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This paper proposes a control circuit for Light Emitting Diode (LED) luminaire based on the amount of daylight. This system uses both natural daylight and artificial light from a luminaire to reach the desired illuminance on a working plane. The control circuit operates by receiving an illuminance value from a light sensor and comparing it with a set value in the microcontroller before limiting the light intensity of LED by sending a control Pulse Width Modulation (PWM) signal to the LED driver. In the experimental setup, the controller and a physical model of a working space were built in order to field test the LED daylight control circuit. Electrical characteristics such as voltage, current, and power were measured with a power meter. Illumination characteristics in terms of illuminance on a working plane were determined using a lux meter. The results from actual field tests revealed that this LED control circuit was able to reduce the power consumption of the lighting system while keeping the illuminance on the working plane at the standard value. Both simulation results and the actual experiment of the control circuit proved that it could be used to improve the energy efficiency of both newly installed and retrofitted lighting systems.
Sulee Bunjongjit; Santipont Ananwattanaporn; Atthapol Ngaopitakkul; Chaiyan Jettanasen; Theerasak Patcharoen. Design and Application of Daylight-Based Lighting Controller on LED Luminaire. Applied Sciences 2020, 10, 3415 .
AMA StyleSulee Bunjongjit, Santipont Ananwattanaporn, Atthapol Ngaopitakkul, Chaiyan Jettanasen, Theerasak Patcharoen. Design and Application of Daylight-Based Lighting Controller on LED Luminaire. Applied Sciences. 2020; 10 (10):3415.
Chicago/Turabian StyleSulee Bunjongjit; Santipont Ananwattanaporn; Atthapol Ngaopitakkul; Chaiyan Jettanasen; Theerasak Patcharoen. 2020. "Design and Application of Daylight-Based Lighting Controller on LED Luminaire." Applied Sciences 10, no. 10: 3415.
This study investigates the use of an alternative energy source in the production of electric energy to meet the increasing energy requirements, encourage the use of clean energy, and thus reduce the effects of global warming. The alternative energy source used is a mechanical energy by piezoelectric material, which can convert mechanical energy into electrical energy, that can convert mechanical energy from pressure forces and vibrations during activities such as walking and traveling into electrical energy. Herein, a pilot device is designed, involving the modification of a bicycle into a stationary exercise bike with a piezoelectric generator, to study energy conversion and storage generated from using the bike. Secondly, the piezoelectric energy harvesting system is used on bicycles as a micro-mobility, light electric utility vehicle with smart operation, providing a novel approach to smart city design. The results show that the energy harvested from the piezoelectric devices can be stored in a 3200 mAh, 5 V battery and power sensors on the bicycle. Moreover, 13.6 mW power can be generated at regular cycling speed, outputting 11.5 V and 1.2 mA. Therefore, the piezoelectric energy harvesting system has sufficient potential for application as a renewable energy source that can be used with low power equipment.
Chaiyan Jettanasen; Panapong Songsukthawan; Atthapol Ngaopitakkul. Development of Micro-Mobility Based on Piezoelectric Energy Harvesting for Smart City Applications. Sustainability 2020, 12, 2933 .
AMA StyleChaiyan Jettanasen, Panapong Songsukthawan, Atthapol Ngaopitakkul. Development of Micro-Mobility Based on Piezoelectric Energy Harvesting for Smart City Applications. Sustainability. 2020; 12 (7):2933.
Chicago/Turabian StyleChaiyan Jettanasen; Panapong Songsukthawan; Atthapol Ngaopitakkul. 2020. "Development of Micro-Mobility Based on Piezoelectric Energy Harvesting for Smart City Applications." Sustainability 12, no. 7: 2933.
This paper presents a comparative study on mother wavelets using a fault type classification algorithm in a power system. The study aims to evaluate the performance of the protection algorithm by implementing different mother wavelets for signal analysis and determines a suitable mother wavelet for power system protection applications. The factors that influence the fault signal, such as the fault location, fault type, and inception angle, have been considered during testing. The algorithm operates by applying the discrete wavelet transform (DWT) to the three-phase current and zero-sequence signal obtained from the experimental setup. The DWT extracts high-frequency components from the signals during both the normal and fault states. The coefficients at scales 1–3 have been decomposed using different mother wavelets, such as Daubechies (db), symlets (sym), biorthogonal (bior), and Coiflets (coif). The results reveal different coefficient values for the different mother wavelets even though the behaviors are similar. The coefficient for any mother wavelet has the same behavior but does not have the same value. Therefore, this finding has shown that the mother wavelet has a significant impact on the accuracy of the fault classification algorithm.
