捷運月台門搭接至軌道時之轉移電壓特性及其影響研究

Transfer Voltages Characteristics and Affections When Platform-Screen Doors are Bonded to Rails of MRT System

黃文發(Win-Far Huang)

指導教授 ： 周至如

國立臺北科技大學/電資學院/電機工程系研究所/碩士(2010年)

https://doi.org/10.6841/NTUT.2010.00125

摘要

由於大眾捷運系統日益發達，運輸系統站體之設計亦趨於完善；其中月台門之設計方式，無論於空間規劃、建築設計、視覺傳達、人員安全及防止人員落軌等議題方面，成為各界關注之焦點。近年來捷運工程設計時已納入月台門系統，當眾多目光持續聚焦於人員落軌安全或月台門視覺美觀設計上時，月台門系統對乘客或工作人員所造成之感電危害，實不可忽視。尤其當月台門搭接至軌道時軌道電位將轉移至月台門形成各種類型的轉移電壓，包括地電昇、接觸電壓及金屬間接觸電壓，這些電壓對車站內人員及各種設備的安全影響極大，亟須加以探討。為此本論文將針對捷運月台門搭接至軌道時之轉移電壓特性加以分析，並評估對人員安全之影響，其中分析軌道供電系統正常運轉及發生故障時之月台門轉移電壓，包括地電位昇、接觸電壓及金屬間接觸電壓。文中首先應用電磁暫態分析程式建構捷運供電系統之模型，模型中考量不同軌道接地方式及AC22.8kV/直流750V之供電系統。然後籍此ATP模型分析供電系統正常運轉及接地故障時，轉移電壓的暫態及穩態特性，並實際赴現有捷運系統之現場量測人員之接觸電壓、金屬接觸電壓及相關數據。最後依據模擬結果及量測數據評估對人員安全及設備之影響。本研究結果可供相關單位於設計(或探討)捷運月台門系統防護措施之參考。

關鍵字

月台門 ； 地電位分佈 ； 接觸電壓 ； 轉移電壓 ； 接地系統

並列摘要

The development of mass rapid transit system (MRTS) are more and more mature, and the designs of related apparatuses on the platform have been a mature technology also, such as platform-screen doors (PSDs). For that, the design methodologies for PSDs have been presented, including space layout, architectural design, sight sense and safety of passengers. The project of PSDs system has been integrated into the overall MRTS engineering during recent years, and the design considerations are focused on personal safety to avoid ones falling into rail or the artistic design of PSDs appearance, and the question about the electrical shock dangers of PSDs system to passengers. Especially, when the PSDs are bonded to the rails, the rail potentials will be transferred to PSDs to form various types of transfer voltages including ground potential rises (GPRs), touch voltage and metal-to-metal touch voltages. These voltages are very critical to personnel safety, such that they should be further studied.
This thesis will analyze the characteristics of transfer voltage of PSDs bonding to rail with respect to normal operation and earth fault on power supply system, including GPRs, touch voltage and metal-to-metal touch voltages, and to evaluate the effect on safety of personal furthermore.
At first, the simulation software, namely electromagnetic transient program - alternative transient program (EMTP-ATP), is used to construct a typical power supply model (ATP model) of MRTS, in which various grounded manners of rails and the AC 22.8kV / DC 750V power supply system are considered. Then, based on ATP model, the characteristics of transient and steady state of transfer voltages on PSDs, during ground fault and normal operation are analyzed. Furthermore, the touch voltage and metal-to-metal touch voltages between PSD and the metallic objects or structures in the platform of existent MRTS are measured. Finally, according to the measured data and the simulation results, the affections of transfer voltages on personnel safety and equipment of PSD are assessed. The study results can provide the references of protection measures of PSDs system of MRTS for associated departments.

並列關鍵字

Platform-Screen Door (PSD) ； Ground Potential Distribution ； Touch Voltage ； Transfer Voltage and Grounding System

參考文獻

[21] 鍾政男，「特高壓供電科技廠接地故障分析及其風險評估」，國立臺北科技大學學碩士論文，97年6月。

[1] ATP Draw version 3.5 for Windows 9x/NT2000/XP.

[2] ANSI/IEEE Std. 80-2000, “IEEE Guide for Safety in AC Substation Grounding,”IEEE Society, New York, 2000.

[5] 陳孟堯，「高運量捷運系統軌道電位及雜散電流分析」，碩士論文，國立台北科技大學電機工程系，97 年6 月。

[15] 捷運月台門設置對於人員感電危害之潛在風險研究，台灣世曦工程顧問股份有限公司，98年度研發計畫報告。