Abstract: The economic load dispatch algorithm is studied for power plant with many units.We programme these algorithm named power plant economic load dispatch(PPELD) and load the software in the teacher computer of power plant network training simulator.For the first time,the three economic dispatch methods,equal tiny increase ratio method,float coded genetic algorithm,mutative scale chaos optimization algorithem,are put together in PPELD.The re sults with these three methods are given.Considerable economic benefit will obtained for the power plant when the PPELD run in the training simulator.