Static Security Assessment of Large Power Systems Under N-1-1 Contingency

P. Prabhakar, R. Krishan, D. Pullaguram
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Abstract

Contingency analysis (CA) is one of the critical tools of a static security assessment (SSA). It is used to forecast the operating states of a power system under one or more outages of generators, transmission lines, transformers, etc. To perform SSA, repetitive load flow analyses are required for obtaining the bus voltages, bus injections, and line flows considering each possible outage. A repetitive load flow analysis demands huge computational efforts like efficient system modelling for faster load flow solutions, parallel programming and High performance computing (HPC). In this paper, an N-1-1 CA has been analysed using fast decoupled load flow (FDLF) with a strategy of screening and ranking the catastrophic contingencies. This paper explores a computationally efficient method to analyze the severity and the ranking of N-1-1 contingencies for large power system SSA. The performance of the FDLF based SSA method is demonstrated on two standard IEEE 14 and 118 bus systems.
n -1事故下大型电力系统静态安全评估
应急分析(CA)是静态安全评估(SSA)的关键工具之一。它用于预测发电机、输电线路、变压器等发生一次或多次故障时电力系统的运行状态。为了执行SSA,需要进行重复的负载流分析,以获得考虑到每次可能中断的母线电压、母线注入和线路流。重复的负荷流分析需要大量的计算工作,如高效的系统建模,以实现更快的负荷流解决方案,并行编程和高性能计算(HPC)。本文采用快速解耦负荷流(FDLF)对N-1-1 CA进行了分析,并采用了筛选和排序突变偶然性的策略。本文探索了一种计算效率高的方法来分析大型电力系统SSA N-1-1事故的严重程度和等级。在ieee14和ieee118两个标准总线系统上验证了基于FDLF的SSA方法的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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