vehicles. In this cas... Read More about Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs.

Sizing guidelines for grid-connected decentralised energy storage systems: single house application (2019)
Journal Article
Panagiotou, K., Klumpner, C., & Sumner, M. (2019). Sizing guidelines for grid-connected decentralised energy storage systems: single house application. Journal of Engineering, 2019(17), 3802-3806. https://doi.org/10.1049/joe.2018.8155

Nowadays, the existing hierarchical, centrally controlled power grid faces new challenges due to the increase penetration of renewable sources, the need of implementing demand-side management and the 2020 and 2050 environmental targets. A promising c... Read More about Sizing guidelines for grid-connected decentralised energy storage systems: single house application.

Sensorless Control of a Fault-tolerant Multi-level PMSM Drive (2018)
Journal Article
Saleh, K., & Sumner, M. (2018). Sensorless Control of a Fault-tolerant Multi-level PMSM Drive. TELKOMNIKA (Telecommunication, Computing, Electronics and Control), 16(6), 2930-2942

This paper presents a new technique to track the saliency position in a permanent magnet synchronous motor (PMSM) post a single phase open-circuit fault. The PMSM is driven by a fault-tolerant multi-level inverter that is utilized to implement a faul... Read More about Sensorless Control of a Fault-tolerant Multi-level PMSM Drive.

A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems (2018)
Journal Article
Burgos-Mellado, C., Cardenas-Dobson, R., Saez, D., Costabeber, A., & Sumner, M. (2019). A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems. IEEE Transactions on Power Electronics, 34(6), 5325-5339. https://doi.org/10.1109/tpel.2018.2869866

© 1986-2012 IEEE. A cooperative control scheme based on the conservative power theory (CPT) is proposed, which can share imbalances in three-phase four-wire droop-controlled systems. By utilizing the CPT, the balanced, unbalanced, and distorted compo... Read More about A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems.

A DC-DC boost converter with a wide input range and high voltage gain for fuel cell vehicles (2018)
Journal Article
Zhang, Y., Liu, H., Li, J., Sumner, M., & Xia, C. (2018). A DC-DC boost converter with a wide input range and high voltage gain for fuel cell vehicles. IEEE Transactions on Power Electronics, 34(5), 4100-4111. https://doi.org/10.1109/tpel.2018.2858443

In fuel cell vehicles, the output voltage of the fuel cell source is typically much lower than the voltage required by the DC bus and also this output voltage drops significantly as the output current increases. In order to match the output voltage o... Read More about A DC-DC boost converter with a wide input range and high voltage gain for fuel cell vehicles.

Influence of an inverter based DG on a double-ended fault location scheme (2018)
Journal Article
Jahangar, H., Thomas, D. W., Sumner, M., & Rose, C. J. (2018). Influence of an inverter based DG on a double-ended fault location scheme. Journal of Engineering, 2018(15), 1078–1083. https://doi.org/10.1049/joe.2018.0261

This paper describes the influence of Distributed Generation (DG) on a double ended fault location based on measuring the high frequency fault transients. The additional non-fundamental frequency current components from DG will influence the accuracy... Read More about Influence of an inverter based DG on a double-ended fault location scheme.

Hybrid switched-capacitor/switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for hybrid energy sources EVs (2018)
Journal Article
Zhang, Y., Liu, Q., Gao, Y., Li, J., & Sumner, M. (2019). Hybrid switched-capacitor/switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for hybrid energy sources EVs. IEEE Transactions on Industrial Electronics, 66(4), 2680-2690. doi:10.1109/tie.2018.2850020

In this paper, a hybrid switched-capacitor/ switched-quasi-Z-source bidirectional dc-dc converter is proposed for electric vehicles (EVs) with hybrid energy sources, which has a wide voltage gain range in the bidirectional energy flows. Compared with... Read More about Hybrid switched-capacitor/switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for hybrid energy sources EVs.

An independently controlled energy storage to support short term frequency fluctuations in weak electrical grids (2018)
Journal Article
Jayamaha, P. C., Costabeber, A., Williams, A., & Sumner, M. (2018). An independently controlled energy storage to support short term frequency fluctuations in weak electrical grids. International Journal of Electrical Power and Energy Systems, 103, https://doi.org/10.1016/j.ijepes.2018.05.023

This paper proposes the use of Energy Storage (ES) to support frequency fluctuations in weak grids powered by low-power synchronous generators (SGs). Traditionally, large synchronous generators rely on high inertia and governor control to guarantee t... Read More about An independently controlled energy storage to support short term frequency fluctuations in weak electrical grids.

