Title:
MEDIUM AND HIGH VOLTAGE ENERGY CONVERSION SYSTEM
Document Type and Number:
Japanese Patent JP2019187229
Kind Code:
A
Abstract:
To provide a medium and high voltage energy conversion system which solves such a problem that the control method is complicated, the cost is high, and the stability and reliability of the system output are poor, and which achieves current sharing without requiring coupling control.SOLUTION: An input terminal of each of high-voltage isolated DC/DC converters 102 in a phase circuit is connected to a common DC bus. In each of the high-voltage isolated DC/DC converters 102, an open-loop control method or a closed-loop control method is applied, and a DC input voltage of a cascade module 103 connected to the high-voltage isolated DC/DC converter is adjusted into an instruction value related to a voltage of the common DC bus. In a system controller, at least a voltage-current dual loop control method is applied, and a three-phase modulation instruction to be sent to the cascade modules 103 in three phases is calculated according to a parameter related to the voltage of the common DC bus, to implement on grid control on three phase circuits. Each of the high-voltage isolated DC/DC converters 102 achieves modular control with the same method.SELECTED DRAWING: Figure 1a
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Inventors:
WANG XINYU
ZHAO TAO
ZHUANG JIACAI
XU JUN
GU YILEI
ZHAO TAO
ZHUANG JIACAI
XU JUN
GU YILEI
Application Number:
JP2019003729A
Publication Date:
October 24, 2019
Filing Date:
January 11, 2019
Export Citation:
Assignee:
SUNGROW POWER SUPPLY CO LTD
International Classes:
H02M7/483; G05F1/67; H02J3/38; H02M7/48
Domestic Patent References:
| JP2016111810A | 2016-06-20 | |||
| JP2014236606A | 2014-12-15 |
Foreign References:
| CN107612405A | 2018-01-19 | |||
| WO2014147771A1 | 2014-09-25 | |||
| WO2017094379A1 | 2017-06-08 |
Attorney, Agent or Firm:
Shinichiro Tanaka
Disciple Maru Ken
▲吉▼田 和彦
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Naoki Kondo
Takeo Nasu
Disciple Maru Ken
▲吉▼田 和彦
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Naoki Kondo
Takeo Nasu