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Urban rail transit traction load modeling method and system and storage medium

A technology for urban rail transit and traction loads, applied in instrumentation, design optimization/simulation, calculation, etc., can solve problems such as poor accuracy and reliability, and poor practicability

Pending Publication Date: 2019-09-17
北京寰净宇能科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the embodiment of the present invention provides a traction load modeling method, system and storage medium of urban rail transit to solve the problems of poor accuracy, reliability and poor practicability of the existing traction load modeling method

Method used

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  • Urban rail transit traction load modeling method and system and storage medium
  • Urban rail transit traction load modeling method and system and storage medium
  • Urban rail transit traction load modeling method and system and storage medium

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Experimental program
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Embodiment 1

[0054] Such as figure 1 As shown, the present embodiment proposes a method for modeling urban rail transit traction load, which method includes:

[0055] S100. Using a cosine function model to describe the tracking interval δ(t) of the first vehicle at time t.

[0056] Further, using the cosine function model to describe the tracking interval δ(t) of the first train at time t also includes: fitting according to the change of the measured tracking interval data of the train with time, and establishing a cosine function model. Such as figure 2 As shown, the measured value refers to the measured tracking interval data of the train, and the fitted value refers to the train tracking interval obtained by fitting the cosine function model. The tracking interval characteristics of urban rail transit trains are analyzed through the measured value data, and the fitting method is obtained. The change of train tracking interval with time can be described by cosine function.

[0057] F...

Embodiment 2

[0089] Corresponding to the above-mentioned embodiment 1, this embodiment proposes a traction load modeling system for urban rail transit, and the system includes:

[0090] The tracking interval fitting unit is used to describe the tracking interval δ(t) of the first vehicle at time t using a cosine function model;

[0091] Use the random number Δh that satisfies the Cauchy distribution to correct the train tracking interval δ(t) to obtain the corrected tracking interval δ(t)+Δh;

[0092] Make t=t+(δ(t)+Δh) into the cosine function model to obtain the tracking interval of the next train;

[0093] Calculate and obtain the corrected tracking intervals of all the trains passing by that day in turn;

[0094] The traction load superimposition unit is used to define the power supply zone by using the sliding time window T, and retrieve the trains running in the power supply zone according to the corrected tracking intervals of all the trains passing by that day;

[0095] The opera...

Embodiment 3

[0098] Corresponding to the above-mentioned embodiment 1, this embodiment proposes a computer storage medium, which contains one or more program instructions, and one or more program instructions are used to execute a kind of urban track as in embodiment 1. Modeling of traffic traction loads.

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Abstract

The embodiment of the invention discloses an urban rail transit traction load modeling method and system and a storage medium. The urban rail transit traction load modeling method and system are characterized in that random traction load simulation is realized based on a train dynamic tracking interval; tracking interval characteristics of the urban rail transit train are analyzed through the actually measured data; the change of the train tracking interval along with time is obtained through a fitting method and can be described by a cosine function; through comparing a train tracking interval represented by a cosine function with an actual train tracking interval, fluctuation obeying Cauchy distribution of the train tracking interval is obtained; a random number generated by the Cauchy distribution density function can represent randomness in a train running process; train operation can be indexed through time, and a sliding time window is established, and a train operating in a power supply partition is retrieved, and traction power of the train in the window is superposed; and the urban rail transit traction load modeling method can accurately describe distribution characteristics of urban rail traction loads, and the model structure is simple, and parameter meaning is clear, and the model has good practicability.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of urban rail transit traction power supply, and in particular to a method, system and storage medium for modeling urban rail transit traction load. Background technique [0002] Urban rail transit has developed rapidly in my country in recent years. Due to many advantages such as strong transport capacity, energy saving and environmental protection, and high energy efficiency, domestic rail transit has broad application prospects, especially suburban and intercity traffic. With the increase of train volume and speed, the impact of traction load on urban power grid cannot be ignored. Among many related studies, traction load modeling is a basic and necessary technical means for the analysis of electrified railway operation. [0003] There are three main types of traction load modeling methods: constant current method, average capacity method and operation diagram method. The constant c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 孙振海杨少兵赵叶辉刘辉房金萍龚兆丰郭志强臧红军郑丛梅张艳龙刘尧
Owner 北京寰净宇能科技有限公司