摘要
动态电压恢复器(DVR)作为一种电力电子设备,是调节电网电压暂降的重要方法之一,通过向电网补偿适当的电压值,使负荷侧的电压恢复到跌落以前的正常值,维持负荷侧电压稳定,保证敏感负荷供电的连续性。本文在利用SVPWM技术控制DVR逆变单元三相电压源转换器进行直流/交流变换的同时,采用锁相环技术闭环控制负荷侧电压的方法。经过Matlab/Simulink软件进行的仿真和实验验证了所采用方法在对系统发生单相和三相电压暂降进行补偿时的有效性。
The DVR as a power electronics device is one of the most important methods to regulate voltage sages.By compensating an appropriate voltage to grid,it makes the DVR restores voltage waveform before sags maintain the load side voltage stability,and ensures the constant power supply of sensitive load.This paper presents the control dynamic voltage restorer based on SVPWM for three-phase voltage source converter of the inverter unit.It is the technique to utilize the DC-AC power conversion.The DVR control system consists of close loop load voltage using phase locked loop.Simulation results by using Matlab/Simulink software show that the performance of the method is effective to cope with the voltage sags caused by single-phase and the three-phase faults.
出处
《电测与仪表》
北大核心
2010年第8期61-64,共4页
Electrical Measurement & Instrumentation
