Study on feeder protection on the condition of EMU passing by phase-separation with electric load in High-speed Railway

Jian-zhong, Wei; Guo, Xiaoxu; Han, Zhengqing; Gao, Shibin

doi:10.1109/apap.2011.6180510

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…As is known, neutral sections are set every 20-30 km to realize phase switching for balancing three-phase load (Han et al, 2010). Some researchers paid much attention to the over-voltage on the pantograph or catenary and the inrush current at the reclose moment (Gao et al, 2011;Wei et al, 2011). Wang et al (2011) from Beijing Jiaotong University proposed that over-voltage on the pantograph can be avoided by replacing traditional mechanical switch with power electronic switch.…”

Section: Introductionmentioning

confidence: 99%

Control simulation of PMSM traction system of high speed train when passing neutral section

Huang

Yao

et al. 2016

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose – In electric system of high-speed trains, neutral sections are set to balance the three-phase load. When passing neutral sections, the train should detach from the power supply for a short time. To permanent magnet synchronous motors (PMSMs) traction system, the voltage of DC link will increase quickly due to the back-EMF of PMSM during this time. Although the energy consumption braking method can be adopted to consume the feedback energy. It not only wastes energy, but also causes more speed drop of the train. The paper aims to discuss these issues. Design/methodology/approach – In order to get better performance when the train is under passing neutral section condition, a suitable control method is proposed, in which the torque command is set to zero and d-axis current order remains unchanged during passing neutral section. Based on a co-simulation model, the influences of this method on the PMSMs traction system are compared with that of traditional method, which is used in induction motors traction system. This model combines both control strategy and finite element model of motor, which can take the effects of magnetic saturation and power loss into consideration. Findings – In PMSMs traction system, PMSMs work as generators during neutral section, and charge to DC bus, which may cause over-voltage damage. Moreover, there would be strong torque shock at the moment of power cut-off. It is finally found that, with the suitable control method, the high-speed train can pass the neutral section with less speed drop, less torque shock and little DC link voltage rise. Originality/value – The control method proposed in this paper is easier to achieve and gets a better performance of PMSMs traction system in high-speed train compared with the traditional method. Furthermore, the co-simulation model is much closer to reality than the analytical model.

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Section: Introductionmentioning

confidence: 99%

Control simulation of PMSM traction system of high speed train when passing neutral section

Huang

Yao

et al. 2016

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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show abstract

“…In order to solve these problems, various methods had been put forward. In [5], vacuum circuit breaker with parallel resistance is proposed to accelerate the decay of over voltage and current, but it cannot reduce the amplitude of over voltage and current. In [6], inverse paralleled thyristor switch is used to replace traditional vacuum breaker, which can reduce power supply dead zone to 30ms.…”

Section: Introductionmentioning

confidence: 99%

Research on Novel Uninterruptible Flexible Connector Device for Phase Separation in Electrified Railways

Wei

Jiang

2012

AMR

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Loss and recovery of power supply to electrified locomotives when passing neutral section will caused over voltage and over current in locomotives, which greatly threatens the safety of electrified railways and passengers. A novel uninterruptible flexible connector device is proposed, which comprises of two breakers, back-to-back converters and two transformers. This device can realize flexible switch between voltages of two traction feeders using phase shift technology at variable frequency and make locomotives run pass neutral section at rated power. System configuration, working principle, system-level and device-level control of uninterruptible flexible connector device are introduced and their correctness and effectiveness are validated through simulation.

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Performance and control method of PMSMs traction system in high speed train under passing neutral section condition

Huang

Yao

et al. 2015

2015 18th International Conference on Electrical Machines and Systems (ICEMS)

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Study on feeder protection on the condition of EMU passing by phase-separation with electric load in High-speed Railway

Cited by 4 publications

References 6 publications

Control simulation of PMSM traction system of high speed train when passing neutral section

Control simulation of PMSM traction system of high speed train when passing neutral section

Research on Novel Uninterruptible Flexible Connector Device for Phase Separation in Electrified Railways

Performance and control method of PMSMs traction system in high speed train under passing neutral section condition

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