【摘要】 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。更多还原

【Abstract】 A novel threephase serial connected voltage quality controller was developed to suppress voltage sag and eliminate voltage harmonics. The system voltage limit was analyzed using phase diagrams. The system compensation limit can be increased by injecting a proper zero sequence voltage into the system. The compensating voltage calculation method can directly calculate the missing voltage. The method can compensate for both steadystate voltage drops and the voltage harmonics. PSCAD/EMTDC simulation results prove the feasibility of the method.更多还原