Predictive frequency-based sequence estimator for control of grid-tied converters under highly distorted conditions (2018)
Journal Article
Blanco, C., Garcia, P., Navarro-Rodríguez, Á., & Sumner, M. (2018). Predictive frequency-based sequence estimator for control of grid-tied converters under highly distorted conditions. IEEE Transactions on Industry Applications, 54(5), 5306-5317. https://doi.org/10.1109/TIA.2018.2846552

This paper proposes a novel frequency-based predictive sequence estimator that allows for the isolation of voltages and currents harmonic components needed for the control of grid-tied converters. The proposed method relays on an enhanced Sliding Goe... Read More about Predictive frequency-based sequence estimator for control of grid-tied converters under highly distorted conditions.

An enhanced hybrid switching-frequency modulation strategy for fuel cell vehicle three-level DC-DC converters with quasi-Z source (2018)
Journal Article
Zhang, Y., Shi, J., Fu, C., Zhang, W., Wang, P., Li, J., & Sumner, M. (2018). An enhanced hybrid switching-frequency modulation strategy for fuel cell vehicle three-level DC-DC converters with quasi-Z source. Energies, 11(5), 1-16. https://doi.org/10.3390/en11051026

For fuel cell vehicles, the fuel cell stack has a soft output characteristic whereby the output voltage drops quickly with the increasing output current. In order to interface the dynamic low voltage of the fuel cell stack with the required constant... Read More about An enhanced hybrid switching-frequency modulation strategy for fuel cell vehicle three-level DC-DC converters with quasi-Z source.

Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems (2018)
Journal Article
Zhang, Y., Gao, Y., Li, J., & Sumner, M. (2018). Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems. Journal of Power Electronics, 18(2), https://doi.org/10.6113/JPE.2018.18.2.343

A wide-voltage-conversion range bidirectional DC-DC converter is proposed in this paper. The topology is comprised of one typical LC energy storage component and the special common grounded asymmetric H-bridge with four active power switches/anti-par... Read More about Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems.

Observer-based pulsed signal injection for grid impedance estimation in three phase systems (2018)
Journal Article
Garcia, P., Sumner, M., Navarro-Rodríguez, Á., Guerrero, J. M., & Garcia, J. (in press). Observer-based pulsed signal injection for grid impedance estimation in three phase systems. IEEE Transactions on Industrial Electronics, https://doi.org/10.1109/TIE.2018.2801784

This paper addresses the estimation of the grid impedance and the control of grid-tied converters by combining pulsed-signal injection and observer based techniques. A Luenberger based observer is used for controlling the grid-side current of an LCL... Read More about Observer-based pulsed signal injection for grid impedance estimation in three phase systems.

A switched-capacitor bidirectional DC-DC converter with wide voltage gain range for electric vehicles with hybrid energy sources (2018)
Journal Article
Zhang, Y., Gao, Y., Zhou, L., & Sumner, M. (in press). A switched-capacitor bidirectional DC-DC converter with wide voltage gain range for electric vehicles with hybrid energy sources. IEEE Transactions on Power Electronics, PP(99), https://doi.org/10.1109/TPEL.2017.2788436

A switched-capacitor bidirectional DC-DC converter with a high step-up/step-down voltage gain is proposed for electric vehicles (EVs) with a hybrid energy source system (HESS). The converter presented has the advantages of being a simple circuit, a r... Read More about A switched-capacitor bidirectional DC-DC converter with wide voltage gain range for electric vehicles with hybrid energy sources.

Single-Switch, Wide Voltage-Gain Range, Boost DC–DC Converter for Fuel Cell Vehicles (2017)
Journal Article
Zhang, Y., Zhou, L., Sumner, M., & Wang, P. (2018). Single-Switch, Wide Voltage-Gain Range, Boost DC–DC Converter for Fuel Cell Vehicles. IEEE Transactions on Vehicular Technology, 67(1), 134-145. https://doi.org/10.1109/TVT.2017.2772087

In order to match voltages between the fuel cell stacks and the DC link bus of fuel cell vehicles, a single-switch Boost DC-DC converter with diode-capacitor modules is proposed in this paper. The capacitors are charged in parallel and discharged in... Read More about Single-Switch, Wide Voltage-Gain Range, Boost DC–DC Converter for Fuel Cell Vehicles.

A common ground switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for EVs with hybrid energy sources (2017)
Journal Article
Zhang, Y., Liu, Q., Li, J., & Sumner, M. (2018). A common ground switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for EVs with hybrid energy sources. IEEE Transactions on Industrial Electronics, 65(6), 5188-5200. https://doi.org/10.1109/TIE.2017.2756603

A common ground switched-quasi-Z-source bidirectional DC-DC converter is proposed for electric vehicles (EVs) with hybrid energy sources. The proposed converter is based on the traditional two-level quasi-Z-source bidirectional DC-DC converter, chang... Read More about A common ground switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for EVs with hybrid energy sources.

A Wide Input-Voltage Range Quasi-Z-Source Boost DC–DC Converter With High-Voltage Gain for Fuel Cell Vehicles (2017)
Journal Article
Zhang, Y., Fu, C., Sumner, M., & Wang, P. (2018). A Wide Input-Voltage Range Quasi-Z-Source Boost DC–DC Converter With High-Voltage Gain for Fuel Cell Vehicles. IEEE Transactions on Industrial Electronics, 65(6), 5201-5212. https://doi.org/10.1109/TIE.2017.2745449

A quasi-Z-source Boost DC-DC converter which uses a switched-capacitor is proposed for fuel cell vehicles. The topology can obtain a high voltage gain with a wide input-voltage range, and requires only a low voltage stress across each of the componen... Read More about A Wide Input-Voltage Range Quasi-Z-Source Boost DC–DC Converter With High-Voltage Gain for Fuel Cell Vehicles.

Grid impedance estimation for islanding detection and adaptive control of converters (2017)
Journal Article
Ghanem, A., Rashed, M., Sumner, M., Elsayes, M. A., & Mansy, I. (2017). Grid impedance estimation for islanding detection and adaptive control of converters. IET Power Electronics, 10(11), 1279-1288. https://doi.org/10.1049/iet-pel.2016.0780

Power system (grid) impedance is time varying due to the changing structure of the power system configuration and it can have a considerable influence on the control and stability of grid connected converters. This paper presents an online grid imped... Read More about Grid impedance estimation for islanding detection and adaptive control of converters.

Fault detection for PMSM motor drive systems by monitoring inverter input currents (2017)
Journal Article
Li, J., Sumner, M., Zhang, H., & Arellano-Padilla, J. (2017). Fault detection for PMSM motor drive systems by monitoring inverter input currents. https://doi.org/10.23919/TEMS.2017.7961339

This paper has proposed a fault detecting method for DC supplied permanent magnet synchronize motor (PMSM) drive systems by monitoring the drive DC input current. This method is based on the fault signal propagation from the torque disturbance on the... Read More about Fault detection for PMSM motor drive systems by monitoring inverter input currents.

Interleaved switched-capacitor bidirectional DC-DC converter with wide voltage-gain range for energy storage systems (2017)
Journal Article
Zhang, Y., Gao, Y., Li, J., & Sumner, M. (in press). Interleaved switched-capacitor bidirectional DC-DC converter with wide voltage-gain range for energy storage systems. IEEE Transactions on Power Electronics, https://doi.org/10.1109/TPEL.2017.2719402

In this paper, an interleaved switched-capacitor bidirectional DC-DC converter with a high step-up/step-down voltage gain is proposed. The interleaved structure is adopted in the low-voltage side of this converter to reduce the ripple of the current... Read More about Interleaved switched-capacitor bidirectional DC-DC converter with wide voltage-gain range for energy storage systems.

Predicting harmonic distortion of multiple converters in a power system (2017)
Journal Article
Ivry, P. M., Oke, O. A., Thomas, D. W. P., & Sumner, M. (2017). Predicting harmonic distortion of multiple converters in a power system. Journal of Electrical and Computer Engineering, 2017, 1-10. https://doi.org/10.1155/2017/7621413

Various uncertainties arise in the operation and management of power systems containing Renewable Energy Sources (RES) that affect the systems power quality. These uncertainties may arise due to system parameter changes or design parameter choice. In... Read More about Predicting harmonic distortion of multiple converters in a power system.

