电力系统静态电压稳定临界点的快速计算方法  

Fast Calculation Method for Critical Point of Static Voltage Stability in Power System

作　　者：黎晓 刘崇茹 蔡晖 辛蜀骏 郑乐 LI Xiao;LIU Chongru;CAI Hui;XIN Shujun;ZHENG Le(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China;State Grid Jiangsu Economic Research Institute,Nanjing 210008,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]国网江苏省电力有限公司经济技术研究院,江苏南京210008 [3]国网经济技术研究院有限公司,北京102209

出　　处：《华北电力大学学报（自然科学版）》2022年第3期44-54,共11页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家电网有限公司科技项目(5105-202018129A-0-0-00).

摘　　要：静态电压稳定临界点能够为电压稳定评估和控制措施提供重要信息,为此,提出了一种快速计算静态电压临界点的方法,包括鞍结型分岔点和极限诱导分岔点。首先提出了一种线性特性较好的鞍结型分岔点逼近指标,然后利用大步长的连续潮流方法逼近临界点,检测极限诱导分岔,同时通过鞍结型分岔点逼近指标判断潮流解逼近鞍结型分岔点的程度。当满足切换条件时,从连续潮流法切换为直接法,为直接法提供了较好的计算初值,能够快速准确地计算分岔点。算例结果表明,较之连续潮流法,所提方法具有更高的计算效率。此方法避免了连续潮流法在鞍结型分岔点附近校正环节计算量较大的问题,同时也解决了分岔点直接计算方法在离鞍结型分岔点较远时的收敛问题,兼顾了连续潮流法和分岔点直接法两者的优点,具有精度和速度的双重优势,具有在线应用的潜力。The critical point of static voltage stability can provide important information for voltage stability evaluation and control measures.Therefore,we propose a method which includes saddle-node bifurcation point and limit-induced bifurcation point to quickly calculate the static voltage critical point.Firstly,a saddle-node bifurcation point approximation index with good linear characteristics was proposed,and then the large-step CPF(Continuation Power Flow)method was used to approach the critical point to detect the limit-induced bifurcation.At the same time,the saddle-node bifurcation point approximation index was used to judge the degree of power flow solution approaching the saddle-node bifurcation point.When the switching conditions were met,the CPF method was switched to the PoC(Point of Collapse)method,which provides a good initial value for the PoC method to calculate the bifurcation point quickly and accurately.The results show that the proposed method has higher computational efficiency than the CPF.This method avoids a large amount of calculation of the correction in the CPF method near the saddle-node bifurcation point,and also solves the convergence problem of the PoC method when it is far from the saddle-node bifurcation point.Taking into account the advantages of the CPF method and the PoC method,this method has the dual advantages of accuracy and speed,and the potential of online application.

关 键 词：电压稳定 连续潮流 直接法 鞍结型分岔点逼近指标 鞍结型分岔 极限诱导分岔 海森矩阵 

分 类 号：TM732[电气工程—电力系统及自动化]