Analysis on reason of abnormal voltage fluctuation in output transmission line of Yangcheng Power Plant

Abstract

Abstract: Abstract:In the output transmission system of the Yangcheng Power Plant, the line voltage fluctuated in 0.3 to 1.5Hz with uniform amplitude. It was found by research and analysis that the reasons of the abnormal line voltage fluctuation are high content of 47 time and 49 time harmonics in the system, insufficient sampling points of the synchronous phasor measurement unit (PMU) and the poor adaptation of PMU. The software program of PMU was upgraded, and the abnormal line voltage fluctuation was eliminated. The effectiveness of the improvement measure was verified by theoretical simulation and site practice. The result in this paper provides reference for practical power system operation and monitoring and analysis on abnormal fluctuation of the PMU curve.

Key words: Keywords:line voltage, abnormal fluctuation, phasor measurement unit, harmonic

SUI Jiayin 1, LIANG Zhifeng 2. Analysis on reason of abnormal voltage fluctuation in output transmission line of Yangcheng Power Plant[J]. Huadian Technology, 2014, 36(6): 22-25.

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Analysis on reason of abnormal voltage fluctuation in output transmission line of Yangcheng Power Plant

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