4 sub-stations put Hyderabad Metro on track for uninterrupted run ahead of PM’s inauguration

HYDERABAD: To ensure uninterrupted power supply both for railway traction and auxiliary services of the Hyderabad Metro Rail Project, the Telangana State Southern Power Distribution Company Limited (TSSPDCL) has set up four dedicated sub-stations for all the three corridors of the project covering 72km.

The four receiving sub stations (RSS) are located at Uppal, Miyapur, Yousufguda and Mahatma Gandhi Bus Station (MGBS).

Power consumption has two major components. One is train services (traction purpose) and the other being auxiliary services (at stations, depots, and other commercial purposes like malls, restaurants and offices) being provided by project developer L&T Metro Rail Hyderabad.

“For the 30-km stretch from Nagole to Miyapur, that is likely to be inaugurated by Prime Minister Narendra Modi on November 28, the power requirement is 60 megawatt (MW) a day,” Hyderabad Metro Rail Limited (HMRL) managing director NVS Reddy told on Tuesday. Officials said the project is equipped with a 25-kilovolt AC electrical system and is fed by a 133-KV incoming power line from the Telangana Grid that caters to all the four RSS. Trains will be run on a 25-KV AC single phase Supply. Each metro rail station is equip ped with an auxiliary substation built as per international standards with state-of-the-art technology and quality electrical equipment, they said.

In case there is a power failure from the main line, alternative arrangements will be provided from other receiving sub stations, TSSPDCL officials said.

“The power supply will be monitored by Discom officials through the remote control from Supervisory Control and Data Acquisition (SCADA) system at Ope rations Control Center (OCC) located at Uppal de pot,” TSSDPCL director (operations) G Srinivas Reddy told.

HMR officials estimate that each metro train will consume 450 kilowatt hours (units) per trip in Corridor-I (Miyapur-L B Nagar) and Corridor-III (Nagole-Shilparamam), whereas it will consume about 300 Kwhrs (units) per trip for Corridor II (JBS-Falaknuma), as it is shorter. The total maximum power demand requirement will work out to 125 megawatts (MW) after the entire 72km becomes operational.

TSSDPCL will charge Rs.3.95 per unit from L&T metro rail for supplying power.

Last year, it was decided to collect Rs. 7 per unit by creating a separate category in its annual revenue requirement submitted to the Telangana State Electricity Regulatory Commission.But after the tariff was opposed by the project developer and taking the metro power charges in other cities into consideration, it was revised to Rs.3.95 per unit, officials said.