Abstract
For grid-connected DFIG-based wind turbine, Fault Ride Through (FRT) or Low Voltage Ride Through (LVRT) capability is vital problem that need to be improved. This paper proposes an Active Disturbance Rejection Control (ADRC) strategy applied to Doubly Fed Induction Generator (DFIG) based Wind turbine (WT), which integrates a Dynamic Voltage Restorer (DVR). The DVR connect in series the DFIG output terminal and the utility grid. The ADRC scheme of the new topology DFIG-based WT with integrated DVR is designed to compensate grid voltage disturbances, which in turn meet LVRT requirement and increase the level of wind power penetration. The performance of this WT-DFIG-DVR structure is investigated in different operating scenarios in order to show the skills of the designed controllers.
Highlights
In recent years, renewable energy production has made great strides around the world to meet the challenge of drastic climate change and increasing demand for energy [1]
Further development of this wind turbine topology is imperatively limited by Low Voltage Ride Through (LVRT) capability, which is dictated by most grid codes to operate under voltage sags at Point of common coupling (PCC) and remain connected to the grid to support voltage during and postfault [7][8]
doubly fed induction generator (DFIG)-based Wind turbine (WT) with Dynamic Voltage Restorer (DVR) previously designed is simulated in MATLAB-Simulink environment as shown in Figure 8 and Figure 9
Summary
Renewable energy production has made great strides around the world to meet the challenge of drastic climate change and increasing demand for energy [1]. To meet the LVRT requirement of GCR, the DFIG behavior during and after voltage sags must be examined as follows: (1) electromagnetic torques and turbines speed should be suitably controlled to ensure safe operation [1,8,11]; (2) overvoltage and overcurrent in rotor and stator windings should be limited to avoid damaging the BTB converters [10,11]; (3) voltage of DC-link must remain constant to ensure the desired operation of the GSC and RSC [1,8,12]; (4) sufficient reactive power is needed to support grid recovery [1,2,3,4,5,6,7,8,9,10,11,12,13].
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