Title:
DC-DC CONVERSION SYSTEM AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/036223
Kind Code:
A1
Abstract:
A DC-DC conversion system and a control method therefor, the system comprising: a phase unit (401) and a controller (407); the phase unit (401) includes a plurality of bridge arms, and the plurality of bridge arms are in a star connection to form a common terminal (411) and a plurality of output terminals (408, 409, 410); each bridge arm includes a variable voltage source (402, 403, 404), and the controller (407) is connected to each of the variable voltage sources (402, 403, 404) for controlling the voltages of the respective variable voltage sources (402, 403, 404). Compared with the prior art, in the DC-DC conversion system and the control method therefor, the respective bridge arms in the phase unit (401) thereof are in a star connection, so that the commutation for energy balance only circulates inside the system, and does not flow into a DC system; meanwhile, the system uses fewer power electronic devices and filters, and can be applied in the field of high-voltage large-capacity DC power transmission, thus reducing the limit imposed by inductive components on DC power transmission in a DC-DC conversion system.
Inventors:
TANG GUANGFU (CN)
HE ZHIYUAN (CN)
WANG XINYING (CN)
WEI XIAOGUANG (CN)
PANG HUI (CN)
ZHANG SHENG (CN)
WANG CHENGHAO (CN)
GAO YANG (CN)
KE JINKUN (CN)
YANG BINGJIAN (CN)
ZHOU WANDI (CN)
ZHANG NING (CN)
LIU YUAN (CN)
DING XIAO (CN)
HE ZHIYUAN (CN)
WANG XINYING (CN)
WEI XIAOGUANG (CN)
PANG HUI (CN)
ZHANG SHENG (CN)
WANG CHENGHAO (CN)
GAO YANG (CN)
KE JINKUN (CN)
YANG BINGJIAN (CN)
ZHOU WANDI (CN)
ZHANG NING (CN)
LIU YUAN (CN)
DING XIAO (CN)
Application Number:
PCT/CN2017/085264
Publication Date:
March 01, 2018
Filing Date:
May 22, 2017
Export Citation:
Assignee:
GLOBAL ENERGY INTERCONNECTION RES INSTITUTE (CN)
STATE GRID CORP CHINA (CN)
STATE GRID CORP CHINA (CN)
International Classes:
H02M3/155
Foreign References:
| CN103797698A | 2014-05-14 | |||
| CN101295925A | 2008-10-29 | |||
| CN101814827A | 2010-08-25 | |||
| CN105375757A | 2016-03-02 | |||
| CN105340165A | 2016-02-17 | |||
| US20050111245A1 | 2005-05-26 |
Other References:
See also references of EP 3393030A4
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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