New transmission planning model

A model for optimal long-range transmission planning is proposed. The model is capable of dealing with both static and dynamic modes of transmission planning. Given the existing network and anticipating a requirement for future facilities and loads, an accurate nonlinear cost function for the system is formulated. It includes both the fixed and the variable costs for all planned lines, in addition to the cost of the power losses. The cost function is minimized subject to demand satisfaction and overloading constraints. The model includes security constraints on bus voltage magnitudes and swing angles. The AC load flow solution is included in the optimization model. The results of applying the model to a previously reported power system from the literature are discussed