PHOTOVOLTAIC SYSTEM AND CONTROL METHOD

WIPO Patent Application WO/2024/045653

A1

The present application discloses a photovoltaic system and a control method. The photovoltaic system comprises at least two photovoltaic strings, a power acquisition loop, a trip switch, a switch mode power supply, and a controller. The at least two photovoltaic strings are connected in series or in parallel; the trip switch is connected between the photovoltaic strings and an input end of a converter; the power acquisition loop is used for acquiring power from at least one photovoltaic string and supplying power to the switch mode power supply; the switch mode power supply is used for supplying power to the controller and the trip switch when the power acquisition loop supplies power normally; and the controller is used for controlling, when a wiring fault occurs to the at least two photovoltaic strings connected in parallel, the trip switch to be switched off. The power acquisition loop is specially provided, and the power acquisition loop can directly acquire power from the photovoltaic strings and supply power to the switch mode power supply. When the photovoltaic strings connected to the power acquisition loop are reversely connected, the switch mode power supply does not work, and the trip switch is not switched off, so that the reversely connected photovoltaic strings are not burnt out.

XU ANAN (CN)
WANG WUBO (CN)
ZHANG BING (CN)
WANG CHANGYOU (CN)

PCT/CN2023/090214

March 07, 2024

April 24, 2023

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SUNGROW POWER SUPPLY CO LTD (CN)

H02H11/00

CN115459237A	2022-12-09
CN113725847A	2021-11-30
CN211930585U	2020-11-13
CN111555340A	2020-08-18
CN205753333U	2016-11-30
US20120007429A1	2012-01-12

UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)

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