| A new phase comparison pilot protection based on wavelet transform |
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| 作者姓名： | 杨赢 邰能灵 郁惟慵 |
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| 作者单位： | Power System and Automation Discipline Department of Electric Power Engineering Shanghai Jiaotong University，Power System and Automation Discipline Department of Electric Power Engineering Shanghai Jiaotong University，Power System and Automation Discipline Department of Electric Power Engineering Shanghai Jiaotong University Shanghai 200240 China Shanghai 200240 China Shanghai 200240 China |
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| 基金项目： | Sponsored by the Power Electrical Science and Technology Foundation of XJ Group and the Shanghai University Foundation for Excellent Young Teacher. |
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| 摘 要： | Current phase comparison based pilot protectionhad been generally utilized as primary protection of thetransmission lines in China from the 1950’s to the1980’s. It has advantages such as being immunized topower swings and only needing current quantities…
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| 关 键 词： | 纵联保护 复杂小波 瞬变高频组分 相位比较 |
| 文章编号： | 1005-9113（2006）04-0379-06 |
| 收稿时间： | 2004-06-29 |
A new phase comparison pilot protection based on wavelet transform |
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| YANG Ying,TAI Neng-ling,YU Wei-yong.A new phase comparison pilot protection based on wavelet transform[J].Journal of Harbin Institute of Technology,2006,13(4):379-384. |
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| Authors: | YANG Ying TAI Neng-ling YU Wei-yong |
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| Abstract: | Current phase comparison based pilot protection had been generally utilized as primary protection of the transmission lines in China from the 1950's to the 1980's. Conventional phase comparison pilot protection has a long phase comparison time, which results in a longer fault-clearing time. This paper proposes a new current phase comparison. pilot protection scheme that is based on non-power frequency fault current component.The phase of the fourth harmonic current of each end of the protected line has been abstracted by utilizing complex wavelet transformation and then compared in order to determine whether the inner fault occurs or not. This way can greatly decrease fault-clearing time and improve performances of this pilot protection when fault occurs under the heavy-load current and asymmetrical operation conditions. Many EMTP simulations have verified theproposed scheme's correctness and effectiveness. |
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| Keywords: | pilot protection complex wavelet transient highfrequency component |
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