基于Delta逆变技术的三相动态电压恢复器研制

Devolepment of Three-phase Dynamic Voltage Restorer Based on Delta Inverter Technology

电压凹陷已成为现代电力用户面临的最严重的电能质量问题之一,对企业造成巨大经济损失。解决电压凹陷的方法是在供电电源与用电设备间安装缓解设备,动态电压恢复器(Dynamic Voltage Restorer,简称DVR)已成为解决电压凹陷的首选方案。研制了基于Delta逆变技术的三相动态电压恢复器,DVR具有出现异常时退出检修的功能。DVR采用单极倍频正弦脉宽调制算法计算控制脉冲的宽度,该算法计算量小。最后给出了DVR的结构和实验结果。

Voltage sag has become one of the most serious power quality problem that the power users meet,and re-sults in huge economic loss for corporation.The power users should install restrainer between power system and load to solve voltage sag,and dynamic voltage restorer is first scheme for solving voltage sag.Dynamic voltage restorer based on Delta inverter technology is developed and can exit for repair if falure.Monopole double freqeuncy SPWM Algorithm is employed and its computation burden is small.The structure and experimental results of the retorter are showed.