Robust Stabilization of Single Area LFC Loop through Extended State Observer
Rittu Angu1, R. K. Mehta2
1Rittu Angu,  M. Tech in Power System Engineering, NERIST Deemed University, Nirjuli ( Arunachal Pradesh), India.
2Dr. R. K. Mehta,  Assoc. Prof. Department of Electrical Engineering, NERIST, Nirjuli,( Arunachal Pradesh), India.
Manuscript received on March 16, 2015. | Revised Manuscript received on April 22, 2015. | Manuscript published on April 30, 2015. PP: 66-67 | Volume-4 Issue-4, April 2015. | Retrieval Number:  D3877044415/2013©BEIESP

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Abstract: An Extended State Observer (ESO) based design approach has been presented for a Load Frequency Control (LFC) loop of a single area. The design approach utilizes the full state feedback as well as an estimated signal for parameter uncertainty and disturbances due to load demand changes to form the control law. The ESO-based design approach is capable of estimating state as well as disturbances together in order to compensate system in presence of parameter uncertainty and disturbances due to load demand changes. The proposed design methodology achieves performance satisfying the specified stability margins. The methodology provides a control over peak values of the frequency and control signal deviations which may be utilized to meet hardware constraints. An illustrative example illustrates the effectiveness of the developed methodology.
Keywords: Load frequency control, Control area, Extended state observer, Augmented system, MATLAB simulation.