南方电网技术2016，Vol.10Issue(2)：1-9,9.DOI:10.13648/j.cnki.issn1674-0629.2016.02.001
三相串联VSC的通用控制策略
Universal Control Strategy for Three-Phase Series-Connected Voltage Source Converters
摘要
Abstract
Three-phase series-connected VSCs are composed of three single-phase VSCs connected in series at the DC side. Compared with conventional three-phase parallel-connected VSCs,this topology reduces the number of swithing devices offectively to withstand the same DC voltage and therefore reduces the investment. Firstly,the basic principle of three-phase series- connected VSCs riding though AC faults by mean of AC power regulation are analyzed,and then considering the connections of transformer windings,the corresponding current control schemes are proposed to achieve four various control objectives under AC faults,i.e.,balancing AC current,suppressing ripples of instantaneous active power,suppressing ripples of instantaneous reactive power and suppressing zero-se-quence current. The approach to derive the reference currents is presented and the expressions of current references corresponding to four different control schemes are also derived. Finally,simulations are performed in PSCAD/EMTDC and the results validate the pro-posed control strategies.关键词
直流电网/广义同步坐标系/不对称交流电压/三相串联VSC/控制策略Key words
HVDC grid/general synchronous frame/unbalanced AC voltages/three-phase series-connected VSC/control strategy分类
信息技术与安全科学引用本文复制引用
郭宝甫,徐军,郝全睿,高峰..三相串联VSC的通用控制策略[J].南方电网技术,2016,10(2):1-9,9.基金项目
国家自然科学基金资助项目（51507093）；山东省自然科学基金资助（ZR2014EEQ033）。@@@@Supported by the National Natural Science Founda-tion of China （51507093）；Shandong Provincial Natural Science Foun-dation，China （ZR2014EEQ033）． （）
