电网实际运行环境中相量测量装置性能在线评价方法

发布时间：2018-07-07 08:51

本文选题：电力系统 + 电力系统测量　；参考：《电力系统保护与控制》2015年06期

【摘要】：广域测量系统(WAMS)的各项应用功能的可靠性高度依赖于相量测量装置(PMU)的数据质量。目前,PMU性能评价主要在实验中离线进行,性能指标主要采用综合矢量误差(TVE)。TVE作为一种离线评价指标,并没有将频率测量误差考虑在内,并且只适合于在被测信号已知的情况下使用。随着PMU布点越来越普遍,迫切需要建立一种在电网实际运行环境下的在线评价PMU测量性能的综合指标。PMU的主要任务是真实地反映交流电压(电流)输入信号的频率、幅值、相位等相量特征,如果利用PMU输出的测量结果重新构造一个正弦信号,这一正弦信号与PMU输入信号之间的差别信号的频谱中应不包含PMU输出的信号频率。基于这一思路,提出了综合相量误差(TPE)作为PMU性能的在线评价指标。TPE的优点是不受噪声、谐波和动态变化分量的影响,能够在输入信号未知的情况下对PMU的测量性能进行评价。算例验证了该方法的有效性。
[Abstract]:The reliability of wide area measurement system (WAMS) applications is highly dependent on the data quality of the phasor measurement unit (PMU). At present, the performance evaluation of PMU is mainly carried out off-line in the experiment. The comprehensive vector error (TVE). TVE is used as an off-line evaluation index, and the frequency measurement error is not taken into account. And only suitable for use in cases where the measured signal is known. With the increasing popularity of PMU placement, it is urgent to establish a comprehensive index for on-line evaluation of PMU measurement performance in the actual operation environment. The main task of PMU is to truly reflect the frequency and amplitude of AC voltage (current) input signal. If a sinusoidal signal is reconstructed from the measured results of PMU, the frequency of the signal from the difference between the sinusoidal signal and the input signal of PMU should not be included in the spectrum of the phase equiphasor. Based on this idea, the advantage of comprehensive phasor error (TPE) as an online evaluation index of PMU performance. TPE is that it is not affected by noise, harmonic and dynamic change components, and can evaluate the measurement performance of PMU under unknown input signal. The effectiveness of the method is verified by an example.
【作者单位】：国家电网公司华北分部;国网冀北电力有限公司经济技术研究院;国网新源控股有限公司;
【基金】：国家电网公司科技项目资助(52011013508K)
【分类号】：TM732;TM933.31

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