Taipei City Government

It is a requirement that at least two main substations be provided for the power supply of each MRT line. Furthermore, each main substation is connected to dual power circuits from Taiwan Power Company substations in order to supply electricity to MRT stations and trains. In addition, the MRT power supply system has a comprehensive backup mechanism. In the event that any single device fails, power can be promptly transferred from another unit of equipment or an adjacent station through switch panels and cables to ensure that the power supply to stations and trains continues uninterrupted. Moreover, operating unit (i.e., Taipei Metro) regularly conducts preventative maintenance tasks so that when faults are detected in the power supply equipment they can be promptly handled. In the future, real-time power supply equipment detection systems (partial discharge monitoring systems) will be introduced into the Circular line and the Wanda line and will have the capability of issuing preventative alerts for equipment and ensuring an uninterrupted power supply.