Optimal power flow based ATC calculation incorporating probabilistic nature of wind

This paper presents a probabilistic assessment of Available Transfer Capability (ATC) in the presence of intermittent wind resources in the power system. An optimal power flow based approach is taken into account to calculate ATC wherein wind resources are considered as an equivalent active power generation placed in the transmission system. Probabilistic nature of wind is incorporated by considering wind velocity as a Weibull distributed random variable. 20,000 wind velocity samples are extracted using Monte Carlo Sampling (MCS) technique. Wind leveling procedure is utilized, where the various wind samples are segregated into 18 different wind levels which are formulated based on the wind speed. For the purpose of study a Modified IEEE 24 bus reliability test system is considered. The optimal location for the wind farm is decided based on Voltage sensitivity indices.