Title :
Ramp rate modeling for ERCOT look ahead SCED
Author :
Xu, Xin ; Howard, Richard
Author_Institution :
ERCOT, Taylor, TX, USA
Abstract :
Required by NPRR 351, starting June 28, 2012, ERCOT begins to post indicative real time market prices for future intervals. The indicative real time LMP´s are calculated by a separated market application, which optimizes over the next hour based on forecasted load demand and wind generation. To explicitly model ramp rate constraints, the optimization model becomes a Mixed Integer Quadratic Programming (MIQP) problem, which imposes a major performance challenge. This paper discusses the measures have been taken during implementation to meet the real time performance requirement.
Keywords :
integer programming; load forecasting; power markets; pricing; quadratic programming; ERCOT look ahead SCED; MIQP problem; NPRR 351; explicitly model ramp rate constraints; indicative real time market prices; load demand forecating; mixed integer quadratic programming problem; optimization model; wind generation; Equations; Load modeling; Mathematical model; Numerical models; Optimization; Pricing; Real-time systems; Electricity Markets; Look-Ahead Dispatch; Ramp Rate Modeling; Real-Time Forward Pricing;
Conference_Titel :
Power and Energy Society General Meeting (PES), 2013 IEEE
Conference_Location :
Vancouver, BC
DOI :
10.1109/PESMG.2013.6672741
