基于MMC的D-STATCOM直流侧电压控制策略研究  

Research on DC Side Voltage Control Strategy of D-STATCOM Based on MMC

作　　者：潘迪 张茂松[1,2] 张华赢 王群京 PAN Di;ZHANG Mao-song;ZHANG Hua-ying;WANG Qun-jing(Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学电气工程与自动化学院,安徽合肥230601 [2]安徽大学工业节电与电能质量控制协同创新中心,安徽合肥230601 [3]南方电网公司新型智慧城市高品质供电联合实验室(深圳供电局有限公司),广东深圳518020 [4]教育部电能质量工程研究中心(安徽大学),安徽合肥230601

出　　处：《电力电子技术》2021年第9期115-119,共5页Power Electronics

基　　金：南方电网公司科技项目(090000KK52190169/SZKJXM2019669)。

摘　　要：针对模块化多电平换流器(MMC)子模块单元器件参数差异、并联损耗等原因导致的配电网静止同步补偿器(D-STATCOM)直流侧电压不稳定问题,提出一种直流侧电压分层控制方法。通过电路的等效变换,建立基于MMC拓扑的D-STATCOM装置补偿电流和环流的数学模型,同时采用准比例谐振(PR)控制策略实现对指令补偿电流的跟踪和2倍频环流分量的抑制。通过对MMC模块整体、相间及各个单元分别控制,进而实现对直流电压的全局控制。最后,通过相关仿真和实验验证所提电流、电压控制策略的有效性。Aiming at the direct current side voltage instability of distribution static synchronous compensator(D-STATCOM) caused by the difference in parameters of modular multilevel converter(MMC) sub-module units and the loss in parallel,etc.,a method of hierarchical control of the direct current side voltage is proposed.By equivalent circuit transformation,the mathematical model of compensation current and circulation of D-STATCOM device based on MMC topology is established.Meanwhile,the quasi proportional resonant(PR) control strategy is adopted to track the instruction compensation current and suppress the two-frequency circulation component.By controlling the whole,interphase and each unit of MMC module respectively,the overall control of direct current voltage is realized.Finally,the effectiveness of current and voltage control strategy is verified by simulation and experiment.

关 键 词：配电网静止同步补偿器 模块化多电平换流器 电压控制 

分 类 号：TN715[电子电信—电路与系统]