Pairindra, Worapong
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Preferred name
Pairindra, Worapong
Main Affiliation
Email
worapong.pa@kmitl.ac.th
9 results
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Item type:Publication, Development of a Cascaded Half-bridge Converter with Contactless Transformer in DC Microgrid(2016-01-01); A high efficiency cascaded half-bridge converter for contactless transformer with 1 A, 5 V and 600 kHz for mobile phone charger application is implemented in this paper by using simple PI discrete algorithm controller. The proposed target is to achieve the arch free, controllable voltage and galvanic isolation outlet and plug power transforming converter in a dc low voltage household power distribution. For the optimized outcome, the parameters are calculated and verified by MATLAB/Simulink program for bench testing. Additionally, this paper will be presented in both of the simulation and implementation results. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Active power control technique of a BESS and crate parameter consideration for AC microgrid applications(2019-03-01); ; Manee-In, ChaitouchThis paper presents the active power control of a BESS to reduce the PV power fluctuation problem by using the ramp rate control technique, including the C-rate parameter for the AC microgrid system applications, by simulating and designing the battery management system (BMS). The suitable power of BESS power rating can be estimated from the power ramp rate (PRR) of the PV power generation system. Based on the simulated results, it is found that high electrical discharge caused the temperature inside the battery to rise higher than that of low-voltage discharge, and with the simulation results from Real Battery Management System Program, the software can control the charging and discharging of BESS's active power and display real-time results via the display screen. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The plug and outlet for home appliances in DC low voltage micro-grid system(2017-11-03); This proposed paper introduces the more effectiveness of power transferring in dc micro-grid power distribution in order to comprehend the usage of home appliances. A 300V 5-level diode clamped multilevel is operated as power source for contactless power transfer with a selective harmonic elimination(SHE) technique, and the output is set at 48 V 300W with the efficiency at 92.6%. The converter generates 200 kHz switching frequency to send a highly magnetic coupling through primary coil over ferromagnetic material in tight coupling condition. The paper aims are to eliminate the electric shock, galvanic isolation and arch free in dc to dc power conversion. Additionally, the lower %THD can reduce designed parameters which mean the power density will be increased. The output will be illustrated in both simulation and implementation results. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The optimization of series resonant LLC half-bridge converter with coreless transformer design in a low voltage DC distribution system(2015-08-17); This paper will present the optimization design for medium size converter with high switching frequency for household appliances. The series resonant LLC half-bridge converter, 1 kW, 48V and 600 kHz with coreless transformer has been chosen for the power transferring. System verification has been done by MATLAB/Simulink program, which used to find the optimized parameters and converter output under designed conditions. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The implementation of SHE control technique for the SST with CHB seven-level waveform on the solar farm applications(2019-03-01); ; This proposed paper presents the use of selective harmonic elimination (SHE) technology to control the cascaded H-Bridge Multi-level Inverter (CHBMI) for power transferring over the high frequency transformer (HFT), which is a part of the SST for applying to a solar farm. Apparently, the converter is using the seven-level CHBMI and the SHE technique to get rid of the 5<sup>th</sup> harmonic and 7<sup>th</sup> harmonic to find a set of angles θ<inf>1</inf>, θ<inf>2</inf> and 63 with the lowest 3<sup>rd</sup> harmonic. The calculated angles are used in each modules. Obviously, the simulation has shown that, at m<inf>a</inf>=2.43, θ<inf>1</inf>=11.6782°, θ<inf>2</inf>=26.8870° and θ<inf>3</inf>=56.0271°. The total harmonic distortion (% THDv) will be lowest at 9.35%. According to the experimentation, the SHE technique with low % THDv can reduce the power loss at HFT compared to the square wave transmission technique which the % THDv is high. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Deteriorated solar panel detection technique of SST for a solar farm application(2019-03-01); ; This proposed paper introduces the fault detection method for solar cell with Box Plot technique on the Solid State Transformer (SST) for the solar farm application. The Box Plot technique with inclusive quartile value is functioned for finding the upper and lower limit for data analysis. Normally, the fault detections of solar panels are found by using the PV string current from the SST to calculate the upper and lower limit of the Box Plot. If one of the string currents is in the specific outer boundary, therefore, the solar panels are in non-operational condition mode. Generally, the fault detection testing for the solar panels can be categorized in 5 cases: normal condition, open circuit condition, line-line condition, partial shading condition and degradation condition. Finally, based on the simulation result and the actual results, the Box Plot is able to monitor the performance of the PV string according to various conditions as efficiently as possible and accurate. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Plug and Outlet in Household DC Low Voltage Micro-grid Power Distribution(2018-10-22); The main idea of using a dc to dc plug and outlet with high efficiency for household appliances is proposed in this paper. A five-level, 300-W, 200-kHz diode-clamped multilevel technique with selective harmonic elimination is utilized as a power source with input from a 300-V DC link bus and output controlled at 48V. A contactless transformer with an air core and a ferromagnetic material core was chosen in this study for testing and evaluation. Electric shock elimination, galvanic isolation, and arc-free operation can be achieved with this scheme. Additionally, the design's low total harmonic distortion can reduce the size of the inductive power transformer core and increase the power density of the system. Moreover, an LLC series resonance technique with fundamental harmonic approximation (FHA) was designed and added to the rear side of the power converter to achieve the zero voltage switching condition. Finally, the outcome is illustrated by both MATLAB/Simulink and experimental results. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An optimization design of the diode clamped multi-level converter for coaxial inductive power transfer on the low voltage DC micro-grid(2018-01-01); This proposed paper aims for the high efficiency contactless power transfer in household dc power distribution. A 300 W five-level diode clamped multi-level converter with 300 Vdc input dc link bus is employed for the power transferring task and the output voltage range is controlled at 48 Vdc. The inner and outer solenoid coils are used for inductive power transfer (IPT) transformer with the 200 kHz switching frequency for designed power density. Therefore, to achieve the converter efficiency above 95%, the LLC series resonant with fundamental harmonic analysis (FHA) and the calculated switching angles are used as an optimized tool for designing the system resonant tank. The validations of this approached topology are illustrated in both MATLAB/Simulink simulation and implementation. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The enhancement of multilevel converter for coaxial inductive power transfer in low voltage DC power distribution(2016-09-06); The contactless power transfer of dc plug and outlet is proposed in this paper for domestic home appliances dc power system. The medium size dc to dc converter is chosen for transferring 300 V input voltage and generated a 5-level with 600 kHz output voltage by using diode clamped multilevel converter. The output power is set at 300W 48V and the solenoid transformer is functioned as an inductive power transfer (IPT) system. The aims of this proposed paper are to achieved the low switching loss in switching devices, the arch free, the risk of the electric shock and galvanic isolation of the low voltage dc power distribution system. Moreover, the advantages of using the multilevel converter with high switching frequency for high power density design and low THD are illustrated in the MATLAB/Simulink simulation results.