考虑负载率的电磁环网供电可靠性评估方法  

Probability assessment method for supply systems with electromagnetic looped networks considering load ratel

作　　者：刘树安 吴杰康[2] 郑风雷 晏浩然 黄强 

机构地区：[1]广东电网有限责任公司东莞供电局,广东东莞523008 [2]广东工业大学自动化学院,广州510006

出　　处：《黑龙江电力》2016年第3期200-203,213,共5页Heilongjiang Electric Power

基　　金：国家自然科学基金项目(50767001);国家863高技术基金项目(2007AA04Z197);高等学校博士学科点专项科研基金资助项目(20094501110002);广东自然科学基金项目(S2013010012431;2014A030313509)

摘　　要：针对多电压等级电网中电磁环网对供电可靠性的影响问题,构建了多级电磁环网运行和联络线负载概率模型;根据负荷变化的不确定特性,在一定的负荷水平下,对电磁环网中进线及联络线负载率和过负荷率进行了关联分析,并提出电磁环网进线和联络线过负荷概率计算方法。以某一大型电网2个220kV变电站所形成电磁环网为例,计算分析了各种运行方式下进线和联络线过负荷概率,揭示了电磁环网运行对供电可靠性的影响。In the light of the study of the influence of electromagnetic looped networks on the reliability of power supply is studied,and the calculation method for overload rate of in- lines connected to the Infinite systems and tie- lines between substations is studied in this paper. According to the connection between two or more 220 k V substations,the model of the overload probability model of the in- lines and the tie- lines is analyzed. According to the uncertainty of load variation,the correlation analysis between the load rate and the overload rate of the electromagnetic looped networks is carried out under a certain load level. The reliability calculation method of overload rate of the in- lines and tie- lines in electromagnetic looped networks between substations is presented. In this paper,an electromagnetic loop network between two 220 k V substations in a large power grid is taken as a study example. The calculation and analysis of the overload probability of the in- lines and the tie- lines under various operating modes are carried out. The influence of operation of electromagnetic loop networks on power supply reliability is revealed.

关 键 词：电磁环网 可靠性评估方法 负载率 进线 联络线 

分 类 号：TM714[电气工程—电力系统及自动化]