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《Modern Electronics Technique》 2015-18
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Harmonic current detecting method of inter turn short-circuit fault in salient-pole synchronous generator based on Duffing system

HAN Jianqun;SHI Xudong;College of Engineering,Bohai University;Aeronautical Automation College,Civil Aviation University of China;  
Aimed at the problem existing in harmonic current detection when the inter turn short-circuit fault happens in salient- pole synchronous generator,a new detecting method based on Duffing chaotic system is proposed in this research. The mathematical simulation model of salient-pole synchronous generator is established on the basis of multi-loop analysis theory,the simulation signals of the fault harmonic current are given,and then the exist of fault harmonic current is determined by the sensitive weak-signal detection features of Duffing system and by identifying the conversion process from chaotic state to largescale periodic state of Duffing system. Simulation results show that Duffing system can detect the harmonic current. The detecting method presented in the paper is effective.
【Fund】: 国家自然科学基金资助项目(51277011)
【CateGory Index】: TM31
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