Title:
INTERCONNECTED CO-PHASE TRACTION POWER SUPPLY SYSTEM BASED ON FOUR-PORT MODULAR MULTILEVEL CONVERTER
Document Type and Number:
WIPO Patent Application WO/2021/196448
Kind Code:
A1
Abstract:
The present application provides an interconnected co-phase traction power supply system based on a four-port modular multilevel converter (4P-MMC), which is constituted by connecting traction busbars of multiple interconnected co-phase traction substations to overhead lines in communication with each other. Each of the interconnected co-phase traction substations comprises traction transformers T1 and T2, and a stationary power converter (SPC) having three input ports and one output port. Three-phase primary ports of T1 and T2 are connected to three phases of a synchronous public alternating current electrical grid by means of circuit breakers. Three-phase secondary ports of T 1 and T 2 are all connected to the three input ports of the SPC, respectively. The output port of the SPC is connected to the traction busbar. The SPC is constituted by connecting k 4P-MMCs in parallel. Each of the 4P-MMCs comprises four phases. Each phase is constituted by connecting upper and lower legs in series. Neutral points of three phases of each 4P-MMC are respectively connected to corresponding input ports of the SPC by means of a three-phase circuit breaker. A neutral point of a fourth phase of each 4P-MMC is connected to the output port of the SPC by means of a circuit breaker. The present application has advantages of removal of electric phase separation for the entire overhead line, simple connections of traction transformers of substations, and high capacity utilization rate, flexible configuration, high reliability, and low costs of a system device.
Inventors:
LIN YUNZHI (CN)
WEI YINGDONG (CN)
LI ZENGQIN (CN)
LI XIAOQIAN (CN)
LI MINGRUI (CN)
ZHANG SHUQING (CN)
LU CHAO (CN)
XIE XIAORONG (CN)
WEI YINGDONG (CN)
LI ZENGQIN (CN)
LI XIAOQIAN (CN)
LI MINGRUI (CN)
ZHANG SHUQING (CN)
LU CHAO (CN)
XIE XIAORONG (CN)
Application Number:
PCT/CN2020/102122
Publication Date:
October 07, 2021
Filing Date:
July 15, 2020
Export Citation:
Assignee:
CHINA RAILWAY ELECTRIFICATION BUREAU GROUP CO LTD (CN)
UNIV TSINGHUA (CN)
CHINA RAILWAY ELECTRICAL IND CO LTD (CN)
UNIV TSINGHUA (CN)
CHINA RAILWAY ELECTRICAL IND CO LTD (CN)
International Classes:
H02M5/42
Foreign References:
| CN105470958A | 2016-04-06 | |||
| CN103972920A | 2014-08-06 | |||
| CN109728592A | 2019-05-07 | |||
| CN108400715A | 2018-08-14 | |||
| CN109050352A | 2018-12-21 | |||
| JP2016123159A | 2016-07-07 | |||
| CN201611056799A | 2016-11-25 | |||
| CN201310227591A | 2013-06-08 | |||
| CN201010597237A | 2010-12-10 | |||
| CN201811313066A | 2018-11-06 | |||
| CN200710175253A | 2007-09-28 |
Other References:
CHANG, FEI : "Research on Cascaded H-bridge Structure for a New Traction Power Supply System", POWER ELECTRONICS, vol. 38, no. 12, 31 December 2016 (2016-12-31), CN , pages 92 - 93, 96, XP009531058, ISSN: 1000-100X
I. KRASTEVP. TRICOLIS. HILLMANSENM. CHEN: "Future of Electric Railways: Advanced Electrification Systems with Static Converters for ac Railways", IEEE ELECTRIFICATION MAGAZINE, vol. 4, no. 3, September 2016 (2016-09-01), pages 6 - 14, XP011621701, DOI: 10.1109/MELE.2016.2584998
WINKELNKEMPER MKORN ASTEIMER P: "A modular direct converter for transformerless rail interties [A", IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS [C, 2010, pages 562 - 567, XP031803419
NAMI, A. ET AL.: "Modular Multilevel Converters for HVDC Applications: Review on Converter Cells and Functionalities", IEEE TRANSACTIONS ON POWER ELECTRONICS, vol. 30, no. 1, 2015, pages 18 - 36, XP011557523, DOI: 10.1109/TPEL.2014.2327641
See also references of EP 4131762A4
I. KRASTEVP. TRICOLIS. HILLMANSENM. CHEN: "Future of Electric Railways: Advanced Electrification Systems with Static Converters for ac Railways", IEEE ELECTRIFICATION MAGAZINE, vol. 4, no. 3, September 2016 (2016-09-01), pages 6 - 14, XP011621701, DOI: 10.1109/MELE.2016.2584998
WINKELNKEMPER MKORN ASTEIMER P: "A modular direct converter for transformerless rail interties [A", IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS [C, 2010, pages 562 - 567, XP031803419
NAMI, A. ET AL.: "Modular Multilevel Converters for HVDC Applications: Review on Converter Cells and Functionalities", IEEE TRANSACTIONS ON POWER ELECTRONICS, vol. 30, no. 1, 2015, pages 18 - 36, XP011557523, DOI: 10.1109/TPEL.2014.2327641
See also references of EP 4131762A4
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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