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4 results on '"Cao, Jian-Gang"'

1. Analysis and Suppression of Electromagnetic Compatibility of High Speed Railway Traction Current Harmonic to Track Circuit

Author

Feng Jian and Cao Jian Gang

Subjects
Computer science, 020208 electrical & electronic engineering, Electromagnetic compatibility, Topology (electrical circuits), 02 engineering and technology, Track circuit, law.invention, Harmonic analysis, Rectifier, Electromagnetic coil, law, Electric locomotive, 0202 electrical engineering, electronic engineering, information engineering, Harmonic, Electronic engineering
Abstract

With the construction of high-speed railway and passenger dedicated line, the electric locomotive and power supply return system are becoming more and more complex, and the interference to the track circuit is more and more. In order to reduce the influence of the harmonic current on the EMC of the track circuit, this paper proposes a method based on the multiple control strategy. Firstly, the structure and topology of multichannel control rectifier are introduced, and then the influence of carrier modulation and carrier drift on harmonic voltage and current of train is analyzed in detail. Finally, the effectiveness of harmonic analysis method and harmonic suppression method is verified by simulation and experiment.

Published
2020

2. Harmonic Analysis and Suppression Method of Train Network Side Based on Multiplex Control Strategy

Author

Cao Jian gang and Feng Jian

Subjects
Computer science, 020209 energy, 020208 electrical & electronic engineering, Control (management), Topology (electrical circuits), Carrier shift, 02 engineering and technology, Harmonic analysis, Rectifier, Harmonics, Electric locomotive, 0202 electrical engineering, electronic engineering, information engineering, Harmonic, Electronic engineering
Abstract

This is the paper style requirement for the Chinese Control Conference. The writers of papers should and must provide normalized electronic documents in order for readers to search and read papers conveniently. In order to reduce the harmonics pollution by AC drive electric locomotive and EMU in traction power supply, this paper presents a side harmonic suppression method for train network based on multiple control strategy. Firstly, the structure and topology of multiplex control rectifier are introduced, then the influence of carrier modulation and carrier shift on train harmonic voltage and current is analyzed in detail. Finally, the validity of the harmonic analysis method and the effectiveness of the harmonic suppression method are verified by simulation and experiment.

Published
2019

3. Study on the Application and Control Strategy of SMES System in EMU.

Author

Feng, Jian, Cao, Jian Gang, and Wu, Zhi Hao

Subjects
*OVERVOLTAGE, *TEST interpretation, *VOLTAGE control, *HARMONIC analysis (Mathematics), *HEURISTIC algorithms, *TRANSIENT analysis
Abstract

In this paper, the application of SMES system in the electrical multiple unit (EMU) was studied. With a new type of SMES rectifier and its novel control strategy, the EMU could immune through the over-phase region from the power off. The overvoltage impact on the related equipment due to the frequent power switch could also be reduced. With the combination of the DQ current decoupling control and transient direct control, the output power quality of the motor train grid side was obviously improved and the voltage adjustment time was significantly improved. The grid side harmonic was also suppressed, and the harmonic content was obviously reduced. All advantages on the dynamic response abilities presented above had been verified by the simulation and test results in this paper. [ABSTRACT FROM AUTHOR]

Published
2019
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4. Analysis and Study of the Influence on the Train Side Harmonic as a SMES Fabricated Into the EMU Converter System.

Author

Feng, Jian, Cao, Jian Gang, and Wu, Zhi Hao

Subjects
*MAGNETIC energy storage, *ELECTRIC drives, *CONTINUOUS functions, *ELECTRIC inductance, *ELECTRIC locomotives, *HIGH speed trains
Abstract

Due to the dynamic performance and continuous function of superconducting magnetic energy storage (SMES), the SMES was fabricated into the electrical multiple unit (EMU) high-speed train traction converter system. The pollution of harmonic current from ac drive electric locomotives was an essential problem to analyze. To settle this problem, first, the influence of SMES technology in the current harmonic of train grid side was studied, in which the current analysis method was used and a harmonic suppression scheme was proposed. Next, the effects of harmonic frequency characteristics and amplitude characteristics on the current harmonic were analyzed, with adjusting the carrier frequency and increasing the leakage inductance of the traction transformer. Finally, the accuracy of the theoretical analysis method is verified by the simulation analysis and experimental verification. The results showed that the new type superconductivity technology proposed could optimize the train side harmonic current remarkably. [ABSTRACT FROM AUTHOR]

Published
2019
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