This paper proposes a data-driven approach for monitoring the operative conditions of wind turbines in wind farms. An ensemble of polynomial regression models with l1-norm regularization is derived via pairs bootstrap, to predict the active power produced and to provide a reliable prediction interval. Further, to improve the prediction performance, more complex ensemble multi-models have been derived by sampling the data from different input data clusters reflecting the turbine operative conditions. These models are then combined by using a specific fuzzy membership function fitted from the experimental data. For a given turbine the models are built using as inputs the operational and non-operational (i.e., environmental) variables of the turbine. Then, in order to improve the prediction accuracy, other correlated wind-field information, provided by the environmental variables measured by the nearby turbines have been added as further input regressors as these came from a distributed sensors network. The proposed methods have been designed and validated on experimental data from the Supervisory Control And Data Acquisition (SCADA) system of five turbines in a wind farm in Italy.

Experimental Prediction Intervals for Monitoring Wind Turbines: An Ensemble Approach

Cascianelli S.;Astolfi D.;Costante G.;Castellani F.;Fravolini M. L.
2019

Abstract

This paper proposes a data-driven approach for monitoring the operative conditions of wind turbines in wind farms. An ensemble of polynomial regression models with l1-norm regularization is derived via pairs bootstrap, to predict the active power produced and to provide a reliable prediction interval. Further, to improve the prediction performance, more complex ensemble multi-models have been derived by sampling the data from different input data clusters reflecting the turbine operative conditions. These models are then combined by using a specific fuzzy membership function fitted from the experimental data. For a given turbine the models are built using as inputs the operational and non-operational (i.e., environmental) variables of the turbine. Then, in order to improve the prediction accuracy, other correlated wind-field information, provided by the environmental variables measured by the nearby turbines have been added as further input regressors as these came from a distributed sensors network. The proposed methods have been designed and validated on experimental data from the Supervisory Control And Data Acquisition (SCADA) system of five turbines in a wind farm in Italy.
2019
978-1-7281-2292-2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1471928
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