Newsletter 高速鐵路簡訊 . 交通部高速鐵路工程局
捷運系統直流分析介紹 Introduction to the DC Analysis of MRT System
「New Jumps」系統配置。

直流分析為捷運供電系統之基本設計,主要目的在確認系統上牽引動力變電站數量、規格及位置,模擬並計算捷運系統於正常及非正常供電狀態下之直流系統負載變化、各牽引動力變電站出力及列車於捷運路網中之平均及瞬間電力消耗等。另其結果尚作為捷運交流分析及諧波分析之基本輸入資料,故直流分析可謂是捷運供電系統設計之火車頭。
桃園機場捷運系統直流模擬分析,係採用日立製作所鐵道模擬程式「New Jumps」來進行,所需資訊,包含列車資料(車輛編組、車重、馬達轉動慣量、加∕減速、輔助電力消耗、電聯車控制方式等)、號誌資料(ATO運轉模式、閉塞數及距離等)、軌道資料(坡度、彎度及速限等)、供電系統資料(牽引動力變電站特性、位置、第三軌電阻值、軌道特性及電阻值等)與營運資料(長陡坡路線曲線、營運班距、運量、直達車追越、行車曲線、車站停靠時間及電聯車營運時刻表等),藉以綜合模擬於營運條件及不同供電狀態下,路網上每一牽引動力變電站電壓、電流及負載變化趨勢、第三軌及軌道電壓變化、流至第三軌之饋電流與系統負回流電流大小,以驗證路網上牽引動力變電站配置及規格選定是否適宜。直流分析為捷運供電系統設計之重要規劃項目,分析結果對於系統建置將有莫大助益。

DC analysis i s one of the basic designs in MRT power supply system and its main purpose is to confirm the amount, specification and location of traction power substations in the system. The analysis can then lead to simulation and calculation of DC loading fluctuation, power distribution of each substation and instant/average power consumption values of EMU in the MRT network under normal and abnormal power supply conditions. Furthermore, DC analysis results can provide basic input data for AC analysis and harmonic analysis, consequently, DC analysis is regarded as the pioneer of MRT power supply design.
The DC simulation analysis of TIAA MRT Project adopted the railway simulation program, "New Jump", from Hitachi Ltd. All required information are taken into consideration in the simulation including train data (train formation, train weight, moment of inertia of motors, acceleration/deceleration rate, auxiliary power consumption, control method of EMUs, etc), signaling data (ATO operational mode, block numbers and distance, etc), rail data (gradient, curve, speed limit, etc), power supply data (features and location of traction power substations, , impedance value of the third rail, rail characteristics and impedance values, etc) and operational data (long steep gradient route, headway,ridership, express train overtaking, operational curves, dwelling time at stations, operation timetables, etc). Then, under various operational condition and power supply conditions, simulates voltage, current and loading fluctuation of each traction power substation, voltage change in the third rail and running rails and feeding current on the third rail and return current. Such measurements can determine whether the traction power substation distribution and specification are suitable. The DC analysis is a significant design part in MRT's power supply system in which the analysis results can benefit to system build.

  • 直流供電系統示意圖。
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