Dynamic simulation of rail potential considering rail skin effect

Zhou, Linjie; Liu, Wei; Li, Siwen; Tang, Yu; Pan, Zhe; Bhatti, Ashfaque Ahmed; Ma, Qiang

doi:10.1016/j.ijepes.2023.109340

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…Hence, the characteristic curve resembles the power source model, which can be expressed as (5). P ac is the active power of the grid side, which can be expressed by the d-axis voltage e d and the d-axis current i d as (6). Neglecting the transmission loss and the impedance of the converter, the DC power P dc is equal to P ac [26].…”

Section: Constant Power Working Regionmentioning

confidence: 99%

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Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Zhang,

Zhou

et al. 2023

Energies

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The energy feedback system (EFS) is widely accepted to utilize the regenerative braking energy (RBE) in an urban rail traction power supply system (TPSS). However, the sharing relationship of RBE between EFS, traction trains and on-board braking resistors is not clear. In addition, the impact of EFS operation on the sharing of RBE has been rarely studied. This paper proposed a hierarchical operation optimization method for improving the utilization of shared RBE in TPSS through the EFS. An optimizing model for the dynamic start-up voltage threshold of EFS is established, with the objective of minimizing TPSS power consumption. A fast prediction model of train operation information is developed to analyze the steady-state power flow in advance. The optimal solution is searched using a salp swarm algorithm (SSA) on a per second basis. A microsystem of three traction stations and two trains is analyzed. Compared to the conventional constant voltage operation scheme, the optimal solution achieves a maximum additional energy-saving efficiency improvement of 2.44%. Efficient sharing of RBE is identified as the key to achieving energy savings. Regarding the local control part, system stability analysis is verified. Real-time simulation results indicate that the dynamic operating mode of EFS efficiently distributes RBE.

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Section: Constant Power Working Regionmentioning

confidence: 99%

“…The main substations (MS) are powered by the grid and transform AC 110 kV to AC 35 kV. The energy-saving and cost advantages of the EFS made it widely accepted in the industry [6][7][8]. This paper will primarily focus on the urban rail TPSS with EFS, disregarding friction braking.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Zhang,

Zhou

et al. 2023

Energies

Self Cite

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Electroplasticity effects: from mechanism to application

Liu,

Jia,

et al. 2023

Int J Adv Manuf Technol

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Analysis of Rail Potential and Stray Current with an Unified Chain Model of Dual Traction Power Supply System

Bhatti,

Liu,

Yang

et al. 2024

Urban Rail Transit

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In dual traction power supply systems, the overhead catenary system operates in different power supply modes. It passes across the AC section, DC section, and a neutral part, which influences the features and properties of the feedback current and aggregates its effects on stray current and rail potential. This research paper presents an integrated model of an AC and DC traction power system (TPS), along with a unified chain equivalent circuit model, the ground wire through the AC section, and the insulation joints fixed in the AC–DC neutral section under different operating positions. To make a unified impedance and admittance matrix for traction network, a virtual conductor wire has been added in the DC section to make the balance order of the TPS. The influence of reflex system configuration on rail potential, stray current, and distribution of rail potential at AC and DC stations has also been calculated. The simulation results demonstrate that establishing the insulation joints in the AC–DC section and using ground wires in the AC part can significantly decrease the stray current and rail potential.

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Dynamic simulation of rail potential considering rail skin effect

Cited by 4 publications

References 20 publications

Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

Electroplasticity effects: from mechanism to application

Analysis of Rail Potential and Stray Current with an Unified Chain Model of Dual Traction Power Supply System

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