Errors in voltage and current transformer and compensation algorithms may cause errors in local voltage and current phase angle measured by phasor measurement units (PMU), whose difference is defined as the power factor angle (PFA). Consequently, the error of local PMU voltage and current phase angle difference, i.e., power factor angle deviation (PFAD), can cause reactive power measurement deviation, which leads to reactive power measurement inconsistency of symmetrical double-circuit lines, deteriorating the application of dynamic monitoring. In this paper, a three-step correction method for PFAD of double-circuit lines is proposed based on the operation characteristics and reactive power of double-circuit lines:1) estimate the difference between PFADs of different lines at the same end; 2) estimate the difference of PFADs at both ends of one line of the double-circuit lines; 3) estimate the local PFAD. The method does not require line parameters and can realize the correction of PFAD at each end of the double circuit line. Finally, the effectiveness and robustness of the proposed method are demonstrated by the simulation results using both simulated and field data.

中文翻译：

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基于无功功率测量的双回线路 PMU 角度偏差检测与校正


电压和电流互感器以及补偿算法的误差可能会导致相量测量单元（PMU）测量的本地电压和电流相位角出现误差，其差值定义为功率因数角（PFA）。因此，本地PMU电压和电流相位角差的误差，即功率因数角偏差(PFAD)，会引起无功功率测量偏差，从而导致对称双回线路无功功率测量不一致，影响动态测量的应用。监控。本文根据双回线路的运行特性和无功功率，提出了双回线路PFAD的三步修正方法：1）估计同一端不同线路PFAD的差异； 2）估计双回线路中一根线路两端PFAD的差异； 3) 估计局部PFAD。该方法不需要线路参数，可以实现双回线路两端PFAD的校正。最后，使用模拟和现场数据的模拟结果证明了所提出方法的有效性和鲁棒性。