Heuristic solution for the nonconvex dispatch of generation in power systems with high wind power share

Wind energy has drawn much attention recently due to its competitiveness compared to other renewable sources of energy, as well as its high benefits to the reduction of emissions and to the reduction of the dependency on fossil fuels. In this paper, a stochastic economic dispatch formulation is proposed to incorporate the impact of the variability of wind generation on the ramp rate limits constraints. The purpose of this method is to limit the probability of generation plus reserve not meeting the load due to the aggregated variability of the wind generation and the load demand. To better represent the conditions in real power systems, the cost of modern thermal units with multiple valves is considered. The problem is nonconvex and complex; therefore, a hybrid heuristic solution method is used. Numerical results, including sensitivity analysis, are reported and discussed based on a modified IEEE 30-bus test system.