US 12,272,953 B2
Photovoltaic power generation system and photovoltaic power transmission method
Fei Xu, Shenzhen (CN); Yongbing Gao, Shanghai (CN); and Guoping Fan, Dongguan (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Dec. 2, 2022, as Appl. No. 18/074,172.
Application 18/074,172 is a continuation of application No. 16/984,418, filed on Aug. 4, 2020, granted, now 11,539,212.
Application 16/984,418 is a continuation of application No. PCT/CN2019/072778, filed on Jan. 23, 2019.
Claims priority of application No. 201810114068.0 (CN), filed on Feb. 5, 2018.
Prior Publication US 2023/0095057 A1, Mar. 30, 2023
Int. Cl. H02J 3/32 (2006.01); H02J 3/38 (2006.01); H02J 3/46 (2006.01); H02M 3/158 (2006.01); H02M 7/797 (2006.01); H02S 40/32 (2014.01)
CPC H02J 3/32 (2013.01) [H02J 3/381 (2013.01); H02J 3/46 (2013.01); H02M 3/158 (2013.01); H02M 7/797 (2013.01); H02S 40/32 (2014.12); H02J 2300/26 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A photovoltaic power generation system, comprising: at least one first photovoltaic module, a photovoltaic inverter, a first two-way direct current-direct current (DC/DC) converter, and at least two energy storage units, wherein
the photovoltaic inverter comprises a DC/DC converter and a direct current-alternating current (DC-AC) inverter, wherein an input terminal of the DC/DC converter is electrically connected to an output terminal of the at least one first photovoltaic module, an output terminal of the DC/DC converter is connected to an input terminal of the DC-AC inverter through a direct current bus, and the photovoltaic inverter is configured to convert a direct current output by the at least one first photovoltaic module into an alternating current and output the alternating current to a power grid; and
the first two-way DC/DC converter comprises at least three ports, wherein one port of the at least three ports of the first two-way DC/DC converter is electrically connected to the direct current bus, the remaining ports of the at least three ports of the first two-way DC/DC converter are electrically and respectively connected to the at least two energy storage units, and a circuit between any two ports of the first two-way DC/DC converter is configured with two-way circulation, wherein an energy is able to be circulated between the at least two energy storage units and between the photovoltaic inverter and each of the at least two energy storage units and when an amount of power demanded by the power grid is less than an amount of power generated by the at least one first photovoltaic module, the first two-way DC/DC converter is configured to circulate energy from the at least two energy storage units to the photovoltaic inverter.