船舶全电力推进系统恒功率负载有源阻尼控制策略

doi:10.19595/j.cnki.1000-6753.tces.L80770

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Abstract The resonance of LC filter caused by constant power load is an important problem in all-electric ship. An active damping control strategy of Buck converter based on input voltage feedforward is proposed. Firstly, the negative impedance characteristics of constant power load and the mechanism of LC filter resonance are analyzed by small signal model. The stability constraints of cascade between constant power load and LC filter are derived in detail. Then, the input voltage feedforward based on second-order low-pass filter is introduced into the inner current loop. It generates a damped current to counteract the effect of negative impedance on LC resonance. The design method of damping parameters is given. Finally, the Bode and Nyquist diagram of the impedance ratio demonstrate the stability of the system. The experimental results verify the effectiveness and feasibility of the proposed control strategy.

Key words： Active damping constant power load (CPL) negative impedance LC filter resonance all-electric ships

Received: 10 July 2018 Published: 05 March 2020

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TM46

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	Articles by authors
	Zhuang Xuzhou
	Zhang Qinjin
	Liu Yancheng
	Guo Hongzhi
	Zhang Bo

Cite this article:

Zhuang Xuzhou,Zhang Qinjin,Liu Yancheng等. An Active Damping Control of Constant Power Load for All-Electric Ships[J]. Transactions of China Electrotechnical Society, 2020, 35(zk1): 101-109.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80770 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk1/101

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