• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2023, Volume: 16, Issue: 10, Pages: 756-763

Original Article

Impact of an Unsymmetrical Fault on the Controller of the DFIG Wind Farm

Received Date:09 December 2022, Accepted Date:13 February 2023, Published Date:11 March 2023


Objectives: DFIG-based wind farms are predominant in their performance when compared to other types of generators. In the field study, due to transient events, converters at the machine side and grid side are affected. To protect the converters from an abnormal operation, overcurrent protective relays have to be designed and incorporated. Unsymmetrical fault analysis are help in the design of protective devise and speed sensors. Methods: DFIG-based wind systems are developed using the DIgSILENT power factory software and EMT simulations are executed during the unsymmetrical faults applied near the Machine Side Converter (MSC) and Grid Side Converter(GSC). Findings: During the simulation studies, various parameters are transient time, maximum current, steady-state, and voltage drop identified near the MSC and GSC. The short circuit parameters are attenuated during the unsymmetrical faults and the rotor maximum current increases by 2 to 3 times the rated current per unit, 40% to 50% voltage dip, and the current reach the steady state value after 1.213 sec during the fault. The parameters are affected more when a fault occurs near the GSC when compared to a fault near MSC. Novelty: These research findings will contribute to a better understanding and improvement of sensor sensitivity, as well as the development of control mechanisms, and protection tactics in designing more accurate and appropriate for DFIG-WT.

Keywords: DoublyFed Induction Generator; Machine Side Controller; Grid Side Controller; Unsymmetrical Fault; Sensor


  1. Magesh T, Devi G, Lakshmanan T. Measurement and simulation of power quality issues in grid connected wind farms. Electric Power Systems Research. 2022;210:108142. Available from: https://doi.org/10.1016/j.epsr.2022.108142
  2. Magesh T, Chellamuthu C. Simulation and Study of Power Quality Issues in a Fixed Speed Wind Farm Substation. The Scientific World Journal. 2015;2015:1–10. Available from: https://doi.org/ 10.1155/2015/367540
  3. Fadzail SNF, Zali MM, Khairudin NHA, Hanafi. Modelling and simulation of wind turbine-based induction generator model using MATLAB/Simulink. AIP Conference Proceedings. 2021;2339:20013. Available from: https://doi.org/10.1063/5.0046120
  4. Krishna S, Patel, Vijay H, Makwana H. LVRT Fulfilment of the DFIG-based WECS During Symmetrical Grid Voltage Dips. IETE Journal of Research. 2022. Available from: https. . Available from: https://doi.org/10.1080/03772063.2022.2055658
  5. Ma J, Zhao D, Yao L, Qian M, Yamashita K, Zhu L. Analysis on application of a current-source based DFIG wind generator model. CSEE Journal of Power and Energy Systems. 2018;4(3):352–361. Available from: https://doi.org/10.17775/CSEEJPES.2018.00060
  6. Tang W, Hu J, Chang Y, Liu F. Modeling of DFIG-Based Wind Turbine for Power System Transient Response Analysis in Rotor Speed Control Timescale. IEEE Transactions on Power Systems. 2018;33(6):6795–6805. Available from: https://doi.org/10.1109/TPWRS.2018.2827402
  7. Rostami M, Madani SM, Ademi S. Sensorless Closed-Loop Voltage and Frequency Control of Stand-Alone DFIGs Introducing Direct Flux-Vector Control. IEEE Transactions on Industrial Electronics. 2020;67(7):6078–6088. Available from: https://doi.org/10.1109/TIE.2019.2955421
  8. Zhu M, Li W, Liang X, Xu S, Zhou B, Shen Y. Stepwise Voltage Drop and Transient Current Control Strategies to Enhance Fault Ride-Through Capability of MMC-HVDC Connected DFIG Wind Farms. IEEE Trans. Power Syst. 2021;36:2127–2137. Available from: https://doi.org/10.1109/TIE.2019.2955421
  9. Nazir MS, Qi W. Impact of symmetrical short-circuit fault on doubly-fed induction generator controller. International Journal of Electronics. 2020;107(12):2028–2043. Available from: https://doi.org/10.1080/00207217.2020.1756447
  10. Khalid MU, Khalid HA, Farooq H, Khan A. Unsymmetrical Fault Analysis and Protection of 1.5 MW DFIG Wind Turbine Converters. IEEC 2022. 2022;20:41. Available from: https://doi.org/10.3390/engproc2022020041
  11. Ackerman T, Soder L. An overview of wind energy status. Renewable and Sustainable Energy Reviews. 2000;6:67–127. Available from: https://doi.org/10.1016/S1364-0321(02)00008-4
  12. Nazir MS, Wang Y, Mahdi AJ, Sun X, Zhang C, Abdalla AN. Improving the Performance of Doubly Fed Induction Generator Using Fault Tolerant Control—A Hierarchical Approach. Applied Sciences. 2020;10(3):924. Available from: https://doi.org/10.3390/app10030924
  13. Krause P. Analysis of electric machinery. New York. McGraw-Hill. 2002.
  14. Chang Y, Mahseredjian J, Kocar I, Karaagac U. Analytical characterization of DFIG response to asymmetrical voltage dips for efficient design. Electric Power Systems Research. 2022;211:108553. Available from: https://doi.org/10.1016/j.epsr.2022.108553
  15. Bebars AD, Eladl AA, Abdulsalam GM, Badran EA. Internal electrical fault detection techniques in DFIG-based wind turbines: a review. Protection and Control of Modern Power Systems. 2022;7(1):18. Available from: https://doi.org/10.1186/s41601-022-00236-z
  16. Paliwal P. A State-of-the-Art Review on LVRT Enhancement Techniques for DFIG-Based Wind Turbines. In: B, RC, A, A, J, VK., eds. Lecture Notes in Electrical Engineering. (Vol. 766, pp. 131-141) Springer Singapore. 2022.


© 2023 Magesh et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)


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