小电容双PWM调速系统直流母线电压波动抑制策略

doi:10.19595/j.cnki.1000-6753.tces.211056

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Abstract Dual-PWM AC-DC-AC speed regulating system is widely used in modern Marine electric cranes. However, the system is not suitable for integration and maintenance because the DC bus uses large-capacity electrolytic capacitors. Based on the modeling of small signals, this paper presents a control strategy using small capacitance. Firstly, the reasons for system instability when the DC bus adopts small capacitors are analyzed. Then, the DC bus voltage feed-forward compensation and the d-axis current feed-forward compensation are designed to improve the system stability and load capacity. Combined with their advantages, the control strategy of small capacitance dual PWM speed regulation system is obtained. The simulation and experiment with permanent magnet synchronous motor as the load show that this strategy can ensure the stable operation of the system, restrain the voltage fluctuation of the DC bus during load sudden change and vibration, reduce the harmonic injection into the power network, and the parameter design method is universal.

Key words： Dual-PWM speed regulating small signal modeling small capacitance feed-forward compensation restrain the voltage fluctuation of the DC bus

Received: 15 July 2021

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TM921

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	Articles by authors
	Yao Xuliang
	Luo Xinghong
	Ma He
	Huang Shengqi

Cite this article:

Yao Xuliang,Luo Xinghong,Ma He等. DC Bus Voltage Fluctuation Suppression Strategy for Small Capacitance Dual-PWM Speed Regulating System[J]. Transactions of China Electrotechnical Society, 2022, 37(12): 2971-2981.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211056 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I12/2971

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