超级电容接口双向DC-DC变换器的电压快恢复控制策略

doi:10.19595/j.cnki.1000-6753.tces.180012

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Abstract Control of bus voltage stability in DC microgrid is a key issue, which is particularly important when the DC bus is disturbed at different time scales. In order to solve the problem of instantaneous power imbalance of the DC bus, the idea of capacitor charge balance control (CBC) was introduced to supercapacitor interfacing bidirectional DC-DC converter to realize fast recovery of bus voltage with high power density of the supercapacitor. Based on existing CBC for unidirectional current DC-DC converter, the idea of indirectly predicting the change of capacitor current was extended and optimized. Moreover, the general substitution method of node current was obtained and the corresponding control law was also derived to achieve the objective of fast control of bidirectional current. The detailed implementation of the hybrid control strategy based on CBC was given, and the average current mode control combined with hysteresis current limiter were used to realize stable control of the interfacing converter at both sides. Finally, simulation and prototype experiments verify the effectiveness of the proposed hybrid control strategy.

Key words： DC microgrid supercapacitor bidirectional DC-DC converter capacitor charge balance control transient response

Received: 04 January 2018 Published: 17 December 2018

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TM46

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	Liu Sucheng
	Gan Yangyang
	Liu Xiaodong
	Liu Yanfei

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Liu Sucheng,Gan Yangyang,Liu Xiaodong等. Fast Voltage Recovery Control Strategy for Supercapacitor Interfacing Bidirectional DC-DC Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(23): 5496-5508.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180012 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I23/5496

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