Fast response simulator for flow over a complex terrain: A case study

摘要

Kongsberg Renewables Technology (KRT) is currently developing a wind farm management system (Kongsberg EmPower). Objectives of Kongsberg EmPower are to optimize the total power from the wind farm, forecast the power production and to monitor the performance and condition of the wind turbines. As a component in Kongsberg EmPower, Kongsberg Renewables Technology and SINTEF are running a project (KonWake) to develop a fast response simulator for the flow field through a wind farm, intended for on-line updating/correction. The simulation model contains simplified representations of terrain effects, wave interactions, and turbine wakes. The simulator consists of a pre-processor, a wind model which is based on the mass consistent approach and a post-processor. The wind model is validated with Bolund hill data and the predictions are satisfactory where the flow remains attached. The consequence of adding simplified representations of lee effects to the model is demonstrated. Mass consistent simulations are carried out for a real complex terrain, and the resulting flow field has been analysed to see how it depends on the initial flow field.