Historical data based energy management in a microgrid with a hybrid energy storage system (2017)
Journal Article
Jia, K., Chen, Y., Bi, T., Lin, Y., Thomas, D. W., & Sumner, M. (2017). Historical data based energy management in a microgrid with a hybrid energy storage system. IEEE Transactions on Industrial Informatics, 13(5), 2597-2605. https://doi.org/10.1109/TII.2017.2700463

In a micro-grid, due to potential reverse output profiles of the Renewable Energy Source (RES) and the load, energy storage devices are employed to achieve high self-consumption of RES and to minimize power surplus flowing back into the main grid. Th... Read More about Historical data based energy management in a microgrid with a hybrid energy storage system.

Input-Parallel Output-Series DC-DC Boost Converter With a Wide Input Voltage Range, For Fuel Cell Vehicles (2017)
Journal Article
Wang, P., Zhou, L., Li, J., Sumner, M., & Zhang, Y. (2017). Input-Parallel Output-Series DC-DC Boost Converter With a Wide Input Voltage Range, For Fuel Cell Vehicles. IEEE Transactions on Vehicular Technology, 66(9), 7771-7781. https://doi.org/10.1109/tvt.2017.2688324

An input-parallel, output-series DC-DC Boost converter with a wide input voltage range is proposed in this paper. An interleaved structure is adopted in the input side of this converter to reduce input current ripple. Two capacitors are connected in... Read More about Input-Parallel Output-Series DC-DC Boost Converter With a Wide Input Voltage Range, For Fuel Cell Vehicles.

Fault signal propagation through the PMSM motor drive systems (2017)
Journal Article
Li, J., Sumner, M., Arellano-Padilla, J., & Zhang, H. (in press). Fault signal propagation through the PMSM motor drive systems. IEEE Transactions on Industry Applications, 53(3), https://doi.org/10.1109/TIA.2017.2677881

This paper describes how a mechanical disturbance on the shaft of a variable speed permanent magnet motor (PMSM) is propagated to the supply input side of the drive system, and therefore may be detected by monitoring specific frequency components in... Read More about Fault signal propagation through the PMSM motor drive systems.

Sensorless speed control of five-phase PMSM drives with low current distortion (2017)
Journal Article
Saleh, K., & Sumner, M. (in press). Sensorless speed control of five-phase PMSM drives with low current distortion. Electrical Engineering, https://doi.org/10.1007/s00202-017-0511-9

This paper introduces a design for a sensorless control of a five-phase PMSM drive working at low and zero speeds with low current distortion. The rotor position is obtained through tracking the saturation saliency by measuring the dynamic currents r... Read More about Sensorless speed control of five-phase PMSM drives with low current distortion.

A modelling and simulation of a sensorless control of five-phase PMSM drives using multi-dimension space vector modulation (2016)
Journal Article
Saleh, K., & Sumner, M. (2016). A modelling and simulation of a sensorless control of five-phase PMSM drives using multi-dimension space vector modulation. TELKOMNIKA (Telecommunication, Computing, Electronics and Control), 14(4), https://doi.org/10.12928/TELKOMNIKA.v14i4.3996

This paper introduces a new method to track the saturation saliency for position measurement of a five-phase PMSM motor fed by a five-phase inverter through measuring the dynamic current response of the motor line currents due to the IGBT switching a... Read More about A modelling and simulation of a sensorless control of five-phase PMSM drives using multi-dimension space vector modulation.

Experimental evaluation of a CPT-based 4-leg active power compensator For distributed generation (2016)
Journal Article
Burgos-Mellado, C., Hernández-Carimán, C., Cardenas, R., Saez, D., Sumner, M., Costabeber, A., & Morales, H. (2017). Experimental evaluation of a CPT-based 4-leg active power compensator For distributed generation. IEEE Journal of Emerging and Selected Topics in Power Electronics, 5(2), 747-759. https://doi.org/10.1109/JESTPE.2016.2633064

Four-wire microgrids (MGs) and distribution systems are inherently unbalanced with the presence of negative and zero sequence components in voltages and currents. In small autonomous systems, the imbalance, in addition to the harmonic distortion prod... Read More about Experimental evaluation of a CPT-based 4-leg active power compensator For distributed generation.

A generalised model of electrical energy demand from small household appliances (2016)
Journal Article
Sancho-Tomás, A., Sumner, M., & Robinson, D. (2017). A generalised model of electrical energy demand from small household appliances. Energy and Buildings, 135, 350-366. https://doi.org/10.1016/j.enbuild.2016.10.044

Accurate forecasting of residential energy loads is highly influenced by the use of electrical appliances, which not only affect electrical energy use but also internal heat gains, which in turn affects thermal energy use. It is therefore important t... Read More about A generalised model of electrical energy demand from small household appliances.

