Title :
Short-Term Operation Planning of Integrated Hydrothermal and Natural Gas Systems
Author :
Unsihuay, Clodomiro ; Marangon-Lima, J.W. ; De Souza, A. C Zambroni
Author_Institution :
Electr. Eng., Fed. Univ. of Itajuba, Itajuba
Abstract :
This paper integrates the natural gas and hydrothermal systems in terms of power and gas optimal short- term operations planning and unit commitment. In this paper, the natural gas network model including storages and pipelines are integrated with hydrothermal systems to optimize short-term operation of both systems simultaneously. The proposed model considers the constraints at the hydrothermal system, natural gas extraction, natural gas storage operation and pipeline. The proposed model results in a large-scale mixed-integer nonlinear programming problem where the objective function is to minimize the integrated gas-electricity system operation costs. To solve the integrated electricity-gas optimal short-term planning problem an approach based on Dual Decomposition, Lagrangian Relaxation and Dynamic Programming is employed. A didactic integrated hydrothermal and gas system case study is presented. The proposed model shows the importance of the integration of the two systems in terms of operation, planning, security and reliability.
Keywords :
hydroelectric power stations; integer programming; natural gas technology; nonlinear programming; pipelines; power generation planning; power generation reliability; power system security; thermal power stations; Lagrangian relaxation; dual decomposition; dynamic programming; gas optimal short- term operations planning; integrated electricity-gas optimal short-term planning problem; integrated gas-electricity system operation costs; integrated hydrothermal; large-scale mixed-integer nonlinear programming problem; natural gas storage operation; natural gas systems; power optimal short- term operations planning; short-term operation planning; unit commitment; Cost function; Dynamic programming; Functional programming; Lagrangian functions; Large scale integration; Natural gas; Pipelines; Power system modeling; Power system planning; Security; Lagrangian relaxation; Natural gas systems; dynamic programming; mixed-integer nonlinear programming; pipelines network; primal and dual decomposition; scheduling of hydrothermal system; unit commitment;
Conference_Titel :
Power Tech, 2007 IEEE Lausanne
Conference_Location :
Lausanne
Print_ISBN :
978-1-4244-2189-3
Electronic_ISBN :
978-1-4244-2190-9
DOI :
10.1109/PCT.2007.4538522