Novel feeder line distance protection method for high-speed trains

A distance protection and feeder technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as overload tripping, inability to distinguish between overload and fault, and reliability of relay protection

Active Publication Date: 2017-09-19
CHENGDU SOUTHWEST JIAOTONG UNIV XUJI ELECTRIC
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  • Application Information

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Problems solved by technology

However, the load of high-speed railways is very different from that of traditional ordinary-speed railways. In particular, high-speed railway locomotives adopt the AC-DC power supply mode, which basically does not contain low-order harmonics. When the load

Method used

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  • Novel feeder line distance protection method for high-speed trains
  • Novel feeder line distance protection method for high-speed trains

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Embodiment 1

[0038] A novel feeder distance protection method suitable for high-speed rail, comprising the following steps:

[0039] Step A. Obtain the action area of ​​feeder distance protection: obtain the action area of ​​feeder distance protection according to the high-speed rail power supply system;

[0040] Step B. Obtain the blocking distance protection area:

[0041] By finding out the minimum overload impedance setting angle Ф1, the maximum overload impedance setting angle Ф2, the overload locking lock value Zr, the corner line of the minimum overload impedance setting angle Ф1 is side A, and the maximum overload impedance setting angle Ф1 in the feeder distance protection action area. The corner line of the impedance setting angle Ф2 is side B, and the triangular area formed after the intersection of side A and side B with the feeder distance protection action area is the pre-blocking distance protection area, and then the fan shape obtained by taking the overload locking value Z...

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Abstract

The invention discloses a novel feeder line distance protection method for high speed trains. The method includes the following steps that: step A, a feeder line distance protection action region is obtained: the feeder line distance protection action region is obtained according to a high-speed train power supply system; step B, a lockout distance protection region is obtained: a minimum overload impedance setting angle phi1, a maximum overload impedance setting angle phi2 and an overload lockout value Zr are found out in the feeder line distance protection action region; and step C, lockout distance protection is performed: a current impedance value Z and a current impedance angle value phi are obtained, lockout distance protection pre-judgment is performed, if the current impedance value Z and the current impedance angle value phi fall in the feeder line distance protection action region, the method shifts to lockout distance protection determination, if the current impedance value Z and the current impedance angle value phi fall in the lockout distance protection region, lockout distance protection is performed, and at this moment, distance protection does not act.

Description

technical field [0001] The invention relates to the field of electrified railways, in particular to a novel feeder distance protection method suitable for high-speed railways. Background technique [0002] At present, the main protection of high-speed railway catenary faults basically adopts the traditional adaptive distance protection. However, the load of high-speed railways is very different from that of traditional ordinary-speed railways. In particular, high-speed railway locomotives adopt the AC-DC power supply mode, which basically does not contain low-order harmonics. When the load is large, the traditional adaptive distance protection cannot distinguish between overload and Faults, many high-speed railways have experienced overload tripping events due to load increases, which has a great impact on the reliability of relay protection. Contents of the invention [0003] The purpose of the present invention is to provide a novel feeder distance protection method sui...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 陈元寿李磊高华丽巩昊
Owner CHENGDU SOUTHWEST JIAOTONG UNIV XUJI ELECTRIC
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