Robust Higher Order Observer Based Non-linear Super Twisting Load Frequency Control for Multi Area Power Systems via Sliding Mode

Dev, Ark; Sarkar, Mrinal Kanti

doi:10.1007/s12555-018-0529-4

Cited by 25 publications

(20 citation statements)

References 28 publications

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“…With the aim of improving the system performance, first-order SMC based on an observer has been used to observe the load disturbance of the power network given in [30,31]. Also, SOSMC combined with a state estimator has been used to observe the disturbance of the MAPS to improve the system performance with making it free of chattering [32,33]. These controllers above were designed to observe the load change and keep the frequency at nominal if all the system state variables are measured.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Introductionmentioning

confidence: 99%

“…The integral sliding surface (ISS) and the decentralized controller are designed based on the estimated system state variables (SSV) so that we do not need to measure the power SSV to achieve LFC. Therefore, the limitation of measuring the power system state variables to achieve LFC in [32,33] has been solved.…”

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confidence: 99%

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

et al. 2021

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“…In the recent years, several nonlinear and robust control schemes have been employed for the stability and tracking control of DC-DC buck converters [9]. Among them, the sliding mode control (SMC) as an effective robust control method has received many applications because of its exceptional robustness against uncertainties and disturbances, guaranteed stability properties, computational and implementation easiness, fast response and excellent transient performance with respect to other control schemes [10,11]. The sliding mode control method has been prosperously applied to a broad diversity of practical linear and nonlinear systems such as nonholonomic systems [12,13], robot manipulators [14], aircraft [15], spacecraft [16,17], underwater vehicles [18], chaotic systems [19], electrical motors [20], and power systems [21,22].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Global Sliding Mode Controller Design for Perturbed DC-DC Buck Converters

et al. 2021

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This paper proposes a novel adaptive intelligent global sliding mode control for the tracking control of a DC-DC buck converter with time-varying uncertainties/disturbances. The proposed control law is formulated using a switching surface that eliminates the reaching phase and ensures the existence of the sliding action from the start. The control law is derived based on the Lyapunov stability theory. The effectiveness of the proposed approach is illustrated via high-fidelity simulations by means of Simscape simulation environment in MATLAB. Satisfactory tracking accuracy, efficient suppression of the chattering phenomenon in the control input, and high robustness against uncertainties/disturbances are among the attributes of the proposed control approach.

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“…The main focus of this article is robust SMC and its application on load frequency problems in power systems. To the best of our knowledge, authors have so far considered a linearized model of power system for the SMC design as in [15,[22][23][24][25][26][27][28]. Only a few works consider power systems partitioned into control areas with nonlinear coupling between them as in [29,30].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear disturbance observer based adaptive super twisting sliding mode load frequency control for nonlinear interconnected power network

Dev

Anand

Sarkar

2020

Asian Journal of Control

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This article revisits the study of load frequency control (LFC) problem in an interconnected nonlinear power network under mismatched disturbance.Unlike previous works, a more realistic interconnected power network with nonlinear coupling between control areas and also including nonlinearities like generation rate constraint (GRC) and governor dead band (GDB) is under study. An adaptive super twisting sliding mode controller (ST-SMC) is designed based on system states and estimated disturbance. The nonlinear disturbance observer (NDO) estimates the mismatch between the electrical and mechanical power and then the estimated value is employed in the controller design to compensate the disturbance. The proposed control scheme ensures faster frequency and tie-line power stabilization compared with techniques existing in the literature. The robustness of the proposed design is validated under random varying step load disturbance and with two area four machine Kundur's test system. The closed loop system stability is theoretically proved using the Lyapunov function. Simulation results confirm the effectiveness of the proposed design in a two-area interconnected power network.

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Robust Higher Order Observer Based Non-linear Super Twisting Load Frequency Control for Multi Area Power Systems via Sliding Mode

Cited by 25 publications

References 28 publications

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

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

Adaptive Global Sliding Mode Controller Design for Perturbed DC-DC Buck Converters

Nonlinear disturbance observer based adaptive super twisting sliding mode load frequency control for nonlinear interconnected power network

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