Title:
POWER SUPPLY SYSTEM AND POWER CONVERSION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/097517
Kind Code:
A1
Abstract:
The present application provides a power supply system and a power conversion method. The power supply system comprises a power generation device, a converter circuit and a driving control circuit. When a power grid fails, the driving control circuit can be used for controlling, on the basis of the duration of a previous low-voltage ride-through, the converter circuit to boost a current value, which is outputted to the power grid, from a first working current value to a current of a low-voltage ride-through current value, so as to improve a voltage value of an output end of the converter circuit. Here, the previous low-voltage ride-through is the low-voltage ride-through closest to the current one. By adopting the present application, the system can control, on the basis of the duration of a previous voltage ride-through, the converter circuit to output a current to the power grid, circuit oscillation is reduced, the structure is simple, the control method is simple and convenient, and the safety is high.
Inventors:
SHAO ZHANGPING (CN)
XIN KAI (CN)
WANG CONGYUAN (CN)
XIN KAI (CN)
WANG CONGYUAN (CN)
Application Number:
PCT/CN2021/134642
Publication Date:
June 08, 2023
Filing Date:
November 30, 2021
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02J3/00; H02H7/12
Foreign References:
| CN112467781A | 2021-03-09 | |||
| CN103606959A | 2014-02-26 | |||
| CN107947221A | 2018-04-20 | |||
| CN108879760A | 2018-11-23 | |||
| US20130193933A1 | 2013-08-01 | |||
| GB37408TA |
Other References:
YUZE LI, ZHOU NIANCHENG, HOU JIANSHENG, WU JIAFANG, GONG LI: "Probabilistic Evaluation of Short-Circuit Currents in Active Distribution Grids Considering Low Voltage Ride-Through Uncertainty of Photovoltaic", TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY, vol. 35, no. 3, 10 February 2020 (2020-02-10), pages 564 - 576, XP093069172, ISSN: 1000-6753, DOI: 10.19595/j.cnki.1000-6753.tces.190049
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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