电力系统分析综合程序连续潮流算法的改进  

Improvements of the Algorithms of Continuation Power Flow for PSASP

作　　者：杨小煜[1] 陈兴雷[1] 刘赫川 安宁[1] 周孝信[1] 

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院),北京市海淀区100192

出　　处：《电网技术》2017年第5期1554-1560,共7页Power System Technology

基　　金：国家电网公司科技项目资助(大规模交直流电网潮流收敛性改进方法及分析技术研究)~~

摘　　要：连续潮流计算是电力系统静态电压稳定分析的基本工具,目前国内多数连续潮流程序仍存在计算可靠性不高和计算效率低等问题。对电力系统分析综合程序(PSASP)中的连续潮流程序在提高计算可靠性和计算效率等方面进行了改进,使之能够适应大型电力系统的电压稳定性分析。改进后的PSASP连续潮流算法包含基本的拟弧长和局部参数化方法以及渐近数值方法(asymptotic numerical method,ANM)。ANM实质是一种采用高阶泰勒展开进行预测的连续方法,是一种半解析计算方法。ANM计算步长能够根据解曲线的形状自适应控制,因而是一种快速的连续潮流计算方法。实际电力系统的计算表明,修改后的连续潮流算法在计算可靠性和计算效率方面相比原来的程序有了很大程度提高,能够满足大型电力系统工程计算的需要。所做的研究对其他连续潮流的计算软件也会有一定的借鉴作用。Continuation power flow（CPF） program is a fundamental tool in steady voltage stability analysis. Low computational reliability and efficiency exist in several CPF programs in China. CPF program of PSASP has been improved with respect to computation reliability and efficiency to meet requirements for voltage stability analysis of large scale power systems. The improved algorithm contains basic continuation methods such as pseudo-arclength parameterization, local parameterization and newly developed asymptotic numerical method（ANM）. ANM can be considered as a semi-analytical continuation method based on computation of Taylor series expansion of nonlinear parameter-dependent system per step. It offers considerable advantages in terms of computational speed and adaptive step-length control. Examples of real power systems demonstrate the reliability and efficiency of CPF program of PSASP and it may be fit for large scale power system computation. Study of this paper is instructive to other CPF programs.

关 键 词：连续潮流 拟弧长参数化 局部参数化 渐近数值方法 自适应步长控制 高阶预测 

分 类 号：TM721[电气工程—电力系统及自动化]