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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.

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.

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.

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.