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Short-circuit fault mathematical modeling and short-circuit current determining method for rail direct-current power supply system

A power supply system, short-circuit fault technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that the value of short-circuit current cannot be obtained, the calculation result has large errors, etc., and achieve high flexibility and universal application Sexuality, accurate and reliable results

Active Publication Date: 2015-03-25
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the equivalent simplified circuit diagram method cannot obtain accur

Method used

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  • Short-circuit fault mathematical modeling and short-circuit current determining method for rail direct-current power supply system
  • Short-circuit fault mathematical modeling and short-circuit current determining method for rail direct-current power supply system
  • Short-circuit fault mathematical modeling and short-circuit current determining method for rail direct-current power supply system

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Effect test

Embodiment 1

[0056] Please refer to figure 1 , figure 1 A flow chart of the process of a mathematical modeling method for a short-circuit fault of a track DC power supply system provided by the present invention, the method includes:

[0057] Step s101: preset N traction substations, there is a short-circuit node on the uplink catenary, downlink catenary, uprail and downlink rail between two adjacent traction substations, and the traction substation at the head end of the line The position coordinates of the line are the origin of the coordinates, and the direction from the beginning of the line to the end is the positive direction of the coordinate axis. The N traction substation nodes are numbered according to the order in which the position coordinates are small to large and the same position coordinates first ascend the catenary and then ascend the rails , whose number ranges from 1 to 2N, and then according to the order of the position coordinates from small to large and the same pos...

Embodiment 2

[0094] Please refer to Figure 4 , Figure 4 For this embodiment, on the basis of the method for determining the short-circuit current of the rail DC power supply system provided in the previous embodiment, another method for determining the short-circuit current of the rail DC power supply system is provided. This embodiment includes:

[0095] Step s301: receiving the short-circuit node location and short-circuit type corresponding to the short-circuit fault;

[0096] Step s302: Determine the type of short-circuit location corresponding to the short-circuit fault according to the location of the short-circuit node;

[0097] Step s303: According to the location of the short-circuit node and the type of the short-circuit location, determine the node number corresponding to the location of the short-circuit point in the mathematical model of the normal state of the track DC power supply system including the short-circuit node;

[0098] In this embodiment, the node numbers of t...

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Abstract

The invention discloses a short-circuit fault mathematical modeling method for a rail direct-current power supply system. The method includes the steps of arranging N traction substations in advance, wherein short-circuit nodes are arranged on an uplink contact net, a downlink contact net, an uplink steel rail and a downlink steel rail between every two adjacent traction substations respectively; numbering nodes of the traction substations and the short-circuit nodes, and sequentially storing the node numbers in corresponding arrays according to the small-to-large sequence of position coordinates of lines where the nodes are located; calculating self-admittance of all the nodes stored in the arrays and the nodes at the two ends of the N traction substations and mutual admittance between the nodes, and storing the results to a node admittance matrix; calculating equivalent voltage source amplitude values of the N traction substations and node current column vectors of corresponding internal resistors of the N traction substations; constructing a node admittance network equation, in the normal state, of the rail direct-current power supply system comprising the short-circuit nodes.

Description

technical field [0001] The invention relates to the technical field of rail direct current power supply systems, in particular to a mathematical modeling method for a short-circuit fault of a rail direct current power supply system and a method for determining a short-circuit current. Background technique [0002] With the rapid development of my country's national economy and the growth of urban traffic, urban rail transit, as a new means of transportation, has gained more and more popularity in my country because of its high speed, safety, reliability, punctuality, convenience, and pollution-free. application. As an important part of urban rail transportation, the power supply system of urban rail DC traffic is the source of power for the operation of urban rail DC traffic. It needs to meet the basic requirements of safety, reliability, practicability, economy and advancement. Therefore, the urban rail DC Whether the design of traffic power supply system is reasonable or n...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张杰王坚陈华国李江红范祝霞何海兴张宇李卫红
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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