A VSG-Based Coordinated DC Voltage Control for VSC-HVDC to Participate in Frequency Regulation

Tianwen Zheng, Laijun Chen, Yan Guo, Wei Wei, Bo Zhou and Xinwei Sun
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Tianwen Zheng: Sichuan Energy Internet Research Institute, Tsinghua University, Chengdu 610213, China
Laijun Chen: New Energy (Photovoltaic) Industry Research Center, Qinghai University, Xining 810016, China
Yan Guo: Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing 100084, China
Wei Wei: Electric Power Research Institute, State Grid Sichuan Electric Power Company, Chengdu 610072, China
Bo Zhou: Electric Power Research Institute, State Grid Sichuan Electric Power Company, Chengdu 610072, China
Xinwei Sun: Electric Power Research Institute, State Grid Sichuan Electric Power Company, Chengdu 610072, China

Energies, 2021, vol. 14, issue 9, 1-13

Abstract: In this paper, a coordinated DC voltage control strategy is proposed based on the VSG (virtual synchronous generator) method for the VSC-HVDC transmission system to participate in the frequency regulation of the connected weak grid. The voltage and power control capability of the VSC-HVDC is explored to attenuate the rate of change of frequency and to diminish the deviation of frequency. This is realized by the coordinated control of DC voltages at both the sending and the receiving ends with the VSG method. A small-signal model is established to investigate the dynamics of the control system. A tuning method for the selection of control parameters is also discussed in detail. The validity and superiority of the proposed control strategy are tested in the scenarios of sudden load changes and short circuit faults.

Keywords: VSC-HVDC; frequency regulation; virtual synchronous generator; DC voltage control; small-signal model analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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