Newsletter 高速鐵路簡訊 . 交通部高速鐵路工程局
燃料電池於捷運供電系統之應用 Application of Fuel Cells in MRT Power Supply System
固態氧化物SOFC電力測試。

燃料電池(Fuel Cell, FC)是名符其實的能量轉換機器,而並非能量儲存容器。它接近於汽油或柴油發電機,而非僅是電池。以固態氧化物燃料電池(SOFC)發電量最高,約500KW至50MW,此種燃料電池最能運用在捷運供電系統上。
燃料電池受限於電力容量發展,目前能應用在捷運供電系統上的為不斷電系統及備援電力系統,分述如下:
1.不斷電系統(UPS):於捷運可運用於號誌系統、電力遙控(PRC)系統及低壓水環系統。此三種不斷電系統是由電池室組成,適用氫型燃料電池及質子交換膜燃料電池(PEMFC)、鹼性燃料電池(PAFC)。以氫型FC效能最好,成本最低。
2.備援電力系統(Fuel Cell Back-up Power System):燃料電池啟動只需1~2秒,適用此系統的燃料電池為PEMFC、熔融碳酸鹽燃料電池(MCFC)、SOFC三種較常用。若以成本考量,以SOFC較適合。
燃料電池於捷運供電系統之運用上可開發為::
1.外部電力系統供應車輛驅動:目前國際上支持且計劃利用再生能源結合燃料電池作為離網或併網之發電系統。若SOFC電力開發至800MW以上,成本將大大降低。
2.車輛自身產生電力結合直流馬達自行運行:各國已將燃料電池運用到汽車當引擎使用,但對捷運電聯車用電量1.35MW~1.71MW尚有一大段距離要努力。

Fuel cells are energy transformers like gasoline/diesel fuel generators rather than energy storage vessels such as batteries, among which SOFC has the highest generating capacity. SOFC's generating capacity is about 500KW to 50MW and is most suitable for applying on MRT's power supply system.
Due to confinement of electricity capacity on fuel cells, it is only applied on the UPS System and Back-up Power System of MRT power supply, details are as follow:
1.UPS System: fuel cells are used on signal system, PRC system and low pressure water works system in the overall MRT system. The three UPS systems are made up of cell rooms. Applicable models include hydrogen-FC, PEMFC and PAFC among which hydrogen-FC possess the best efficiency and lowest cost.
2.Fuel Cell Back-up Power System: it only takes 1-2 seconds for fuel cells to be activated. Applicable models for this system include PEMFC, MCFC and SOFC. When cost is the main consideration, SOFC is the best option.
Future developments of fuel cell application on MRT power supply system are as follow:
1.Train propulsion by external power system: Using renewable energy source combined with fuel cells as isolated/ grid-connected electricity generating system is greatly supported and developed internationally. If the generating capacity of SOFC could be developed to over 800MW, the cost would greatly decrease.
2.Auto-motivation of trains from self-generated electric power with the help of DC motors: Many countries have already developed fuel cells as car engines, but compared to the 1.35MW~1.71MW power consumption of MRT EMUs, there is still a long way to go.

  • 分享: