GRID-CONNECTED INSTANTANEOUS CURRENT SURGE SUPPRESSION CIRCUIT AND PHOTOVOLTAIC POWER GENERATION INVERTER SYSTEM APPLYING SAME

WIPO Patent Application WO/2018/171785

A1

The present invention relates to a grid-connected instantaneous current surge suppression circuit connected to two groups of relays disposed between an AC end of a grid-connected inverter and an electric grid. The grid-connected instantaneous current surge suppression circuit comprises a current surge suppression branch connected to both ends of any group of relays in parallel. The current surge suppression branch comprises a current suppression relay that is closed after one group of relays not connected to the current surge suppression branch is closed, and before one group of relays connected to the current surge suppression branch is closed, and a resistor connected to the current suppression relay in series. The grid-connected instantaneous current surge suppression circuit of the present invention is able to avoid a large leakage current surge generated in a photovoltaic power generation inverter system, by means of staggering a switch closing time and a series resistances configuration, and protects the photovoltaic power generation inverter system.

HUANG MIN (CN)
ZENG WEIBO (CN)
XU NAN (CN)
XIE SHIXIONG (CN)
FANG GANG (CN)
LU JINJUN (CN)

PCT/CN2018/080389

September 27, 2018

March 24, 2018

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GOODWE POWER SUPPLY TECH CO LTD (CN)

H02H9/02

CN102832842A	2012-12-19
CN202696176U	2013-01-23
CN101931240A	2010-12-29
CN107069686A	2017-08-18

SUZHOU CREATOR PATENT & TRADEMARK AGENCY LTD. (CN)

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