摘要
基于级联H桥逆变器拓扑结构,将载波移相SPWM技术应用于链式静止同步补偿器(STAT-COM)系统中,有效地改善交流侧输出电压特性。同时,在低开关频率下,可以获得较高的输出电压等级,降低自身的电压谐波成分。此外,结合反馈解耦控制理论,重点研究电流环参数的变化对STATCOM系统特性的影响,并搭建低压1140V链式STATCOM试验平台,给出实际应用中最优PI参数控制范围,证实了STATCOM具有调节速度快、补偿效果好等优点。
Based on cascaded H-bridge inverter topology, the method of CPS-SPWM （Carrier Phase Shifting SP- WM） is applied to the system of STATCOM. This method can effectively improve the characteristics of AC output voltage. Meanwhile, under the lower switching frequency, it is possible to obtain a higher output voltage level and to reduce output voltage harmonic contents. In addition, combining with theory of the feedback decoupling control, we make key researches on the characteristics of STATCOM system while changing the parameters of current loop. We also build a low-voltage 1140V cascaded STATCOM test platform, and the practical range of optimal PI parame- ters is given in field applications. It confirms that the STATCOM has a fast response and a perfect compensation effect.
出处
《电工电能新技术》
CSCD
北大核心
2013年第3期62-66,共5页
Advanced Technology of Electrical Engineering and Energy
