摘要
研究了相间功率控制器(IPC)的基本结构和数学模型,分析通用型IPC在正常运行和短路故障时有良好的潮流控制和限制短路电流特性,但是在断路故障时,IPC中电感和电容元件两端以及节点会产生严重的过电压。为了解决过电压的问题,在通用型IPC基础上加以改进:在IPC的受端加一个接地阻抗,通过调节接地阻抗的参数,从而协调输出功率,无功功率的降低可以使过电压得到降低。仿真说明了该方法的有效性,算例说明增加接地阻抗也能抑制节点的过电压。
The basic structure and mathematic model of IPC （Interphase Power Controller） are researched. General IPC controls power flow in normal operation and restricts short- circuit current during short-circuit fault,but serious over-voltage may occur between the two ends of inductor and capacitor and on the nodes during open- circuit fault. Countermeasure is suggested：impedance is added between the receiving end of IPC and ground. The output power is coordinated by adjusting the parameters of grounding impedance. The decrease of reactive power reduces over- voltage. Simulations indicate the validity of the improved method. An example shows that increase of grounding impedance may restrain the over-voltage of nodes.
出处
《电力自动化设备》
EI
CSCD
北大核心
2008年第10期49-52,共4页
Electric Power Automation Equipment
