Progress on Wind Turbine Real-time Digital Twin Demonstration and Its Significance on Power System

Abstract

The traditional power system stability and operation suffers from uncertainty from both renewable power supply and demand sides, and to address this problem, power system industry worldwide takes grid digitalization as a necessary methodology. This work presents progress on wind turbine real-time digital twin engineering demonstration and validation in an experimental wind farm for the first time. Wind turbine digital twin including standardized scheme, model framework, validation methodology and the corresponding hardware are described in details in this paper. The main component loads and rotor wind speed estimation, as two core outputs of wind turbine digital twin, are analysed in time/frequency domain or statistics by comparison with onsite measurements. In order to handle the above uncertainties from wind power, this study proposes two digital twin application frameworks in future digital grid: open loop scenario and closed loop scenario, and makes detailed analysis of wind turbine digital twin's significance on renewable power system. Of the most important, this study proposes interface openness from wind turbines to power grids on two levels that will play a fundamental role in grid digitalization.