High Ratio Bidirectional DC-DC Converter with a Synchronous Rectification H-Bridge for Hybrid Energy Sources Electric Vehicles (2016)
Journal Article
Zhang, Y., Gao, Y., Li, J., Sumner, M., Wang, P., & Zhou, L. (2016). High Ratio Bidirectional DC-DC Converter with a Synchronous Rectification H-Bridge for Hybrid Energy Sources Electric Vehicles. Journal of Power Electronics, 16(6), 2035-2044. https://doi.org/10.6113/JPE.2016.16.6.2035

In order to match the voltages between high voltage battery stacks and low voltage super-capacitors with a high conversion efficiency in hybrid energy sources electric vehicles (HESEVs), a high ratio bidirectional DC-DC converter with a synchronous r... Read More about High Ratio Bidirectional DC-DC Converter with a Synchronous Rectification H-Bridge for Hybrid Energy Sources Electric Vehicles.

Wide Input-Voltage Range Boost Three-Level DC–DC Converter With Quasi-Z Source for Fuel Cell Vehicles (2016)
Journal Article
Zhang, Y., Shi, J., Zhou, L., Li, J., Sumner, M., Wang, P., & Xia, C. (2017). Wide Input-Voltage Range Boost Three-Level DC–DC Converter With Quasi-Z Source for Fuel Cell Vehicles. IEEE Transactions on Power Electronics, 32(9), 6728-6738. https://doi.org/10.1109/TPEL.2016.2625327

© 1986-2012 IEEE. To solve the problem of the mismatched voltage levels between the dynamic lower voltage of the fuel cell stack and the required constant higher voltage (400 V) of the dc-link bus of the inverter for fuel cell vehicles, a boost three... Read More about Wide Input-Voltage Range Boost Three-Level DC–DC Converter With Quasi-Z Source for Fuel Cell Vehicles.

An islanding detection method for multi-DG systems based on high-frequency impedance estimation (2016)
Journal Article
Jia, K., Wei, H., Bi, T., Thomas, D. W., & Sumner, M. (2017). An islanding detection method for multi-DG systems based on high-frequency impedance estimation. IEEE Transactions on Sustainable Energy, 8(1), 74-83. https://doi.org/10.1109/TSTE.2016.2582846

Active islanding detection methods are generally employed for grid-connected inverter-based Distributed Generation (DG). However, there might be mutual influences and power quality issues caused by the disturbance signal when multiple inverters are i... Read More about An islanding detection method for multi-DG systems based on high-frequency impedance estimation.

High frequency impedance based fault location in distribution system with DGs (2016)
Journal Article
Jia, K., Bi, T., Ren, Z., Thomas, D. W., & Sumner, M. (2018). High frequency impedance based fault location in distribution system with DGs. IEEE Transactions on Smart Grid, 9(2), 807-816. https://doi.org/10.1109/TSG.2016.2566673

Distributed Generations (DGs) with power electronic devices and their control loops will cause distortion to the fault currents and result in errors for power frequency measurement based fault locations. This might jeopardize the distribution system... Read More about High frequency impedance based fault location in distribution system with DGs.

Evaluation of saliency tracking as an alternative for health monitoring in PMSM-drives under nonstationary conditions (2016)
Journal Article
Arellano-Padilla, J., Sumner, M., & Gerada, C. (2016). Evaluation of saliency tracking as an alternative for health monitoring in PMSM-drives under nonstationary conditions. IET Electric Power Applications, 10(4), 284-293. https://doi.org/10.1049/iet-epa.2015.0356

This paper evaluates the capability of saliency tracking to assess the health condition of permanent magnet synchronous motor (PMSM) drives operating under nonstationary conditions. The evaluated scheme is based on saliency tracking methods, which ar... Read More about Evaluation of saliency tracking as an alternative for health monitoring in PMSM-drives under nonstationary conditions.

A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop (2016)
Journal Article
Zhang, Y., Li, J., Li, X., Cao, Y., Sumner, M., & Xia, C. (2017). A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop. IEEE Transactions on Power Electronics, 32(1), 825-836. https://doi.org/10.1109/TPEL.2016.2536176

This paper investigates the problem of fluctuation of the neutral-point potential (NPP) in a three-level NPC inverter with a capacitor-voltage loop. The phase pulse width duty cycle disturbance PWM method is proposed to suppress the NPP fluctuation e... Read More about A method for the suppression of fluctuations in the neutral-point potential of a three-level NPC inverter with a capacitor-voltage loop.

