电力系统自动化2026，Vol.50Issue(11)：85-94,10.DOI:10.7500/AEPS20251223001
可关断电流源换流器谐波解析分析与影响评估
Analytical Harmonic Analysis and Impact Assessment of Switchable Current Source Converters
摘要
Abstract
In conventional high voltage direct current(HVDC)transmission,line commutated converters(LCCs)are employed at the receiving end.During AC voltage dips,the extinction angle margin decreases,which can easily trigger commutation failures.The switchable current source converter effectively avoids commutation failure risks by virtue of its active switchable capability.However,in transient conditions,after the fully controlled devices of the switchable current source converter are switched off,the surge arrester needs to be conducted to assist the commutation process.Nevertheless,the conduction of the surge arrester introduces additional forced commutation stages,which affects the harmonic characteristics of the system.In view of the current insufficiency in theoretical analytical research on this type of converter,this paper conducts an analytical analysis on the harmonic characteristics of the switchable current source converter and an assessment study on the filter stress.Firstly,the differences in the switching sequence of the controllable line commutated converter(CLCC)under steady-state and transient conditions and their impacts on the commutation characteristics are analyzed.Secondly,the analytical expressions of the voltage and current at each stage of the converter considering the influence of the forced commutation angle are derived.Thirdly,based on the fast Fourier transform(FFT)theory,the harmonic components on both AC and DC sides are accurately analyzed.Finally,a simulation model is built in PSCAD/EMTDC to verify the correctness and effectiveness of the proposed harmonic analysis method,and the current stress of the filter under various working modes is verified through simulation.关键词
电流源换流器/电网换相换流器/避雷器/谐波/换相/暂态工况/电流应力Key words
current source converter/line commutated converter(LCC)/surge arrester/harmonic/commutation/transient condition/current stress引用本文复制引用
贺之渊,高冲,李云丰,叶辉融,李婷婷,宁志彦..可关断电流源换流器谐波解析分析与影响评估[J].电力系统自动化,2026,50(11):85-94,10.基金项目
国家自然科学基金资助项目(U2166602). This work is supported by National Natural Science Foundation of China(No.U2166602). （U2166602）
