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Title:
MULTI-MODE SOLAR OFF-GRID AND GRID-CONNECTED INVERTER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/068787
Kind Code:
A1
Abstract:
Disclosed is a multi-mode solar off-grid and grid-connected inverter system, comprising: a control DSP, a single-phase/three-phase output dial switch and four groups of main power conversion circuits, wherein the four groups of main power conversion circuits are respectively a bidirectional converter power unit, an off-grid inverter power unit, an MPPT power circuit unit and a battery charging and discharging power unit. According to the present invention, through independent circuit design and corresponding control DSP design, three independent inverter circuits A, B and C of a bidirectional converter power unit are identified as three independent single-phase bidirectional converters, and an independent detection and control algorithm is used, so that a circuit architecture can automatically adapt to input single-phase and three-phase voltages. Moreover, an output mode of the off-grid inverter power unit is determined through a single-phase/three-phase output dial switch, so that the output of the system can be in a single-phase or three-phase mode, and in this way, input and output modes such as single-phase input and single-phase output, single-phase input and three-phase output, three-phase input and single-phase output and three-phase input and three-phase output can be realized.

Inventors:
HUANG MIN (CN)
LUO SHIMING (CN)
Application Number:
PCT/CN2020/118463
Publication Date:
April 15, 2021
Filing Date:
September 28, 2020
Export Citation:
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Assignee:
AEROSPACE BAYKEE GUANGDONG TECH CO LTD (CN)
International Classes:
H02J3/38; H02J3/32
Foreign References:
CN110535181A2019-12-03
CN210468820U2020-05-05
CN109494801A2019-03-19
CN207134805U2018-03-23
US20180083525A12018-03-22
Attorney, Agent or Firm:
BEIJING MIZAR STAR INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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