Title:
POWER CONVERSION SYSTEM AND RIPPLE CURRENT SUPPRESSION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/082715
Kind Code:
A1
Abstract:
Provided in the present application are a power conversion system and a ripple current suppression method therefor. The power conversion system comprises a controller, M direct-current converter units, a bus capacitor and an inverter unit. An input end of each direct-current converter unit amongst the M direct-current converter units is connected to a direct-current power supply; output ends of the M direct-current converter units are connected in parallel and then connected to an input end of the inverter unit; the bus capacitor is connected to the input end of the inverter unit in parallel; an output end of the inverter unit is used for connecting to a power grid or a load. When the ripple current amplitude of the bus capacitor is greater than a first threshold, the controller is used for controlling N direct-current converter units amongst the M direct-current converter units to regulate the output current/input current, thus reducing the ripple current amplitude of the bus capacitor, M being greater than or equal to 2, and N being a positive integer less than M. When the output power of the power conversion system is not obviously reduced, the present application can improve the suppression effect on the ripple current of the bus capacitor, thus improving the long-term reliability of the power conversion system.
Inventors:
CHEN, Dong (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
LU, Fenglong (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
TANG, Yunyu (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
SHI, Lei (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
XIN, Kai (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
LU, Fenglong (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
TANG, Yunyu (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
SHI, Lei (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
XIN, Kai (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
Application Number:
PCT/CN2023/105306
Publication Date:
April 25, 2024
Filing Date:
June 30, 2023
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD. (39th Floor Block A, Antuoshan Headquarters Towers, 33 Antuoshan 6th Road, Futian Distric, Shenzhen Guangdong 3, CN)
International Classes:
H02M7/42; H02M3/00; H02J3/01; H02J3/38
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (Huihua Commercial & Trade Building No. 80 XianLie Zhong Road, Yuexiu Distric, Guangzhou Guangdong 0, CN)
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