新能源电网电压波动下同步调相机失磁运行能力研究  

Operation Ability of Synchronous Condenser After Loss of Field Under Voltage Fluctuation of Renewable Power Grid

作　　者：张爱军 李丹丹 刘小恺 慕腾 许国瑞[2] 赵越 郭琪 ZHANG Aijun;LI Dandan;LIU Xiaokai;MU Teng;XU Guorui;ZHAO Yue;GUO Qi(Inner Mongolia Power Research Institute,Hohhot 010020,China;School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,内蒙古呼和浩特010020 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《智慧电力》2024年第6期71-76,115,共7页Smart Power

基　　金：国家重点研发计划资助项目(2023YFB2405900);内蒙古电力(集团)有限责任公司科技项目(2023-5-29)。

摘　　要：同步调相机(SC)较强的无功支撑能力可有效提升新能源电网的电压稳定性,但实际运行中励磁系统故障引起的调相机失磁可能导致其转子失步,影响电网安全运行。为了研究新能源电网不同电压下同步调相机失磁后保持同步运行的能力,建立了300Mvar调相机的时步有限元模型,研究了励磁绕组开路和短路故障下同步调相机的失磁运行特性,对比分析了励磁绕组不同失磁故障下同步调相机各电气量的差异;在此基础上,研究了新能源电网不同电压下同步调相机失磁运行特性,揭示了同步调相机失磁运行能力随初始无功功率的变化规律。结果表明,随着同步调相机初始无功功率的增加,其失磁后保持同步运行所需的系统电压会逐渐增加。The stronger reactive power support ability of synchronous regulator can effectively improve voltage stability of renewable power grid.However,the synchronous condenser may be out of step after loss of field caused by the excitation system fault in actual operation,which will affect the safe operation of the power grid.In order to study the operation ability of synchronous condenser after loss of field under the different voltage of renewable power grid,the time-step finite element model of 300 Mvar synchronous condenser is established and its operation characteristics are calculated under the loss of field caused by the open-circuit and short-circuit fault of field winding.The differences of synchronous condenser electrical quantities under different excitation winding after loss of field are compared and analyzed.On this basis,the operation characteristic of synchronous condenser after loss of field is studied under the different voltages of renewable power grid,and the variation law of synchronous condenser operation ability after loss of field along with the initial reactive power is revealed.The results show that the system voltage required to maintain synchronous operation is increased along with the increase of the initial reactive power of synchronous condenser.

关 键 词：新能源电网电压波动 同步调相机 励磁故障 失磁运行能力 

分 类 号：TM342[电气工程—电机]