Title :
Impact of Natural Gas System on Risk-Constrained Midterm Hydrothermal Scheduling
Author :
Sahin, Cem ; Li, Zuyi ; Shahidehpour, Mohammad ; Erkmen, Ismet
Author_Institution :
Dept. of Electr. & Electron. Eng., Middle East Tech. Univ., Ankara, Turkey
fDate :
5/1/2011 12:00:00 AM
Abstract :
This paper studies the impact of natural gas (NG) contracts and constraints on a GENCO´s midterm risk-constrained hydrothermal scheduling problem. The NG contracts and constraints are modeled as a set of linear equations. The proposed model utilizes the stochastic price-based unit commitment (PBUC). The PBUC hourly solution considers uncertainties of market prices for energy and ancillary services, uncertainties of natural water inflows, and random NG infrastructure interruptions in Monte Carlo scenarios. Illustrative examples analyze the GENCO´s risk levels when considering midterm schedules for generating units, target payoffs, and usages of water inflow, NG and other thermal resources. Simulation results show that a GENCO´s midterm schedules and financial risks could be impacted significantly with the consideration of NG contracts and constraints.
Keywords :
Monte Carlo methods; contracts; hydrothermal power systems; natural gas technology; power generation dispatch; power generation scheduling; power markets; risk analysis; stochastic processes; GENCO midterm risk-constrained hydrothermal scheduling problem; Monte Carlo scenarios; NG contracts; PBUC hourly solution; ancillary services; energy services; linear equations; market prices; natural gas system; stochastic price-based unit commitment; thermal resources; Contracts; Costs; Fuels; Natural gas; Pipelines; Power generation; Spinning; Stochastic processes; Uncertainty; Water resources; Financial and physical risks; generation companies; interdependency of natural gas and electricity; natural gas contracts; stochastic price-based unit commitment;
Journal_Title :
Power Systems, IEEE Transactions on
DOI :
10.1109/TPWRS.2010.2052838