MLPE photovoltaic system and method for photovoltaic string control in MLPE photovoltaic system

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United States of America Patent

PATENT NO 11841724
APP PUB NO 20220147090A1
SERIAL NO

17519659

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Abstract

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A module level power electronics (MLPE) photovoltaic system and a method for photovoltaic string control are provided. The method is applied to a control unit in the MLPE photovoltaic system. The control unit detects an output current of each photovoltaic string in the MLPE photovoltaic system, and then controls, for photovoltaic strings connected in parallel to a same inverter in the MLPE photovoltaic system, a voltage of a photovoltaic string with larger output current to be reduced, or controls a voltage of a photovoltaic string with smaller output current to be increased, so that backflow current can be reduced to preset range tolerable for MLPE device. The method is from a perspective of the MLPE photovoltaic system, the backflow current is limited by controlling voltage change of associated photovoltaic string without additional hardware cost, effectively protecting MLPE device in the MLPE photovoltaic system.

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Patent Owner(s)

Patent OwnerAddress
SUNGROW POWER SUPPLY CO LTDNO 1699 XIYOU RD NEW & HIGH TECHNOLOGY INDUSTRIAL DEVELOPMENT ZONE HEFEI ANHUI 230088 230088

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Peng, Yuqi Hefei, CN 4 0
Xu, Jun Hefei, CN 1004 7793
Yang, Yu Hefei, CN 465 3413

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