from wikipedia
The power for the system will be 750 V DC bottom contact third rail supply. In December 2009, the ABB Group was awarded the contract to provide power solutions for the first phase of the planned metro network. ABB will design, supply, install and commission four substations that receive and distribute electricity, each rated at 66/33 kV, as well as the auxiliary and traction substations. ABB will also provide an integrated network management, or SCADA (Supervisory Control And Data Acquisition), system to monitor and control the installations.