UHV输电暂态信号的动力学分析新方法

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Abstract It is important to protect the entire power grid for security, stability and reliable operation through identifying fault correctly and removing it rapidly for UHV AC transmission line. By PSCAD-EMTDC simulation, on the basis of comparing maximum overcurrent of the fault phase and non-fault phase for different faults types, from view point of dynamics, this paper analyses the variation rule of chaotic characteristics for fault signals. Utilizing the better anti-interference characteristics of Duffing chaos system for environmental interference, phase trajectory diagrams under different fault types are obtained by using fault signals detected as the perturbation input of system, and then the finger mark fault information is extracted using wavelet edge detection technique for each phase diagram. Finally, different fault types are classified accurately by fault signals using Duffing chaos system for one 750kV transmission line. Results show that this detection method has preferable ability to identify faults, whose validity is verified.

Key words： UHV line fault dynamics Duffing chaos system wavelet

Received: 02 June 2010 Published: 20 March 2014

PACS:	TM711
	TM726
	TM773

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	Articles by authors
	Li Yi
	Wu Zhengqiu
	Wang Feng
	Liu Kaipei
	Lu Jiazheng

Cite this article:

Li Yi,Wu Zhengqiu,Wang Feng等. New Research Approach Using Dynamic Analysis for Ultra High Voltage(UHV)Transmission Transient Signal[J]. Transactions of China Electrotechnical Society, 2012, 27(10): 44-51.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I10/44

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