An Automatic System for China High-speed Multiple Unit Train Running Through Neutral Section with Electric Load

Han, Zhengqing; Liu, Shuping; Gao, Shibin

doi:10.1109/appeec.2010.5448394

Cited by 13 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A. Theocharis and M. Popov believed that line distributed capacitance becomes an important factor affecting the transient process of overvoltage [6]. Erik K. Saathoff obtained the effect of the closed phase angle on overvoltage and inrush current [7]. Goertz et al obtained the influence law of the capacitance-effect voltage polarity, peak value, and overvoltage wavefront time of power cables, proposing the most critical factors for the configuration of the cable in the HVDC system [8,9].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Analysis of Overvoltage and Inrush Current Characteristics of the Electric Rail Traction Power Supply System

Sun

Fan

et al. 2022

Energies

View full text Add to dashboard Cite

High-speed EMUs (electric multiple-units) frequently pass through the phase-separation zone during operation. Overvoltage generated during the operation of the vehicle-mounted circuit breaker has a long duration and high waveform steepness, which accelerates the service life of the vehicle-mounted equipment and is likely to cause insulation failures. For the above-mentioned problems, the operating overvoltage characteristics of high-speed EMU were obtained by traction substation-catenary-EMUs system (SCES) analysis and experiments, thus deriving the influences of the closed phase angle and the residual magnetism of the vehicle-mounted transformer on operating overvoltage. The results showed that the voltage phase of the catenary significantly affected the operating overvoltage, and the closed switching overvoltage was small at 0–40°, 140–210° and 320–350°. The voltage on the primary side of the vehicle-mounted transformer was 60.78 kV, with the transient impact of high-frequency oscillation overvoltage of 22.71 kV, and an initial period of oscillation of 0.01 ms. Then, the period became longer, and it took 0.5 ms for the high-frequency oscillation from attenuation to disappearance. Finally, a scheme of series reactance suppression devices was proposed to protect vehicle-mounted voltage transformers. This work is to provide data support for the insulation design and system protection of a traction power supply system.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Analysis of Overvoltage and Inrush Current Characteristics of the Electric Rail Traction Power Supply System

Sun

Fan

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

“…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).…”

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

View full text Add to dashboard Cite

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.

show abstract

“…In the traction substation, the voltage of the three-phase grid is transformed into two-phase voltage by a transformer [3]. Due to the differences of phase, amplitude and frequency of the voltage between the adjacent arms α1 and β1 (α2 and β2), neutral sections must be set between the adjacent arms [4]. There are mainly three problems caused by neutral sections: power quality issues such as unbalance, reactive power and low-order harmonics; disturbance between locomotive and network; speed loss of the locomotive.…”

Section: Introductionmentioning

confidence: 99%

A Traction Three-Phase to Single-Phase Cascade Converter Substation in an Advanced Traction Power Supply System

Guo

et al. 2015

Energies

View full text Add to dashboard Cite

Abstract:The advanced traction power supply system (ATPSS) is a new directional development for traction power supply systems, which can totally remove the neutral sections and effectively promote power quality. However, the existing converters suffer from small substation capacity. In this paper, a new configuration based on a three-level neutral point clamped (3L-NPC) three-phase to single-phase cascade converter in a substation is proposed for ATPSS, which can be used to match the capacity of the converter for high voltage and large power applications. The control strategy of the proposed converter is analyzed in depth, and the phase disposition sinusoidal pulse width modulation (PD-SPWM) with phase shift carrier SPWM (PSC-SPWM) is employed in the inverters. Then, the inductance equalizing circuit is applied for the voltage balance on the DC-link. Besides, a LC filter circuit is designed to eliminate the double line-frequency ripple of DC voltage. Afterwards, a simulation model and an experimental prototype are developed, respectively. The simulation results show that the proposed converter in this paper can not only meet the requirements of voltage and capacity for the traction network, but also improve power quality. Finally, the experimental results verify the correctness and feasibility of the proposed control strategy. OPEN ACCESSEnergies 2015, 8 9916

show abstract

An Automatic System for China High-speed Multiple Unit Train Running Through Neutral Section with Electric Load

Cited by 13 publications

References 0 publications

Modeling and Experimental Analysis of Overvoltage and Inrush Current Characteristics of the Electric Rail Traction Power Supply System

Modeling and Experimental Analysis of Overvoltage and Inrush Current Characteristics of the Electric Rail Traction Power Supply System

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

A Traction Three-Phase to Single-Phase Cascade Converter Substation in an Advanced Traction Power Supply System

Contact Info

Product

Resources

About