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基于改进增益阻抗实部的配电网电压跌落源定位方法

, PP. 194-202

Keywords: 电压跌落,增益阻抗,配电网,定位判据

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Abstract:

针对基于增益阻抗实部的电压跌落源定位方法因部分非对称性电压跌落引起正序分量变化太小而难以准确定位问题,基于电压跌落源的不同类型,提出了一种基于增益阻抗理论的改进型电压跌落源定位方法。论文从基于增益阻抗理论的电压跌落源定位原理出发,针对国内配电网中性点的运行方式,推导出适用于不同电压跌落源类型的定位判据,并通过对配电变压器的电压跌落传递能力进行分析,建立国内中低压辐射型配电网电压跌落源定位策略。此外,论文还就系统暂态过程对增益阻抗计算结果的影响进行了分析。该方法物理概念明确、可实施性强、对线性及非线性负荷均适用,理论、仿真分析及模拟实验都验证了该方法的有效性。

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