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Title:
PHOTOVOLTAIC INVERTER AND POWER ADJUSTMENT METHOD THEREFOR, AND PHOTOVOLTAIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/104363
Kind Code:
A1
Abstract:
A photovoltaic inverter (20) and a power adjustment method therefor, and a photovoltaic system (1). The photovoltaic inverter (20) comprises a direct-current conversion unit (201), an alternating-current inversion unit (202), a control unit (203) and a direct-current bus (204), wherein an input end of the direct-current conversion unit (201) is used for connecting a photovoltaic assembly (10), an output end of the direct-current conversion unit (201) is connected to an input end of the alternating-current inversion unit (202) by means of a direct-current bus (204), and an output end of the alternating-current inversion unit (202) is used for connecting a load. The control unit (203) is used for controlling, when the power of the load is less than the maximum power that is output by the photovoltaic assembly (10) in the current illumination environment, the direct-current conversion unit (201) to switch from an MPPT mode to a bus constant mode, such that the input voltage of the direct-current conversion unit (201) changes with the power of the load, and then the output power of the photovoltaic assembly (10) is synchronously adjusted with the output power required by the photovoltaic inverter (20), wherein the bus constant mode involves adjusting the output voltage of the direct-current conversion unit (201) to be a constant value or to be within a preset range. The power response speed of a photovoltaic inverter (20) can be improved.

Inventors:
XU FEI (CN)
YU XINYU (CN)
XIN KAI (CN)
CHEN DONG (CN)
LIU YUNFENG (CN)
Application Number:
PCT/CN2023/131673
Publication Date:
May 23, 2024
Filing Date:
November 15, 2023
Export Citation:
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Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02J3/38; G05F1/67
Foreign References:
CN116316795A2023-06-23
CN106340895A2017-01-18
CN114204901A2022-03-18
CN113608571A2021-11-05
CN109802556A2019-05-24
US20190148948A12019-05-16
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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