Title:
BIPOLAR PHOTOVOLTAIC SYSTEM, POWER SUPPLY SYSTEM AND REDUNDANCY PROTECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/110096
Kind Code:
A1
Abstract:
The present application discloses a bipolar photovoltaic system, a power supply system and a redundancy protection method. The photovoltaic system at least comprises: a first output end, a second output end and a third output end of a power converter being respectively connected to a first end of a direct current positive bus, a first end of a neutral bus and a first end of a direct current negative bus; a first input end and a second input end of a first inverter being respectively connected to a second end of the direct current positive bus and a second end of the neutral bus, and a first input end and a second input end of a second inverter being respectively connected to the second end of the neutral bus and a second end of the direct current negative bus; a first controller outputting a first overvoltage alarm signal when at least one of the following conditions is satisfied; and a second controller outputting a second overvoltage alarm signal when at least one of the following conditions is satisfied, at least one of the following conditions comprising: the voltage of the direct current positive bus to ground being greater than or equal to a preset threshold, and the voltage of the direct current negative bus to ground being greater than or equal to a preset threshold or the voltage of the neutral bus to ground being greater than or equal to a preset threshold. When a fault occurs in a system, the redundancy protection is performed in time.
Inventors:
XU ZHIWU (CN)
FANG HONGMIAO (CN)
ZHANG YANZHONG (CN)
SUN CHANGSHUAN (CN)
LIN TIANSAN (CN)
FANG HONGMIAO (CN)
ZHANG YANZHONG (CN)
SUN CHANGSHUAN (CN)
LIN TIANSAN (CN)
Application Number:
PCT/CN2020/132570
Publication Date:
June 02, 2022
Filing Date:
November 30, 2020
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02J3/38; H02J1/08
Foreign References:
| CN107147145A | 2017-09-08 | |||
| CN104218609A | 2014-12-17 | |||
| CN106130058A | 2016-11-16 | |||
| US10044190B2 | 2018-08-07 |
Other References:
See also references of EP 4235994A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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