Impedance calculation method of return-wire direct feeding mode tunnel traction network

A power supply method and impedance calculation technology, which can be applied to overhead lines, installations along the running track, transportation and packaging, etc., can solve problems such as increasing complexity, and achieve the effect of reducing complexity

Inactive Publication Date: 2016-11-09
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

Since the traction power supply system is a complex multi-conductor transmission system composed of the contact wire and the catenary cable as the transmission conductor, and the

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  • Impedance calculation method of return-wire direct feeding mode tunnel traction network
  • Impedance calculation method of return-wire direct feeding mode tunnel traction network
  • Impedance calculation method of return-wire direct feeding mode tunnel traction network

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] The invention proposes a new method for calculating the traction network impedance. The method is based on the loop method for multi-conductor transmission systems. Taking the single-line tunnel traction network with no integrated ground wire and adopting the direct power supply mode with return line as an example, the corresponding distribution coefficient of each circuit and the calculation process of integrated impedance are described in detail.

[0016] figure 1 Schematic diagram showing the layout of a single-line tunnel traction network for the direct power supply method with return flow lines. In the figure, it is assumed that the contact line as the transmission conductor and the rail 1, the rail 2, the return line and the earth as the return conductor constitute the circuit 1, the circuit 2, the circuit 3 and the circuit 4 respectively; The...

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Abstract

The invention discloses an impedance calculation method of a return-wire direct feeding mode tunnel traction network. The impedance calculation method is applied in a return-wire direct feeding mode traction power supply system inside an electric railway tunnel; all conductors participating in transmission and backflow of the traction power supply system including the earth inside the tunnel are taken into consideration; after the conductors inside the traction network system are classified according to the transmission and backflow functions, every two different conductors participating in transmission and backflow form a loop; and the self impedance of each loop and mutual impedance among different loops are deduced and calculated according to the radius of each conductor forming the loop and space relative distance parameters, an impedance matrix is solved to obtain the current distribution coefficient of each loop, then the system comprehensive impedance is obtained, and finally the return-wire direct feeding mode impedance parameter is obtained. The method is based on the subsistent loops of the system, the complex conditions caused by a model constructed with the earth as the reference conductor in the prior art are avoided, the calculation complexity is reduced, and the current distribution coefficient of each loop of the traction network can be obtained.

Description

technical field [0001] The invention relates to a calculation method of electrical parameters of a traction network in an electrified railway tunnel and a traction power supply system adopting a direct power supply mode with return lines, in particular to a calculation method of impedance. Background technique [0002] With the development of my country's electrified railway, it is more urgent and necessary to carry out basic theoretical research on electrified railway. Among them, the accurate description of the mathematical model of electrified railway traction network and the accurate grasp of electrical parameters are the prerequisites for the development of traction power supply system research. The complex traction power supply system, such as the direct power supply method with return lines, including contact lines, catenary cables, return lines and steel rails, forms a complex electromagnetic field structure and relationship; while direct power supply with return line...

Claims

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Application Information

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IPC IPC(8): B60M1/13B60M7/00
CPCB60M1/13B60M7/00
Inventor 刘志刚邓云川黄可宋小翠成业
Owner SOUTHWEST JIAOTONG UNIV
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