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| Re: Photos - Dallas DART - Part 1 (973291) | |||
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Re: Photos - Dallas DART - Part 1 |
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Posted by Chris R16/R2730 on Tue Aug 31 12:13:43 2010, in response to Re: Photos - Dallas DART - Part 1, posted by Olog-hai on Mon Aug 30 15:19:46 2010. DART is unique in having one of the few variable voltage power distribution system in North America. Each substation is polled for energy usage and voltages are varied according to energy used and energy needed. An energy management system logs and predicts the amount of energy needed by the system based on usage history and predicted schedule. The energy management system's main purpose is to reduce energy costs while providing proper energy to the light rail vehicle. Not all substations have to be operational for the light rail system to work. In the event of loss of utility power to a substation, the system is designed to provide enough power to compensate.Very interesting. A section of catenary is only energized when a train is in it. |
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