A Mixed-Integer Linear Programming Model for Multi-Objective Dynamic Transmission Network Expansion Planning Considering Voltage Stability

Regarding the load increase, transmission network expansion planning (TNEP) is of vital importance. The aim of TNEP is to determine the installation, location, and time of equipment, including lines and transformers. On the other side, network security and voltage stability is one of main challenges of power systems. In this paper, it is focused on dynamic transmission network expansion planning by considering voltage stability constraint. The proposed model tries to minimize total expansion cost and maximize voltage stability margin. To make the TNEP more accurate, the annual load duration curve has been considered for the loads. The developed model uses loading margin for the voltage stability analysis, and the optimization problem has been solved based on AC power flow and MILP model. The problem is modeled as a multi-objective optimization where fuzzy satisfaction technique is employed to choose the final solution. Applying the proposed model on the IEEE 24-bus system within the GAMS environment demonstrate efficiency of the conducted approach in increasing voltage stability in TNEP.