Two-stage Correction Strategy-based Real-time Dispatch for Economic Operation of Microgrids

doi:10.23919/CJEE.2022.000013

Chinese Journal of Electrical Engineering ›› 2022, Vol. 8 ›› Issue (2): 42-51.doi: 10.23919/CJEE.2022.000013

Special Issue: Special Issue on Active Control and Protection of Future Renewables-dominated Distribution Grid

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Two-stage Correction Strategy-based Real-time Dispatch for Economic Operation of Microgrids

Jingliao Sun¹, Changhong Hu¹, Lei Liu², Bei Zhao¹, Jinyuan Liu¹, Jianquan Shi^3,*

1. Wenzhou Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd., Wenzhou 325028, China;
2. School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
3. School of Automation, Nanjing Institute of Technology, Nanjing 211167, China

Received:2021-12-11 Revised:2022-03-18 Accepted:2022-04-18 Online:2022-06-25 Published:2022-07-08
Contact: * E-mail: shijianquan@njit.edu.cn
About author:Jingliao Sun received the Ph.D. degree from the Tianjin University, Tianjin, China, in 2010.He is currently with the Wenzhou Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd. His current research interests include the optimization and operation of power system.
Changhong Hu received the M.S. degree from Zhejiang University, Zhejiang, China, in 2010. He is currently with the Wenzhou Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd. His current research interests include the optimization and operation of power system.
Lei Liu received the B.S. degree from the Hefei University of Technology, Anhui, China, in 2020. He is currently pursuing the master's degree with the School of Electrical Engineering, Xi'an Jiaotong University, China.His current research interests include the operation optimization of power system and renewable energy generation.
Bei Zhao received the B.S. degree from Zhejiang University, Zhejiang, China, in 2006. He is currently with the Wenzhou Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd. His current research interests include the optimization and operation of power system.
Jinyuan Liu received the B.S. degree from the Chongqing University, Chongqing, China, in 2010. He is currently with the Wenzhou Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd. His current research interests include the optimization and operation of power system.
Jianquan Shi received the B.S. degree from Qingdao University of Technology, China, in 2013, and the Ph.D. degree in School of Electrical Engineering from Xi'an Jiaotong University, China, in 2020.He is currently a Lecturer in School of Automation from Nanjing Institute of Technology, China. His current research interests include renewable energy generation and stability analysis.

Abstract

Abstract: Given the different energy rates of multiple types of power generation units, different operation plans affect the economy of microgrids. Limited by load and power generation forecasting technologies, the economic superiority of day-ahead plans is unable to be fully utilized because of the fluctuation of loads and power sources. In this regard, a two-stage correction strategy-based real-time dispatch method for the economic operation of microgrids is proposed. Based on the optimal day-ahead economic operation plan, unbalanced power is validly allocated in two stages in terms of power increment and current power, which maintains the economy of the day-ahead plan. Further, for operating point offset during real-time correction, a rolling dispatch method is introduced to dynamically update the system operation plan. Finally, the results verify the effectiveness of the proposed method.

Key words: Real-time dispatch, day-ahead operation plan, economic operation, microgrid

Jingliao Sun, Changhong Hu, Lei Liu, Bei Zhao, Jinyuan Liu, Jianquan Shi. Two-stage Correction Strategy-based Real-time Dispatch for Economic Operation of Microgrids[J]. Chinese Journal of Electrical Engineering, 2022, 8(2): 42-51.

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Two-stage Correction Strategy-based Real-time Dispatch for Economic Operation of Microgrids

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