Abstract
Under power system short-circuits, the Doubly-Fed Induction Generator (DFIG) Wind Turbines (WT) are required to be equipped with crowbar protections to preserve the lifetime of power electronics devices. When the crowbar is switched on, the rotor windings are short-circuited. In this case, the DFIG behaves like a squirrel-cage induction generator (SCIG) and can adsorb reactive power, which can affect the power system. A DFIG based-fault-ride through (FRT) scheme with crowbar, rotor-side and grid-side converters has recently been proposed for improving the transient stability: in particular, a hybrid cascade Fuzzy-PI-based controlling technique has been demonstrated to be able to control the Insulated Gate Bipolar Transistor (IGBT) based frequency converter in order to enhance the transient stability. The performance of this hybrid control scheme is analyzed here and compared to other techniques, under a three-phase fault condition on a single machine connected to the grid. In particular, the transient operation of the system is investigated by comparing the performance of the hybrid system with conventional proportional-integral and fuzzy logic controller, respectively. The system validation is carried out in Simulink, confirming the effectiveness of the coordinated advanced fuzzy logic control.
Highlights
The presence of renewable energy among conventional energy resources is increasing day by day.There are several renewable sources like wind, solar, fuel cell and bio-gas, which are getting popular, and more investments are focused in the renewable energy sector
This paper presents the models developed in Matlab/Simulink for a wind power plant based on Doubly-Fed Induction Generator (DFIG) equipped with crowbar protection, tested during high perturbations occurring on the power system
The reactive power generated by the voltage control logic of grid side converter (GSC) and rotor side converter (RSC) has an opposite variation compared to the conventional scheme of RSC and GSC, as the DFIG with fault-ride-through control logic is used to maintain the voltage at point of common coupling (PCC)
Summary
The presence of renewable energy among conventional energy resources is increasing day by day. Several works previously addressed the DFIG control performance during normal operating conditions [11,26,27]: in this scenario, the conventional DFIG without fault-ride-through capability and the crowbar protects the electronic equipment This case may lead to system instability, as the RSC is blocked due to crowbar activation and the reactive power control is lost. This paper presents the models developed in Matlab/Simulink for a wind power plant based on DFIG equipped with crowbar protection, tested during high perturbations occurring on the power system This is achieved with an advanced coordinated fuzzy-proportional-integral control of transistors-based converter for transient stability improvement. Ride Through (LVRT) control scheme; in Section 5, results are reported and discussed, and the last section presents the conclusion
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
