Pannil, Pittaya
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Preferred name
Pannil, Pittaya
Alternative Name
Pannil, P.
Main Affiliation
Email
pittaya.pa@kmitl.ac.th
31 results
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Item type:Publication, Digital fieldbus-Analog system integration for revamping projectsThis paper presents a system integration of modern digital fieldbus and traditional analog devices for revamping projects. Using temperature transmitter with Foundation Fieldbus technology and power regulator with 4-20 mA control input for temperature control based on a PID instruction of programmable logic controller (PLC) is examined as an illustrative case study. A portable plant model was designed and implemented for real hands-on training. In addition, basic network and device configurations as well as ladder logic program and graphical user interface creations are discussed. Experimental results of temperature control in the range of 40-60 °C verifying the proposed concept are also included. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Analysis and Comparison of Characteristics for Offline PD Measurements in Turbo-Generators at Different Test Time Intervals(2022-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experience in Partial Discharge Investigation of a 155 MVA Air-Cooled Generator(2024-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Posicast PID × (n-2) Stage PD Cascade Controllers for Magnetically-Levitation System(2017-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The Study of Polarization and Depolarization Current Measurements on Service-Aged 22 kV XLPE Underground Cables with Presence of Water Trees(2022-01-01); ; This paper represents the condition assessment of service-aged 22 kV XLPE insulated underground cables. From the investigation, the water trees were detected in the insulation layer. The visual inspection of underground cables reveals the presence of copper carbonate contaminated on the copper tape layer. Some underground cables have the discontinuity of the copper tape layer. To evaluate the insulation condition of the underground cables, the polarization and depolarization current (PDC) measurements were performed on both the service-aged and the new (or unused) cables. The underground cables to experiment with the length of insulation screen equal to 1 m were prepared. In this research, the PDC measurements were performed on different aspects, i.e., the testing voltages (600 V, 800 V, and 1000 V), the testing positions, the effect of the discontinuity of the copper tape layer which occurred during service, the influence of the presence of copper carbonate, and the influence of water trees in XLPE cables. The dielectric response of the underground cables by using polarization and depolarization current measurements can diagnose the problems in service-aged underground cables, but this paper needs more test data for accurate interpretation. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Discrete PID×(n - 2) stage PD cascade controller for SISO systems(2008-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Rapping Frequency and Intensity in Electrostatic Precipitator Efficiency(2023-01-01); ; Electrostatic precipitator (ESP) is one of air pollution control equipment which widely use in biomass power plant. There is a rapping system in ESP use for removing ash from collecting plate (CP) and discharge electrode (DE). Rapping frequency and intensity of rappers effect the efficiency of ESP because they relate to dust quantity in ESP. Dust layer at CP, which has $108\ \Omega\mathrm{m}$ of resistivity, can cause back corona. Back corona can cause spark in dust layer. To prevent back corona, ESP should operate at lower voltage. Therefore, ESP efficiency is also lower. A chance of ash accumulation is depended on ion charged in dust particle. Rapping cause re-entrainment of dust particle which is uncharged. Re-entrainment dust particle increase uncharged dust in charging area. Therefore, charging process require more ion to charge more dust particle but generating more ion can cause spark over in ESP. There is the appropriate rapping frequency and intensity of rapping due to ESP condition. To study the effect of rapping system in ESP, the experiment was set in 9 cases. The rapping system in the experiment was set as different round trip time (RTT), which determine the rapping frequency, and lifting distance, which determine the intensity. There are 3 different RTT, 2, 3, and 4 minutes, and 3 lifting distance, 8, 10, and 12 inches. Total suspended particulate (TSP) was measured by EPA Method 5 and analyzed by Isokinetic and Gravimetric method to compare the efficiency of ESP in each case. Changing in rapping frequency and intensity of rapping system affect TSP. In case which lifting distance is 8 and 10 inches, TSP tend to decrease when rapping frequency was decreased, means higher efficiency of ESP. On the other hand, TSP tend to increase when rapping frequency was decreased in case of lifting distance is 12 inches. The lowest TSP was the case with 4 minutes RTT and 8 inches lifting distance. From the experiment, there is an appropriate value of rapping frequency and intensity of rapping system. Setting rapping system improve ESP efficiency. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, AC Breakdown Characteristics of Different Moisture Content Pressboards Impregnated with Natural Ester(2021-04-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The Experiment of Partial Discharge for Cast Resin Transformer(2024-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Online PD Measurement by Detecting the Pulsed Compensating Current in High Voltage Equipment(2022-01-01);