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Energies 2017, 10(5), 621; doi:10.3390/en10050621

Networked Control of Electric Vehicles for Power System Frequency Regulation with Random Communication Time Delay

1
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
2
School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
3
School of Science and Engineering, Chinese University of Hong Kong (Shenzhen), Shenzhen 518100, China
4
Department of Electrical and Electronic Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan BE1410, Brunei
5
Division of Electric Vehicle Service, State Grid Zhejiang Electric Power Company, Hangzhou 310007, China
*
Author to whom correspondence should be addressed.
Academic Editor: K.T. Chau
Received: 4 February 2017 / Revised: 7 April 2017 / Accepted: 13 April 2017 / Published: 3 May 2017
(This article belongs to the Section Electrical Power and Energy System)
View Full-Text   |   Download PDF [3197 KB, uploaded 3 May 2017]   |  

Abstract

Electric vehicles (EVs) can have noteworthy impact on power system dynamic performance. This paper develops two novel controllers which can take into account the random time delay in the communication channel of the control system. With the designed robust controller, the system can utilize EVs to participate in automatic generation control (AGC) processes so as to assist conventional thermal power units to respond rapidly and accurately to load fluctuations, as well as to enhance the capability of a power system to accommodate renewable energy forms such as wind power. Owing to the distributed nature of EVs, a networked control scheme for EVs’ participation in frequency regulation is first proposed in the paper. A closed-loop block diagram, which incorporates EVs and wind power, is then developed. Two controllers are then designed based on rigorous linear matrix inequalities (LMI) theory to ensure the robustness and stability of the system. Finally, comprehensive case studies based on a two-area equivalent of the IEEE 39-bus test system are performed to demonstrate the effectiveness of the proposed methods. View Full-Text
Keywords: frequency regulation; electric vehicles; wind power; networked control; linear matrix inequalities; optimal H-PID full-state feedback control; suboptimal H-PID output feedback control frequency regulation; electric vehicles; wind power; networked control; linear matrix inequalities; optimal H-PID full-state feedback control; suboptimal H-PID output feedback control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Guo, Y.; Zhang, L.; Zhao, J.; Wen, F.; Salam, A.; Mao, J.; Li, L. Networked Control of Electric Vehicles for Power System Frequency Regulation with Random Communication Time Delay. Energies 2017, 10, 621.

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