配电网合环冲击电流精确算法  

Accurate Algorithm for Closing-loop Surge Current in Distribution Network

作　　者：吴艳娟[1] 王皓月 杨理 WU Yanjuan;WANG Haoyue;YANG Li(Tianjin Key Laboratory for Control Theory&Applications in Complicated Systems,Tianjin University of Technology,Tianjin 300384,China;Yongchuan Power Supply Branch,State Grid Chongqing Electric Power Company,Chongqing 402160,China)

机构地区：[1]天津理工大学天津市复杂系统控制理论及应用重点实验室,天津300384 [2]国网重庆市电力公司永川供电分公司,重庆402160

出　　处：《电力系统及其自动化学报》2020年第4期123-129,共7页Proceedings of the CSU-EPSA

基　　金：国网重庆市电力公司科学技术资助项目(SGTYHT/17-JS-199);天津市科技计划资助项目(18ZXYENC00100)。

摘　　要：针对配电网合环冲击电流问题,提出一种基于闭区间求解目标函数最大值的数学计算方法。首先,将配电网合环电路的物理模型转化为满足工程要求的数学模型;其次,针对数学模型在自变量的闭区间内找出函数的所有极值点;最后,通过极值点得到函数值域,值域的绝对值中最大值即为冲击电流最大值。所提算法结合拓扑搜索方法,实现合环回路中所有支路冲击电流的精确计算,对实际配电网的合环操作具有更加精确的指导作用。最后,在所开发的配电网合环分析平台上进行编程实现,并通过算例证明本文方法的正确性和可行性。Aimed at the problem of closing-loop surge current in distribution network,a mathematical calculation method based on closed interval is proposed to solve the maximum value of an objective function. Firstly,the physical model of the closing-loop circuit of distribution network is transformed into a mathematical model that meets engineering requirements. Secondly,all the extreme points of the function are found in the closed interval of the independent variable.Thirdly,the range of function value is obtained through the extreme point,and the maximum absolute value in this range is determined as the maximum surge current. Combined with the topological search method,the proposed algorithm realizes the accurate calculation of surge current in all branches in the closing-loop,providing more precise guidance for the closing-loop operation of actual distribution network. Finally,programming is realized on a self-developed distribution network closing-loop analysis platform,and the correctness and feasibility of the proposed method are verified by numerical examples.

关 键 词：配电网 合环 冲击电流 精确算法 

分 类 号：TM744[电气工程—电力系统及自动化]