测量误差对输电线路交流电阻辨识的影响分析

Analysis of Influence of Measurement Error on Identification of AC Resistance of Transmission Lines

为分析和判断测量误差对输电线路参数辨识结果准确性的影响,论文基于集中参数π型等值电路的输电线路参数辨识模型,通过建立灵敏度方程,分析了电气量测量回路整体测量误差对输电线路交流电阻参数辨识准确性的影响。基于实测的电气量数据,利用灵敏度分析方法,对电压幅值变化造成的输电线路交流电阻辨识不同结果进行了仿真分析。研究结果为输电线路在线参数辨识的准确性和可用性提供了评判依据。

In order to analyze and judge the influence of measurement errors on the accuracy of the transmission line parameter identification results,this paper is based on the transmission line parameter identification model of the centralized parameterπ-type equivalent circuit.By establishing the sensitivity equation,the overall measurement error of the electrical measurement loop is analyzed.The influence of AC resistance parameter identification accuracy.Based on the measured electrical quantity data,the sensitivity analysis method is used to simulate and analyze the different results of the AC resistance identification of the transmission line caused by the change of the voltage amplitude.The research results provide a basis for judging the accuracy and availability of the online parameter identification of transmission lines.