A very fast and effective noniterative “λ-logic based” algorithm for economic dispatch of thermal units

In this paper a very fast and effective noniterative “λ-logic based” algorithm for economic dispatch of thermal units has been presented. As this is a direct or noniterative method it does not demand any initial guess value of λ for ED (economic dispatch) of units for given P_demand (=P_D). Many of the existing conventional methods fail to impose P-limits at violating units. Improper selection of initial value for λ may cause slow convergence or at times leads to divergence for the conventional algorithms. Further, for each specified P_D , the problem is to be attempted a fresh with a new guess value of λ. If the load varies from (P_D)_min to (P _D)_max on the plant having K-units, the solution time becomes significantly large for higher values of K. Unlike this, the proposed algorithm always offers the solution in a noniterative mode with very low solution time as it is computationally very fast. The proposed algorithm is tested on K=38 units and the results are reported in the paper