台北捷運初期路網雜散電流之監測分析與抑制對策

Monitoring Analysis and Control Measures of Stray Currents of Taipei Mass Rapid Transit System Initial Network

陳榮良(Chen-Rong Liang)

指導教授 ： 何金滿

中原大學/工學院/電機工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100329

摘要

有關大眾捷運系統的牽引電力所引起的雜散電流，引發沿線的金屬管線有腐蝕的疑慮，且隨著路網的擴充而更形複雜。會造成電蝕的環境條件，是由於該區域的金屬結構物與大地間存在了電位差。

在進行量測雜散電流相關作業時，電壓的量測必須考慮使用具高電阻且可量測微伏和便於攜帶的電壓表，而電流的量測則藉由被測物間的電位差而經計算得知。本文將針對雜散電流的理論、雜散電流的監測分析、及雜散電流的防制，進行實務探討與改進。

文中我們介紹了幾種實際量測雜散電流的方法，並探討一些，用於防制軌道雜散電流和減少地下結構物的措施。然而防患軌道系統雜散電流最有效的方式，還是在於做好對地的電氣絕緣。

本文將以台北捷運系統路線的相關監測結果，進行路網沿線雜散電流分佈狀況的分析，以作為防患及改善措施之考量，並介紹現行所採的抑制對策及其成效，希望對後續的進一步相關研究能有所助益。

關鍵字

主變電站 ； 牽引動力變電站 ； 機廠 ； 台北都會區捷運系統 ； 車站配電室

並列摘要

Abstract

Electric powered mass rapid transit system creates stray currents which can cause severe corrosion damage and are often existing in ductile and cast iron water piping. In determination the corrosion of corrosion conditions, voltages between the structures and the earth must be measured so that qualitative indications can be given to show areas where the current is entering and where it is being discharged.

The voltages are best measured using a high resistance dc-milli- volt voltmeter and a well damped movement. Current measurements, are made by obtaining potential differences over a length of a structure. Voltage and current readings should be correlated because the potentials and currents fluctuate considerably.

Several measures can be applied to control stray currents from a d-c railway system and reduce corrosion on underground structures. Prevention of stray current on an electrified-train system requires that all elements of the traction power circuit be electrically insulated from the earthed structures.

This paper presents the practical experience of monitoring analysis and control measures of stray currents of Taipei mass rapid transit system. We expect this analysis will be useful for the future studies in the field of d-c railway system.

並列關鍵字

Depot ； TSS(Traction Supply Substation) ； SSS(Station Supply Substation) ； BSS( Bulk Supply Substation) ； MRTS(Mass Rapid Transit System)

參考文獻

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