Enhanced lambda iteration algorithm for the solution of large scale economic dispatch problem

In this paper, enhanced lambda iteration (ELI) algorithm is developed for solving the economic dispatch (ED) problem of thermal units considering generator constraints for a lossless system. In classical lambda iteration technique, improper selection of initial value of lambda (incremental cost) may cause slow convergence and thus leads to divergence. The presented algorithm is capable of handling the problem by considering the concept of equal incremental cost criterion for deciding the value of initial lambda and also the equality and inequality constraints are handled easily. The algorithm is tested on small and large scale thermal generating units showing the feasibility of the algorithm.