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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.

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.

A Wideband Fault Location Scheme for Active Distribution Systems (2018)
Conference Proceeding
Aboshady, F., Sumner, M., & Thomas, D. (2018). A Wideband Fault Location Scheme for Active Distribution Systems. In 2018 International Conference on Renewable Energy Research and Applications (ICRERA) (891-896). https://doi.org/10.1109/ICRERA.2018.8566780

This paper proposes a fault location technique for future distribution systems with distributed generation. The technique considers the circuit analysis at the non-fundamental frequencies that are generated when a fault occurs. To consider both induc... Read More about A Wideband Fault Location Scheme for Active Distribution 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.

Zero and low-speed sensorless control of induction machines using only fundamental pulse width modulation waveform excitation (2018)
Book Chapter
Gao, Q., Asher, G., & Sumner, M. (2018). Zero and low-speed sensorless control of induction machines using only fundamental pulse width modulation waveform excitation. In A. G. Aissaoui (Ed.), Optimization and control of electrical machines (57-71). London: InTech. https://doi.org/10.5772/intechopen.75892

This chapter presents a position sensorless method for induction machines that only relies on the fundamental pulse width modulation (PWM) waveforms to excite saliency. Position signals can be synthesized through the measurement of the derivatives of... Read More about Zero and low-speed sensorless control of induction machines using only fundamental pulse width modulation waveform excitation.

Sensorless Control of a Fault Tolerant Multi-level Inverter PMSM Drives in Case of an Open Circuit Fault (2018)
Conference Proceeding
Saleh, K., & Sumner, M. (2018). Sensorless Control of a Fault Tolerant Multi-level Inverter PMSM Drives in Case of an Open Circuit Fault. In 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM) (883-888). https://doi.org/10.1109/SPEEDAM.2018.8445360

© 2018 IEEE. This paper introduces a fault tolerant multi-level inverter PMSM Drive that is capable to work in case of a single phase open circuit fault without degrading the system performance. Moreover, it can work in sensorless mode in case of an... Read More about Sensorless Control of a Fault Tolerant Multi-level Inverter PMSM Drives in Case of an Open Circuit Fault.

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.

Sizing guidelines for grid-connected decentralised energy storage systems: single house application (2018)
Conference Proceeding
Panagiotou, K., Klumpner, C., & Sumner, M. (2018). Sizing guidelines for grid-connected decentralised energy storage systems: single house application.

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.

Wide frequency range active damping of LCL-filtered grid connected converters (2018)
Conference Proceeding
Ghanem, A., Rashed, M., Sumner, M., El-Sayes, M., & Mansy, I. (2018). Wide frequency range active damping of LCL-filtered grid connected converters.

It can be challenging to guarantee the stability of grids with many converters with LCL filters connected due to the presence of multiple resonances within the system. This paper presents an active damping technique to mitigate multiple resonance eff... Read More about Wide frequency range active damping of LCL-filtered grid connected converters.

Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs (2018)
Conference Proceeding
Fares, A., Klumpner, C., & Sumner, M. (2018). Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs.

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.

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.

Per-phase controller for medium voltage full-bridge modular multilevel converters (2017)
Conference Proceeding
Noori, A., Costabeber, A., Sumner, M., & Thomas, D. (2017). Per-phase controller for medium voltage full-bridge modular multilevel converters. In International Conference on Resilience of Transmission and Distribution Networks (RTDN 2017). https://doi.org/10.1049/cp.2017.0331

This work proposes a per-phase control architecture for a fullbridge modular multilevel converter (FB-MMC) intended for medium voltage applications, such as MVDC multi-terminal distribution networks in off-shore wind farms or MVDC networks in industr... Read More about Per-phase controller for medium voltage full-bridge modular multilevel converters.

Fast fault location scheme for distribution systems based on fault transients (2017)
Conference Proceeding
Aboshady, F., Thomas, D. W., & Sumner, M. (2017). Fast fault location scheme for distribution systems based on fault transients. In IET International Conference on Resilience of Transmission and Distribution Networks (RTDN 2017) (1-6). https://doi.org/10.1049/cp.2017.0327

This paper presents a combined double-end and single-end fault locator for distribution systems. The technique lies under the impedance based category and uses the fault generated high frequency components to locate the faults. The combination of dou... Read More about Fast fault location scheme for distribution systems based on fault transients.