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Volume 14
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10.3390/en14040863
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Article

Load Frequency Regulator in Interconnected Power System Using Second-Order Sliding Mode Control Combined with State Estimator

by
Anh-Tuan Tran
1,
Bui Le Ngoc Minh
2,3,
Van Van Huynh
1,*,
Phong Thanh Tran
1,
Emmanuel Nduka Amaefule
1,
Van-Duc Phan
4 and
Tam Minh Nguyen
2
1
Modeling Evolutionary Algorithms Simulation and Artificial Intelligence, Faculty of Electrical & Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
2
Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 700000, Vietnam
3
Faculty of Industrial Engineering, Tien Giang University, My Tho City 840000, Vietnam
4
Faculty of Automobile Technology, Van Lang University, Ho Chi Minh City 700000, Vietnam
*
Author to whom correspondence should be addressed.
Energies 2021, 14(4), 863; https://doi.org/10.3390/en14040863
Submission received: 15 January 2021 / Revised: 29 January 2021 / Accepted: 4 February 2021 / Published: 7 February 2021
(This article belongs to the Special Issue Advanced Control Applications for Electrical Energy Systems)
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Abstract

In multi-area interconnected power systems (MAIPS), the measurement of all system states is difficult due to the lack of a sensor or the fact that it is expensive to measure. In order to solve this limitation, a new load frequency controller based on the second-order sliding mode is designed for MAIPS where the estimated state variable is used fully in the sliding surface and controller. Firstly, a model of MAIPS integrated with disturbance is introduced. Secondly, an observer has been designed and used to estimate the unmeasured variables with disturbance. Thirdly, a new second-order sliding mode control (SOSMC) law is used to reduce the chattering in the system dynamics where slide surface and sliding mode controller are designed based on system states observer. The stability of the whole system is guaranteed via the Lyapunov theory. Even though state variables are not measured, the experimental simulation results show that the frequency remains in the nominal range under load disturbances, matched and mismatched uncertainties of the MAIPS. A comparison to other controllers illustrates the superiority of the highlighted controller designed in this paper.
Keywords: load frequency control; multi area power system; sliding mode control load frequency control; multi area power system; sliding mode control

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MDPI and ACS Style

Tran, A.-T.; Minh, B.L.N.; Huynh, V.V.; Tran, P.T.; Amaefule, E.N.; Phan, V.-D.; Nguyen, T.M. Load Frequency Regulator in Interconnected Power System Using Second-Order Sliding Mode Control Combined with State Estimator. Energies 2021, 14, 863. https://doi.org/10.3390/en14040863

AMA Style

Tran A-T, Minh BLN, Huynh VV, Tran PT, Amaefule EN, Phan V-D, Nguyen TM. Load Frequency Regulator in Interconnected Power System Using Second-Order Sliding Mode Control Combined with State Estimator. Energies. 2021; 14(4):863. https://doi.org/10.3390/en14040863

Chicago/Turabian Style

Tran, Anh-Tuan, Bui Le Ngoc Minh, Van Van Huynh, Phong Thanh Tran, Emmanuel Nduka Amaefule, Van-Duc Phan, and Tam Minh Nguyen. 2021. "Load Frequency Regulator in Interconnected Power System Using Second-Order Sliding Mode Control Combined with State Estimator" Energies 14, no. 4: 863. https://doi.org/10.3390/en14040863

APA Style

Tran, A.-T., Minh, B. L. N., Huynh, V. V., Tran, P. T., Amaefule, E. N., Phan, V.-D., & Nguyen, T. M. (2021). Load Frequency Regulator in Interconnected Power System Using Second-Order Sliding Mode Control Combined with State Estimator. Energies, 14(4), 863. https://doi.org/10.3390/en14040863

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