Kinnares, Vijit

Preferred name

Kinnares, Vijit

Alternative Name

Kinnares, V.

Main Affiliation

School of Engineering

vijit.ki@kmitl.ac.th

Now showing 1 - 10 of 103

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Power Quality Improvement of a Grid Connected Spilt-Phase Induction Generator using Tuned Harmonic Filters and Reactive Power Compensation
(2022-01-01)
Prapurt, Nuttapong
;
Kinnares, Vijit
This paper proposes power quality improvement of a 0.40 kW, 220V, 4.S0A, 4 pole grid connected split-phase induction generator using a capacitor for reactive power compensation in conjunction with the third and fifth tuned harmonic filters for mitigation of grid harmonic currents associated with the capacitor for reactive compensation. The design of the shunt passive filters is given. The obtained results can be guidelines for the design of a suitable induction generator system for efficient wind energy applications.
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Investigation of skew effect on the behavior and performance of grid connected induction generators
(2017-01-30)
Sawetsakulanond, B.
;
Kinnares, V.
This paper proposes the investigation of skew effect on the behavior and performance of three phase, 2.2 kW, 220/380 V, Δ / Y connected, 1420 rpm, 4 poles grid connected induction generators with skewed squirrel cage rotor for supplying electric power to utility grid. Skewed rotor with angle of 0°, 5° and 10° for grid connected induction generators are employed. Analysis and comparative study on operating of induction generators under transient and steady state conditions have been performed. Research results will be guidelines for an application of wind induction generator for electricity generation.
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Five-leg voltage source inverter for driving two single-phase induction motors
(2014-01-01)
Dangeam, Sirichai
;
Kinnares, Vijit
This paper presents the simulation of a five-leg voltage source inverter for driving independently two single-phase induction motors with different speeds. Carrier-based space vector pulse width modulation is used for the five-leg VSI. V/f scalar control is employed for those motors. The simulation results show that the speed for each motor can be independently control. Besides that, the advantages of the five-leg inverter are shared capacitor and dc bus together, reduced cost due to a decrease in power switch count and driver circuits and also switching losses.
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Design and construction of a three phase of self-exited induction generator
(2008-12-01)
Sawetsakulanond, B.
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Hothongkham, P.
;
Kinnares, V.
This paper proposes the design and construction of three phase, 220/380 V, 3.4/2.0 A, δγ connected, 4 poles, 0.75 kW a self-exited induction generator (SEIG). Analysis of the designed SEIG uses a finite element method. The designed SEIG has been tested and compared with a standard SEIG under operating conditions such as no-load and on-load with pure resistive load. Consideration of capacitance for the SEIG based on equivalent circuit model under steady-state load conditions and a power flow diagram is given. Research results can be guidelines for development of effective wind induction generators for electricity generation. ©2008 IEEE.
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Two-phase three-leg voltage source converter fed asymmetrical parameter type two-phase induction machine operating in motoring and generating modes
(2013-01-01)
Sardyoung, Papol
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Leeragreephol, Surachat
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Kinnares, Vijit
This paper presents performance evaluation of an asymmetrical parameter type two-phase induction machine drive using two-phase three-leg voltage source converter (VSC) operating in motoring and generating modes. A system is simulated using MATLAB/SIMULINK. The proposed converter system includes a machine side converter using a three-leg VSC and a front end converter using a single-phase full bridge switched mode converter. The overall converter system is able to operate in a bidirectional power flow mode. For the front end converter, hysteresis band current control is utilized to maintain the DC link voltage constant. The machine side converter provides both unbalanced and balanced twophase output voltages for the machine based on a sinusoidal pulse-width modulation (SPWM) technique. The comparative performance evaluation of the whole system between balanced and unbalanced two-phase motor voltages is given.
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Performance comparison of an asymmetrical parameter type two-phase induction motor supplied with balanced and unbalanced phase voltages
(2010-07-30)
Piyarat, W.
;
Hothongkham, P.
;
Kinnares, V.
This paper presents a performance comparison of an asymmetrical parameter type two-phase induction motor supplied with balabced and unbalanced phase voltages using a three-leg voltage source inverter (VSI). Sinusoidal pulse width modulation(SPWM) method with constant V/F control is used for the two phase three leg inverter. Simulation and experimemtal results are used to evaluate the motor performance. It is found that the unbalanced applied voltage case offers the better motor perfoemance over the balanced applied voltage case in terms of torque ripple, speed holding capability and current trajectories, etc.
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Investigation into harmonic losses in a PWM multilevel cascaded H-bridge inverter fed induction motor
(2007-12-01)
Hothongkham, Prasopchok
;
Kinnares, Vijit
