Title:
PHOTOVOLTAIC INVERTER
Document Type and Number:
WIPO Patent Application WO/2021/142905
Kind Code:
A1
Abstract:
A photovoltaic inverter, comprising an auxiliary power source, a series switch module, a direct current-direct current conversion circuit and a direct current-alternating current inverter circuit, wherein an input end of the auxiliary power source is connected to an output end of a photovoltaic assembly, and the auxiliary power source is used for supplying power to the series switch module, the direct current-direct current conversion circuit and the direct current-alternating current inverter circuit; the series switch module is arranged on a series channel between photovoltaic assemblies; and an input end of the direct current-direct current conversion circuit is connected to an output end obtained after the photovoltaic assemblies are connected in series, and is then connected to a power grid by means of the direct current-alternating current inverter circuit. After a plurality of photovoltaic assemblies are connected in series to form a string, a direct current is converted into an alternating current and grid connection is realized, and assembly-level turn-off of each photovoltaic assembly can be realized without additionally providing an assembly-level turn-off apparatus, so that system complexity is reduced on the premise of ensuring the turn-off safety of assemblies of a photovoltaic grid-connected system, thus reducing the cost of the photovoltaic grid-connected system.
Inventors:
LUO YUHAO (CN)
Application Number:
PCT/CN2020/078738
Publication Date:
July 22, 2021
Filing Date:
March 11, 2020
Export Citation:
Assignee:
ALTENERGY POWER SYSTEM INC (CN)
International Classes:
H02S40/30; H02J3/38; H02S40/36
Foreign References:
| CN109546959A | 2019-03-29 | |||
| CN109428342A | 2019-03-05 | |||
| CN209120129U | 2019-07-16 | |||
| CN110417347A | 2019-11-05 | |||
| FR2959063A1 | 2011-10-21 | |||
| KR102010315B1 | 2019-10-21 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
Download PDF: