Date of Post: 22 Dec, 2018
Lucknow Metro Rail Corporation has started the energisation work for the Receiving Sub Station (RSS) at the Mahila Polytechnic, Munshipulia. This sub-station will feed power supply to the traction and all the Metro stations of the balanced section from KD Singh Stadium to Munshipulia part of the 23 km long North-South Corridor (Phase 1A) This is another milestone which has been accomplished by the LMRC towards the commissioning of this corridor which is much ahead of its scheduled deadline with the most advanced equipment.
This RSS is designed to feed 25kV traction power and 33kV auxiliary power to the Metro corridor of Phase 1A of the Lucknow Metro Rail Project. It is a state-of-the-art 220kV/33kV/25kV Receiving Sub Station (RSS) cum Auxiliary main Sub Station cum Traction Sub Station.The RSS will receive power at 220 kV through double circuit underground cables laid from grid sub – station of UPPTCL at Chinhat. Approximately 7.5 kilometers of double circuit of 220 kV EHV cables have been laid by LMRC between Chinhat GSS to Mahila Polytechnic RSS of LMRC.
100% redundancy has been provided through the alternate circuit to improve the reliability. The distribution of the 220kV power to the transformers is through a modern technology of 220kV Gas Insulated Switchgear, which has resulted in substantial reduction in the requirement of the land for the 220 kV yard. Gas Insulated Switchgear has been installed for 25kV traction power distribution also.
33kV indoor type switchgear has also been provided for the auxiliary power supply distribution. Sub Station automation based on Intelligent Electronic Devices (IEDs) has been provided for Control and Protection of substation equipment. Supervisory Control and Data Acquisition System (SCADA) has been provided at the Operational Control Center (located at the Transport Nagar Metro Depot) through which all the power supplies equipment’s can be monitored and controlled.
These two Receiving Sub-stations are designed in such a way that they can cater to the traction and auxillary power requirement of whole North-South corridor of Lucknow Metro ie. From CCS Airport to Munshipulia, in case of failure of any of these Sub-Stations.