This paper presents harmonic loss considerations in a PWM multilevel cascaded H-bridge inverter fed induction motor. A non-sinusoidal waveform or voltage harmonic has influence on efficiency and performance of a drive system. Harmonic voltages depend upon PWM parameters such as modulation index, switching frequency, PWM schemes, and dc voltage levels etc. The comparison of additional losses between a conventional inverter drive and a multilevel cascaded H-Bridge inverter drive is evaluated through MATLAB/Simulink and experimental results. Harmonic loss evaluation under various PWM strategies such as sinusoidal pulse width modulation (SPWM), third harmonic injection pulse width modulation (THPWM) and space vector pulse width modulation (SVPWM) for multilevel cascaded inverters is given. PWM signals are generated by a dsPIC microprocessor. The harmonic loss calculation is based on frequency dependent loss functions. Moreover experimental results are also given. The results can be guidelines for designing multilevel inverters suitable for induction motor drives. © 2007 IEEE.
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Improvement of slip energy recovery drives with voltage source inverter for a speed control of wound rotor induction motors
(2007-12-01)
Tunyasrirut, Satean
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Ngamwiwit, Jongkol
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Kinnares, Vijit
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Furuya, Tadayoshi
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Yamamoto, Yoshiichi
This paper introduces the improvement of slip energy recovery drives with voltage source inverter for a speed control of wound rotor induction motors in order to reduce harmonics of input line current waveforms and improve its power factor. A boost chopper is used to connect the diode rectifier to DC link voltage, which is composed of a capacitor and voltage source inverter type space vector pulse width modulation (SVPWM). This scheme leads to be able to adjust the speed of the motor by the duty cycle of the chopper. The PI cascade controller is also introduced to control a speed to be constant when the load varies. An overview of the experimental test bench that the results are presented is three-fold. The first is the harmonics of input line current waveforms are reduced, the second power factor of the drive with VSI are improved and the third presented for a design PI controller for control a speed, where step change loading and unloading transients.
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Performance evaluation of single-phase PWM AC chopper fed three-phase induction motor
(2014-01-01)
Phiphitsunthon, Benyathip
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Bumroongphuck, Chavaporn
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Promkhun, Watcharin
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Kinnares, Vijit
This paper presents performance evaluation of a single-phase AC chopper fed three phase induction motor. The existing three-phase induction motor connected in delta can be operated with such single-phase voltage controller by connecting a capacitor across one phase. By varying duty cycle of asynchronous PWM generated from a dsPIC microcontroller for a single-phase AC chopper, terminal motor voltage can be adjusted. Performance evaluation in terms of motor input power factor and efficiency has been performed. In addition, comparison between the proposed technique and both fixed voltage of 1-phase sinusoidal ac source and fixed voltage of conventional three-phase ac source is also given.
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Partial Discharge Phenomena in Power Capacitor Unit Insulation Under Harmonic Resonance Effects
(2020-01-01)
Boonseng, Chongrag
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Boonseng, Rapeepornpat
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Boonsaner, Nutthaphan
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Kinnares, Vijit
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Apiratikul, Promsak
The capacitor in the electrical system for power factor correction is always damaged when under voltage and current waveforms are distorted. There was a test found that the electrical insulation was damaged and destroyed. In order to learn this damage mechanism it requires a non-destructive inspection method. The partial discharge (PD) testing is a method that can detect deterioration and a defect in the electrical insulating material that is not visible. The purpose of this paper is to investigate the impact of harmonic resonance on power capacitor unit insulation. High voltage capacitor units consist of parallel and series connected elements. The rating of element of capacitor units applied in the power system is 6.67 kVAR/Phase, 400 V. Series resonance can lead to high voltage distortion levels at a low voltage side of transformer resulting in high harmonic current in the element of capacitors. The inspection and element of capacitor unit test are used to obtain power system resonance, a standard operating procedure, testing and measurement between phase to ground using the partial discharge model MPD 600 OMICRON, dielectric losses and capacitance model CPC 100 OMICRON. Finally, the scanning electron microscope (SEM) is used. The comparison of results between new element of capacitor and element under harmonic resonance are performed. The results convey that breakdown in insulating of capacitors under harmonic resonance can be used for considering capacitor voltage rating. The failure of insulation an increase in obtained and emphasized by photograph from SEM.

Kinnares, Vijit

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