级联多电平动态电压恢复器的研究与设计

Research and System Design of Cascaded Multilevel Dynamic Voltage Restorer

动态电压恢复器(dynamic voltage restorer,DVR)是解决电压暂升暂降的有效途径,保证用户侧敏感负荷的供电质量。文中研究了额定电压10 kV额定补偿容量1 MV·A的动态电压恢复器的系统设计及实验方案,针对系统主电路结构及拓扑、储能选择、滤波器设计、控制策略、工作模式等方面进行了详细的方案设计。对研制的DVR进行了补偿精度及谐波、跌落识别及响应时间测试等实验,结果表明该装置性能优越,响应速度快,补偿精度高,能有效提高供电质量。

Applying dynamic voltage restorers （DVR）is an effective way to solve voltage swell or dips,and to improve power quality of customer sensitive load. This paper relies on the system study and testing methods of dynamic voltage restorer which has 10 kV rated voltage and 1 MV-A rated compensation capacity. The analytical study on main circuit topology, choose of energy storage,filter design,control strategy and operation pattern etc is performed. Tests such as compensation accuracy and harmonic, response to voltage fluctuation etc are performed. Test results show that the equipment has an excellent performance, quick response and high accuracy of compensation.