一种关于静态电压稳定极限的工程改进计算方法  

An improved engineering calculation method of static voltage stability limit

作　　者：赵瑞[1] 苑画舫[1] 杨俊炜 张岩 张文朝 常乾坤 董楠[1] ZHAO Rui;YUAN Huafang;YANG Junwei;ZHANG Yan;ZHANG Wenchao;CHANG Qiankun;DONG Nan(State Grid Beijing Electric Power Company,Beijing 100031,China;Nanjing NARI Group Corporation,Nanjing 211000,China;Electric Power Science Research Institute of Beijing Electric Power Company,Beijing 100075,China)

机构地区：[1]国网北京市电力公司,北京100031 [2]南京南瑞集团有限公司,江苏南京211000 [3]国网北京市电力公司电力科学研究院,北京100075

出　　处：《电力科学与技术学报》2020年第4期181-186,共6页Journal of Electric Power Science And Technology

摘　　要：基于视在功率推导的静态电压稳定极限解析表达式,给出判别静态电压稳定薄弱点的指标,并提出一种关于静态电压稳定极限的工程改进计算方法。工程中主要采用电力系统仿真软件来计算静态电压稳定。该方法在稳定计算程序中模拟负荷增长,解决普通潮流算法中存在的静态电压稳定极限附近运行点潮流不易收敛造成的极限误判问题;在潮流计算程序中将区域内发电机PV节点修改为PQ节点,解决稳定计算程序由于计及发电机动态调节特性造成的无功出力超发问题。最后,以北京某分区电网为例,验证该计算方法的适应性。Based on the analytical expression of the static voltage stability limit derived from apparent power,this paper gives an index to identify the weak point of static voltage stability,and proposes an improved engineering calculation method for the static voltage stability limit.The power system simulation software is mainly used in the project to calculate the static voltage stability.This method simulates the load growth in the stability calculation program,and solves the problem of limit misjudgment caused by the difficulty of the convergence of the operating point near the static voltage stability limit in the ordinary power flow algorithm.In the power flow calculation program,the PV node of the generator in the region is modified to a PQ node,which solves the problem of excessive output of reactive power caused by the dynamic calculation characteristic of the generator in the stable calculation program.Finally,a certain district power grid in Beijing is used as an example to verify the adaptability of the calculation method.

关 键 词：电力系统 视在功率传输 静态电压稳定薄弱点 静态电压稳定极限 

分 类 号：TM712[电气工程—电力系统及自动化]