Title:
CONTROL METHOD AND SYSTEM FOR THREE-PHASE GRID-CONNECTED INVERTER, AND THREE-PHASE GRID-CONNECTED INVERTER
Document Type and Number:
WIPO Patent Application WO/2021/082220
Kind Code:
A1
Abstract:
A three-phase grid-connected inverter, a control system thereof and a control method therefor. The inverter is a three-phase three-leg grid-connected inverter, and a filter capacitor is connected to a negative electrode of a DC input bus to form a filter loop, so as to filter harmonic wave in the circuit, realizing high-quality grid-connected current at small power, without increasing an inductance value, so that the parallel inverter device in the system operates stably and thus is applicable to photovoltaic microinverters. Moreover, the three-phase three-leg grid-connected inverter operates in a discontinuous conduction mode, that is, in a switching cycle, the inductive current is reduced to 0, so that the switching loss of the three-phase three-leg grid-connected inverter is reduced.
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Inventors:
QI BIAOJIE (CN)
WU JIAN (CN)
YANG YONGCHUN (CN)
LUO YUHAO (CN)
WU JIAN (CN)
YANG YONGCHUN (CN)
LUO YUHAO (CN)
Application Number:
PCT/CN2019/126250
Publication Date:
May 06, 2021
Filing Date:
December 18, 2019
Export Citation:
Assignee:
ALTENERGY POWER SYSTEM INC (CN)
International Classes:
H02M1/12; H02M7/5387
Foreign References:
| CN103427435A | 2013-12-04 | |||
| CN106887964A | 2017-06-23 | |||
| CN103997249A | 2014-08-20 | |||
| CN105162350A | 2015-12-16 | |||
| US20150062991A1 | 2015-03-05 | |||
| CN201911045352A | 2019-10-30 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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