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Method for evaluating load of traction substation of electric railway

A technology for traction substations and electrified railways, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as inability to reflect volatility and randomness

Inactive Publication Date: 2010-12-15
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to propose an electrified railway traction load analysis in which only one fixed load (i.e. active power and reactive power remains unchanged) is used to describe the traction load, which cannot reflect its volatility and randomness. The evaluation method of railway traction substation load, through direct statistics and analysis of the distribution law of all active power and reactive power of traction substation, builds the load probability model of traction substation, and uses simulated annealing algorithm for parameter identification, realizes the Description of substation load

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  • Method for evaluating load of traction substation of electric railway
  • Method for evaluating load of traction substation of electric railway
  • Method for evaluating load of traction substation of electric railway

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[0043] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0044] figure 1 It is a flow chart of the evaluation method for traction substation load of electrified railway. figure 1 Among them, the method provided by the invention comprises:

[0045] Step 1: Construct the active power probability model of the electric locomotive in the traction substation.

[0046] The power supply section of the traction substation is generally 40-60km, and the slope, curve, speed limit and other conditions of the line in the section are relatively stable. Therefore, the output of a single train in a fixed section is often concentrated in several power intervals. When the sample size is large enough, the active power approximately obeys the normal distribution in these intervals. figure 2...

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Abstract

The invention discloses a method for evaluating the load of a traction substation of an electric railway, belonging to the technical field of load evaluation of a power system and a traction power supply system. The invention aims at solving the problem that the fluctuation and the random cannot be reflected in the current load analysis. The invention adopts the technical scheme that the method comprises the following steps of: constructing an active power probability model of an electric locomotive of the traction substation and identifying an active power probability model parameter by using a simulated annealing algorithm; and constructing a passive power probability model of the electric locomotive of the traction substation and identifying a passive power probability model parameter by using the simulated annealing algorithm and authenticating the load probability model of the traction substation, wherein the active power probability model is constructed according to the vehicle-driving quantity and the power generated by each electric locomotive. The invention describes the statistic characteristic of the active power and the passive power of the traction substation and can be directly used for probabilistic load flow calculation or providing load data for simulation analysis of the power system.

Description

technical field [0001] The invention belongs to the technical field of load evaluation of electric power systems and traction power supply systems, and in particular relates to a load evaluation method of electrified railway traction substations. Background technique [0002] With the rapid construction of electrified railways and the large number of high-power electric locomotives and high-speed EMUs running online, the interaction between electrified railways and power systems has attracted increasing attention. Constructing the load model of traction substation is of great significance for electrified railway load forecasting, power quality analysis and power grid operation optimization. [0003] The biggest characteristic of the traction load is random fluctuation, which makes it very difficult to accurately describe the traction load. There are not many studies on traction load modeling at home and abroad. Document 1 (written by Kang Gu. Markwalt, translated by Yuan Z...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/18G06F19/00
CPCY02E40/30
Inventor 杨少兵吴命利
Owner BEIJING JIAOTONG UNIV
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