基于测量值波动特性的PMU测量性能在线评价方法

发布时间：2018-03-27 12:33

本文选题：相量测量算法　切入点：相量测量单元　出处：《电网技术》2017年07期

【摘要】：由于不良数据会导致电力系统发生错误的动作,对相量测量单元(phasor measurement unit,PMU)的相量测量精度进行在线评价对于广域监控系统至关重要。基于相量测量值变化量的波动特性,提出一种PMU测量性能在线评价方法。首先分析了相量测量值变化量的波动特性与算法性能之间的关系,然后将量化波动幅度的标准差定义为波动指数来评价测量值的精度水平,并通过相邻的相量测量值实时地计算波动指数。最后,在频率线性变化、低频振荡及噪声干扰等动态工况下,利用不同的相量测量算法,对所提方法进行测试,其结果表明:在大多数情况下波动指数与综合矢量误差(total vector error,TVE)的变化趋势保持一致。此外,该方法产生的运算量满足在线评价应用的需求。
[Abstract]:Because bad data can lead to wrong operation of power system, it is very important to evaluate the phasor measurement unit's phasor measurement accuracy online for wide area monitoring system. Based on the fluctuation characteristic of phasor measurement value, An on-line evaluation method of PMU measurement performance is proposed. Firstly, the relationship between fluctuation characteristics of phasor measurement values and the performance of the algorithm is analyzed, and then the standard deviation of quantized fluctuation amplitude is defined as the fluctuation index to evaluate the accuracy level of the measured values. The fluctuation index is calculated in real time by the adjacent phasor measurements. Finally, under the dynamic conditions of frequency linear variation, low frequency oscillation and noise interference, the proposed method is tested by using different phasor measurement algorithms. The results show that the variation trend of the volatility index is consistent with that of the total vector error (TVEV) in most cases. In addition, the computational complexity generated by this method meets the requirements of on-line evaluation applications.
【作者单位】：西南交通大学电气工程学院;
【基金】：国家自然科学青年基金(51407150) 中央高校基本科研业务费专项资金资助(2682015CX028)~~
【分类号】：TM930

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