运行风险评估中缺乏历史统计数据时的元件停运模型  

Component Outage Modeling Method for Operation Risk Assessment With Limited Power Components' Failure Data

作　　者：宁辽逸[1] 吴文传[1] 张伯明[1] 李想[2] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]清华大学数学科学系,北京市海淀区100084

出　　处：《中国电机工程学报》2009年第25期26-31,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2004CB217908);国家自然科学基金项目(50707013)~~

摘　　要：缺乏历史故障统计数据是电力系统运行风险评估中的突出难题。以架空线路为例,用模糊变量表示难以用统计数据得到的线路故障率,利用人工经验给出故障率的隶属度函数。然后基于随机过程和可信性理论,建立线路的状态模糊概率的计算方法。进一步,提出采用可信性的模糊模拟来计算线路风险指标(亦为模糊变量)期望值、乐观/悲观值的方法,用于在线风险决策。算例证明了所提方法的可行性和科学性,将为数据缺乏问题提供一条解决途径。Absence of statistical components＇ failure data is a great challenge for power system operation risk assessment. A fuzzy and random model was developed to overcome this challenge in this paper. Firstly, fuzzy variable was used to describe fault rate of line, whose membership function can be given according to the limited statistical data combined with experts＇ experience. Secondly, a method was presented to calculate line＇s fuzzy state probability, which is based on random process algorithm and credible theory. Lastly, an algorithm to calculate the expect value, optimistic and pessimistic value of the line risk index （fuzzy variable） was proposed for decision-making. Numerical tests prove the method feasible and practical.

关 键 词：电力系统 运行风险评估 故障率 模糊变量 可信性理论 

分 类 号：TM71[电气工程—电力系统及自动化]