On Mar. 8, 2015, the bulk supply substation (BSS) power supply integration test in TIAA MRT E&M System Construction Project (ME01 tender) was implemented subsequently with fire simulation tests in underground stations including National Taiwan Sports University Station (A7), Airport Terminal 2 Station (A13) and Huanbei Station (A21).
The first step of the integration test is to cut off all power supply from Taipower at each BSS. By cutting off the power, the GIS in each BSS, the 252-G1 & 252-G2 in each traction power substation and the 252-TA & TB in each station will all be turned on. Then, the OCC will send out the generator initiation signal to each station awaiting offload completion of low voltage power in each station. After offloading confirmation signals are sent out, the backup generators at the BSSs will be activated and the 22kV power supply system will be initiated. Subsequently, the 252-TA & TB switches will be turned off allowing electricity to flow through vital systems and thus completing the generator power supply system.
After stability of the power supply system is established, the fire simulation tests at A7, A13 and A21 underground stations were implemented. The tests were implemented under operational modes No. 61-3 (fire in cabins at southbound platform) and 62-3 (fire in cabins at northbound platform) at maximum loading condition.
Upon completion of the fire simulation tests and A7, A13 and A21 stations, the integration testing process is finished and the power supply system will be changed back to Taipower supply with reversed process as the transformation described above. One of the focuses in this test included whether signals were successfully sent back to the OCC. If the signals failed to reach OCC or if the signal was incomplete, electricity will not be able to be delivered by the generator as expected. Therefore, the integration test not only requires full support from SCADA and the power supply system but also requires the E&M equipment to send status signals via BMS to the OCC.
According to test results, the capacity of BSS backup generators is proved to be sufficient for vital systems in each station under fire simulation loadings. In addition, due to incomplete construction status of A1 Station, the integration test at A1 Station will be rescheduled.