Fault Ride Through Technique for DFIG-based Wind Turbines Under Grid Three-phase Faults

Abstract

In modern power systems with increasing penetration of wind turbines (WTs), improvement of low voltage ride through (LVRT) capability of WTs equipped with doubly-fed induction generators (DFIGs) is an important topic. Thus, this paper proposes an LVRT strategy and compares its performance with a widely used conventional LVRT strategy. The proposed strategy is designed with a capacitor connected in series with an inductor and both are connected in parallel to a resistor. This configuration is then connected to the ac side of the rotor side converter (RSC) via an R-L circuit. To validate the performance of the proposed scheme, three phase fault condition is simulated and analysed. Based on simulation results obtained in MATLAB/Simulink, there is significant improvement achieved in the stated objectives compared to the conventional LVRT scheme. Index Terms-Conventional crowbar scheme, doubly-fed induction generator (DFIG), fault ride through (FRT), low voltage ride through (LVRT), and wind turbines (WTs). I.

RETRACTED: Enhancing the low-voltage ride-through capability of a wind turbine double-fed induction generator using hybrid model contains an adaptive neurofuzzy inference system controller and a crowbar circuit.

“…A double protection scheme is used in [36], the first is a CB circuit to protect the RSC, while the other is a CC to guard the DCL. Makolo in [37] suggested method consists of a capacitance in cascade with an inductance and the combination is linked in shunt to a resistance. This scheme is joined to the RSC through L-R branch.…”

Wind energy conversion technologies and engineering approaches to enhancing wind power generation: A review

“… Based on DFIG technology Enhancing system's FRT capability and protection Enhancing power quality of grid connected system through the employment of low voltage ride through (LVRT) scheme that was designed as capacitor-inductor series connection and capacitor/inductor-resistor parallel connection. [ 95 ] Estimating the impact of rotor current attenuation process on the power generation stability and devices based on the real-time data service (RTDS) and physical controller of converter in helping to enhance power quality by maintaining the safety protection for power devices. [ 96 ] Enhancing power quality by employing non-superconducting fault current limiter based on bridge-type flux coupling method.…”

“…Accordingly, DFIG-based WECS with varying power capacities was proposed to be enhanced by improving its FRT capability along with maintaining its operation safety based on different methods and protection schemes. For instance, the power quality of the grid connected DFIG system was considered to be enhanced by employing low voltage ride through (LVRT) strategy that was developed as capacitor-inductor series connection and capacitor/inductor-resistor parallel connection [ 95 ]; the impact of rotor current attenuation process on the DFIG system components and power stability was studied based on the real-time data service (RTDS) and physical controller in enabling the enhancement of power quality and power devices protection [ 96 ]. In addition, non-superconducting fault current limiter that was based on bridge-type flux coupling method [ 97 ]; external retrofit and internal control techniques [ 98 ]; and dynamic voltage resistor (DVR)-FLC technique [ 99 ] were also proposed to enhance FRT capability based on the modeling of DFIG system components.…”

Improvement and Analysis of Phase-Phase Failure of Double Feed Induction Generator Using Maximum Power Monitoring Method

“…In addition; the stator of DFIG is directly connected to the grid; for this reason, its delicacy against grid failures increases. High stator current may occur due to the voltage failures in the grid [7,8,9,10].…”

“…The impact of voltage dips on wind turbine generator was worked in [11]. The behavior of DFIG during the balanced dips was worked in the references [7,9,10]. The theoretical analysis ways in [7,9,10] are applied in wide range in the related studies, but how DFIG reacts has not been examined when a dip occurs at the moment of the maximum power tracing [12].…”