链式静止同步补偿器子模块电压均衡控制  

Control Strategy Research on Sub-module DC Voltage Balance for Star-connected Cascaded STATCOM

作　　者：谈竹奎 徐玉韬 袁旭峰[2] 王皆庆[3] TAN Zhu-kui;XU Yu-tao;YUAN Xu-feng;WANG Jie-qing(Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,China)

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵州贵阳550002 [2]贵州大学电气工程学院,贵州贵阳550025 [3]北京四方继保自动化股份有限公司,北京100085

出　　处：《电力电子技术》2019年第5期72-75,共4页Power Electronics

基　　金：中国南方电网公司重点科技项目(GZKJQQ-00000417)~~

摘　　要：链式静止同步补偿器(STATCOM)在实际运行中,解决级联H桥功率模块的电容电压平衡是装置安全可靠运行的关键问题。首先对链式STATCOM的基本模型进行分析,阐述其工作的基本原理;然后以补偿H桥功率单元的有功损耗为出发点,通过引入交流平衡因子,提出了一种新型的分离直流母线电容电压均衡控制策略,其无需额外的辅助电路、具有良好的动、稳态性能,并且实现简单。同时,分析了该均压控制策略对系统运行特性的影响。最后,搭建链式STATCOM实验平台,验证了该均压控制策略的有效性。In the actual operation of cascade static synchronous compensator(STATCOM),solving the capacitance voltage balance of the cascade H-bridge power module is a key issue for the STATCOM device.The basic model of the cascade STATCOM is analyzed,and the basic principles of its work are elaborated in the first.Then,to compensate the active loss of H-bridge power unit as the starting point,a new type of separate DC capacitance voltage balancing control strategy is proposed with AC balance factor introduced.It does not require additional auxiliary circuitry, and has good dynamic and steady state performance,and also is simple implemented.At the same time,the characteristics of the system under this balancing control strategy are analyzed.Finally, a cascaded STATCOM experimental platform is built,and the effectiveness of the control strategy is verified.

关 键 词：链式静止同步补偿器 电容电压均衡控制 平衡因子 

分 类 号：TN715[电子电信—电路与系统]