Minimizing fuel and environmental costs for a variable-load power plant (co-)firing fuel oil and natural gas Part 2. Optimization of load dispatch

Abstract A linear programming-based approach was applied to optimize the power (or load) distribution among 200-MW and 310-MW units of a 1330-MW power plant (co-)firing fuel oil and natural gas. The objective function for the optimization was the total costs, including “internal” (or fuel) and “external” (or environmental) costs, for the power plant meeting the current load demand. Both fuel and environmental costs (the latter being associated with NO x , SO 3 , SO 2 and CO 2 emissions) of the units were predicted for different fuel options. The total costs for an individual boiler unit were shown to be quasi-linear with the unit load. Optimal load dispatch over the units was determined using a typical daily load curve of the power plant, for distinct climatic seasons in Thailand. The time-domain savings of the total costs resulted from switching the units from actual to the optimized loads were quantified for this power plant.

[1]  J. W. Lamont,et al.  Emission dispatch models and algorithms for the 1990s , 1995 .

[2]  Ferial El-Hawary,et al.  A summary of environmental/economic dispatch algorithms , 1994 .

[3]  M. Muslu.  Economic dispatch with environmental considerations: tradeoff curves and emission reduction rates , 2004 .

[4]  W. Bignell,et al.  Effects of machine inertia constants on system transient stability , 1999 .

[5]  Yinlun Huang,et al.  Fuzzy model-based optimal dispatching for NOx reduction in power plants , 1998 .

[6]  Michael J. G. Poloyni.  Power and process control systems , 1991 .

[7]  S. C. Choube,et al.  Emission constrained secure economic dispatch , 1997 .

[8]  V. I. Kuprianov,et al.  Minimizing fuel and environmental costs for a variable-load power plant (co-)firing fuel oil and natural gas. Part 1. Modeling of gaseous emissions from boiler units , 2006 .

[9]  Vladimir I. Kuprianov.  Applications of a cost-based method of excess air optimization for the improvement of thermal efficiency and environmental performance of steam boilers , 2005 .

[10]  W. Ongsakul,et al.  Real-time economic dispatch using merit order loading for linear decreasing and staircase incremental cost functions , 1999 .

[11]  P. L. Douglas,et al.  EFFECT OF FUEL GRADE ON THE OPTIMIZED UNIT LOADING IN RESPONSE TO VARIABLE ELECTRICITY DEMAND OF A FUEL OIL-FIRED POWER PLANT , 2003 .

[12]  Vladimir I. Kuprianov,et al.  Experimental study on effects of operating conditions and fuel quality on thermal efficiency and emission performance of a 300-MW boiler unit firing Thai lignite , 2007 .