引用本文: | 杨志超,吴奕,王坚,崔莉,蒋春容,朱海兵,葛乐.一种主变压器热点温度实时计算解析模型[J].电力自动化设备,2016,36(11): |
| YANG Zhichao,WU Yi,WANG Jian,CUI Li,JIANG Chunrong,ZHU Haibing,GE Le.Analytical model for real-time calculating hot-spot temperature of main transformer[J].Electric Power Automation Equipment,2016,36(11): |
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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 kV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。 |
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 |
DOI:10.16081/j.issn.1006-6047.2016.11.022 |
分类号:TM411 |
基金项目: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) |
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Analytical model for real-time calculating hot-spot temperature of main transformer |
YANG Zhichao1, WU Yi2, WANG Jian1, CUI Li1, JIANG Chunrong1, ZHU Haibing2, GE Le1
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1.Jiangsu Collaborative Innovation Center of Smart Distribution Network, Nanjing Institute of Technology, Nanjing 211167, China;2.State Grid Jiangsu Electric Power Company, Nanjing 210024, China
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Abstract: |
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 kV 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. |
Key words: electric transformers main transformer equivalent thermal circuit hot-spot temperature top-layer oil temperature winding time constant analytical model |