孙海渤,周杰,黄永红,汤茜.基于双电源交叉供电动态电压恢复装置研究[J].电测与仪表,2020,57(10):127-133. Sun Haibo,Zhou Jie,Huang Yonghong,Tang Qian.Research on Dynamic Voltage Restoration Device Based on Double Bus Crossing Power Supply[J].Electrical Measurement & Instrumentation,2020,57(10):127-133.
基于双电源交叉供电动态电压恢复装置研究
Research on Dynamic Voltage Restoration Device Based on Double Bus Crossing Power Supply
Aiming at the problem that multi-compensation devices work at the same time when voltage sags or interruptions occur in load-side multi-sensitive devices, which results in the interaction between devices and reduces the voltage recovery ability, a new structure of high-power dynamic voltage recovery device with centralized compensation at bus-side is proposed. The structure combines dynamic voltage restorer (DVR) with uninterruptible power system (UPS), and based on double power supply mode, by controlling the switching of islanding and grid-connected operation modes of compensation devices, the micro-grid works in three states: islanding operation mode, islanding and grid-connected mutual switching mode and grid-connected operation mode, the cross-supply of two-section buses is realized, and the reliability of sensitive loads in the micro-grid is ensured. The simulation results show that the structure can greatly improve the output capacity of the device, realize the long-term centralized compensation of voltage sag and interruption at bus side, and further improve the reliability of power supply for sensitive loads.