抽蓄机组“背靠背”起动过程电气暂态特性研究  

Research on electrical transient characteristics of pumped storage unit during“back to back”starting process

作　　者：泰荣 苏春循 夏自平 周大庆[2] 阚阚 陈会向[3] TAI Rong;SU Chunxun;XIA Ziping;ZHOU Daqing;KAN Kan;CHEN Huixiang(HubeiBailianhe Pumped Storage Power Station Co.,Ltd,Huanggang 438000,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China;College of Agricultural Science and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]湖北白莲河抽水蓄能有限公司,湖北黄冈438000 [2]河海大学能源与电气学院,江苏南京211100 [3]河海大学农业科学与工程学院,江苏南京211100

出　　处：《人民长江》2021年第6期172-178,共7页Yangtze River

基　　金：国网新源控股有限公司科技项目(525735190006)。

摘　　要：“背靠背”起动是抽水蓄能机组泵水方向的重要起动方式。基于白莲河抽水蓄能电站实际参数和MATLAB/Simulink平台,以拖动机转速变化作为输入参数建立了仿真数学模型,该模型考虑了发电机的起动转速、励磁电流的影响,用以探究“背靠背”起动过程中阻尼绕组的影响。仿真计算结果表明:①发电机起动转速增幅不宜超过正常起动发电机起动转速的13%,发电机外加励磁电流不应低于0.6倍空载励磁电流;②适当减小发电机起动转速、增大励磁电流有利于提高机组起动的成功率;③电机阻尼绕组在起动过程中会消耗掉一部分的母线电流并产生对电动机转速上升有阻碍作用的电磁力矩。“Back to back”starting is an important starting mode of pumped storage units in pumping direction.Based on the actual parameters of the Bailianhe Pumped Storage Power Station and MATLAB/Simulink platform,this paper establishes a simulation mathematical model with the speed change of the tractor as the input parameter.This model considers the effects of the starting speed and the excitation current of the generator to explore the influence of the damper winding during the back-to-back starting process.The simulation results show that the increase of starting speed of generator should not exceed 13%of the normal starting speed,and the external excitation current of the generator should not be less than 0.6 times of the no-load excitation current.Properly reducing the starting speed and increasing the excitation current are conducive to improving the starting power of the unit.The damping winding of the motor will consume a part of the bus current during the starting process and generate the electromagnetic torque that hinders the rise of engine speed.

关 键 词：背靠背起动 MATLAB 电机拖动 阻尼绕组 励磁电流 抽水蓄能机组 白莲河抽水蓄能电站 

分 类 号：TV743[水利工程—水利水电工程]