Kunakorn, Anantawat
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Kunakorn, Anantawat
Alternative Name
Kunakorn, A.
Kunakorn, Anatawat
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Email
anantawat.ku@kmitl.ac.th
28 results
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Item type:Publication, Computer aided-program for validation of measuring system from unit step response by time convolution method(2005-01-01); ; ; Phoomvuthisarn, S.This paper presents the design and development of the computer algorithm based on LabVIEW for verification of a high voltage measuring system. The algorithm consists of two parts. The first part is a program for calculating the parameters of unit step responses which are verified an ability of the measuring system by a comparison with the values given in IEC 60060-2. The second part is a program for calculating the output voltage waveform by time convolutions between standard testing waveforms and unit step responses. The standard waveforms under investigation are full lightning impulse voltage waveforms, tail-chopped lightning impulse voltage waveforms, front-chopped lightning impulse voltage waveforms and steep-front voltage waveforms according to IEC standards 60060-2 and 61211. This paper considers two different types of the measuring systems, with a resistive voltage divider and a damped capacitive voltage divider for testings. The results show that the algorithm proposed in this paper is practicable, and should be a useful tool for impulse voltage measurements in a standard high voltage laboratory. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Implementation of fuzzy logic controller with bifurcation control of a current-mode boost converter(2007-12-01); This paper presents the design of a basic fuzzy logic controller for switching current-mode DC/DC boost converters. The proposed simple fuzzy logic controllers used only nine rules to regulate output voltage. Moreover, they provide an optimal slope compensation to keep the system adequately remote from the first bifurcation point by mean of stabilizing around the reference signal. In spite of nonlinear characteristics and instabilities of the converter, the performance of the closed-loop control system can be considerably improved to avoid bifurcation phenomena. The experimental results found that these technique introduced in this paper give satisfactory results with the regulating and tracking modes under changes in operating conditions. © 2007 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Estimation of short circuit current due to a group of induction motors using an aggregation model(2004-12-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A cable terminator for partial discharge and dielectric loss measurements(2001-12-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Robust pitch controller design in hybrid wind-diesel power generation system(2008-09-23); ; ; Hashiguchi, T.In this paper, the robust control design of pitch controller for frequency control in a hybrid wind-diesel power generation system is proposed. The structure of the pitch controller is a 1<sup>st</sup>-order lead-lag compensator. To take system uncertainties into account, the coprime factorization is applied in system modeling. To obtain the controller parameters, the performance and stability conditions of H<inf>∞</inf> loop shaping technique are used to formulate the optimization problem. The genetic algorithm is employed to solve the problem. Simulation studies show the frequency control effect and robustness of the proposed controller against system uncertainties in comparison with a variable structure pitch control. ©2008 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Grid-connected photovoltaic system with maximum power point tracking using self-organizing fuzzy logic controller(2005-12-01); This paper presents the design of a controller for the maximum power point tracking of a grid-connected photovoltaic energy conversion system. A boost converter is used in the system to deliver the output from the solar array to DC-AC inverter, and feed the power into the AC grid. A self-organizing fuzzy logic controller is introduced for the tracking algorithm. The duty ratio for the operation of the boost converter is optimally adjusted in such a way that the maximum power point, which normally varies according to the environment, can be achieved. We demonstrate via the simulation results that our proposed technique outperforms over the conventional fuzzy logic controller in terms of tracking speed and transient response. Furthermore, the algorithm implementation can be done using a look-up table, hence a high-performance, cost-effective real-time maximum power point tracking can be simply realized. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Control of bifurcation by fuzzy logic controller for current-mode boost converters(2007-12-01); This paper presents the design of a fuzzy logic controller for switching current-mode DC/DC boost converters. The proposed simple fuzzy logic controller, with nine rules, provides an optimal slope compensation to keep the system adequately remote from the first bifurcation point by means of reducing the current spectrum peak. In spite of nonlinear characteristics and instabilities of the converter, the performance of the closed-loop control system can be considerably improved to avoid bifurcation phenomena. It is found that the technique introduced in this paper gives satisfactory results with the regulating and tracking modes under changes in operating conditions. © 2006 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Analysis of power system event using synchronized PMUs in Thailand power network(2007-12-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A solar-powered battery charger with neural network maximum power point tracking implemented on a low-cost PIC-microcontroller(2005-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, H∞ loop shaping-based robust control design of PSS and TCSC for dynamic stability enhancement(2008-10-06); ; ; Hashiguchi, T.In this paper, the robust control design of power system stabilizer (PSS) and thyristor controlled series capacitor (TCSC) for enhancement of power system dynamic stability is proposed. To take system uncertainties such as variations of system parameters, several loading conditions etc., into account, the normalized coprime factorization is used to represent unstructured uncertainties in the system. The H∞ loop shaping technique is applied to design robust PSS and TCSC controllers. Simulation results in a single machine infinite bus system show that the performance and robustness of the proposed H∞ controllers of PSS and TCSC are superior to those of the conventional PSS and TCSC. © 2008 IEEE.