基于MMC的STATCOM改进下垂控制策略研究  

Research on Improved Droop Control for MMC-STATCOM

作　　者：王英男[1] 任哲[1] 马荣琳[2,3] 高厚磊[2] 

机构地区：[1]国网辽宁省电力有限公司沈阳供电公司,辽宁沈阳110811 [2]山东大学电气工程学院,山东济南250061 [3]山东迪生电气股份有限公司,山东济南250300

出　　处：《电气传动》2015年第6期73-76,80,共5页Electric Drive

基　　金：国家高技术研究发展计划(863计划)重点项目(2012AA050213);沈阳苏家屯区域电网智能无功补偿示范工程(辽电发策[2011]1044号)

摘　　要：模块化多电平技术(MMC)已经用于静止无功补偿器(STATCOM)中,称之为M-STATCOM。对于M-STATCOM,不同模块之间的电流均衡控制对整个系统的可靠运行非常重要,传统电流均衡控制存在着对模块电压调节适应性不足等问题。从M-STATCOM数学模型入手,分析了M-STATCOM中变换器的下垂特性,并以此提出基于下垂控制的一种改进电流均衡方法,可以自适应的控制每个模块的基准电压,同时实现M-STATCOM的均压均流控制。通过理论分析和实验验证,证明所提方法的有效性,提高了M-STATCOM的控制性能。Modular multi-level technology has been used for static synchronous compensator （STATCOM）and called the M- STATCOM. For M- STATCOM, the current balance between different modules is very important for reliable operation of the entire control system. Compared with traditional current balance control method, the method based on inverter droop characteristics can be achieved without interconnection lines between modules in parallel, but also there is the module voltage regulator insufficient adaptability problem. A current balanced approach based on M- STATCOM droop characteristics was proposed, which can make the reference voltage balance of each module to achieve M-STATCOM equalizing flow control. Both through theoretical analysis and experimental verification, the proposed method is proved to be effective. The control performance of M-STATCOM can be improved.

关 键 词：模块化多电平技术 改进下垂控制 电流均衡控制 

分 类 号：TM46[电气工程—电器]