Dr ALAN WATSON's Outputs (12)

Control of a modular multilevel converter with pulsed DC load (2016)
Presentation / Conference Contribution
Jankovic, M., Watson, A., Costabeber, A., & Clare, J. (2016, September). Control of a modular multilevel converter with pulsed DC load. Presented at 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA

This paper focuses on a Modular Multilevel Converter grid interface for a klystron modulator system that behaves as a pulsed DC load. With such a load, and without mitigating control, the MMC suffers from cell capacitor voltage imbalance between the... Read More about Control of a modular multilevel converter with pulsed DC load.

Submodule power losses balancing algorithms for the modular multilevel converter (2016)
Presentation / Conference Contribution
Picas, R., Pou, J., Zaragoza, J., Watson, A., Konstantinou, G., Ceballos, S., & Clare, J. (2016, October). Submodule power losses balancing algorithms for the modular multilevel converter. Presented at 42nd Annual Conference of IEEE Industrial Electronics Society (IECON 2016), Florence, Italy

Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may produce uneven switching tran... Read More about Submodule power losses balancing algorithms for the modular multilevel converter.

The Series Bridge Converter (SBC): Design of a compact modular multilevel converter for grid applications (2016)
Presentation / Conference Contribution
Amankwah, E. K., Costabeber, A., Watson, A., Trainer, D., Jasim, O., Chivite-Zabalza, J., & Clare, J. (2016, October). The Series Bridge Converter (SBC): Design of a compact modular multilevel converter for grid applications. Presented at 42nd Annual Conference of IEEE Industrial Electronics Society (IECON 2016), Florence, Italy

This paper presents a novel hybrid modular multilevel voltage source converter suitable for grid applications. The proposed converter retains the advantages of other modular multilevel topologies and can be made more compact making it attractive for... Read More about The Series Bridge Converter (SBC): Design of a compact modular multilevel converter for grid applications.

A high-power DC-DC converter based dual active bridge for MVDC grids on offshore wind farms (2016)
Presentation / Conference Contribution
Lee, Y., Vakil, G., Feldman, R., Watson, A. J., & Wheeler, P. (2016, September). A high-power DC-DC converter based dual active bridge for MVDC grids on offshore wind farms. Presented at 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe, Karlsruhe, Germany

This paper presents the steady-state analysis of a high power step-up DC-DC converter based three-phase dual active bridge (3DAB) for use as a medium voltage (MV) DC-DC collector of offshore wind farms. An optimization procedure for a high-power medi... Read More about A high-power DC-DC converter based dual active bridge for MVDC grids on offshore wind farms.

The Series Bridge Converter (SBC): A hybrid modular multilevel converter for HVDC applications (2016)
Presentation / Conference Contribution
Amankwah, E. K., Costabeber, A., Watson, A., Trainer, D., Jasim, O., Chivite-Zabalza, J., & Clare, J. (2016, September). The Series Bridge Converter (SBC): A hybrid modular multilevel converter for HVDC applications. Presented at 2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe), Karlsruhe, Germany

This paper presents a novel hybrid modular multilevel voltage source converter suitable for HVDC applications. It has the advantages of other modular multilevel topologies and can be made more compact making it attractive for offshore stations and ci... Read More about The Series Bridge Converter (SBC): A hybrid modular multilevel converter for HVDC applications.

Design and implementation of magnetron power supply and emulator (2016)
Presentation / Conference Contribution
Abodhir, N., Watson, A. J., Ji, C., & Clare, J. C. (2019, September). Design and implementation of magnetron power supply and emulator. Presented at 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe, Karlsruhe, Germany

The paper presents a novel resonant based high performance power converter solution for industrial magnetron systems. Based the characteristics of the magnetron, an emulator prototype is also proposed to represent the magnetron load behaviour in a la... Read More about Design and implementation of magnetron power supply and emulator.

A novel full soft-switching resonant power converter for mid-feeder voltage regulation of low voltage distribution network (2016)
Presentation / Conference Contribution
Ji, C., Watson, A. J., Clare, J. C., & Johnson, C. M. (2016, September). A novel full soft-switching resonant power converter for mid-feeder voltage regulation of low voltage distribution network. Presented at 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe, Karlsruhe, Germany

This paper presents a novel resonant based, high power density power electronics converter solution for mid-feeder voltage regulation of a low voltage (LV) distribution network. Owing to the use of high switching frequency operation and a full soft-s... Read More about A novel full soft-switching resonant power converter for mid-feeder voltage regulation of low voltage distribution network.

Novel current-limiting strategy for solid-state circuit breakers (SSCB) without additional impedance (2016)
Presentation / Conference Contribution
Gu, C., Effah, F. B., Castellazzi, A., Watson, A. J., & Wheeler, P. (2016, September). Novel current-limiting strategy for solid-state circuit breakers (SSCB) without additional impedance. Presented at 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe, Karlsruhe, Germany

Current-limiting strategies for solid-state circuit breaker (SSCB) without adding impedance is introduced in this paper. With the current limitation of novel phase-shifting method, the advantages are simple hardware structure, relatively low cost, no... Read More about Novel current-limiting strategy for solid-state circuit breakers (SSCB) without additional impedance.

A survey on configurations of current-limiting circuit breakers (CL-CB) (2016)
Presentation / Conference Contribution
Gu, C., Wheeler, P., Castellazzi, A., Watson, A. J., & Effah, F. B. A survey on configurations of current-limiting circuit breakers (CL-CB). Presented at 18th European Conference on Power Electronics and Applications

This paper presents a survey of topology configurations of current-limiting circuit breakers. Twelve different current-limiting topologies within four categories are detailed discussed and compared. It is concluded that active CL-CB may be a good cho... Read More about A survey on configurations of current-limiting circuit breakers (CL-CB).

Operation of a hybrid modular multilevel converter during grid voltage unbalance (2016)
Journal Article
Amankwah, E. K., Watson, A. J., & Clare, J. C. (2016). Operation of a hybrid modular multilevel converter during grid voltage unbalance. IET Generation, Transmission and Distribution, 10(12), 3102-3110. https://doi.org/10.1049/iet-gtd.2015.0766

© The Institution of Engineering and Technology. The recently proposed parallel hybrid modular multilevel converter is considered to be a low loss, low component count converter with soft switching capability of the 'main' H-bridge. The converter has... Read More about Operation of a hybrid modular multilevel converter during grid voltage unbalance.

An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids (2016)
Presentation / Conference Contribution
Lee, Y., Vakil, G., Watson, A. J., & Wheeler, P. An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids. Presented at IEEE Power and Energy Conference at Illinois

Due to the increasing installation of renewable and decentralized power sources, Medium-voltage dc (MVDC) grids has been considered for an alternative application to medium-voltage ac (MVAC) application. Three-phase dual active bridge DC-DC (3DAB) co... Read More about An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids.

Hybrid HVDC circuit breaker with self-powered gate drives (2016)
Journal Article
Effah, F. B., Watson, A. J., Ji, C., Amankwah, E. K., Johnson, C. M., Davidson, C., & Clare, J. C. (2016). Hybrid HVDC circuit breaker with self-powered gate drives. IET Power Electronics, 9(2), 228-236. https://doi.org/10.1049/iet-pel.2015.0531

The ever increasing electric power demand and the advent of renewable energy sources have revived the interest in high-voltage direct current (HVDC) multi-terminal networks. However, the absence of a suitable circuit breaker or fault tolerant VSC st... Read More about Hybrid HVDC circuit breaker with self-powered gate drives.