Experimental validation of SMC-based DTC-VC for DFIG-WECS

  • Kiran Kumar JaladiEmail author
Original Paper


This paper proposes the decoupling control of direct torque control (DTC) and vector control (VC) for doubly fed induction generator (DFIG)-based wind energy system (WES). DTC controls the generator speed, torque and rotor flux; similarly VC regulates the capacitor link voltage and power quality of grid. Furthermore, proposed technique analyzed with sliding mode control (SMC) and conventional controllers independently. SMC shows better improvements of both stator and rotor currents, capacitor link voltage, torque and generator speed in contrast to proportional and integral controller. The proposed DTC-VC aims to improve performance of transient and dynamic behavior of DFIG-based WES during sine nature of torque and random as well as step change variation of generator speed. It is also tested in real-time environment at 7.5 hp as well as MATLAB/Simulink of 5.5 kw rating.


Doubly fed induction generator Wind energy system Sliding mode control Direct torque control 


\(\beta \)

position of blade angle

\(\lambda \)

turbine coefficient

\(\mathop {i}\nolimits _\mathrm{ds} \), \(\mathop {i}\nolimits _\mathrm{qs} \) and \(\mathop {i}\nolimits _\mathrm{dr} \), \(\mathop {i}\nolimits _\mathrm{qr} \)

stator, rotor dq-axis currents

\(\mathop {P}\nolimits _\mathrm{s}\)

active and reactive

\(\mathop {Q}\nolimits _\mathrm{s}\)

reactive and reactive

\(\mathop {T}\nolimits _\mathrm{e}\)

electromagnetic torque

\(\mathop {V}\nolimits _\mathrm{ds} \), \(\mathop {V}\nolimits _\mathrm{qs} \) and \(\mathop {V}\nolimits _\mathrm{dr} \), \(\mathop {V}\nolimits _\mathrm{qr} \)

stator, rotor dq-axis voltages

\(\mathop {k,k}\nolimits _1,\mathop {k}\nolimits _2,\mathop {k}\nolimits _3\)


\(\rho \)

air density

\(R_\mathrm{s}\), \(R_\mathrm{r}\)

resistance of stator and rotor

\({\omega _\mathrm{r}}\)

rotating speed of rotor


power coefficient


wind velocity


conventional direct torque control


doubly fed induction generator


direct power control


grid side converter


pole pair


pulse width modulation


length of the blade


renewable energy


rotor side converter


sliding mode control


space vector modulation


vector control


wind energy



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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Electrical EngineeringNational Institute of TechnologyKurukshetraIndia

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