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Model Reference Adaptive System-Based Sensorless Speed Control of Grid-Connected Doubly Fed Induction Generator in Wind Energy Conversion System

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Iranian Journal of Science and Technology, Transactions of Electrical Engineering Aims and scope Submit manuscript

Abstract

This paper presents a speed sensorless method for the vector control of grid-connected doubly fed induction generator (DFIG) in wind energy conversion system. The sensorless method is based on the model reference adaptive system (MRAS) which utilizes instantaneous and steady-state values of a fictitious ohmic quantity (R), respectively. The dimension of this fictitious quantity is ohm (Ω) that has no physical significance. The sensorless scheme, R-MRAS does not require any estimation of flux and is also independent of stator/rotor resistances. A detailed simulation study, in this regard, is done in MATLAB/Simulink. The simulated results are also verified experimentally by a dSPACE-1103-based DFIG-DC machine laboratory prototype.

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Abbreviations

\(v_{\mathrm{ds}} ,v_{\mathrm{qs}}\),\(v_{\text{dr}} ,v_{\text{qr}}\) :

d–q-axis components of stator and rotor voltage vector (V)

\(v_{\text{abs}} ,v_{\text{bcs}}\) :

Stator line–line voltages (V)

\(i_{\text{ds}} ,i_{\text{qs}}\), \(i_{\text{dr}} ,i_{\text{qr}}\) :

d–q-axis components of stator and rotor current vector (A)

\(i_{\text{as}} ,i_{\text{bs}}\)(\(i_{\text{ar}} ,i_{\text{br}}\)):

Stator (rotor) line currents (A)

\(\omega_{\text{r}} ,\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\frown}$}}{\omega }_{\text{r}}\) :

Actual, estimated rotor speed (rad/s)

\(\omega_{\text{ms}}\) :

Speed of stator flux (rad/s)

\(R_{\text{r}} ,R_{\text{s}}\) :

Rotor, stator resistances (Ω)

\(L_{\text{r}} ,L_{\text{s}} ,L_{\text{m}}\) :

Rotor self-inductance, stator self-inductance, magnetizing inductance (H)

\(\sigma = 1 - L_{\text{m}}^{2} /\left( {L_{\text{s}} L_{\text{r}} } \right)\) :

Machine leakage factor

\(p\) :

‘\({{\text{d}} \mathord{\left/ {\vphantom {{\text{d}} {{\text{d}}t}}} \right. \kern-0pt} {{\text{d}}t}}\)’ operator

^,*, superscript \(s\) :

Estimated, reference and stationary quantities

\(\theta_{\text{ms}} ,\theta_{\text{sl}}\) :

Stator flux position and slip angle (elect. rad)

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Authors and Affiliations

  1. Electrical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India

    Rahul Kumar & Sukanta Das

Authors
  1. Rahul Kumar
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  2. Sukanta Das
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Corresponding author

Correspondence to Rahul Kumar.

Appendix

Appendix

See Tables 2, 3 and 4.

Table 2 DFIM parameters for the proposed study
Full size table
Table 3 DC machine (separately excited) parameters
Full size table
Table 4 Controller parameters
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Kumar, R., Das, S. Model Reference Adaptive System-Based Sensorless Speed Control of Grid-Connected Doubly Fed Induction Generator in Wind Energy Conversion System. Iran J Sci Technol Trans Electr Eng 44, 129–140 (2020). https://doi.org/10.1007/s40998-019-00196-5

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  • DOI: https://doi.org/10.1007/s40998-019-00196-5

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