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Subject: search.filters.subject.Controller design

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    Closed-form formulas for continuous/discrete-time pidaj controller's parameters
    (2019-07-01)
    Ukakimaparn, Prapart
    ;
    Tirasesth, Kitti
    ;
    Trisuwannawat, Thanit
    ;
    Pannil, Pittaya
    This paper focuses on establishing the closed-form formulas to design a proportional-integral-derivative-acceleration-jerk (PIDAJ) controller for fourth-order pla- nts. After plant modeling, the analog PIDAJ controller in continuous-time domain can be designed by utilizing the proposed formulas in a vector-matrix form. Based on bilinear transform, the digital PIDAJ controller in discrete-time domain can then be achieved. The use of the proposed formulas to determine the PIDAJ controller's parameters for controlling the air-fuel ratio of an engine is described as an application example to con- _rm their feasibility. MATLAB simulation results con_rm the consistency between step responses of the example system controlled by the designed controllers in continuous-time domain and discrete-time domain.
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    A practical controller design of distributed energy resources for stabilization of interconnected power system based on synchronized phasor measurements
    (2009-12-01)
    Dechanupaprittha, S.
    ;
    Watanabe, M.
    ;
    Mitani, Y.
    ;
    Hongesombut, K.
    ;
    Ngamroo, I.
    With today's advanced technologies, various types of distributed energy resources (DERs) with relatively fast controllability option have been brought into practical applications. This paper presents a metaheuristic-based controller design of controllable DER for stability enhancement based on synchronized phasor measurements. With the most recent data, a simplified oscillation model (SOM) is evaluated and referred to as an estimated power system model for detection and assessment of an estimated inter-area oscillation mode. Subsequently, an extended SOM is formulated by including dynamic effects of DER control system. The designed controller can be achieved via a metaheuristic method with less effort towards the design specification. Moreover, performance of the designed controller can be evaluated during design to avoid its adverse effects. Some simulation results demonstrate and confirm the applicability and effectiveness of the proposed controller design method. ©2009 IEEE.
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    Design of SMES controller for improving stabilization of interconnected power system based on synchronized phasor measurement
    (2007-12-01)
    Dechanupaprittha, Sanchai
    ;
    Hongesombut, Komsan
    ;
    Watanabe, Masayuki
    ;
    Mitani, Yasunori
    ;
    Ngamroo, Issarachai
    This paper presents the design of superconducting magnetic energy storage (SMES) controller for improving stabilization of interconnected power system based on synchronized phasor measurement. Load variations with abrupt changes occurring in a power system cause fluctuations of tie-line power flow and significantly disturb the effective use of transmission lines. As one of promising energy storage devices, SMES is applied for power system stabilization. SMES controller is designed based on the wide area synchronized phasor measurement. The estimated model is determined as a coupled vibration model for detection and assessment of an approximated inter-area oscillation mode. Finally, some simulation studies are carried out to demonstrate the applicability and effectiveness of the design method. ©2007 IEEE.
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    Practical design of smes controller for improving power system stability based on wide area synchronized phasor measurement
    (2007-12-01)
    Dechanupaprittha, Sanchai
    ;
    Hongesombut, Komsan
    ;
    Watanabe, Masayuki
    ;
    Mitani, Yasunori
    ;
    Ngamroo, Issarachai
    This paper proposes a practical design of superconducting magnetic energy storage (SMES) controller for improving power system stability based on synchronized phasor measurement. In interconnected power system, load variations with abrupt changes cause fluctuations of tie-line power flow and significantly affect its stability. As a promising energy storage device, SMES is utilized as a channel for improving power system stability. In particular, SMES controller is designed by taking advantages of the wide area synchronized phasor measurement. Moreover, a tabusearch algorithm is employed for optimally tuning controller parameters. The estimated model is determined as an extended coupled vibration model for detection and assessment of an approximated interarea oscillation mode. Finally, simulation study is carried out to examine and demonstrate the effectiveness of the proposed design method.