摘要
针对输入侧采用不可控整流AC/DC/AC结构的单相动态电压恢复器(DVR)输入侧功率因数低,谐波含量高等问题,提出了一种基于PWM斩波变换器的动态电压恢复器来补偿负载两端电压的跌落。该新型拓扑结构采用PWM斩波控制节省了直流侧电容,简化了滤波器设计,使输入侧线路中谐波含量降低,同时达到单位功率因数;电压检测采用单相信号构造成两相信号,利用瞬时无功理论对信号进行检测与处理,实时性高;搭建MATLAB/Simulink仿真和系统实验平台,验证其合理性和可行性。
In view of such problems as the low input side power factor of the single-phase dynamic voltage restorer （DVR） with the structure of uncontrolled rectifier AC/DC/AC and high harmonic content, this paper proposed a DVR based on the PWM chopper to compensate for the voltage drop at the two load ends. The new topology, which a- dopted the PWM chopper control, saved the DC capacitor and simplified the filter design so that the harmonic content in the input-side circuit was reduced and the input side achieved the unit power factor. Single-phase signals were con- structed into two-phase signals to detect voltage and the instantaneous reactive power theory was used to detect and process the signals, which attained high real time. Finally, a MATLAB/Simulink simulation and experimental plat- form was constructed to verify the rationality and feasibility of the new structure.
出处
《电测与仪表》
北大核心
2015年第11期96-100,共5页
Electrical Measurement & Instrumentation
