混合模块化直流固态变压器 II：动态特性及快速响应控制

doi:10.19595/j.cnki.1000-6753.tces.L80326

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Abstract The hybrid modular DC solid state transformer (HMDCSST), based on the phase shift-dual active bridge (PS-DAB) converter and the series resonant-dual active bridge (SR-DAB), combines the advantages of PS-DAB in flexible control and SR-DAB in efficient conversion. This paper studies the dynamic characteristics and rapid response control of the HMDCSST. By analyzing the average and small signal models of PS-DAB and SR-DAB respectively, the small signal model of HMDCSST with ISOP structure was established, and the accuracy is proved by simulation. To improve the dynamic response and minimize the interference effect of input voltage and load disturbance on output voltage, a rapid dynamic response control strategy combining input voltage feedforward and load power prediction was presented. The stability analysis of this new control strategy was demonstrated by using the frequency domain Bode curve. Finally, the HMDCSST prototype was built to verify the rapid dynamic response control. Compared with the traditional PI method, the experimental results show the effectiveness and superiority of the proposed control strategy.

Key words： Hybrid modular direct current solid-state transformer (HMDCSST) dynamic response small signal model control strategy

Received: 01 July 2018 Published: 29 July 2019

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TM46

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	Fu Chao
	Gao Zhen
	Sun Yuwei
	Wu Chengjie

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Fu Chao,Gao Zhen,Sun Yuwei等. Hybrid Modular Direct Current Solid State Transformer II: Dynamic Characteristic and Rapid Response Control[J]. Transactions of China Electrotechnical Society, 2019, 34(14): 2980-2989.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80326 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I14/2980

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