输入串联输出并联LCL型并网逆变器系统的目标多重化控制策略

doi:10.19595/j.cnki.1000-6753.tces.180498

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Abstract Input-series-output-parallel (ISOP) inverter combined system is generally used in the occasions of high DC voltage at the input terminal and high AC power at the output side. If the topology of the ISOP inverter is applied to the grid-connected system, multiple small-capacity standardized inverter modules can constitute a bulky-capacity grid-connected inverter system, which will effectively improve system reliability and facilitate system design. In this paper, based on ISOP LCL grid-connected inverter combination system, its topology is optimized to reduce the volume and weight of the system. Then the control variables are carefully chosen, and a novel distributed control strategy is put forward to achieve multiple control objectives of grid-connected combined system, including power balance, suppression of resonance spikes, and high power factor of grid current. After that, based on the distributed control, the paper proposes a redundant operation plan to ensure the smooth exit of the faulty module and the successful throwing into the system of the back-up module. Finally, the prototypes are tested, which verifies the proposed scheme.

Key words： Input-series-output-parallel (ISOP) grid-connected inverter power balance LCL filter redundancy

Received: 02 April 2018 Published: 29 March 2019

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TM461

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	Fang Tianzhi
	Zhang Xianyun
	Huang Chun
	He Wei
	Shen Le

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Fang Tianzhi,Zhang Xianyun,Huang Chun等. Control Strategy to Reach Multiple Objectives for Input-Series- Output-Parallel LCL-Type Grid-Connected Inverter System[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1189-1200.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180498 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I6/1189

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19 通信作者:方天治男,1977年生,博士,副教授,研究方向为逆变器及电力电子系统集成.E-mail: fangtianzhi@126.com