The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
A Rufer - One of the best experts on this subject based on the ideXlab platform.
-
high order vector control of grid connected voltage source converters with lcl filters
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Behrooz Bahrani, Michail Vasiladiotis, A RuferAbstract:This paper proposes a vector control strategy for LCL-filter-based grid-connected voltage-source converters (VSCs). The proposed control strategy is inherently capable of attenuating the resonance phenomenon of such systems. This is an advantage over the existing methods, which require additional damping techniques. Moreover, the proposed vector control strategy is able to fully decouple the direct (d) and quadrature (q) components of the current in a rotating reference frame. The design procedure comprises a constrained optimization-based loop shaping. It utilizes the multi-input multi-output (MIMO) nonparametric model of the system along with a high-order linearly parameterized MIMO controller to form an Open-Loop Transfer Function matrix. Minimizing the second norm of the error between the Open-Loop Transfer Function matrix and a desired one, the coefficients of the controller are optimally determined. Conducting several reference tracking scenarios, the performance of the proposed vector controller is evaluated both by means of time-domain simulation studies in MATLAB/Simulink and experimental results.
-
multivariable control of single inductor dual output buck converters
IEEE Transactions on Power Electronics, 2014Co-Authors: Jaya Deepti Dasika, Alireza Karimi, Behrooz Bahrani, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical challenge of a single-inductor multiple-output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a single-inductor dual-output (SIDO) buck converter in continuous conduction mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the multi-input multi-output (MIMO) systems. The control design procedure includes: 1) determination of a family of nonparametric models of the SIDO converter at operating points of interest, 2) determination of the class of the controller, and 3) system Open-Loop shaping by the convex minimization of the summation of the square second norm of the errors between the system Open-Loop Transfer Function matrices and a desired Open-Loop Transfer Function matrix. The proposed controller minimizes the coupling between the outputs of the SIDO converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
-
A cascade voltage controller for three-phase islanded microgrids
2013 IEEE Power & Energy Society General Meeting, 2013Co-Authors: Behrooz Bahrani, A RuferAbstract:This paper proposes a cascade or multiloop digital control strategy for the voltage regulation of a three-phase islanded single distributed generation (DG) unit microgrid and its dedicated load. The cascade control strategy consists of an inner dq-currents control loop and an outer dq-voltages control loop responsible for providing the set-points of the inner loop. To design the outer loop, a constrained optimization-based loop shaping method is adopted. It uses multi-input multi-output (MIMO) nonparametric or spectral models of the system for an arbitrary number of desired operating points along with a linearly parameterized MIMO controller to form a set of Open-Loop Transfer Function matrices. Minimizing the summation of the second norm of the errors between the Open-Loop Transfer Function matrices and a desired one, the coefficients of the controller are optimally determined. Taking several load change scenarios, the performance of the proposed controller is evaluated based on time-domain simulation studies in MATLAB/PLECS.
-
Multivariable control of Single-Inductor Dual-Output buck converters
2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2013Co-Authors: Behrooz Bahrani, Alireza Karimi, Jaya Deepti Dasika, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical drawback of a Single-Inductor Multiple-Output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a Single-Inductor Dual-Output (SIDO) buck converter in Continuous Conduction Mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the Multi-Input Multi-Output (MIMO) systems. The control design procedure includes: (i) determination of the non-parametric model of a SIDO buck converter at its rated operating point, (ii) determination of the class of the controller, and (iii) converter Open-Loop shaping by convex minimization of the square second norm of the error between the converter Open-Loop Transfer Function and a desired Open-Loop Transfer Function. The proposed controller minimizes the coupling between the outputs of the SIDO buck converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
Behrooz Bahrani - One of the best experts on this subject based on the ideXlab platform.
-
high order vector control of grid connected voltage source converters with lcl filters
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Behrooz Bahrani, Michail Vasiladiotis, A RuferAbstract:This paper proposes a vector control strategy for LCL-filter-based grid-connected voltage-source converters (VSCs). The proposed control strategy is inherently capable of attenuating the resonance phenomenon of such systems. This is an advantage over the existing methods, which require additional damping techniques. Moreover, the proposed vector control strategy is able to fully decouple the direct (d) and quadrature (q) components of the current in a rotating reference frame. The design procedure comprises a constrained optimization-based loop shaping. It utilizes the multi-input multi-output (MIMO) nonparametric model of the system along with a high-order linearly parameterized MIMO controller to form an Open-Loop Transfer Function matrix. Minimizing the second norm of the error between the Open-Loop Transfer Function matrix and a desired one, the coefficients of the controller are optimally determined. Conducting several reference tracking scenarios, the performance of the proposed vector controller is evaluated both by means of time-domain simulation studies in MATLAB/Simulink and experimental results.
