| 引用本文: | 程启明,孙伟莎,程尹曼,谭冯忍,李涛,陈路.电网电压不平衡下MMC的无源控制策略[J].电力自动化设备,2019,39(4): |
| CHENG Qiming,SUN Weisha,CHENG Yinman,TAN Fengren,LI Tao,CHEN Lu.Passive control strategy of MMC under unbalanced grid voltage[J].Electric Power Automation Equipment,2019,39(4): |
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| 摘要: |
| 提出了电网电压不平衡条件下模块化多电平换流器(MMC)的无源控制方法，其能很好地解决电网电压不平衡条件下MMC存在的交流侧三相电流不对称、有功功率出现二次脉动、无功功率出现二次脉动的问题。根据MMC的拓扑结构，建立MMC在电网电压不平衡条件下的数学模型，分析MMC在电网电压不平衡条件下的内部特性，并在此基础上设计电网电压不平衡条件下的环流控制策略。基于存储函数的无源控制理论，针对上述3个不同的控制目标，制定相应的非线性无源控制策略。 |
| 关键词: 模块化多电平换流器 高压直流输电 不平衡电网电压 无源控制 PI控制 |
| DOI：10.16081/j.issn.1006-6047.2019.04.012 |
| 分类号:TM46;TM721.1 |
| 基金项目:国家自然科学基金资助项目(61573239)；上海市重点科技攻关计划项目(14110500700)；上海市电站自动化技术重点实验室项目(13DZ2273800) |
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| Passive control strategy of MMC under unbalanced grid voltage |
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CHENG Qiming1, SUN Weisha1, CHENG Yinman2, TAN Fengren1, LI Tao1, CHEN Lu1
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1.Shanghai Key Laboratory Power Station Automation Technology Laboratory, College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China;2.Shibei Power Supply Company, State Gird Shanghai Municipal Electric Power Company, Shanghai 200041, China
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| Abstract: |
| The passive control method of MMC(Modular Multilevel Converter) under unbalanced grid voltage is proposed, which can solve the problems of three-phase current asymmetry on AC-side, secondary pulsation of active and reactive power in MMC under unbalanced grid voltage. According to the topological structure of MMC, the mathematical model under unbalanced grid voltage is established, and the internal characteristics under the unbalanced condition of grid voltage are analyzed. On this basis, the circulating current control strategy under unbalanced grid voltage is further designed. Then, based on the passive control theory of storage function, the corresponding nonlinear passive control strategy is proposed for the above three different control objectives. |
| Key words: modular multilevel converter HVDC unbalanced grid voltage passive control PI control |
