摘要
针对现有短路电流计算使用边界条件不同,负荷模型比例分配不一致造成计算结果存在较大差异的问题,以蒙东电网为对象,根据蒙东地区电网结构及负荷模型调研结果,建立相关区域典型电磁暂态负荷模型,求取适用于短路电流计算的负荷模型及比例。仿真计算结果表明,接入配电网的感应电动机对220kV以上的输电网的短路电流水平影响较大,且现有的短路电流计算结果与实际差异较大,影响电力系统的经济运行。因此,建议短路电流计算中考虑感应电动机对短路电流的影响,选取适当的负荷模型及比例,以提高短路电流计算分析水平。
Aiming at the problem of significant differences in calculation results caused by different boundary conditions and inconsistent load model proportions used in existing short circuit current calculations,taking the power grid in eastern Inner Mongolia as the object,according to the survey results of the power grid structure and load model in eastern Inner Mongolia,a typical electromagnetic transient load model for the relevant area is established to obtain the load model and proportion suitable for short circuit current caleulation.The simulation calculation results show that the induction motor connected to the distribution network has a great impact on the short circuit current level of the transmission network above 220 kV,and the existing short circuit current calculation results are quite different from the actual situation,which affects the economic operation of the power system.Therefore,it is suggested to consider the influence of induction motor on short circuit current in the calculation of short circuit current,select appropriate load model and proportion,and improve the calculation and analysis level of short circuit current.
作者
赵振宇
郑博文
杨朋威
任正
ZHAO Zhenyu;ZHENG Bowen;YANG Pengwei;REN Zheng(State Grid Inner Mongolia East Electric Power Co.Ltd.,Electric Power Science Research Institute,Hohhot 010010,China)
出处
《内蒙古电力技术》
2025年第3期69-74,共6页
Inner Mongolia Electric Power
基金
国家电网公司科技项目“提升特高压直流输电能力的运行控制技术”(526604210004)
关键词
蒙东电网
感应电动机
短路电流
负荷模型
电磁暂态
eastern Inner Mongolia power grid
induction motor
short circuit current
load model
electromagnetic transient
作者简介
赵振宇(1994),男,内蒙古人,硕士,工程师,从事电力系统分析工作。E-mail:zhaozhenyu@md.sgc.com.cn。
