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Sukumar Mishra - One of the best experts on this subject based on the ideXlab platform.

  • design of a nonlinear variable gain fuzzy controller for facts devices
    IEEE Transactions on Control Systems and Technology, 2004
    Co-Authors: P K Dash, Stella Morris, Sukumar Mishra
    Abstract:

    The paper presents the design of a nonlinear variable-gain fuzzy controller for a flexible ac transmission systems (FACTS) device like the unified power flow controller (UPFC) to enhance the transient stability performance of power systems. The fuzzy controller uses a numerical Consequent Rule base of the Takagi-Sugeno type, which can be either linear- or nonlinear-producing control-gain variation over a very wide range. This type of fuzzy control is expected to be more robust and effective in damping electromechanical oscillations of the power systems in comparison with the conventional PI regulators used for UPFC control. Computer simulation results validate the superior performance of this controller.

  • Damping of multimodal power system oscillations by FACTS devices using non-linear Takagi-Sugeno fuzzy controller
    International Journal of Electrical Power & Energy Systems, 2003
    Co-Authors: P K Dash, Sukumar Mishra
    Abstract:

    The paper presents a non-linear Takagi-Sugeno fuzzy controller for flexible AC transmission system (FACTS) devices in a multi-machine power system. This controller uses a numerical Consequent Rule base, which can be either linear or non-linear producing control gain variations over a very wide range. This controller is expected to be more robust and effective in damping electromechanical oscillations of the power system compared to the conventional PI controller. Digital simulations of a multi-machine power system, with series connected FACTS devices like UPFC, TCSC and TCPST, etc. subjected to a wide variety of transient disturbances validate the efficiency of the new approach in damping multimodal oscillations.

P K Dash - One of the best experts on this subject based on the ideXlab platform.

  • design of a nonlinear variable gain fuzzy controller for facts devices
    IEEE Transactions on Control Systems and Technology, 2004
    Co-Authors: P K Dash, Stella Morris, Sukumar Mishra
    Abstract:

    The paper presents the design of a nonlinear variable-gain fuzzy controller for a flexible ac transmission systems (FACTS) device like the unified power flow controller (UPFC) to enhance the transient stability performance of power systems. The fuzzy controller uses a numerical Consequent Rule base of the Takagi-Sugeno type, which can be either linear- or nonlinear-producing control-gain variation over a very wide range. This type of fuzzy control is expected to be more robust and effective in damping electromechanical oscillations of the power systems in comparison with the conventional PI regulators used for UPFC control. Computer simulation results validate the superior performance of this controller.

  • Damping of multimodal power system oscillations by FACTS devices using non-linear Takagi-Sugeno fuzzy controller
    International Journal of Electrical Power & Energy Systems, 2003
    Co-Authors: P K Dash, Sukumar Mishra
    Abstract:

    The paper presents a non-linear Takagi-Sugeno fuzzy controller for flexible AC transmission system (FACTS) devices in a multi-machine power system. This controller uses a numerical Consequent Rule base, which can be either linear or non-linear producing control gain variations over a very wide range. This controller is expected to be more robust and effective in damping electromechanical oscillations of the power system compared to the conventional PI controller. Digital simulations of a multi-machine power system, with series connected FACTS devices like UPFC, TCSC and TCPST, etc. subjected to a wide variety of transient disturbances validate the efficiency of the new approach in damping multimodal oscillations.

Stella Morris - One of the best experts on this subject based on the ideXlab platform.

  • design of a nonlinear variable gain fuzzy controller for facts devices
    IEEE Transactions on Control Systems and Technology, 2004
    Co-Authors: P K Dash, Stella Morris, Sukumar Mishra
    Abstract:

    The paper presents the design of a nonlinear variable-gain fuzzy controller for a flexible ac transmission systems (FACTS) device like the unified power flow controller (UPFC) to enhance the transient stability performance of power systems. The fuzzy controller uses a numerical Consequent Rule base of the Takagi-Sugeno type, which can be either linear- or nonlinear-producing control-gain variation over a very wide range. This type of fuzzy control is expected to be more robust and effective in damping electromechanical oscillations of the power systems in comparison with the conventional PI regulators used for UPFC control. Computer simulation results validate the superior performance of this controller.

Venkata Ratnam Kolluru - One of the best experts on this subject based on the ideXlab platform.

  • Variable nonlinear gain fuzzy with improved synchronous reference frame control strategy for performance enhancement of unified power quality conditioner
    Ain Shams Engineering Journal, 2020
    Co-Authors: Rajesh Kumar Patjoshi, Rakhee Panigrahi, Venkata Ratnam Kolluru
    Abstract:

    Abstract This paper proposes a variable nonlinear gain fuzzy (VNGF) controller and negative-feedback based phase-locked loop (NFPLL) with improved synchronous reference frame (ISRF) control strategy for unified power quality conditioner (UPQC). Several power quality (PQ) problems present in the power distribution network can be exterminated through the proposed VNGF-NFPLL-ISRF control method. The VNGF method employs Takagi-Sugeno Fuzzy (TSF) type numerical Consequent Rule with a nonlinear alteration of variable control gain for controlling dc-bus capacitor voltage of UPQC, which limits the voltage deviances through the power system perturbations and delivers quick settling time for dc-bus voltage. The scheme of NFPLL based synchronization is built upon presenting a negative-feedback control action in the interior loop of conventional PLL and hence a greater extent of protection to grid as well as load disturbances, unresponsive to noise, harmonics and additional contaminations existing through the signal can be attained. Moreover, the novelty of ISRF control method relies upon nonintervention with low pass filter (LPF) and high pass filter (HPF). As a consequence, the proposed VNGF-NFPLL-ISRF control technique quickly and accurately extracts the reference signal during power system perturbations. The effectiveness of the proposed approach is experimentally validated and a comparative survey has been accomplished with conventional TSF controller based SRF method (TSF-SRF).

Rajesh Kumar Patjoshi - One of the best experts on this subject based on the ideXlab platform.

  • Variable nonlinear gain fuzzy with improved synchronous reference frame control strategy for performance enhancement of unified power quality conditioner
    Ain Shams Engineering Journal, 2020
    Co-Authors: Rajesh Kumar Patjoshi, Rakhee Panigrahi, Venkata Ratnam Kolluru
    Abstract:

    Abstract This paper proposes a variable nonlinear gain fuzzy (VNGF) controller and negative-feedback based phase-locked loop (NFPLL) with improved synchronous reference frame (ISRF) control strategy for unified power quality conditioner (UPQC). Several power quality (PQ) problems present in the power distribution network can be exterminated through the proposed VNGF-NFPLL-ISRF control method. The VNGF method employs Takagi-Sugeno Fuzzy (TSF) type numerical Consequent Rule with a nonlinear alteration of variable control gain for controlling dc-bus capacitor voltage of UPQC, which limits the voltage deviances through the power system perturbations and delivers quick settling time for dc-bus voltage. The scheme of NFPLL based synchronization is built upon presenting a negative-feedback control action in the interior loop of conventional PLL and hence a greater extent of protection to grid as well as load disturbances, unresponsive to noise, harmonics and additional contaminations existing through the signal can be attained. Moreover, the novelty of ISRF control method relies upon nonintervention with low pass filter (LPF) and high pass filter (HPF). As a consequence, the proposed VNGF-NFPLL-ISRF control technique quickly and accurately extracts the reference signal during power system perturbations. The effectiveness of the proposed approach is experimentally validated and a comparative survey has been accomplished with conventional TSF controller based SRF method (TSF-SRF).