Economic Load Dispatch (ELD) for a 3-bus power system. ELD is an optimization problem that determines the optimal power generation levels for each generator in the system to meet the load demand while minimizing the total generation cost. The code formulates this ELD problem as a quadratic programming (QP) problem and uses the quadprog function to find the optimal generator outputs and the associated minimum generation cost. The results include the generator outputs and the total generation cost, helping to achieve efficient and cost-effective power generation in the 3-bus system.