电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2014年
20期
80-84
,共5页
模块化多电平换流器%高压直流输电%环流抑制%均衡控制
模塊化多電平換流器%高壓直流輸電%環流抑製%均衡控製
모괴화다전평환류기%고압직류수전%배류억제%균형공제
modular multilevel converter%high voltage direct current%circulating current suppression%balanced con-trol
MMC的相间环流具有二倍频负序性质，不会对外电路造成影响，但会增加电容电压、桥臂电流的波动程度以及系统损耗和电磁干扰，降低了MMC运行效率和使用寿命。在αβ坐标系下，将载波移相调制策略和排序算法相结合，采用比例谐振积分控制器，提出了一种无需旋转坐标变换的环流抑制策略。最后在MATLAB/Simulink中搭建了MMC-HVDC仿真模型，仿真结果表明所提策略的正确性和有效性。
MMC的相間環流具有二倍頻負序性質，不會對外電路造成影響，但會增加電容電壓、橋臂電流的波動程度以及繫統損耗和電磁榦擾，降低瞭MMC運行效率和使用壽命。在αβ坐標繫下，將載波移相調製策略和排序算法相結閤，採用比例諧振積分控製器，提齣瞭一種無需鏇轉坐標變換的環流抑製策略。最後在MATLAB/Simulink中搭建瞭MMC-HVDC倣真模型，倣真結果錶明所提策略的正確性和有效性。
MMC적상간배류구유이배빈부서성질，불회대외전로조성영향，단회증가전용전압、교비전류적파동정도이급계통손모화전자간우，강저료MMC운행효솔화사용수명。재αβ좌표계하，장재파이상조제책략화배서산법상결합，채용비례해진적분공제기，제출료일충무수선전좌표변환적배류억제책략。최후재MATLAB/Simulink중탑건료MMC-HVDC방진모형，방진결과표명소제책략적정학성화유효성。
The double frequency negative circulating current among MMC three phases increase the voltage fluctuation of capacitor,arm current distortion,system losses and electro- magnetic interference,although they do not influence the outer circuit. Combining carrier phase shifted modulation strategy with sorting algorithm,a circulating current sup-pression control strategy is proposed without rotating coordinate transformation by adopting proportion resonance inte-gral controller under αβ coordinate. Finally,a MMC-HVDC simulation system is constructed in MATLAB/Simulink and the simulation results show that the proposed strategy is correctness and validity.
