多运行方式SVG的电压调节

在常用动态无功补偿器的基础上加以改进,提出一种能实时对系统有功负荷补偿而维持系统正常运行的多运行方式的SVG。在系统负荷稳定时,SVG工作在负荷无功补偿状态下,输出负荷所需的无功电流;当系统电压因补偿区域的负荷突然加重而导致跌落较大时,装置适时改变运行方式,用于短时维持负荷点的电压,从而保证补偿点的电压。仿真结果表明,多运行方式的SVG具有响应速度快,能很好地维持补偿点的电压水平。

Voltage Regulation Based on Varied Working Mode of SVG

Based on the common dynamic reactive compensator,this paper proposed a new kind of compensator which has two working mode and can maintain the voltage when the loads＇ active power changes suddenly. When the load is steady,the compensator works at the state to export the loads＇ reactive power,and when the voltage descends rapidly as the result of the load aggravation,the system changes its working mode to maintain the voltage. The simulation result shows the new compensator responds to the system rapidly and has a good dynamic characteristic.