电力系统保护与控制2026，Vol.54Issue(1)：28-39,12.DOI:10.19783/j.cnki.pspc.250261
基于STATCOM补偿换相电流的SLCC换相失败抑制方法
Method for suppressing commutation failure for SLCC based on STATCOM commutation current compensation
摘要
Abstract
In a DC transmission system based on multi-source self-adaptive line commutated converters(SLCC),commutation failure can be suppressed by configuring STATCOM to compensate reactive power under AC faults.However,under severe AC faults,commutation failure may still occur even when the STATCOM reaches its maximum compensation capacity.To address this issue,a commutation failure suppression method based on STATCOM commutation current compensation is proposed.First,the topology and control strategy of the SLCC-based DC transmission system are analyzed.Second,by examining the SLCC commutation process,it is found that the LCC commutation current is jointly provided by the AC grid and the STATCOM.Based on this,it is proposed to compensate the LCC commutation current by controlling the STATCOM output current to accelerate the commutation process and reduce the commutation overlap angle,thereby suppressing commutation failure.Compared with reactive power compensation based methods,the proposed method achieves better commutation failure suppression under the same STATCOM capacity.Finally,a SLCC DC transmission system model is built on the PSCAD simulation platform.Simulation results show that the proposed method can effectively enhance the ability of SLCC to withstand commutation failures.关键词
多源自适应换相换流器/换相失败/静止同步补偿器/谐波滤除/换相电流Key words
SLCC/commutation failure/STATCOM/harmonic filtering/commutation current引用本文复制引用
旷玮,江琴,徐瑞廷,李保宏,刘天琪,郑俊超,陶艳..基于STATCOM补偿换相电流的SLCC换相失败抑制方法[J].电力系统保护与控制,2026,54(1):28-39,12.基金项目
This work is supported by the Natural Science Foundation of Sichuan Province(No.2024NSFSC0865). 四川省自然科学基金项目资助(2024NSFSC0865) （No.2024NSFSC0865）