-
multivariable control of single inductor dual output buck converters
IEEE Transactions on Power Electronics, 2014Co-Authors: Jaya Deepti Dasika, Alireza Karimi, Behrooz Bahrani, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical challenge of a single-inductor multiple-output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a single-inductor dual-output (SIDO) buck converter in continuous conduction mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the multi-input multi-output (MIMO) systems. The control design procedure includes: 1) determination of a family of nonparametric models of the SIDO converter at operating points of interest, 2) determination of the class of the controller, and 3) system Open-Loop shaping by the convex minimization of the summation of the square second norm of the errors between the system Open-Loop Transfer Function matrices and a desired Open-Loop Transfer Function matrix. The proposed controller minimizes the coupling between the outputs of the SIDO converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
-
A cascade voltage controller for three-phase islanded microgrids
2013 IEEE Power & Energy Society General Meeting, 2013Co-Authors: Behrooz Bahrani, A RuferAbstract:This paper proposes a cascade or multiloop digital control strategy for the voltage regulation of a three-phase islanded single distributed generation (DG) unit microgrid and its dedicated load. The cascade control strategy consists of an inner dq-currents control loop and an outer dq-voltages control loop responsible for providing the set-points of the inner loop. To design the outer loop, a constrained optimization-based loop shaping method is adopted. It uses multi-input multi-output (MIMO) nonparametric or spectral models of the system for an arbitrary number of desired operating points along with a linearly parameterized MIMO controller to form a set of Open-Loop Transfer Function matrices. Minimizing the summation of the second norm of the errors between the Open-Loop Transfer Function matrices and a desired one, the coefficients of the controller are optimally determined. Taking several load change scenarios, the performance of the proposed controller is evaluated based on time-domain simulation studies in MATLAB/PLECS.
-
Multivariable control of Single-Inductor Dual-Output buck converters
2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2013Co-Authors: Behrooz Bahrani, Alireza Karimi, Jaya Deepti Dasika, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical drawback of a Single-Inductor Multiple-Output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a Single-Inductor Dual-Output (SIDO) buck converter in Continuous Conduction Mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the Multi-Input Multi-Output (MIMO) systems. The control design procedure includes: (i) determination of the non-parametric model of a SIDO buck converter at its rated operating point, (ii) determination of the class of the controller, and (iii) converter Open-Loop shaping by convex minimization of the square second norm of the error between the converter Open-Loop Transfer Function and a desired Open-Loop Transfer Function. The proposed controller minimizes the coupling between the outputs of the SIDO buck converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
I. Thirunavukkarasu - One of the best experts on this subject based on the ideXlab platform.
-
Simple Way of Tuning Centralized PI Controller for an Interacting Pilot Plant Distillation Column
Advances in Intelligent Systems and Computing, 2019Co-Authors: R. Janani, I. ThirunavukkarasuAbstract:A simple robust control technique based on centralized PI is proposed for an interacting pilot plant distillation column. The diagonal elements of the overall open loop Transfer Function of the system are reduced to first-order plus dead-time (FOPDT) model. The proposed method considers Steady-State Gain Matrix and loop Transfer Function parameters like time delay and time constant for the centralized controller design. The proposed controller method is validated using Wood and Berry distillation column and pilot plant binary distillation column. The servo response shows that the designed centralized PI controller has good robust stability and performance.
-
Design of IMC Based Independent Multi- Loop PI Controller for Interacting Pilot Plant Distillation Column
2018Co-Authors: R. Janani, I. ThirunavukkarasuAbstract:This article illustrates a novel method for the design of IMC based independent multi-loop PI controller for an interacting pilot plant distillation column. The idea of an effective Open-Loop Transfer Function is first introduced to decompose a multi-loop control system into a set of equivalent independent single loop. This open loop Transfer Function is further approximated to the reduced order form. Based on the EOTF model, the individual controller of each single loop is then independently design by applying the internal model controller based PI tuning approach for the system. This control methodology is demonstrated both in simulation and real-time environment using MATLAB/Simulink software. Also the closed loop performance indices are tabulated.
Jaya Deepti Dasika - One of the best experts on this subject based on the ideXlab platform.
