CHAINED MULTI-PORT GRID-CONNECTED INTERFACE APPARATUS AND CONTROL METHOD

Title:

CHAINED MULTI-PORT GRID-CONNECTED INTERFACE APPARATUS AND CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2019/007135

Kind Code:

A1

Abstract:

Provided are a chained multi-port grid-connected interface apparatus and a control method therefor. The chained multi-port grid-connected interface apparatus comprises: a commutation chain, at least one direct-current converter, and at least one direct-alternating converter, wherein the commutation chain is formed by at least two sub-module units connected in series in the same direction, one end of the direct-current converter is connected to a direct-current end of the sub-module unit, and the other end is a direct-current interaction port of the chained multi-port grid-connected interface apparatus, a direct-current connection end of the direct-alternating converter is connected to the direct-current end of the sub-module unit, and an alternating-current connection end is an alternating-current interaction port of the chained multi-port grid-connected interface apparatus. The chained multi-port grid-connected interface apparatus provides multiple ports independent from each other for the access of a low-voltage power supply, loads and an energy storage unit, realizing plug and play, thereby greatly reducing the implementation difficulty and cost.

Inventors:

XIE YEYUAN (CN)
WANG YU (CN)
LI HAIYING (CN)
LIAN JIANYANG (CN)
ZHANG ZHONGFENG (CN)
TIAN JIE (CN)

Application Number:

PCT/CN2018/083773

Publication Date:

January 10, 2019

Filing Date:

April 19, 2018

Export Citation:

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Assignee:

NR ELECTRIC CO LTD (CN)
NR ENGINEERING CO LTD (CN)

International Classes:

H02J3/38

Foreign References:

CN107276125A	2017-10-20
CN207010253U	2018-02-13
CN205265555U	2016-05-25
CN105960746A	2016-09-21
US20100156189A1	2010-06-24

Other References: