Shri Kumar Keshav, Managing Director, Lucknow Metro Rail Corporation (LMRC) today performed the ‘bhoomi –pujan’ ceremony to start the civil construction work for the Receiving Sub Station (RSS) at the Mahila Polytechnic, Munshipulia. This sub-station that will feed power to the entire 23 km long North – South Corridor (Phase 1A) from the Chaudhary Charan Singh Airport to the Airport Metro Station Munshipulia.
“This RSS is designed to feed 25kV traction power and 33kV auxiliary power to the entire Metro corridor of Phase 1A of the Lucknow Metro Rail Project. It will be a state-of-the-art 220kV/33kV/25kV Receiving Sub Station (RSS) cum Auxiliary main Sub Station cum Traction Sub Station,” the Managing Director said after performing the ‘puja’.
There shall be two 30 MVA traction transformers to feed 25kV power supply for the train operation and two 30 MVA auxiliary transformers to feed auxiliary system at 33kV level. Each transformer is adequate to take care of the full load of entire section from Munshipulia to CCS Airport.
Image Credit: LMRC
The RSS will receive power at 220 kV through double circuit underground cables to be laid from grid sub – station of UPPTCL at Chinhat. Approximately 8 kilometers of double circuit of 220 kV EHV cables are being laid by LMRC between Chinhat GSS to Mahila Polytechnic RSS of LMRC.
One circuit is adequate enough to meet entire load. 100% redundancy has been provided through the second 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 will be installed for 25kV traction power distribution also.
33kV indoor type switchgear will also be provided for the auxiliary power supply distribution. Sub Station automation based on Intelligent Electronic Devices (IEDs) shall be provided for Control and Protection of substation equipment. Supervisory Control and Data Acquisition System (SCADA) will be 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.
LMRC will install solar power panels to meet the lighting load of this Receiving Sub Station (RSS) at Mahila Polytechnic, Munshipulia.