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Protection Scheme and Setting Caculation of Traction Power Supply Systems for Passenger Dedicated Line

Author: ZhouXiaoDong
Tutor: ChenXiaoChuan；ChenXueGuang
School: Southwest Jiaotong University
Course: Electrical Engineering
Keywords: Passenger Line All Parallel AT Power Supply Protection configuration Setting Calculation
CLC: U223.6
Type: Master's thesis
Year: 2009
Downloads: 81
Quote: 2
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Abstract


Tuning calculated based on the actual construction of the Wuhan-Guangzhou Passenger Line ( Wuhan - Guangzhou) , the focus of its traction power supply system relay protection program analysis , in order to protect one substation example . The railway line for passenger EMU , the load current conventional locomotive very different , combined with the most traction network AT power supply fully parallel protection configuration with the conventional way of protection of the power supply system is also very different , you must seek a new protection scheme to meet the reliability and safety of passenger dedicated line relay protection . Main transformer protection using traditional protection solutions , that is the main protection configuration of the differential protection , the second harmonic blocking ratio differential protection and gas protection ; configuration backup protection for high and low pressure side of the low- voltage startup overcurrent protection , overload protection line voltage protection and temperature protection . This paper analyzes the features of parallel AT Traction Power Supply normal and short-circuit . Combination of short-circuit analysis , the following reasonable protection program : traction the network feeder protection configuration section of impedance protection , low voltage startup current, once reclosing ; AT configured incoming line voltage protection , seized pressure reclosing ; AT transformer configuration difference dynamic protection, overcurrent protection , gas protection and temperature protection . Traction network AT the partition on the downlink parallel and network protection settings for the traction network failure , Feeder Protection immediate action breaker breaking traction in this article , then AT partition the circuit breaker has breaking the parallel the network becomes not parallel , and impedance protection with high sensitivity , so you only need to set the period of impedance protection and to protect the full length of the traction network . To survive the AT the partition breaker reclosing AT produced by magnetizing inrush current to prevent the malfunction of the feeder protection , the AT the partition seized pressure RECLOSURE time stagger , set the second time differential .

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CLC: > Transportation > Rail transport > Electrified railway > Power supply > Power supply system
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