电力工程技术2025，Vol.44Issue(4)：42-51,10.DOI:10.12158/j.2096-3203.2025.04.005
基于零序抑制的柔性互联装置多工况控制切换策略
Multi-condition control switching strategy for flexible interconnection devices based on zero-sequence suppression
摘要
Abstract
The flexible multi-state switch(FMSS),as a new generation of flexible interconnection device,enables flexible interconnection between different feeders in distribution networks by replacing traditional tie switches.However,the influence of zero-sequence current on the stable operation of the FMSS under asymmetrical fault conditions has not been fully considered in existing research on FMSS control mode transitions.This leads to AC oscillation in the DC voltage before the asymmetrical fault is cleared.To address this issue,a multi-mode control transition strategy based on zero-sequence suppression is proposed for flexible interconnection devices.Firstly,the smooth transition between PQ control mode and UdcQ control mode during faults is improved by the introduction of a steady-state inverse model.Subsequently,the smooth transition among PQ control mode,UdcQ control mode,and Vf droop control mode during faults is improved by the introduction of state tracking control.Finally,the impact of the zero-sequence current component on the DC voltage during asymmetrical faults is reduced by the introduction of a zero-sequence current suppression strategy based on a proportional resorant(PR)regulator.A three-port FMSS simulation model is established in MATLAB/Simulink to verify the proposed control strategy.Simulation results demonstrate that the proposed control mode transition strategy effectively reduces DC voltage fluctuation and AC voltage/current phase offset under various fault conditions.关键词
柔性多状态开关(FMSS)/稳态逆模型/状态跟踪控制/零序抑制/平滑切换/多故障工况Key words
flexible multi-state switch(FMSS)/steady-state inverse model/state tracking control/zero-sequence suppression/smooth switching/multi-fault conditions分类
信息技术与安全科学引用本文复制引用
杨晓岚,袁宇波,陈星莺,余昆,周琦,刘瑞煌..基于零序抑制的柔性互联装置多工况控制切换策略[J].电力工程技术,2025,44(4):42-51,10.基金项目
国家重点研发计划资助项目"配电网高功率密度柔性互联技术和装备"(2023YFB2407400) 本文得到国网江苏省电力有限公司科技项目"电容补偿型低压串联柔性互联装置技术研究"(J2024219)资助,谨此致谢! （2023YFB2407400）
