Modeling and Control Method of Photovoltaic Micro-Inverter

doi:10.16182/j.issn1004731x.joss.201703030

Journal of System Simulation ›› 2017, Vol. 29 ›› Issue (3): 690-697.doi: 10.16182/j.issn1004731x.joss.201703030

Modeling and Control Method of Photovoltaic Micro-Inverter

Liu Weiliang¹, Li Chunlai², Liu Changliang¹, Wang Yinsong¹, Lin Yongjun¹, Ma Liangyu¹, Chen Wenying¹

1. State key laboratory of Alternate Electrical Power System with Renewable Energy Sources, Baoding 071003, China;
2. Key Laboratory of Grid-Connected Photovoltaic Technology of Qinghai Province, Xining 810008, China

Received:2015-05-29 Revised:2015-08-24 Online:2017-03-08 Published:2020-06-02

Abstract

Abstract: Photovoltaic micro-inverter can solve the poor reliability and low efficiency problem of centralized inverter, therefore it has a good application prospect. Small signal analysis model was established for the photovoltaic micro-inverter with flyback topology structure. Considering function of reverse current prevention being required when it was applied to the low voltage distribution network, control methods were disigned respectively for load current tracking mode and maximum power point tracking mode, and the controller parameters were optimized using genetic algorithm. Experimental and simulation results show that the micro-inverter can steadily work in two different modes, and reduce the harmonic content of output current.

Key words: photovoltaic power generation, reverse current prevention, micro-inverter, maximum power point tracking (MPPT)

CLC Number:

TM85

Liu Weiliang, Li Chunlai, Liu Changliang, Wang Yinsong, Lin Yongjun, Ma Liangyu, Chen Wenying. Modeling and Control Method of Photovoltaic Micro-Inverter[J]. Journal of System Simulation, 2017, 29(3): 690-697.

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Modeling and Control Method of Photovoltaic Micro-Inverter

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