Chaichan Pothisarn; Jittiphong Klomjit; Atthapol Ngaopitakkul; Chaiyan Jettanasen; Dimas Anton Asfani; I Made Yulistya Negara. Comparison of Various Mother Wavelets for Fault Classification in Electrical Systems. Applied Sciences 2020, 10, 1203 .
AMA StyleChaichan Pothisarn, Jittiphong Klomjit, Atthapol Ngaopitakkul, Chaiyan Jettanasen, Dimas Anton Asfani, I Made Yulistya Negara. Comparison of Various Mother Wavelets for Fault Classification in Electrical Systems. Applied Sciences. 2020; 10 (4):1203.
Chicago/Turabian StyleChaichan Pothisarn; Jittiphong Klomjit; Atthapol Ngaopitakkul; Chaiyan Jettanasen; Dimas Anton Asfani; I Made Yulistya Negara. 2020. "Comparison of Various Mother Wavelets for Fault Classification in Electrical Systems." Applied Sciences 10, no. 4: 1203.
Road lighting systems require a significant amount of electric energy. To compensate for the utilized energy, the concept of a nanogrid road lighting system is presented. A solar panel is installed on the top of a lighting pole to generate electric power. In this research, a photovoltaic simulator (PV simulator), which is used to simulate solar behavior such as current, voltage, and power based on temperature and solar irradiance levels, is employed to replace a solar panel. In the nanogrid system, grid-connected and stand-alone micro-inverters are employed to convert the electric power. The inverters comprise switching devices that can generate electromagnetic interference (EMI) when operating, which is harmful to the grid system and the electrical equipment. In general, EMI has been studied and reduced in electrical appliances, which only receive electric power. However, for the nanogrid system, which supplies electricity to the grid system, there is less study on the EMI topic because the usage is still not widespread. In the future, the nanogrid system will be widely used delivering high power directly into the electrical grid system. Therefore, the study and attenuation of EMI in the nanogrid system are very promising. Conducted emission (CE) is one form of EMI that flows through a cable connecting several appliances in the frequency range of 150 kHz to 30 MHz. CE of grid-connected and stand-alone micro-inverters have high levels in the low-frequency range between 150 kHz–5 MHz and then decreases steadily. CE attenuation is important for this inverter in a solar power system. This research studies the effect of CE mitigation on the nanogrid system. The result is compared with the Comité International Spécial des Perturbations Radio (CISPR) 14-1 standard. Finally, the passive EMI filter can reduce CE and meets the CISPR 14-1 standard.
Chaiyan Jettanasen; Atthapol Ngaopitakkul. The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems. Sustainability 2019, 12, 151 .
AMA StyleChaiyan Jettanasen, Atthapol Ngaopitakkul. The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems. Sustainability. 2019; 12 (1):151.
Chicago/Turabian StyleChaiyan Jettanasen; Atthapol Ngaopitakkul. 2019. "The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems." Sustainability 12, no. 1: 151.
A road lighting system is important for drivers and uses a lot of energy. The road lighting system must be installed throughout roads which have a long distance and a large volume, which causes power loss in the power transmission line. The concept of combining a power generation system by using a solar power system and a road lighting system is presented to solve this problem; it is called “a nano-grid road lighting system”. The nano-grid system consists of a grid-connected system and a stand-alone system and both systems use micro-inverters to convert the electric power for LED luminaire loads. Both micro-inverters are comprised of switching devices that cause the conducted emission (CE) in the electrical system. The LED luminaire is a very sensitive load because it is less resistant to the CE. Therefore, this research studies the CE in the nano-grid system in each period according to the working pattern of the device to study the CE characteristics for use in the design of CE attenuation methods in the future. The CE of the stand-alone system which is used at nighttime gives a higher level than the grid-connected system and exceeds the Comité International Spécial des Perturbations Radioélectriques (CISPR) 14-1 standard. The CE of the grid-connected system has a high level in the early frequency ranges, whereas the CE of the stand-alone system has a high level throughout the test frequency range.
