With the continuous improvement of the level of power electronic equipment in the power grid,the PMU measuring device is more and more applied in the substation.It is particularly important to use PMU to evaluate the PQ in the power system.The study tests the PQ characteristics of the power system from the aspects of frequency,steady-state voltage,voltage unbalance and harmonics;and conducts PQ evaluation of 3 PMU units from different manufacturers.The results of the experiment show that the measurement error of PMU for frequency and steady-state voltage is smaller than the standard error.PMU data are suitable for some indicative steady-state PQ evaluation,but are not suitable for the measurement of unbalance voltage and high harmonic error.
维普
万方数据