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Heavy haul railway AT power supply capacity calculation method

A technology of power supply capacity and calculation method, applied in power lines, transportation and packaging, vehicle components, etc., can solve problems such as unfavorable transformation, low utilization rate of train regenerative braking energy, and speed drop

Inactive Publication Date: 2021-05-07
樊衍
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still some deficiencies in the traction power supply system of heavy-duty railways, mainly reflected in: ①The catenary network voltage is low; ②The traction substation is seriously overloaded; The power factor is low; ④The train loses speed when the train is over-powered and phase-separated, and the power supply capacity of the traction power supply system is limited; ⑤The negative sequence problem caused by the train operation; ⑥The utilization rate of the regenerative braking energy of the train is low
[0004] There is no good calculation method to calculate the power supply capacity of the existing autotransformer (AT) power supply mode, which is not conducive to its transformation to overcome the above shortcomings

Method used

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  • Heavy haul railway AT power supply capacity calculation method
  • Heavy haul railway AT power supply capacity calculation method
  • Heavy haul railway AT power supply capacity calculation method

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Embodiment Construction

[0046] Attached below Figure 1-5 The specific implementation manner of the present invention will be described in further detail.

[0047] Example, by Figure 1-5 Given, the present invention provides a calculation method for AT power supply capacity of heavy-duty railways, including the calculation of CTN current and voltage distribution and power supply capacity. The CTN current and voltage distribution: when supplying power to locomotives in the AT traction network, figure 1 The current direction of the traction cables C1 and C2 is opposite and the magnitude is the same, so the mutual impedance between the traction cable and the AT catenary can be ignored. For the convenience of analysis, the leakage reactance of the AT in the CTN is ignored, and the figure 1 Simplified to figure 2 The equivalent circuit shown is that the 2×27.5kV AT network is equivalent to a 27.5kV network, including the traction cable circuit and catenary equivalent circuit, and the simplified equiva...

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Abstract

The invention relates to a heavy haul railway AT power supply capacity calculation method; when the method is used, an AT power supply heavy haul railway traction cable cut-through power supply scheme is calculated, mathematical models of CTN equivalent impedance, current distribution, voltage loss, CTN tail end network voltage and other electrical parameters are deduced, then the calculation method of the power supply distance is obtained, and the power supply capacity of the scheme is judged. The current heavy haul railway AT power supply scheme is convenient to reform, so that the current heavy haul railway AT power supply system has greatly reduced electric split phases, improved power supply capability and prolonged power supply distance, the operation of a locomotive is safer and more reliable, and the operation speed is improved.

Description

technical field [0001] The invention relates to heavy-duty railways, in particular to a calculation method for AT power supply capacity of heavy-duty railways. Background technique [0002] The traction cable penetration power supply system powered by AT is composed of two parts: MSS (MainSubStation) and CTN. [0003] Heavy-haul railways have large traction load power and high demand for transmission power of the traction network. Therefore, there are higher requirements for the power supply capacity and power transmission reliability of the traction power supply system. There are mainly two power supply methods for heavy-haul railways in my country: direct supply with return line and autotransformer (AT) power supply. At present, there are still some deficiencies in the traction power supply system of heavy-duty railways, which are mainly reflected in: ①The catenary network voltage is low; ②The traction substation is seriously overloaded; The power factor is low; ④The tra...

Claims

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Application Information

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IPC IPC(8): B60M3/00
CPCB60M3/00
Inventor 樊衍
Owner 樊衍
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