论文部分内容阅读
为了抑制系统电压的跌落和消除电压谐波,提出了一种新型的三相串联电压质量控制器。利用向量图和几何方法对串联控制器的补偿极限进行了分析,提出了向三相三线制系统中注入零序电压以提高串联单元补偿极限的方法。新型的补偿电压控制算法可以快速得到三相交流补偿电压。利用对补偿极限的研究结果和补偿电压的控制算法,串联装置可以对稳态电压跌落和电压谐波进行治理,并且极大地提高了补偿极限。运用电力系统仿真软件PSCAD/EMTDC对该方法进行仿真,结果证明了理论分析和设计的有效性。
In order to suppress the drop of system voltage and eliminate the voltage harmonics, a new type of three-phase series voltage quality controller is proposed. The compensation limit of series controller is analyzed by using vector diagram and geometric method. A method of injecting zero-sequence voltage into three-phase three-wire system to increase the compensation limit of series unit is proposed. The new compensation voltage control algorithm can quickly get three-phase AC compensation voltage. Using the research results of the compensation limit and the control algorithm of the compensation voltage, the series device can control the steady-state voltage drop and voltage harmonic and greatly improve the compensation limit. The power system simulation software PSCAD / EMTDC is used to simulate this method. The result proves the validity of theoretical analysis and design.