On the Impact of Stochastic Loads and Wind Generation on Under Load Tap Changers

This paper compares different models and implementations of the controllers of Under Load Tap Changers (ULTCs) and the impact on such models due to stochastic variations of load power consumption and wind power generation. The main goal of this paper is to show the response of different implementations of the tap changer control to uncertainty and volatility, emphasizing the need of time domain analysis and precise modeling. The case study considers a reduced Irish medium voltage distribution network fed by an ULTC with and without the inclusion of a local wind power plant.