Ramp rate modeling for ERCOT look ahead SCED

Author

Xu, Xin ; Howard, Richard

Author_Institution

ERCOT, Taylor, TX, USA

fYear

2013

fDate

21-25 July 2013

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting (PES), 2013 IEEE

Conference_Location

Vancouver, BC

ISSN

1944-9925

Type

conf

DOI

10.1109/PESMG.2013.6672741

Filename

6672741