Journal of Modern Power Systems and Clean Energy

ISSN 2196-5625 CN 32-1884/TK

Decentralized Primary Frequency Regulation for Hybrid Multi-terminal Direct Current Power Systems Considering Multi-source Enhancement

1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.Economic Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310016, China

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This work was supported by the National Natural Science Foundation of China (No. 52077196) and the Science and Technology Project of State Grid Zhejiang Electric Power Co., Ltd. (No. 5211JY21N001).

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    Hybrid multi-terminal direct current (MTDC) transmission technology has been a research focus, and primary frequency regulation (FR) improvement in the receiving-end system is one of the problems to be solved. This paper presents a decentralized primary FR scheme for hybrid MTDC power systems considering multi-source enhancement to help suppress frequency disturbance in receiving-end systems. All the converters only need local frequency or DC voltage signal input to respond to system disturbance without communication or a control center, i.e., a decentralized control scheme. The proposed scheme can activate appropriate power sources to assist in FR in various system disturbance severities with fine-designed thresholds, ensuring sufficient utilization of each power source. To better balance FR performance and FR resource participation, an evaluation index is proposed and the parameter optimization problem is further conducted. Finally, the validity of the proposed scheme is verified by simulations in MATLAB/Simulink.

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  • Received:January 12,2023
  • Revised:March 08,2023
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  • Online: May 20,2024
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