电力变压器直流偏磁试验研究

doi:10.11985/2015.12.012

摘要/Abstract

摘要：

随着电力系统直流输电线路的投运,在单极大地运行时,直流换流站附近的交流变压器受到直流电流侵入,造成振动噪声增加及损耗增加和过热问题,影响变压器的安全运行。本文采用试验方法,研究了交流变压器在直流偏磁下的损耗、励磁电流、噪声声级和频谱情况,得出了变压器相关参数随直流电流增加而变化的规律,总结不同铁心结构交流变压器对直流偏磁的耐受能力。为变压器运行时进行状态评估和诊断提供参考。

关键词: 交流变压器, 直流偏磁, 试验研究

Abstract:

With the operation of HVDC transmission line in power system, in single pole ground operation, DC converter station in the vicinity of the AC transformer by DC current invasion, resulting in vibration and noise increase and loss increase and overheating problems and affect the transformer safe operation. The test method of DC bias of transformer without load and with some simulation load was introduced. The characteristics under loss, noise and vibration of transformer are analyzed. The suggestions of ability of withstand DC bias in power grid system are presented.

Key words: AC transformer, DC bias, test

中图分类号:

TM451

黄佐流. 电力变压器直流偏磁试验研究[J]. 电气工程学报, 2015, 10(12): 69-75.

Zuoliu Huang. Research on DC Bias Test of Power Transformer[J]. Journal of Electrical Engineering, 2015, 10(12): 69-75.

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参考文献 6

[1]	谭闻, 张小武 . 电力变压器噪声研究与控制[J]. 高压电器, 2009,45(2):70-76.
	Tan Wen, Zhang Xiaowu . Research and control of power transformer noise[J]. High Voltage Apparatus, 2009,45(2):70-76.
[2]	顾晓安, 沈密群, 朱振江 , 等. 变压器铁心振动和噪声特性的试验研究[J]. 变压器, 2004,40(4):1-4.
	Gu Xiao’an, Shen Miqun, Zhu Zhenjiang , et al. Transformer core vibration and noise characteristics of experimental study[J]. Transformer, 2004,40(4):1-4.
[3]	余尤好, 陈宝志 . 大型电力变压器的噪声分析与控制[J]. 变压器, 2007,44(6):23-26.
	Yu Youhao, Chen Baozhi . Large power transformer noise analysis and control[J]. Transformer, 2007,44(6):23-26.
[4]	周贤土 . 中小型变压器噪声[J]. 上海电器技术, 2005(4):44-60.
	Zhou Xiantu . Small and medium sized transformer noise[J]. Shanghai Electric Appliance Technology, 2005(4):44-60.
[5]	Girgis R S, Garner K, Bernesjo M, et a1. Measuring no-load and load noise of power transformers using the sound pressure and sound intensity methods-part-I: outdoors measurements[C]. IEEE Power and Energy Society General Meeting-Conversion and Delivery of Electrical Energy in the 21st Century, New York, 2008: 1-8.
[6]	Yao Yingying, Changseop Koh, Ni Guangzheng, et at. 3D nonlinear transient eddy current calculation of online power transformer under DC bias[J]. IEEE Transctions on Magnetics, 2005,41(5):1840-1843.

项目	100%UN	100%UN+ DC1A	100%UN+ DC2A	100%UN+ DC3A	100%UN+ DC5A
声功率级 /dB(A)	78.09	77.87	78.68	78.48	81.71
优势频率 /Hz	100	100	100	100	100
励磁电流/A	4.80	4.80	4.81	4.79	4.83
空载损耗 /kW	59.35	59.28	59.30	59.10	59.14

项目	100%UN	100%UN+ DC1A	100%UN+ DC2A	100%UN+ DC3A
声功率级 /dB(A)	83.84	95.97	96.79	99.03
优势频率 /Hz	100	50倍频明显	50倍频非常明显	50倍频非常明显
励磁电流/A	3.27	5.72	11.36	16.70
空载损耗 /kW	156.4	164.5	175.2	179.61

项目	100%UN	100%UN+DC1A	100%UN+DC2A
声压级/dB(A)	72.0	81.0	84.0
励磁电流/A	0.62	2.10	4.30
空载损耗/kW	154.87	160.59	161.66

项目	100%UN	100%UN+DC1A	100%UN+DC2A	100%UN+DC3A	100%UN+DC4A
声压级/dB(A)	69.0	73.0	78.0	80.0	80.0
励磁电流/A	6.50	10.22	30.35	37.50	46.74
空载损耗/kW	127.06	131.03	136.70	137.41	137.24
错开一档
声压级/dB(A)	72	74
励磁电流/A	12.03	19.63
损耗/kW	131.59	135.69
错开二档
声压级/dB(A)	72	74	77
励磁电流/A	35.86	41.36	52.02
损耗/kW	142.9	146.16	149.77