The Influence of UHVDC Additional Frequency Controller on Automatic Generation Control

doi:10.11930/j.issn.1004-9649.202005102

Abstract

Abstract: The asynchronous interconnection of UHVDC in regional power grid has brought about the adaption problem of automatic generator control (AGC) strategy to UHVDC frequency control (FC). In order to analyze the influence of FC equipped in UHVDC on the AGC, the quasi-steady models of FC and AGC are used to find out the interaction mechanism between AGC and FC system. The power system full dynamic simulation (PSD-FDS) platform developed by China Electric Power Research Institute (EPRI) is applied to simulate the dynamic process of FC and AGC, and further analysis is made on the influence of FC on AGC both in the time domain and frequency domain, and some suggestions are proposed on optimization of the AGC strategy. The analysis results show that the fluctuation of frequency can be alleviated when FC is used, but the power loss of power systems needs to be compensated by AGC when serious fault occurs, it needs to be considered under the TBC mode that coordination of FC and AGC is set up to avoid the problems of AGC in re-regulation and slow recovery of frequency during serious faults.

Key words: UHVDC, asynchronous interconnection, AGC, UHVDC additional frequency controller, PSD-FDS

WU Lingyun, HE Li, XIAO Xiong, TAN Chao, CHEN Gang, ZHOU Lin. The Influence of UHVDC Additional Frequency Controller on Automatic Generation Control[J]. Electric Power, 2021, 54(8): 68-74.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202005102

https://www.electricpower.com.cn/EN/Y2021/V54/I8/68

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