Economic Dispatch with Unit Deactivation: Model and Solution

The conventional economic dispatch (ED) model does not consider the case that some units are allowed to be deactivated. In this paper, the significance of this case is discussed first. Then a new ED model is proposed to incorporate unit deactivation. In this model, the integer variables are controlled by continuous variables. An algorithm is developed to solve the new model, taking into account the transmission loss. This algorithm is implemented in a computer program. Two systems are tested. It is shown that the objective function can be further optimized, up to 12.9% compared to the conventional ED model.

[1]  Xian Liu,et al.  An Improved Interpolation Method for Wind Power Curves , 2012, IEEE Transactions on Sustainable Energy.

[2]  A. Llombart,et al.  Statistical Analysis of Wind Power Forecast Error , 2008, IEEE Transactions on Power Systems.

[3]  J. A. Carta,et al.  A review of wind speed probability distributions used in wind energy analysis: Case studies in the Canary Islands , 2009 .

[4]  K.M. Nor,et al.  Optimal Sizing for a Gas-Fired Grid-Connected Cogeneration System Planning , 2009, IEEE Transactions on Energy Conversion.

[5]  X. Liu.  Application of filled function method to multimodal economic load dispatch problems , 2011 .

[6]  Zwe-Lee Gaing,et al.  Particle swarm optimization to solving the economic dispatch considering the generator constraints , 2003 .

[7]  Xian Liu.  On economic dispatch with units being shut down , 2012, 2012 IEEE Power and Energy Society General Meeting.

[8]  P. K. Chattopadhyay,et al.  Evolutionary programming techniques for economic load dispatch , 2003, IEEE Trans. Evol. Comput..

[9]  Vishnu Prasad,et al.  Economic dispatch using particle swarm optimization: A review , 2009 .

[10]  L. H. Fink,et al.  Understanding automatic generation control , 1992 .

[11]  Gilbert M. Masters,et al.  Renewable and Efficient Electric Power Systems , 2004 .

[12]  Wilsun Xu,et al.  Minimum Emission Dispatch Constrained by Stochastic Wind Power Availability and Cost , 2010, IEEE Transactions on Power Systems.

[13]  A. Fabbri,et al.  Assessment of the cost associated with wind generation prediction errors in a liberalized electricity market , 2005, IEEE Transactions on Power Systems.

[14]  Hadi Saadat,et al.  Power System Analysis , 1998 .

[15]  J. Lobry,et al.  Impact of the Wind Geographical Correlation Level for Reliability Studies , 2007, IEEE Transactions on Power Systems.