Chaiyan Jettanasen; Atthapol Ngaopitakkul. Characteristics and Effects of Conducted Emission from Grid-Connected and Stand-Alone Micro-Inverters in a Nano-Grid Road Lighting System. Sustainability 2019, 11, 5690 .
AMA StyleChaiyan Jettanasen, Atthapol Ngaopitakkul. Characteristics and Effects of Conducted Emission from Grid-Connected and Stand-Alone Micro-Inverters in a Nano-Grid Road Lighting System. Sustainability. 2019; 11 (20):5690.
Chicago/Turabian StyleChaiyan Jettanasen; Atthapol Ngaopitakkul. 2019. "Characteristics and Effects of Conducted Emission from Grid-Connected and Stand-Alone Micro-Inverters in a Nano-Grid Road Lighting System." Sustainability 11, no. 20: 5690.
This paper proposes the study and analysis of harmonics, energy consumption and power quality of light emitting diode (LED) lamps equipped in building lighting systems. LED lamps with external (LED MR16) and internal (LED light bulb) drivers are investigated using an experimental setup to compare the results. The power quality of both LED lamps is studied by using a power quality meter to measure the generated harmonic currents from various case studies. The case study is divided into four major cases: one LED lamp is turned on with one driver, two LED lamps are turned on using the two drivers, eight LED lamps are turned on with one driver, and eight LED lamps are turned on with the eight drivers. As harmonics are related to total power factor (PF), which affects the energy savings of the building, hence, a filtering circuit to reduce harmonic current has been designed and implemented to improve power quality and/or power factor of the system. The different cases of harmonic filter insertion at the input of an LED lamp’s driver are discussed and then compared with a lighting standard to show the effectiveness of the passive filtering technique used in the studied system. In addition, the obtained result can be applied to both newly built and retrofitted buildings that aim to use LED technology to increase energy efficiency and decrease energy costs, and could be a helpful guide for end-users and manufacturers in addressing and developing LED issues.
Natthanon Phannil; Chaiyan Jettanasen; Atthapol Ngaopitakkul. Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps. Energies 2018, 11, 3169 .
AMA StyleNatthanon Phannil, Chaiyan Jettanasen, Atthapol Ngaopitakkul. Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps. Energies. 2018; 11 (11):3169.
Chicago/Turabian StyleNatthanon Phannil; Chaiyan Jettanasen; Atthapol Ngaopitakkul. 2018. "Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps." Energies 11, no. 11: 3169.
In this past few years, installation of distributed generator (DG) has become topic of interest in many countries due to rapid increase in energy and environmental issue. Generating power from renewable source has been proposed to compensate fossil fuel that is currently depleted. Wind power is one of the renewable energy sources that gains a huge attention, and many utilities are connecting wind power to distribution system. This number is going to get higher in the near future. Research on influence of wind power on system must be done in order to ensure the reliability of power system. This paper aims to study an impact of wind power-integrated distribution system when fault occurs in the system for various conditions. Many factors capable of changing system characteristics have been taken into account such as distribution system consisting of multi-wind power generation, size of wind power generation, fault type, and location of fault. Distribution system under this study is modeled based on 22 kv distribution network of Provincial Electricity Authority (PEA) in Thailand. Simulation will be done by using PSCAD/EMTP. Result obtained from case studies will be used to analyze and evaluate the effect of installation of wind power. The result indicates that the DG contributes significant fault current to the system when fault occurs.
Santipont Ananwattanaporn; Atthapol Ngaopitakkul; Chaiyan Jettanasen; Chaichan Pothisarn; Monthon Leelajindakrairerk. Influence of Wind Farm on Distribution System: Current Characteristics During Fault Occurrence. Smart and Sustainable Planning for Cities and Regions 2018, 881 -905.
