不隔离单相光伏并网逆变器系统输入电流低频纹波抑制

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Abstract Due to power time-varying characteristic of a single phase photovoltaic (PV) grid-connected inverter in grid side,its front-end DC-DC converter tends to draw a large AC ripple current with double grid frequency,which may decrease maxim power point tracking effect of PV side. A novel method is proposed for the low frequency input current ripple analysis of a boost converter in a non-isolated single phase PV inverter,based on back current gain A_i(s) (input current to output current) model. Mathematical models with different control schemes are built and derived,which are verified in Saber environment. It is indicated and proved that average current mode control strategy is more effective than voltage mode control and open loop control methods. Design principles are also presented. Simulation and experimental results are provided for model verification.

Key words： Photovoltaic input current low frequency ripple back current gain average current mode control

Published: 11 December 2013

PACS:

TM464

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	Articles by authors
	Ji Baojian
	Wang Jianhua
	Zhao Jianfeng

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Ji Baojian,Wang Jianhua,Zhao Jianfeng. Reduction of Low Frequency Input Current Ripple in a Non-Isolated Single Phase Photovoltaic Grid-Connecteds Inverter[J]. Transactions of China Electrotechnical Society, 2013, 28(7): 139-146.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I7/139

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