Title:
SERIES-TYPE INVERTER SYSTEM AND PROTECTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/174623
Kind Code:
A1
Abstract:
The present application discloses a series-type inverter system and a protection method therefor. In the present application, a fault current is suppressed when a positive line or negative line is short-circuited to the ground. A protective circuit comprises: a control unit and a bidirectionally controllable switching circuit; the bidirectionally controllable switching circuit is connected in series on a midpoint lead-out line obtained after direct-current sides of two inverter units are connected in series; the control unit is configured to, when it is detected that a current of the bidirectionally controllable switching circuit exceeds a threshold, control the bidirectionally controllable switching circuit to be disconnected from a conduction path that is in the same direction as a current fault current direction, or control bidirectional conduction paths of the bidirectionally controllable switching circuit to be simultaneously disconnected.
Inventors:
CHEN PENG (CN)
SUN SHUAI (CN)
LI SHUN (CN)
SUN SHUAI (CN)
LI SHUN (CN)
Application Number:
PCT/CN2021/128032
Publication Date:
August 25, 2022
Filing Date:
November 02, 2021
Export Citation:
Assignee:
SUNGROW POWER SUPPLY CO LTD (CN)
International Classes:
H02M7/5387; H02H3/08; H02H7/122
Foreign References:
| CN112953285A | 2021-06-11 | |||
| CN104218609A | 2014-12-17 | |||
| CN111682510A | 2020-09-18 | |||
| CN105472839A | 2016-04-06 | |||
| US20020101747A1 | 2002-08-01 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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