-
multivariable control of single inductor dual output buck converters
IEEE Transactions on Power Electronics, 2014Co-Authors: Jaya Deepti Dasika, Alireza Karimi, Behrooz Bahrani, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical challenge of a single-inductor multiple-output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a single-inductor dual-output (SIDO) buck converter in continuous conduction mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the multi-input multi-output (MIMO) systems. The control design procedure includes: 1) determination of a family of nonparametric models of the SIDO converter at operating points of interest, 2) determination of the class of the controller, and 3) system Open-Loop shaping by the convex minimization of the summation of the square second norm of the errors between the system Open-Loop Transfer Function matrices and a desired Open-Loop Transfer Function matrix. The proposed controller minimizes the coupling between the outputs of the SIDO converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
-
Multivariable control of Single-Inductor Dual-Output buck converters
2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2013Co-Authors: Behrooz Bahrani, Alireza Karimi, Jaya Deepti Dasika, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical drawback of a Single-Inductor Multiple-Output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a Single-Inductor Dual-Output (SIDO) buck converter in Continuous Conduction Mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the Multi-Input Multi-Output (MIMO) systems. The control design procedure includes: (i) determination of the non-parametric model of a SIDO buck converter at its rated operating point, (ii) determination of the class of the controller, and (iii) converter Open-Loop shaping by convex minimization of the square second norm of the error between the converter Open-Loop Transfer Function and a desired Open-Loop Transfer Function. The proposed controller minimizes the coupling between the outputs of the SIDO buck converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
Alireza Karimi - One of the best experts on this subject based on the ideXlab platform.
-
Design of a Fixed‐Order Robust Controller to Damp Inter‐Area Oscillations in Power Systems
Journal of Power and Energy Engineering, 2016Co-Authors: Abdlmnam Abdlrahem, Parimal Saraf, Karthikeyan Balasubramaniam, Ramtain Hadidi, Alireza Karimi, Elham B. MakramAbstract:This paper presents the design of a robust fixed-order H∞ controller to damp out the inter-area oscillations and to enhance the stability of the power system. The proposed H∞ approach is based on shaping the Open-Loop Transfer Function in the Nyquist diagram through minimizing the quadratic error between the actual and the desired open loop Transfer Functions in the frequency domain under linear constraints that guarantee robustness and stability. The proposed approach is robust with respect to multi-model uncertainty closed-loop sensitivity Functions in the Nyquist diagram through the constraints on their infinity norm. The H∞ constraints are linearized with the help of a desired Open-Loop Transfer Function. The controller is designed using the convex optimization techniques in which the difference between the Open-Loop Transfer Function and the desired one is minimized. The two-area four-machine test system is selected to evaluate the performance of the designed controller under different load conditions as well as different levels of wind penetrations.
-
multivariable control of single inductor dual output buck converters
IEEE Transactions on Power Electronics, 2014Co-Authors: Jaya Deepti Dasika, Alireza Karimi, Behrooz Bahrani, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical challenge of a single-inductor multiple-output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a single-inductor dual-output (SIDO) buck converter in continuous conduction mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the multi-input multi-output (MIMO) systems. The control design procedure includes: 1) determination of a family of nonparametric models of the SIDO converter at operating points of interest, 2) determination of the class of the controller, and 3) system Open-Loop shaping by the convex minimization of the summation of the square second norm of the errors between the system Open-Loop Transfer Function matrices and a desired Open-Loop Transfer Function matrix. The proposed controller minimizes the coupling between the outputs of the SIDO converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
-
Multivariable control of Single-Inductor Dual-Output buck converters
2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2013Co-Authors: Behrooz Bahrani, Alireza Karimi, Jaya Deepti Dasika, Maryam Saeedifard, A RuferAbstract:Cross regulation is the main technical drawback of a Single-Inductor Multiple-Output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a Single-Inductor Dual-Output (SIDO) buck converter in Continuous Conduction Mode (CCM) operation. The controller design methodology originates from the Open-Loop shaping of the Multi-Input Multi-Output (MIMO) systems. The control design procedure includes: (i) determination of the non-parametric model of a SIDO buck converter at its rated operating point, (ii) determination of the class of the controller, and (iii) converter Open-Loop shaping by convex minimization of the square second norm of the error between the converter Open-Loop Transfer Function and a desired Open-Loop Transfer Function. The proposed controller minimizes the coupling between the outputs of the SIDO buck converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.
