特高压换流变压器拉板损耗的频率特性分析

doi:10.19595/j.cnki.1000-6753.tces.210154

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Abstract Based on the three-dimensional quasi-static electromagnetic field equation and the characteristics of magnetic field intensity distribution on the flitch plate surface of converter transformer, the approximate mathematical expression of flitch plate loss is derived. Through the analysis of the formula, the variation law of the loss and the difference of the frequency index of the loss are obtained under different current frequencies when the flitch plate is fully slotted and without slotted. In order to verify the correctness of the theoretical analysis and further determine the actual frequency index value of the flitch plate loss calculation, the one-eighth finite element simulation calculation of the flitch plate loss of an 800kV single-phase four-column UHV converter transformer was carried out. The results show that the frequency index of the flitch plate loss decreases with the increase of current frequency, whether the flitch plate is slotted or not. However, the slotting of the flitch plate significantly reduces the fundamental loss and also increases the high-order harmonic loss, so the frequency index of the loss will be far greater than the value of the non-slotted, and 1.5 is advisable in the calculation of the actual load loss of the converter transformer. When the flitch plate is not slotted, the value is 0.6, which is basically consistent with the value 0.5 given by theoretical derivation.

Key words： Converter transformer flitch plate eddy current loss frequency characteristics

Received: 28 January 2021

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TM41

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	Huang Tianchao
	Wang Zezhong

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Huang Tianchao,Wang Zezhong. Frequency Characteristic Analysis of Flitch Plate Losses in UHV Converter Transformer[J]. Transactions of China Electrotechnical Society, 2021, 36(19): 4132-4139.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210154 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I19/4132

[1] 潘超, 王格万, 蔡国伟, 等. 交直流混杂模式下变压器励磁电流谐波与箱体损耗映射研究[J]. 电工技术学报, 2019, 34(13): 2830-2838.
Pan Chao, Wang Gewan, Cai Guowei, et al.Research on maping from excitation current harmonic to tank loss for AC-DC hybrid operation of transformer[J]. Transactions of China Electrotechnical Society, 2019, 34(13): 2830-2838.
[2] 赵庆波, 张正陵, 白建华, 等. 基于特高压输电技术的电力规划理论创新及实践[J]. 中国电机工程学报, 2014, 34(16): 2523-2532.
Zhao Qinbo, Zhang Zhengling, Bai Jianhua, et al.Theoretical innovation and practice of power planning based on UHV transmission technology[J]. Proceedings of the CSEE, 2014, 34(16): 2523-2532.
[3] 杜伯学, 朱闻博, 李进, 等. 换流变压器阀侧套管油纸绝缘研究现状[J]. 电工技术学报, 2019, 34(6): 1300-1309.
Du Boxue, Zhu Wenbo, Li Jin, et al.Research status of oil-paper insulation for valve side bushing of converter transformer[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1300-1309.
[4] Kerenyi D.Approximate formula for the eddy current losses induced in rectangular metal blocks magnetic fields[J]. GANZ Electric Review, 1987, 16(1): 13-22.
[5] Koppikar D A, Kulkarni S V, Srinivas P N, et al.Evaluation of flitch plate losses in power transformers[J]. IEEE Transactions on Power Delivery, 2002, 14(3): 996-1001.
[6] 张志刚, 胡明方, 杜仕祥, 等. 电力变压器拉板结构、材质与其涡流损耗关系的数值优化[J]. 变压器, 2015, 52(12): 12-15.
Zhang Zhigang, Hu Mingfang, Du Shixiang, et al.Numerical optimization of the relationship between structure, material and eddy current loss of power transformer flitch plate[J]. Transformer, 2015, 52(12): 12-15.
[7] 刘连光, 潘尧, 王泽忠. 特高压换流变压器支撑件的直流偏磁损耗计算[J]. 电网与清洁能源, 2018, 34(3): 1-6.
Liu, Lianguang, Pan Yao, Wang Zezhong. Eddy current loss calculation of supporting parts of UHV converter transformer under DC bias[J]. Power System and Clean Energy, 2018, 34(3): 1-6.
[8] Emanuel A E, Wang Xiaoming.Estimation of loss of life of power transformers supplying nonlinear loads[J]. IEEE Transactions on Power Apparatus & Systems, 1985, 104(3): 628-636.
[9] Forrest J A C. Harmonic load losses in HVDC converter transformers[J]. IEEE Transactions on Power Delivery, 1991, 6(1): 153-157.
[10] Karasev V V.The dependence of losses in transformer tanks upon current, frequency and temperature[J]. All-Union Electrotech. Inst, 1969, 79(3): 129-148.
[11] Ram B S, Forrest J A C. Effects of harmonics on converter transformer load losses[J]. IEEE Transactions on Power Delivery, 1988, 3(3): 1059-1066.
[12] Liu Yaqing, Zhang Dandan, Li Zhenbiao, et al.Study of the stray losses calculation in structural parts for HVDC converter transformers based on the TEAM problem 21 family[J]. IEEE Transactions on Power Delivery, 2016, 31(2): 605-612.
[13] 赵小军, 王佳雯, 刘洋, 等. 谐波激励下变压器结构件杂散损耗的模拟与验证[J]. 中国电机工程学报, 2020, 40(2): 652-663.
Zhao Xiaojun, Wang Jiawen, Liu Yang, et al.Simulation and verification of stray loss of transformer structure under harmonic excitation[J]. Proceedings of the CSEE, 2020, 40(2): 652-663.
[14] Liu Yaqing, Zhang Dandan, Li Zhenbiao, et al.Calculation method of winding eddy-current losses forhigh-voltage direct current converter transformers[J]. IET Electric Power Applications, 2016, 10(6): 488-497.
[15] 李亚丽, 凌跃胜, 刘宏勋, 等. 高频变压器涡流损耗公式的推导及有限元方法的验证[J]. 电工技术学报, 2015, 30(增刊2): 82-87.
Li Yali, Ling Yuesheng, Liu Hongxun, et al.The derivation of eddy current loss formula and validation by using FEM in high frequency transformer[J]. Transactions of China Electrotechnical Society, 2015, 30(S2): 82-87.
[16] Kulkarni S V, Khaparde S A.Transformer engineering: design, technology, and diagnostics [M]. 2nd Ed. Los Angeles: CRC Press, 2012.
[17] Hu LiHua, Yacamini R. Harmonic transfer through converters and HVDC links[J]. IEEE Transactions on Power Electronics, 1992, 7(3): 514-525.
[18] 黄天超, 王泽忠. 地磁暴对直流输电逆变侧换相角及谐波的影响机理分析[J]. 电工技术学报, 2020, 35(16): 3377-3384.
Huang Tianchao, Wang Zezhong.Mechanism analysis of geomagnetic storm on commutation angle and harmonic of inverter side of HVDC transmission[J]. Transactions of China Electrotechnical Society, 2020, 35(16): 3377-3384.