BIPOLAR BIDIRECTIONAL DIRECT CURRENT CONVERTER, AND CONTROL METHOD AND CONTROL DEVICE THEREFOR

Title:

BIPOLAR BIDIRECTIONAL DIRECT CURRENT CONVERTER, AND CONTROL METHOD AND CONTROL DEVICE THEREFOR

Document Type and Number:

WIPO Patent Application WO/2020/038275

Kind Code:

A1

Abstract:

A bipolar bidirectional direct current (DC) converter, and a control method and a control device therefor. The bipolar bidirectional DC converter comprises at least two valve group strings (101, 102) and at least six magnetic elements (103), and said valve group strings are divided into an I-type valve group string (102) and an II-type valve group string (101) according to the connection relationship between the valve group strings (101, 102) and a low-voltage side port of the bidirectional DC converter; the positive pole of the low-voltage DC port of the I-type valve group string (102) forms the positive pole of the low-voltage side port of the bipolar bidirectional DC converter; the positive pole of the low-voltage DC port of the II-type valve group string (101) is connected to the negative pole of the low-voltage DC port of the I-valve group string (102) and forms the neutral point of the low-voltage side port of the bipolar bidirectional DC converter, and the negative pole of the low-voltage DC port of the II-type valve group string (101) forms the negative pole of the low-voltage side port of the bipolar bidirectional DC converter; each valve group string (101, 102) comprises a high-voltage DC port, a low-voltage DC port and at least three alternating current (AC) ports, and each AC port is connected to a magnetic element (103); and the other ends of the magnetic elements (103), which are connected to all the AC ports in the same valve group string (101, 102), are connected.

Inventors:

YANG CHEN (CN)
ZHANG ZHONGFENG (CN)
TIAN JIE (CN)
XIE YEYUAN (CN)
LI HAIYING (CN)
WANG YU (CN)
GE JIAN (CN)

Application Number:

PCT/CN2019/100792

Publication Date:

February 27, 2020

Filing Date:

August 15, 2019

Export Citation:

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Assignee:

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

International Classes:

H02M1/32; H02M3/158; H02M7/797

Foreign References:

CN109039072A	2018-12-18
CN102938560A	2013-02-20
CN108242896A	2018-07-03
CN103219738A	2013-07-24
US20140198533A1	2014-07-17
CN105048813A	2015-11-11

Other References: