华电技术 ›› 2014, Vol. 36 ›› Issue (6): 22-25.

• 研究与开发 • 上一篇    下一篇

阳城电厂送出线路电压异常波动原因分析

  

  1. (1.国网电科院北京国电通公司,北京〓100070; 2.国家电力调度通信中心,北京〓100031)
  • 出版日期:2014-06-25

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

  1. (1.Beijing Guodiantong Network Technology Company Limited, Beijing 100070, China; 2.National Electric Power Dispatching and Communication Centre, Beijing 100031, China)
  • Published:2014-06-25

摘要: 摘要:在阳城电厂送出系统中,线路电压存在0.3~1.5Hz的等幅波动。通过研究分析,发现线路电压幅值异常波动的原因是系统存在的47次、49次谐波含量偏高,而同步相量测量装置(PMU)采样点不够、适应性不强。通过对PMU软件程序升级,消除了异常波动现象。理论仿真和现场实践都证明了其有效性,可为实际电力系统运行与监视、PMU曲线异常波动分析等提供参考。

关键词: 关键词:线路电压, 异常波动, 同步相量测量装置, 谐波

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