动车组静调试验中直流母线电压振荡分析与抑制

doi:10.19595/j.cnki.1000-6753.tces.211092

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Abstract In the static adjustment test in the factory, the traction converter of the high-speed EMU has a large voltage oscillation in the intermediate DC link under the simulated traction condition. Therefore, a virtual resistance control method with compensation link was proposed for the single-phase rectifier at the source side. Based on the dq coordinate mathematical model of the single-phase PWM rectifier, this paper built the equivalent output impedance model of the source-side rectifier in parallel with the secondary resonant circuit and the equivalent input impedance model of the traction inverter unit and the auxiliary converter. Then, the reason for voltage oscillations in the DC link was revealed by combining Bode diagram and Nyquist curve, that is, the interaction between the secondary resonant circuit and the constant power load will lead to the voltage oscillation in the intermediate DC link. The proposed oscillation suppression method uses virtual resistance to increase the load-side input impedance, so that the system gain can meet the exclusion zone stability criterion, and the stability margin of the system can be improved. Finally, simulation and experimental results verify the effectiveness of the analysis and the proposed control method.

Key words： Traction converter cascade system voltage oscillation virtual resistance control

Received: 19 July 2021

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TM46

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	Articles by authors
	Zhou Xuesong
	Hu Yifan
	Ma Youjie
	Qu Shijian
	Song Guanyu

Cite this article:

Zhou Xuesong,Hu Yifan,Ma Youjie等. Analysis and Suppression of Voltage Oscillation for DC Bus in Static Adjustment Test of EMU[J]. Transactions of China Electrotechnical Society, 2022, 37(14): 3701-3712.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211092 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I14/3701

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