Title:
CONTROL SYSTEM FOR DIRECT CURRENT BUS VOLTAGE, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2023/272579
Kind Code:
A1
Abstract:
A control system for a direct current bus voltage, and a control method. The control system for a direct current bus voltage comprises: a controller and an inverter, an output terminal of the inverter being connected to a power grid, and an input terminal of the inverter being connected to a photovoltaic assembly by means of a direct current bus; the controller is used for obtaining a power grid voltage; when the power grid voltage jumps, a direct current bus voltage maximum sampled value of the inverter is obtained, the direct current bus voltage maximum sampled value being a maximum voltage value detected on the direct current bus during the time that the power grid voltage jumped; obtaining a first direct current bus voltage reference value according to the direct current bus voltage maximum sampled value, wherein the direct current bus voltage reference value is greater than or equal to the direct current bus voltage maximum sampled value; and obtaining a second direct current bus voltage reference value according to the first direct current bus voltage reference value and a preset first gradient of increase value, so as to limit the rate of increase of a direct current bus voltage.
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Inventors:
CAO YUANZHENG (CN)
LI LIN (CN)
GUO HAIBIN (CN)
LI LIN (CN)
GUO HAIBIN (CN)
Application Number:
PCT/CN2021/103500
Publication Date:
January 05, 2023
Filing Date:
June 30, 2021
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02J3/38; H02J1/00
Foreign References:
| CN110994628A | 2020-04-10 | |||
| CN110571781A | 2019-12-13 | |||
| CN107102224A | 2017-08-29 | |||
| JP2012023916A | 2012-02-02 |
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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