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动态电压恢复器(dynamic voltage restorer,DVR)是用于电能质量控制的主要设备之一。文章设计了一种DVR拓扑结构,不同于传统三相独立补偿单元的DVR,它针对三相三线制电网,采用2个独立补偿单元,经由滤波电容直接串入主电网。根据技术要求设计实现的原理样机采用无差拍控制,通过线电压检测进行电压跌落补偿。实验证明,原理样机能及时检测系统电压扰动,并予以准确的补偿。
Dynamic voltage restorer (DVR) is one of the main equipment for power quality control. In this paper, a DVR topology is designed, which is different from the DVR of the traditional three-phase independent compensation unit. It uses two independent compensation units for the three-phase three-wire power system and directly crosses the main power grid through the filter capacitor. According to the technical requirements of the design and implementation of the principle prototype without beat control, voltage drop detection by line voltage compensation. Experiments show that the principle of the prototype can promptly detect system voltage disturbances, and be accurately compensated.