Title:
MULTI-INPUT TURN-OFF DEVICE AND CONTROL METHOD THEREFOR, AND PHOTOVOLTAIC POWER GENERATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/134027
Kind Code:
A1
Abstract:
Disclosed in the present invention is a multi-input turn-off device. The multi-input turn-off device comprises: a first input end, which is coupled to a first photovoltaic unit; at least one second input end, which is coupled to a second photovoltaic unit, wherein the second photovoltaic unit comprises at least one battery sub-string and a freewheeling diode connected in parallel to the battery sub-string; a first turn-off module, which at least comprises a first switch tube and a first bypass tube, wherein when the first photovoltaic unit is abnormal, the first bypass tube provides a freewheeling channel for a power bus current; at least one second turn-off module, which at least comprises a second switch tube; and a control module, which respectively controls the turning-on and turning-off of the first switch tube and the second switch tube according to a monitoring signal and a communication signal, wherein when the second photovoltaic unit is abnormal, the control module controls the second switch tube to turn on, and the second switch tube, and the freewheeling diode, which is connected in parallel to the battery sub-string, in the second photovoltaic unit provide freewheeling channels for the power bus current. By means of the invention, a freewheeling diode built into a photovoltaic assembly is multiplexed, such that a bypass tube of a turn-off module inside a turn-off device is omitted, thereby reducing the bypass loss.
Inventors:
YU HONGBIN (CN)
CAI YANLIANG (CN)
RONG QIANG (CN)
ZHAO YI (CN)
YANG BO (CN)
CAI YANLIANG (CN)
RONG QIANG (CN)
ZHAO YI (CN)
YANG BO (CN)
Application Number:
PCT/CN2022/084356
Publication Date:
July 20, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
HOYMILES POWER ELECTRONICS INC (CN)
International Classes:
H03K17/00; H02S40/30; H03K17/56
Foreign References:
| CN114050811A | 2022-02-15 | |||
| CN110299727A | 2019-10-01 | |||
| CN113659929A | 2021-11-16 | |||
| CN113270893A | 2021-08-17 | |||
| CN111313825A | 2020-06-19 | |||
| CN215498289U | 2022-01-11 |
Attorney, Agent or Firm:
CVC INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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