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Mathematical Modeling of Short-Circuit Fault and Determination Method of Short-circuit Current in Track DC Power Supply System

A technology of power supply system and short-circuit current, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as large error in calculation results, inability to obtain short-circuit current values, etc., and achieve accurate, reliable, and highly flexible results. Effects of Sexuality and Universal Applicability

Active Publication Date: 2018-03-23
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the equivalent simplified circuit diagram method cannot obtain accurate short-circuit current values, and the calculation results have large errors.

Method used

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  • Mathematical Modeling of Short-Circuit Fault and Determination Method of Short-circuit Current in Track DC Power Supply System
  • Mathematical Modeling of Short-Circuit Fault and Determination Method of Short-circuit Current in Track DC Power Supply System
  • Mathematical Modeling of Short-Circuit Fault and Determination Method of Short-circuit Current in Track DC Power Supply System

Examples

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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 mathematical modeling method for a short-circuit fault of a rail direct current power supply system, which includes preset N traction substations, the uplink catenary, the downlink catenary, the uplink rail and the downlink rail between two adjacent traction substations. There is a short-circuit node, number the traction substation node and the short-circuit node, and store the node numbers in the corresponding array according to the order of the line position coordinates of the node from small to large; calculate each node stored in the array and N The self-admittance of the nodes at both ends of a traction substation and the mutual admittance between each node, and store the results in the node admittance matrix; calculate the equivalent voltage source amplitude and its corresponding internal resistance of N traction substations Node current column vector; construct the node admittance network equation under the normal state of the track DC power supply system including the short-circuit node.

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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Patent Type & Authority Patents(China)
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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