Condition monitoring approach for permanent magnet synchronous motor drives based on the INFORM method (2016)
Journal Article
Arellano-Padilla, J., Sumner, M., & Gerada, C. (2016). Condition monitoring approach for permanent magnet synchronous motor drives based on the INFORM method. IET Electric Power Applications, 10(1), 54-62. https://doi.org/10.1049/iet-epa.2015.0148

This paper proposes a monitoring scheme based on saliency tracking to assess the health condition of PMSM drives operating under non stationary conditions. The evaluated scheme is based on the INFORM methodology, which is associated to the accurate s... Read More about Condition monitoring approach for permanent magnet synchronous motor drives based on the INFORM method.

Real-time deterministic power flow control through dispatch of distributed energy resources (2015)
Journal Article
Fazeli, A., Sumner, M., Johnson, C. M., & Christopher, E. (2015). Real-time deterministic power flow control through dispatch of distributed energy resources. IET Generation, Transmission and Distribution, 9(16), https://doi.org/10.1049/iet-gtd.2015.0182

Integration of intermittent renewable resources and mass electrification of heat and transport into the existing electricity network, with limited network asset reinforcement requires incorporation of intelligence in form of active management of flex... Read More about Real-time deterministic power flow control through dispatch of distributed energy resources.

On the energy demands of small appliances in homes (2015)
Journal Article
Sancho Tomas, A., Sumner, M., Lamparter, S., & Robinson, D. (2015). On the energy demands of small appliances in homes. Energy Procedia, 78, https://doi.org/10.1016/j.egypro.2015.11.755

Understanding the use of electrical appliances in households is crucial for improving the accuracy of electricity and energy loads forecasts. In particular, bottom-up techniques provide a powerful tool, not only for predicting demands considering soc... Read More about On the energy demands of small appliances in homes.

Marine power distribution system fault location using a portable injection unit (2014)
Journal Article
Jia, K., Bi, T., Liu, B., Christopher, E., Thomas, D. W., & Sumner, M. (2015). Marine power distribution system fault location using a portable injection unit. IEEE Transactions on Power Delivery, 30(2), https://doi.org/10.1109/TPWRD.2014.2364259

A portable injection unit for Active Impedance Estimation (AIE) is built and tested in a DC zonal marine power distribution system to provide useful information for system protection and restoration. The portable unit generates current “spikes” and i... Read More about Marine power distribution system fault location using a portable injection unit.

Real time parameter estimation for power quality control and intelligent protection of grid-connected power electronic converters (2014)
Journal Article
Sumner, M., Abusorrah, A., Thomas, D. W., & Zanchetta, P. (2014). Real time parameter estimation for power quality control and intelligent protection of grid-connected power electronic converters. IEEE Transactions on Smart Grid, 5(4), https://doi.org/10.1109/TSG.2014.2298495

This paper presents a method to identify power system impedance in real-time using signals obtained from grid- connected power electronic converters. The proposed impedance estimation has potential applications in renewable/distributed energy systems... Read More about Real time parameter estimation for power quality control and intelligent protection of grid-connected power electronic converters.

Advanced DC zonal marine power system protection (2014)
Journal Article
Jia, K., Christopher, E., Thomas, D. W., & Sumner, M. (2014). Advanced DC zonal marine power system protection. IET Generation, Transmission and Distribution, 8(2), https://doi.org/10.1049/iet-gtd.2013.0139

A new Active Impedance Estimation (AIE) based protection strategy which is suitable for utilization in a DC zonal marine power distribution system is presented. This method uses two triangular current "spikes" injections for system impedance estimati... Read More about Advanced DC zonal marine power system protection.

Mathematical analysis of the equivalent impedance at the harmonic frequency for the proposed aircraft power system (2013)
Journal Article
Zhou, Q., Sumner, M., & Thomas, D. (2013). Mathematical analysis of the equivalent impedance at the harmonic frequency for the proposed aircraft power system. IET Electrical Systems in Transportation, 3(4), https://doi.org/10.1049/iet-est.2011.0056

The proposals for the `More Electric Aircraft' place a significant, increased demand on the electrical power distribution system. To increase safety and reduce aircraft maintenance times on the ground, there is a greater need to quickly identify and... Read More about Mathematical analysis of the equivalent impedance at the harmonic frequency for the proposed aircraft power system.