两相坐标系下MMC环流抑制策略

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。...

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Bibliographic Details
Published in电测与仪表 Vol. 51; no. 20; pp. 80 - 84
Main Author 宋平岗 江浪 李云丰
Format Journal Article
LanguageChinese
Published 华东交通大学 电气与电子工程学院,南昌,330013 2014
Subjects
均衡控制
模块化多电平换流器
环流抑制
高压直流输电
均衡控制
balanced con-trol
high voltage direct current
模块化多电平换流器
circulating current suppression
高压直流输电
modular multilevel converter
环流抑制
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ISSN1001-1390

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Summary: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。
Bibliography:23-1202/TH
SONG Ping-gang, JIANG Lang, LI Yun-feng （College of Electrical and Electronic Engineering, East China JiaoTong University, Nanehang 3300139 China）
modular multilevel converter;high voltage direct current;circulating current suppression;balanced con-trol
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.
ISSN:1001-1390