基于FSAD及非周期分量的励磁涌流鉴别算法

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Abstract With the increase of the capacity,the saturation magnetic flux of the transformer decreases.Meanwhile,the residual magnetism caused by DC resistance test cannot be eliminated completely.Consequently,the ultra-saturation phenomenon of the transformer may occur.Under this condition,the inrush waveform is similar to the sinusoidalwaveform.Hence,the second harmonic and the dead angle of the inrush are very small,which would make the differential protection based on the second harmonic or dead angle blocking cannot operate normally.The expressions of the inrush are derived firstly,and the generating mechanism for the ultra-saturation phenomenon is then analyzed.Based on it,a novel identification method of the inrush based on fundamental harmonic and second harmonic angle difference (FSAD) and aperiodic component is proposed.With the comparison with conventional identification methods,the novel approach can identify the ultra-saturation inrush quickly and correctly.Accordingly,it can make the protection have a faster operation speed when the transformer has internal faults.The dynamic experiment demonstrates the effectiveness and advantage of the proposed identification method.The algorithm can block the differential protection reliably when the transformer is in ultra-saturation condition and the second harmonic component is less than 8%.

Key words： Differential protection transformer magnetizing inrush ultra-saturation fundamental harmonic and second harmonic angle difference aperiodic component

Received: 15 April 2015 Published: 12 November 2015

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TM315

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	Wang Ye
	Yuan Yubo
	Gao Lei
	Lu Yuping
	Zhu Lei

Cite this article:

Wang Ye,Yuan Yubo,Gao Lei等. A Algorithm to Identify Magnetizing Inrush Current Based on FSAD and Aperiodic Components[J]. Transactions of China Electrotechnical Society, 2015, 30(21): 127-135.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I21/127

[1] 王维俭,侯炳蕴.大型机组继电保护理论基础[M].北京:水利电力出版社,1989.
[2] 王雪,王增平.基于波形时域分布特征的变压器励磁涌流识别[J].电工技术学报,2012,27(1):148-154.
Wang Xue,Wang Zengping.Identification of transformer inrush currents based on waveform distribution characteristics[J].Transactions of China Electrotechnical Society,2012,27(1):148-154.
[3] 袁宇波,李鹏,黄浩声.变压器差动保护误动原因分析及对策综述[J].江苏电机工程,2013,32(6):8-11,14.
Yuan Yubo,Li Peng,Huang Haosheng.Review on analysis and strategy for transformer differential protection malfunction[J].Jiangsu Electrical Engineering,2013,32(6):8-11,14.
[4] 王雪,王增平.基于广义基波功率的新型变压器主保护方案[J].电工技术学报,2012,27(12):191-198.
Wang Xue,Wang Zengping.Novel transformer main protection scheme based on generalized fundamental power[J].Transactions of China Electrotechnical Society,2012,27(12):191-198.
[5] 张晓宇,文继锋,程晓,等.换流变压器励磁涌流特性及其对差动保护的影响[J].江苏电机工程,2013,32(5):52-54,58.
Zhang Xiaoyu,Wen Jifeng,Cheng Xiao,et al.The characteristic of the inrush current of converter transformer and its impacts on differential protection[J].Jiangsu Electrical Engineering,2013,32(5):52-54,58.
[6] 索南加乐,许立强,焦在滨,等.基于磁路特征的三相三柱式变压器励磁参数识别[J].中国电机工程学报,2011,31(19):97-104.
Suonan Jiale,Xu Liqiang,Jiao Zaibin,et al.Identification method for excitation inductances of three-phase three-limb transformer based on characteristics of magnetic circuit[J].Proceedings of the CSEE,2011,31(19):97-104.
[7] 王业,陆于平,蔡超,等.采用自适应数据窗电流的励磁涌流鉴别方法[J].中国电机工程学报,2014,34(4):702-711.
Wang Ye,Lu Yuping,Cai Chao,et al.A magnetizing inrush identification method applying adaptive data-window currents[J].Proceedings of the CSEE,2014,34(4):702-711.
[8] 王增平,王雪.基于改进主成分分析的变压器励磁涌流识别方法[J].电力系统保护与控制,2011,39(22):1-5.
Wang Zengping,Wang Xue.Inrush current recognition in power transformer based on modified principal component analysis[J].Power System Protection and Control,2011,39(22):1-5.
[9] 熊小伏,齐晓光,欧阳金鑫.双馈风电机组短路电流对变压器保护二次谐波制动的影响[J].中国电机工程学报,2014,34(13):2201-2209.
Xiong Xiaofu,Qi Xiaoguang,Ouyang Jinxin.Effect of doubly-fed wind turbines short-circuit current on second harmonic escapement of transformer Protection[J].Proceedings of the CSEE,2014,34(13):2201-2209.
[10]邓祥力,高亮,刘建峰,等.特高压变压器模型漏感参数的稳态识别方法[J].电工技术学报,2014,29(5):255-260.
Deng Xiangli,Gao Liang,Liu Jianfeng,et al.Steady-state parameter identification of UHV transformer model[J].Transactions of China Electrotechnical Society,2014,29(5):255-260.
[11]张保会,尹项根.电力系统继电保护[M].北京:中国电力出版社,2005.