Metro Rail News Online

In recent years the importance of environmental problems has increased. Because of this electrical traction has replaced the internal combustion engine for mass transit systems. At first DC locomotives were used but they have many drawbacks, such as commutation, sparks on the brushes and difficulty in maintenance. However dc motors have now been replaced by 3-phase squirrel cage induction motors. To allow speed control the dc bus bar is available (+750Vdc) with a digital inverter built into the train. Pulse width modulation (PWM) is commonly used to convert a dc voltage to three symmetrical ac components. Moreover the GTO thyristors is changed to an Insulated Gate Bipolar Transistor (IGBT Technology) for its many advantages. Most metro systems in the world now use this approach. In this paper the mathematical modelling and simulation results are presented and commented on. Introduction The population of big cities needs major projects to solve their transportation problems.  The pr...

Hyderabad: The Hyderabad Metro Rail Limited (HMRL) is all set to open metro services on Ameerpet-MGBS section. The trial run of the metro rail on the MGBS route from Ameerpet was successful. On this route, the electrification work on metro track along with Over Head Electric Traction System (OETS) was inspected by the Chief Electrical Inspector DVS Raju appointed by the Central Government. During the inspection, he expressed satisfaction over the success of the work. [caption id="attachment_14377" align="alignnone" width="600"] Chief Electrical Inspector carried inspection of Overhead Electric Traction System in Ameerpet-MGBS section of Hyderabad Metro Rail Project[/caption] According to Hyderabad metro rail official, Electricity will be supplied from the 132 KV / 25 receiver station, built near MGBS, Miyapur for this traction system. An incoming power supply will be supplied from TS Transco"s 220 KV / 132 KV Main Sub station of Receiving Sub-Statio...

Mumbai: The Larsen & Toubro Ltd (L&T) awarded contract for electrical system works pertaining to power supply for the Colaba-Bandra-Seepz Metro 3 project of Mumbai Metro Rail Corporation Limited (MMRC). MMRC signed a System Contract Agreement (SCA) with L&T Ltd. on Friday. The contract was signed by A. A. Bhatt, Director (Systems) of Mumbai Metro Rail Corporation and Puneet Arora on behalf of Larsen & Toubro Ltd. This contract package covers work of design, installation, testing and commissioning of power supply works including receiving sub-stations, 110kV cabling works, traction sub-stations, switching stations, auxiliary main sub-stations, SCADA system and integration with other systems. “Power supply works is a critical component of Metro 3 implementation. We aim to implement robust and technologically advanced power supply system for Metro-3 and complete the works in time so that the 3 project can be completed within stipulated timelines”, said...

Mumbai: The Larsen & Toubro Ltd (L&T) awarded contract for electrical system works pertaining to power supply for the Colaba-Bandra-Seepz Metro 3 project of Mumbai Metro Rail Corporation Limited (MMRC). MMRC signed a System Contract Agreement (SCA) with L&T Ltd. on Friday. The contract was signed by A. A. Bhatt, Director (Systems) of Mumbai Metro Rail Corporation and Puneet Arora on behalf of Larsen & Toubro Ltd. This contract package covers work of design, installation, testing and commissioning of power supply works including receiving sub-stations, 110kV cabling works, traction sub-stations, switching stations, auxiliary main sub-stations, SCADA system and integration with other systems. “Power supply works is a critical component of Metro 3 implementation. We aim to implement robust and technologically advanced power supply system for Metro-3 and complete the works in time so that the 3 project can be completed within stipulated timelines”, said...