直接电容接入动态电压恢复器研究

Study on the dynamic voltage restorers with capacitor direct-coupled

动态电压恢复器能快速补偿电网电压变化,确保敏感负载端电压稳定,是用于电能质量控制的主要设备之一。介绍了一种基于电压型逆变器,采用直接电容接入电网的动态电压恢复器,以及根据技术要求设计实现其原理样机的过程。相较传统接入方式,该方案回避了接入变压器设计上的困难。仿真和实验结果证明原理样机能及时地检测系统电压扰动,并予以准确的补偿。

Dynamic voltage restorers can prevent the voltage of load end from voltage disturbance. It＇s one of important power quality control facilities. A novel dynamic voltage restorers with capacitor direct-coupled based on voltage source inverter is presented in this paper. The prototype of the DVR avoids the difficult of design of the series transformer for the conventional DVRs.The result of simulation and experiments shows the quick detection and correct compensation on voltage disturbance of the principle prototype machine.