By Topic

Optimal long-term unit commitment in large scale systems including fuel constrained thermal and pumped-storage hydro

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
K. Aoki ; Fac. of Eng., Hiroshima Univ., Japan ; M. Itoh ; T. Satoh ; K. Nara
more authors

A method is discussed for solving a long-term unit commitment problem in a large-scale power system consisting of three types of units (1) thermal, (2) fuel-constrained thermal, and (3) pumped-storage hydro. In such a system, a long-term schedule ranging from one week to one month must be determined, because the LNG/LPG fuel is assigned to the fuel-constrained unit at weekly or monthly intervals owing to contractual restrictions and also because the operating cycle of the pumped-storage unit is one week for economical reasons. The subgradient method using the Lagrangian relaxation for a daily unit commitment is not suitable to the long-term problem, since the convergence to the dual maximum is not so good. To overcome this defect, the authors develop an algorithm for dual maximization based on the variable metric method. A numerical example is given that validates the algorithm

Published in:

IEEE Transactions on Power Systems  (Volume:4 ,  Issue: 3 )