Onshore wind farm fast wake estimation method : critical analysis of the Jensen model.

摘要

Wind energy is the most rapidly expanding source of renewable energy in the UK and has suppliedud5% of the country’s electricity requirements since 2010. With finite space available for futureuddevelopment, investors and manufacturers are constantly looking for new methods to increase theudefficiency of both active and planned wind farms.udWind turbine wake effects are a common cause of energy loss within a wind farm; capable ofudreducing a trailing turbine’s output by up to 30%. Through the use of wake estimation models, windudfarms can be designed and operated to reduce the wake effects experienced by turbines.udThe Jensen model is a fast wake estimation model, derived from the momentum equation, capableudof providing wind speed and wake radius values at distances downstream of a turbine. Theudsimplicity and low computation time of the model have made it highly popular in the commercialudmarket. This paper critically reviews the Jensen model for on-shore wind farms. This criticaludreview demonstrates that the Jensen model is appropriate as a rapid wake estimator that can be usedudas part of an on-line wind farm control system for wake optimisation.