Title:
PHOTOVOLTAIC SYSTEM, DIRECT-CURRENT COMBINER BOX AND WIRING ERROR DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/218338
Kind Code:
A1
Abstract:
Disclosed in the present application are a photovoltaic system, a direct-current combiner box and a wiring error detection method. The photovoltaic system comprises M direct-current combiner boxes and N inverters, wherein positive output ends and negative output ends of the M direct-current combiner boxes are respectively connected to direct-current buses, and an input end of each direct-current combiner box is connected to a photovoltaic string respectively corresponding thereto; input ends of the N inverters are connected to the direct-current buses; each direct-current combiner box from among the M direct-current combiner boxes comprises a soft-start circuit, the soft-start circuit at least comprising a switch device and an output capacitor which are connected in series, and the output capacitor being connected in parallel to a positive output end and a negative output end of the direct-current combiner box; when the switch device in at least one of the M direct-current combiner boxes is switched on, the output capacitor which is connected in series to the switched-on switch device is charged, and the remaining switch devices are switched off; and whether a wiring error occurs in the M direct-current combiner boxes is determined according to the voltage of the output capacitors in at least some of the soft-start circuits. By means of the solution, whether there is a wiring error in direct-current combiner boxes is determined by means of measuring the voltage of output capacitors.
Inventors:
GAO YONGBING (CN)
LIN TIANSAN (CN)
ZHANG FANGPO (CN)
LIN JIANFEI (CN)
LIN TIANSAN (CN)
ZHANG FANGPO (CN)
LIN JIANFEI (CN)
Application Number:
PCT/CN2022/086593
Publication Date:
October 20, 2022
Filing Date:
April 13, 2022
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02J3/38; H02H11/00
Domestic Patent References:
| WO2012029774A1 | 2012-03-08 | |||
| WO2015043663A1 | 2015-04-02 |
Foreign References:
| CN113489046A | 2021-10-08 | |||
| CN211127119U | 2020-07-28 | |||
| JP2010041794A | 2010-02-18 | |||
| CN106655750A | 2017-05-10 | |||
| CN112260533A | 2021-01-22 | |||
| CN202110412834A | 2021-04-16 |
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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