Economic Load Dispatch for a power system with renewable energy using Direct Search Method

The inclusion of a significant amount of renewable energy into power systems, which is set to increase significantly in the near future, has resulted in additional constraints on economic load dispatch (ELD) such as more unpredictable ramp rate and the need for additional reserves to accommodate the intermittent nature of the output. This condition may not match with the system load demand in a power system. A direct search method (DSM) using 'negative load' and 'inclusive' approaches to ELD, which takes account of the variable wind generation, is proposed and discussed and compared with previously reported genetic algorithm (GA) method.