Linking the Researchers, Developing the Innovations Manuscripts submittal opens till 10 May 2024. Please submit your papers at or

  • Volume 2016

    Frequency Regulation Control of Wind Turbine Incorporating Stepper Motor in Pitch System
    (International Journal of Engineering Works)

    Vol. 3, Issue 5, PP. 32-35, May 2016
    Keywords: Generator, Wind Turbine, stepper motor, Pitch actuator, Proportional Integral controller

    Download PDF


    This paper describes the presentation of a stepper motor in the pitch control system to regulate frequency. The controller sense the frequency deviation. If the frequency deviation is positive the stepper motor will recommend the motor to pitch the turbine blade slightly away from wind pressure. Similarly if the frequency deviation is negative the stepper motor will recommend the motor to pitch the turbine blade slightly towards wind pressure. The blade pitching is performed by another motor. The frequency controlled by conventional hydraulic mean is costly complex and quite slow in response. They consume enough time during big load changes. In this research a stepper motor is being used for frequency control. A stepper motor is economical capable of fast action and easy to control. The position of the stepper motor is controlled by a PI Proportional Integral controller. Thus a proposed frequency control system incorporating a stepper motor in pitch control system is modeled, designed and simulated in Matlab/ Simulink. The frequency control through stepper motor improves the Transient and steady state performances are enhanced and moreover it reduces frequency spikes


    Syed Zikriya Shah is a student of University of Engineering & Technology Peshawar in postgraduate studies MSc Electrical Power Engineering. Research Area of interest is Renewable Energy, Power Control & Power Generation. Email

    Professor Dr.Muhammad Naeem Arbab is professor in University of Engineering & Technology in Electrical Department .He is author of two power engineering books High Voltage Engineering and Electric Power Generation with more than 25 research publication Email

    Full Text


    Syed Zikriya Shah, Muhammad Naeem Arbab, "Frequency Regulation Control of Wind Turbine Incorporating Stepper Motor in Pitch System" International Journal of Engineering Works, Vol. 3, Issue 5, PP. 32-35, May 2016.                                                                                   


    [1]   Er.R.K.Rajput, “Non Conventional Energy Sources and Utilization,”1st ed. S Chand & Company New Delhi, India.

    [2]   National Renewable Energy Limited,

    [3] P.Kundar, “Power System Stability and Control,,”  2nd ed. McGraw Hill New York, America.

    [4]  Hadi Sadat, “Power System Analysis”  3rd ed.McGraw Hill New York America .

    [5]  A. Nigussie and M.Manno, “ A Novel Scheme of Controlling the Frequency of a Standalone Micro Hydro Plant” Electrical and Power Engineering Frontier. Volume 2 (3) Page 59-63,Sep 2013.

    [6] V.Ramakrishnan and S.K.Srivasta. Pitch control of wind turbine generator using new mechanism

    [7] C.Erdal “ Determination of the optimum tolerance fora permanent magnet step motor a sensitivity approach” conference on electrotechnical conference,May 1998

    [8]  Abdul Hamed Hwas and Reza Katebi “wind turbine using PI Pitch angle controller” conference on IFC conference,March 2012

    [9]  Asia Commerce Import and Export Corporation, IFC Brushless Three Phase Synchronous Generator, Shanghai, 2009.

    [10] Motioning Motor Industry Co.Ltd, Stepper Motor, and,accessed in Feburuary.2010.