摘要
级联型静止同步补偿器(STATCOM)在高压大功率方面有广泛应用,针对其单元电压不平衡问题,本文在分析级联H桥级联型STATCOM工作原理的基础上,通过在输出的调制波上叠加一个有功电压矢量,解决了电容电压的平衡问题。同时,采用双闭环解耦控制,实现了系统的稳定工作。最后,在MATLAB/SIMULINK软件中构建了系统仿真模型,仿真结果显示系统运行稳定且各单元电容电压控制效果良好,验证了本文所提策略的有效性和H桥级联型STATCOM的无功补偿性能。
The static synchronous compensator （STATCOM） based on cascaded H-bridge is widely used in the field of high-power, but it has cell voltage imbalance problem. This paper analyzes the voltage imbalance problem of DC capacitor based on the principle of cascaded H-bridge STATCOM. The balance of the capacitor voltage is achieved by active voltage vector that is superimposed on the output modulation wave paralleled the direction of the output current. Meanwhile, system works stably through the double closed-loop decoupled control. In the end, system simulation model is constructed in MAT- LAB/SIMULINK. The imitation results show the good effect of the capacitor voltage control, and verifies the effectiveness of proposed strategy＇s effectiveness and the reactive comoensation of cascaded H-bridge STATCOM.
出处
《电测与仪表》
北大核心
2014年第1期49-53,共5页
Electrical Measurement & Instrumentation
基金
江苏高校优势学科建设工程资助项目(苏政办发[2011]6号)
关键词
级联多电平
解耦控制
直流电容电压平衡
无功补偿
cascaded multilevel, decoupling control, capacitance balance, reactive power compensation
