区域电网电压暂降分析及评估方法研究

Analysis of Voltage Sag in Ｒegional Power Grid and Ｒesearch on Its Evaluation Method

摘要:

首先介绍了电压暂降的概念以及造成电压暂降的原因，并提出了敏感设备曲线的概念。根据绵阳某区域现 场实测数据，结合 PLECS 仿真分析造成该站点电压暂降的原因，进而选择合理的缓解措施对该变电站改善后的电压 暂降事件进行了预估计。最后，讨论了电压暂降事件在敏感设备曲线上的分布情况，给用户选择敏感设备提出了建 议。

Abstract:

Firstly，the concept of voltage sag and the cause of voltage sag are introduced，and the concept of sensitive device curve is put forward． According to the measured data in a field of Mianyang，the causes of voltage sags caused by the site are analyzed by PLECS simulation，and the reasonable mitigation measures are selected to estimate the voltage sags after the improved substation． Finally，the distribution of voltage sag events on the sensitive device curve is discussed，and the suggestions are proposed for users to select sensitive devices．