基于改良三比值法的变压器故障基本信度分配计算方法  

A caculation method for transformer fault basic probability assignment based on improved three-ratio method

作　　者：张卫华[1] 苑津莎[1] 王杉[2] 张珂[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]广西电网公司南宁供电局,广西南宁530031

出　　处：《电力系统保护与控制》2015年第7期115-121,共7页Power System Protection and Control

基　　金：国家自然科学基金项目(61302163);中央高校基本科研业务费专项资金(2014MS104)~~

摘　　要：为了解决三比值法诊断结果不能直接应用于故障基本信度分配函数的构造问题,提出一种基于空间插值的变压器故障基本信度分配计算方法。根据有限元法基本原理,在分析了三比值法定义的故障特征空间基础上,按照各故障特征区域在空间几何上的分布特征对整个空间进行离散化,最后利用空间插值得到整个空间连续的故障基本信度分配函数。所述方法能够满足基本信度分配函数的要求,且计算结果定量地反映了各种故障发生的可能性。通过实例计算,验证了该方法的正确性和工程实际应用的可行性。The diagnostic conclusions by three-ratio method cannot be directly applied to the construction of the basic probability assignment（BPA） function. In order to solve the problem, this paper proposes a calculation method for transformer fault BPA based on spatial interpolation. According to the basic principle of finite element method, the fault characteristic distribution of three-ratio codes in the spatial geometry is analyzed and the entire fault characteristic space is discretized, and finally the continuous BPA function of faults in the entire space is obtained using spatial interpolation.The method meets the requirements of BPA function, and its calculating result quantitatively reflects the probability of various faults. With examples calculation, the correctness and feasibility of this method in actual engineering projects are verified.

关 键 词：基本信度分配 变压器 故障诊断 空间插值 三比值法 

分 类 号：TM407[电气工程—电器]