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Optimal Short Term Operation Planning of a Large Hydrothermal Power System Based on a Nonlinear Network Flow Concept

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4 Author(s)
H. Brannlund ; Energy Systems Laboratory Royal Institute of Technology S-100 44 Stockholm, Sweden ; J. A. Bubenko ; D. Sjelvgren ; N. Andersson

This paper presents a procedure for solving the short term generation scheduling problem for a large hydrothermal system that includes transmission limitations. The integrated system is divided into a hydro and a thermal subsystem. A reduced gradient algorithm is employed for the solution of the hydro subproblem. This algorithm is specialized to efficiently solve nonlinear network flow problems with additional constraints of non-netwrk type. The thermal subsystem is solved using a fast unit commitment and dispatch algorithm. A case study with the Swedish system is discussed.

Published in:

IEEE Transactions on Power Systems  (Volume:1 ,  Issue: 4 )