一种主变压器热点温度实时计算解析模型  

Analytical model for real-time calculating hot-spot temperature of main transformer

作　　者：杨志超[1] 吴奕 王坚[1] 崔莉[1] 蒋春容[1] 朱海兵 葛乐[1] YANG Zhichao WU yi WANG Jian CUI Li JIANG Chunrong ZHU Haibing GE Le(Jiangsu Collaborative Innovation Center of Smart Distribution Network,Nanjing Institute of Technology, Nanjing 211167, China State Grid Jiangsu Electric Power Company, Nanjing 210024, China)

机构地区：[1]南京工程学院江苏省配电网智能技术与装备协同创新中心,江苏南京211167 [2]国网江苏省电力公司,江苏南京210024

出　　处：《电力自动化设备》2016年第11期147-151,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51247005);江苏省科技厅产学研前瞻性项目(BY2016008-05);江苏省电力公司2015年科研项目(J2015005);南京工程学院创新基金资助项目(CKJA201408)~~

摘　　要：基于油浸式变压器的顶层油温-绕组等效热路,提出了一种主变压器绕组热点温度的解析模型,该模型能够根据当前采集的主变负载系数和顶层油温数据,实时计算热点温度。相应提出了绕组时间常数的确定方案。通过对某334 MV·A/500 k V主变压器进行实例计算与分析,并将结果与通过GB/T 15164—1994标准中的热点温度计算公式计算的结果进行比较,验证了所提出热点温度模型及计算方法的有效性和正确性,同时指出了GB/T 15164—1994标准中热点温度计算公式存在的缺陷。An analytical model based on the equivalent thermal circuit of top-layer oil and winding is proposed,which calculates the hot-spot temperature of oil-immersed main transformer in real time according to the acquired data of its load factor and top oil temperature. A corresponding scheme for determining the winding time-constant is also proposed. Case calculation and analysis are carried out for a 334 MV·A / 500 k V main transformer and the results are compared with those by the hot-spot temperature calculation formula of GB / T 15164-1994,which show the effectiveness and accuracy of the proposed model and scheme. The defect of the hot-spot temperature formula of GB / T 15164-1994 is pointed out.

关 键 词：变压器 主变压器 等效热路 热点温度 顶层油温 绕组时间常数 解析模型 

分 类 号：TM411[电气工程—电器]