外部条件相关的无功设备时变停运模型  

Time-varying outage model related to external conditions for reactive devices

作　　者：李彦柳[1] 翁慧颖[1,2] 张金江[1] 郭创新[1] 周恒俊[3] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]丽水电业局,浙江丽水323000 [3]南京供电公司,江苏南京210000

出　　处：《电力系统保护与控制》2012年第17期105-109,共5页Power System Protection and Control

基　　金：国家自然科学基金(51177143);浙江省自然科学基金资助(Y1100243);教育部博士点基金(20090101110058)~~

摘　　要：无功水平直接影响电力系统可靠性分析,确定无功水平的首要任务是建立无功相关设备的停运模型。以电容器设备为研究对象,针对温度和电压两个重要影响因素,建立了受运行条件影响的设备绝缘寿命模型。利用绝缘寿命模型修正Weibull老化模型,得到随运行条件改变而时变的设备停运模型。通过仿真计算对比所建模型与传统模型在不同温度和电压水平下得到的设备失效水平,验证了模型的合理性和有效性。该模型可以用于电力系统运行的风险评估,帮助决策者在运行规划中作出合理决策。Reactive power influences power system reliability analysis directly. The primary task of deciding reactive power is to establish outage model of reactive power devices. Capacitors are studied in this paper and its insulation lifetime model is established considering two important elements of temperature and voltage. Time-varing outage model can be obtained by revising Weibull aging model with the insulation life model. The failure probabilities influenced by different temperature and voltage are calculated using both the modified model and the traditional model. The rationality and effectiveness of this model is proved by comparing the results. This model can be applied to operational risk assessment to help operators make right decisions.

关 键 词：电容器 停运模型 条件 温度 电压 风险评估 

分 类 号：TM732[电气工程—电力系统及自动化]