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Electric Reliability Council of Texas, grid operator for most of the state, recently completed a live run of its pending nodal real-time market. ERCOT says its system operations managed the power grid with the nodal real-time systems that will be in place when the nodal market is launched, anticipated in 2009.

"This was a key milestone because it demonstrated ERCOT's ability to run a real-time nodal market," says Ron Hinsley, chief information officer and nodal executive sponsor for ERCOT. "The test not only validated the ERCOT systems, but it also confirmed that market participants have the systems in place for nodal real-time operation and that our systems can work in a coordinated effort. This involved a huge amount of coordination between ERCOT and the 55 energy schedulers in the test, and everyone performed brilliantly."

According to ERCOT, it moved the energy schedulers to nodal operation one at a time in order to maintain frequency and power flows at the desired output, and the market was entirely under nodal system control for 29 minutes.

The primary components of the nodal market include a day-ahead market, reliability unit commitment, real-time or security constrained economic dispatch, and congestion revenue rights. ERCOT expects the nodal market to deliver improved price signals, improved dispatch efficiencies and direct assignment of local congestion.

SOURCE: Electric Reliability Council of Texas

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