基于Karrenbauer相模变换的低压供电线路阻抗量测方法

Impedance Measurement Method of Low-voltage Power Supply Line Based on Karrenbauer Phase-mode Transformation

为解决低压供电线路参数精准量测困难的问题,提出一种基于相模变换的低压供电线路阻抗智能量测方法,该方法利用智能电能表采集线路各节点数据,通过Karrenbauer(卡伦鲍厄)相模变换对各相数据进行解耦,并依据线路之间的潮流关系建立最小二乘优化模型对阻抗参数进行寻优,实现精准量测.最后通过实际算例验证了该方法有效可行,实现了对不同工况下低压供电线路阻抗参数的在线辨识,为供电线路运行状态评估提供了依据.

In order to solve the problem of accurate measurement on the parameters of low-voltage power supply lines,in this paper an intelligent measurement method of low-voltage power supply line impedance based on phase-to-mode conversion is proposed.And the least-squares optimization model is established to optimize the impedance parameters to achieve accurate measurement.Finally,the practical example verifies that the method is effective and feasible.The method realizes the online identification of the impedance parameters of the low-voltage power supply line under different working conditions,and provides a basis for the evaluation of the operation state of the power supply line.