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| Study on Low-Frequency Heating and Drying Method of UHVAC Transformer Based on Temperature Feedback of Winding Hot Spots |
| Du Zhiye1, Xiao Pai1, Hao Zhaoyang1, Duan Cihan2, Xie Qijia3 |
1. School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China;
2. Southern Power Grid Guangzhou Power Supply Company Guangzhou 510000 China;
3. State Grid Hubei Electric Power Research Institute Wuhan 430077 China |
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Abstract The oil temperature of the UHV transformer after being heated and dried on site will affect the insulation safety of the transformer. To solve the problem of low efficiency of traditional hot oil circulation method in heating UHV transformer in low temperature area, in this paper, the fluid-temperature coupling numerical model of typical UHVAC transformer was established and the temperature rise law of 1 000kV UHVAC transformer hot oil circulating heating and low frequency heating was analyzed. The transformer heating and drying method based on low frequency heating winding hot spot temperature feedback to determine the reasonable opening time of radiator oil pump was proposed. The feasibility of the simulation model and algorithm was verified through the temperature rise test. The results show that the heating time can be reduced greatly by low frequency heating combined with radiator hot oil circulation technology at the time of 7h with opening the radiator oil pump and the heating efficiency can be increased. The results can provide a new solution for heating and drying of UHVAC transformer in low-temperature area.
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Received: 01 June 2021
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[1] 张丙旭, 张喜乐, 高扬, 等. 1000kV特高压变压器现场组装工艺研究[J]. 变压器, 2016, 53(7): 25-28.
Zhang Bingxu, Zhang Xile, Gao Yang, et al.Research on site assembly technology for 1000kV UHV transformer[J]. Transformer, 2016, 53(7): 25-28.
[2] García D F, García B, Burgos J C.Analysis of the influence of low-frequency heating on transformer drying - Part 1: theoretical analysis[J]. International Journal of Electrical Power & Energy Systems, 2012, 38(1): 84-89.
[3] 刘骥, 张明泽, 赵春明, 等. 基于频域介电响应分频段优化计算的变压器油纸绝缘老化参数定量计算方法[J]. 电工技术学报, 2020, 35(9): 2020-2031.
Liu Ji, Zhang Mingze, Zhao Chunming, et al.Quantitative calculation method of transformer oil-paper insulation aging parameters based on frequency dielectric spectrum frequency range optimized calculation[J]. Transactions of China Electrotechnical Society, 2020, 35(9): 2020-2031.
[4] 杨帆, 池骋, 刘刚, 等. 计及温度-电场强度非线性的换流变压器瞬态电场影响分析[J]. 电工技术学报, 2020, 35(23): 4971-4979.
Yang Fan, Chi Cheng, Liu Gang, et al.Study on transient insulation condition of converter transformer based on nonlinearity between temperature and electric field[J]. Transactions of China Electrotechnical Society, 2020, 35(23): 4971-4979.
[5] 官澜, 李博, 刘锐, 等. 特高压换流变压器低频电流短路法现场加热装置研制及应用[J]. 中国电机工程学报, 2014, 34(36): 6585-6591.
Guan Lan, Li Bo, Liu Rui, et al.Development and application of low frequency short-circuit current on-site heating device for the UHV converter transformer[J]. Proceedings of the CSEE, 2014, 34(36): 6585-6591.
[6] 阳少军, 牛保红, 吕家圣. ±500kV天广直流换流变故障的分析与处理[J]. 高电压技术, 2006, 32(9): 165-167.
Yang Shaojun, Niu Baohong, Lü Jiasheng.Analysis of accident of the converter transformer of Tian-Guang HVDC project[J]. High Voltage Engineering, 2006, 32(9): 165-167.
[7] 刘锐, 李金忠, 张书琦, 等. 大型变压器现场加热干燥方法的研究与应用[J]. 中国电机工程学报, 2012, 32(1): 193-198.
Liu Rui, Li Jinzhong, Zhang Shuqi, et al.Study on the on-site heating method for large-scale power transformers[J]. Proceedings of the CSEE, 2012, 32(1): 193-198.
[8] 黄国强, 李良书, 李为, 等. 绕组低频加热技术在变压器现场绝缘受潮处理中的应用[J]. 陕西电力, 2014, 42(4): 49-52, 60.
Huang Guoqiang, Li Liangshu, Li Wei, et al.Application of winding low frequency heating technology in the treatment of damped transformer insulation at site[J]. Shaanxi Electric Power, 2014, 42(4): 49-52, 60.
[9] Naimi M, Farhangi S, Ghaemi R.Thermal model and temperature control of a 30 MVA distribution transformer applied in low frequency drying process[C]//CCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH37436), Montreal, QC, Canada, 2003: 539-542.
[10] Bosiger J.The use of low frequency heating techniques in the insulation drying process for liquid filled small power transformers[C]//2001 IEEE/PES Transmission and Distribution Conference and Exposition, Developing New Perspectives (Cat. No.01CH37294), Atlanta, GA, USA, 2001: 688-692.
