负荷阻抗分析在闪变源识别中的应用

Applying Load Resistance Analysis to Identification of Flicker Source

为解决供电系统中电压闪变问题提出了一种闪变源识别方法。该方法对发生闪变时供电系统中各负荷支路进行阻抗等效,并利用负荷的电压、电流录波数据辨识各负荷支路的等效阻抗参数。将该阻抗参数接入闪变识别系统进行仿真,以识别供电系统中的闪变源。该方法不仅可以识别负荷支路,而且可以识别供电电源是否为闪变源。计算结果表明:该方法可以有效地识别供电系统中的闪变源,且识别时需要的原始数据较少,计算速度快,可以实现在线实时识别。

In order to solve the problem of voltage flicker in power system, a method for identifying flicker source is presented. The load branches in power system are equivalent as a resistance when flicker happening then the parameters of this resistance are identificated according to temporal date of voltage and current of this branch. This resistance is joined to a flicker identifing system to identify the flicker source. This arithmetic can identify not only load branch but also whether power supply is flicker source, The results of this example show that the flicker source can be distinguished from the power supply system fleetly and effectively by this arithmetic. What＇s more, this arithmetic only requires less original dates, so it can identify flicker source of the power system on line. All in all, this example proves this arithmetic is a promising method to identify the filcker source of the power system.