基于IMPMMS并网的新能源电压稳定性分析  

Voltage stability analysis of new energy based on IMPMMSgrid connection

作　　者：郑军铭 冯丽[2] 蔡志远[1] 张炳义[1] ZHENG Junming;FENG Li;CAI Zhiyuan;ZHANG Bingyi(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;School of Electrical Engineering,Shenyang Polytechnic College,Shenyang 110033,China)

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870 [2]沈阳职业技术学院电气工程学院,辽宁沈阳110033

出　　处：《电机与控制学报》2024年第3期66-74,共9页Electric Machines and Control

摘　　要：新能源并网比例过高导致新能源电网电压稳定性低和机组脱网风险,永磁发电机组(IMPMMS)对系统具有电压补偿能力,能满足新能源电网无功需求。本文根据永磁发电机组的结构和工作原理,分析了永磁发电机组的电压补偿机理,推导影响无功调节能力的参数。结合新能源通过永磁发电机组并网的状态方程,建立电力系统仿真模型,对比不同程度电压跌落下永磁发电机组与传统机组的电压补偿能力及电压隔离作用,最后研制一台缩比样机。仿真和试验结果表明:网侧电压跌落幅度越大,永磁发电机组电压补偿能力越强,且永磁发电机组机械隔离可以隔离故障对新能源机组的影响,有效防止新能源脱网风险的发生,提高新能源发电系统的电压稳定性。In view of the problem that the high proportion of new energy grid-connected leads to the voltage stability of the new energy grid and the risk of the unit being disconnected from the grid,the inertia motivity permanent magnet machine set(IMPMMS)has the voltage compensation capability for the system,which can meet the reactive power requirements of the new energy grid.According to the structure and working principle of the IMPMMS,the voltage compensation mechanism of the permanent magnet generator set was analyzed,and the influencing parameters that affect its reactive power regulation ability were deduced.Combined with the state equation of the new energy through the grid connection of the IMPMMS,the simulation model of the power system was established,and the voltage compensation capability and the voltage isolation effect of the IMPMMS and the traditional generator set under different degrees of voltage drop were compared,and finally a scaled prototype was developed.The simulation and test results show that the greater the voltage drop on the grid side,the stronger the voltage compensation capability of the IMPMMS,and the mechanical isolation of the IMPMMS can isolate the impact of the fault on the new energy generator set,prevent the risk of new energy off-grid and improve the voltage stability of the entire new energy power generation system.

关 键 词：高比例新能源 永磁发电机组 无功补偿能力 电压隔离 电压稳定性 

分 类 号：TM351[电气工程—电机] TM712