电力系统线路过载的风险评估与预防控制  

Risk assessment and preventive control for power system overload

作　　者：陈为化[1] 罗龙[2] 

机构地区：[1]湖北省电力公司,湖北武汉430077 [2]杭州供电局,浙江杭州310018

出　　处：《华东电力》2008年第7期42-45,共4页East China Electric Power

摘　　要：提出了一种基于线路过载风险的电力系统评估与预防控制方法。该方法应用随机潮流和半不变量法分析了系统运行的不确定性以及造成的线路潮流的不确定性。采用严重度函数描述了线路潮流波动的影响与后果。在此基础上,以线路潮流波动的可能性与严重性的乘积作为线路过载的风险,建立了系统线路过载的风险指标,表征了系统的安全性。并且基于优化潮流和原对偶内点算法建立了线路过载风险预防控制模型,通过对系统控制变量的优化,有效地减少了系统的线路过载风险,提高了系统运行的安全性。在测试系统的计算结果表明了该算法的可行性。A method of power system security assessment and preventive control based on power system overload risks is proposed, which uses probabilistic power flow （PPF） and cumulant method to analyze the randomness of system statuses, and applies the severity function to describe the impact of transmission line load fluctuations. Based on that, overload risk is defined as the result of the probability multiplying the severity of transmission line overload and is considered as an indicator of power system security. A preventive control model, based on optimal power flow （OPF） and primal dual interior point method, was used to optimize the outputs of the system active and reactive resources. This reduces the system overload risks and increases the system security. Calculation results of the method in a test system prove the method effective.

关 键 词：过载风险 随机潮流 半不变量 优化潮流 

分 类 号：TM712[电气工程—电力系统及自动化]