[11] 黄国强, 李良书, 李为, 等. 变压器现场绕组低频加热技术及装置研制[J]. 陕西电力, 2013, 41(12): 89-93, 98.
Huang Guoqiang, Li Liangshu, Li Wei, et al.Low frequency heating technology and device development for transformer coil in short-circuit[J]. Shaanxi Electric Power, 2013, 41(12): 89-93, 98.
[12] 沈恒毅, 葛袁, 韩书印. 大容量电力变压器现场干燥方法研究[J]. 高压电器, 2017, 53(9): 171-175.
Shen Hengyi, Ge Yuan, Han Shuyin.Research on site drying method of large capacity power transformer[J]. High Voltage Apparatus, 2017, 53(9): 171-175.
[13] 谢齐家, 汪涛, 高得力, 等. 基于方波调制的换流变压器低频加热电源研制[J]. 湖北电力, 2015, 39(2): 16-20.
Xie Qijia, Wang Tao, Gao Deli, et al.Research and development of converter transformer low frequency heating system based on square-waveform modulation[J]. Hubei Electric Power, 2015, 39(2): 16-20.
[14] 朱小帆, 查晓明, 秦亮, 等. 基于无源性控制的变压器低频加热电源[J]. 电力自动化设备, 2015, 35(6): 166-171.
Zhu Xiaofan, Zha Xiaoming, Qin Liang, et al.Low-frequency transformer heating source based on passivity control[J]. Electric Power Automation Equipment, 2015, 35(6): 166-171.
[15] 李飞, 张静, 程林, 等. 适用于寒冷地区的变压器低频短路电流加热干燥方法研究[J]. 黑龙江电力, 2018, 40(5): 438-442.
Li Fei, Zhang Jing, Cheng Lin, et al.Study on low frequency short-circuit current heating and drying method for on-site transformer in cold areas[J]. Heilongjiang Electric Power, 2018, 40(5): 438-442.
[16] 谢裕清, 李琳, 宋雅吾, 等. 油浸式电力变压器绕组温升的多物理场耦合计算方法[J]. 中国电机工程学报, 2016, 36(21): 5957-5965, 6040.
Xie Yuqing, Li Lin, Song Yawu, et al.Multi-physical field coupled method for temperature rise of winding in oil-immersed power transformer[J]. Proceedings of the CSEE, 2016, 36(21): 5957-5965, 6040.
[17] 李永建, 闫鑫笑, 张长庚, 等. 基于磁-热-流耦合模型的变压器损耗计算和热点预测[J]. 电工技术学报, 2020, 35(21): 4483-4491.
Li Yongjian, Yan Xinxiao, Zhang Changgeng, et al.Numerical prediction of losses and local overheating in transformer windings based on magnetic-thermal-fluid model[J]. Transactions of China Electrotechnical Society, 2020, 35(21): 4483-4491.
[18] 曾非同, 关向雨, 黄以政, 等. 基于多尺度多物理场的油浸式变压器流动-传热数值研究[J]. 电工技术学报, 2020, 35(16): 3436-3444.
Zeng Feitong, Guan Xiangyu, Huang Yizheng, et al.Numerical study on flow-heat transfer of oil-immersed transformer based on multiple-scale and multiple-physical fields[J]. Transactions of China Electrotechnical Society, 2020, 35(16): 3436-3444.
[19] 陶文铨. 数值传热学[M]. 2版. 西安: 西安交通大学出版社, 2001.
[20] 王泽忠, 李明洋, 宣梦真, 等. 单相四柱式变压器直流偏磁下的温升试验及仿真分析[J]. 电工技术学报, 2021, 36(5): 1006-1013.
Wang Zezhong, Li Mingyang, Xuan Mengzhen, et al.Temperature rise test and simulation of single-phase four-column transformer under DC-bias[J]. Transactions of China Electrotechnical Society, 2021, 36(5): 1006-1013.
[21] 梁敏. 大型油浸式变压器温度场计算与失效模型研究[D]. 北京: 华北电力大学, 2014.
[22] 李龙女. 自然油循环变压器的油流分布与温度场研究[D]. 沈阳: 沈阳工业大学, 2016.
[23] 陈彬, 李琳, 赵志斌. 双向全桥DC-DC变换器中大容量高频变压器绕组与磁心损耗计算[J]. 电工技术学报, 2017, 32(22): 123-133.
Chen Bin, Li Lin, Zhao Zhibin.Calculation of high-power high-frequency transformer's copper loss and magnetic core loss in dual-active-bridge DC-DC converter[J]. Transactions of China Electrotechnical Society, 2017, 32(22): 123-133.
[24] 吕家圣, 曾宪刚, 黄徐, 等. ±500kV换流变压器现场干燥处理技术应用[J]. 高电压技术, 2007, 33(10): 222-223.
[25] 翟茜. 大型变压器片式散热器散热效率分析与研究[D]. 沈阳: 沈阳工业大学, 2019.
[26] 国家质量监督检验检疫总局, 中国国家标准化管理委员会. 电气绝缘耐热性分级: GB/T 11021—2007[S]. 北京: 中国标准出版社, 2008. |
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2022, Vol. 37 
