南方电网技术2023，Vol.17Issue(11)：1-9,21,10.DOI:10.13648/j.cnki.issn1674-0629.2023.11.001
广东电网背靠背直流高频谐振风险及应对措施
Risk and Countermeasures of High-Frequency Resonance for Back-to-Back HVDC in Guangdong Power Grid
摘要
Abstract
After the VSC-HVDC transmission system based on modular multilevel converter(MMC)is connected to the power grid,high-frequency resonance may occur,which further leads to the implementation of blocking logic protection for VSC-HVDC converter station,which will have a serious impact on the AC main grid.Therefore,the study of VSC-HVDC high-frequency resonance and its suppression scheme has a significant role in improving engineering safety and reliability.Firstly,the harmonic impedance of Guangdong Power Grid's planning AC power grid in 2025 is scaned by HISCAN software,and the generalized Nyquist criterion is used to conduct a comprehensive investigation of the high-frequency oscillation risk points in the Guangdong power grid system.Then,the established electromagnetic transient model is used for time-domain simulation to evaluate and validate the high-frequency oscillation of the VSC-HVDC transmission system.Finally,relevant suppression strategies are proposed to address the potential high-frequency resonance points in the system to address the oscillation risk.关键词
模块化多电平换流器/柔性直流输电/高频谐振/抑制策略Key words
modular multilevel converter/VSC-HVDC/high-frequency resonance/suppression strategy分类
信息技术与安全科学引用本文复制引用
罗澍忻,刘瑞宽,金楚,左郑敏,林勇,张东辉,周强,王大洋..广东电网背靠背直流高频谐振风险及应对措施[J].南方电网技术,2023,17(11):1-9,21,10.基金项目
广东电网有限责任公司规划项目(031000QQ00200004) （031000QQ00200004）
国家重点研发计划资助项目(2019YFE0111500). Supported by the Planning Project of Guangdong Power Grid Co.,Ltd.(031000QQ00200004) （2019YFE0111500）
the National Key Research and Development Program of China(2019YFE0111500). （2019YFE0111500）
