基于能量函数法的电网脆弱性评估  

Power Grid Vulnerability Assessment Based on Energy Function

作　　者：卢锦玲[1] 姬群星[1] 朱永利[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《电网技术》2008年第7期30-33,45,共5页Power System Technology

基　　金：国家自然科学基金资助项目(60574037)~~

摘　　要：传统确定性电力系统安全评估方法难以考虑电力系统的随机性,难以实时、定量和直观地提供电网安全健康状态的诊断信息。文章引入了电网脆弱性的概念,拓展了传统的电力系统安全性概念,并考虑预想事故发生的概率,采用暂态能量函数法从暂态安全角度定量评估了电力系统的脆弱性,给出了电力系统的脆弱性指标和阈值。算例分析结果表明该方法在保证安全分析结果正确性的同时节省了机时,验证了该方法的合理性与有效性。It is difficult for traditional certainty assessment method of power system security to consider the randomness of power system, so it is also difficult to offer real-time, quantitative and visual diagno4sis information of security and health status of power system. Introducing the concept of power system vulnerability the authors extend traditional concept of power system security; considering the occurrence probability of contingency, by use of transient energy function the vulnerability of power system is quantitatively assessed in the viewpoint of transient security, and the index and threshold value of power system vulnerability are given. Results of calculation example analysis validate the rationality and effectiveness of the proposed method; meanwhile, these results also show that the proposed method can ensure the correctness security analysis while the computing time is saved.

关 键 词：暂态能量函数 电网脆弱性 脆弱性指标 阈值 

分 类 号：TM743[电气工程—电力系统及自动化]