基于PMU量测信息的短线路同杆并架双回线参数辨识

由于短线路同杆并架双回线越来越多，如何获得其准确的参数是亟待解决的问题。提出了基于PMU的短线路同杆并架双回线参数估计新方法。基于导体之间的耦合首先推导了短线路同杆并架双回线的阻抗模型；利用PMU在线实测数据提出了相应的短线路相角矫正方法和基于最小二乘法的短线路同杆并架双回线参数估计算法。该模型完整，算法直观简单，能够准确、快速地算得短线路同杆并架双回线之间的所有自感及互感参数。算例证明了该方法的有效性和正确性。

Parameter Identification of Short Parallel Double-Circuit Lines Based on PMU Measurements

With the continuous increasing of short parallel double-circuit lines, it is an urgent problem to obtain their accurate parameters. In this paper, a new PMU-based method is proposed to estimate the parameters of short parallel double-circuit lines. Firstly, based on the coupling between conductors, the impedance model of short parallel double-circuit lines is deduced. And then, the corresponding short line phase angle correction method and the parameter estimation algorithm of short parallel double-circuit lines based on least square method are presented using the online PMU measurement data. The proposed model is complete, and the algorithm is simple and straightforward, which can accurately and quickly calculate all the parameters of short parallel double-lines. Case study has validated the effectiveness and correctness of the proposed method.