AMA StyleSantipont Ananwattanaporn, Atthapol Ngaopitakkul, Chaiyan Jettanasen, Chaichan Pothisarn, Monthon Leelajindakrairerk. Influence of Wind Farm on Distribution System: Current Characteristics During Fault Occurrence. Smart and Sustainable Planning for Cities and Regions. 2018; ():881-905.
Chicago/Turabian StyleSantipont Ananwattanaporn; Atthapol Ngaopitakkul; Chaiyan Jettanasen; Chaichan Pothisarn; Monthon Leelajindakrairerk. 2018. "Influence of Wind Farm on Distribution System: Current Characteristics During Fault Occurrence." Smart and Sustainable Planning for Cities and Regions , no. : 881-905.
Suntiti Yoomak; Chaiyan Jettanasen; Atthapol Ngaopitakkul; Sulee Bunjongjit; Monthol Leelajindakrairerk. Comparative study of lighting quality and power quality for LED and HPS luminaires in a roadway lighting system. Energy and Buildings 2018, 159, 542 -557.
AMA StyleSuntiti Yoomak, Chaiyan Jettanasen, Atthapol Ngaopitakkul, Sulee Bunjongjit, Monthol Leelajindakrairerk. Comparative study of lighting quality and power quality for LED and HPS luminaires in a roadway lighting system. Energy and Buildings. 2018; 159 ():542-557.
Chicago/Turabian StyleSuntiti Yoomak; Chaiyan Jettanasen; Atthapol Ngaopitakkul; Sulee Bunjongjit; Monthol Leelajindakrairerk. 2018. "Comparative study of lighting quality and power quality for LED and HPS luminaires in a roadway lighting system." Energy and Buildings 159, no. : 542-557.
The major function of protective devices in a power system is to detect the occurrence of faults and to isolate the faulty sections from the rest of the system. Much progress has been made in the development algorithms for detecting faults in power transformers, which depend on transients‐based techniques. This paper presents an algorithm based on a combination of discrete wavelet transforms and probabilistic neural networks (PNNs) for classifying internal faults in a two‐winding three‐phase transformer. Fault conditions of the transformer are simulated using alternative transients program/electromagnetic transients program (ATP/EMTP) in order to obtain current signals. The mother wavelet Daubechies4 is employed to decompose the high‐frequency components from these signals. All three phases of the differential current signals are used in the fault detection decision algorithm. The variations of first‐scale high‐frequency component that detects fault are used as an input for the training pattern. The training process for the neural network and fault diagnosis decision is implemented using toolboxes on MATLAB/Simulink. Various cases and fault types based on the Thailand electricity transmission and distribution systems are studied to verify the validity of the algorithm. Backpropagation neural network is also compared with the PNN in this paper. It is found that the proposed method gives satisfactory accuracy with less training time, and will be particularly useful in the development of a modern differential relay for a transformer protection scheme. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Chaiyan Jettanasen; Atthapol Ngaopitakkul. A novel probabilistic neural network-based algorithm for classifying internal fault in transformer windings. IEEJ Transactions on Electrical and Electronic Engineering 2013, 8, 123 -131.
AMA StyleChaiyan Jettanasen, Atthapol Ngaopitakkul. A novel probabilistic neural network-based algorithm for classifying internal fault in transformer windings. IEEJ Transactions on Electrical and Electronic Engineering. 2013; 8 (2):123-131.
Chicago/Turabian StyleChaiyan Jettanasen; Atthapol Ngaopitakkul. 2013. "A novel probabilistic neural network-based algorithm for classifying internal fault in transformer windings." IEEJ Transactions on Electrical and Electronic Engineering 8, no. 2: 123-131.
Somyot Kaitwanidvilai; Chaiyan Jettanasen; Atthapol Ngaopitakkul; Anuwat Jangwanitlert. Development of Low Cost Circuit for ESD/Lightning Counter for Industrial Applications. Power and Energy Systems 2012, 1 .
AMA StyleSomyot Kaitwanidvilai, Chaiyan Jettanasen, Atthapol Ngaopitakkul, Anuwat Jangwanitlert. Development of Low Cost Circuit for ESD/Lightning Counter for Industrial Applications. Power and Energy Systems. 2012; ():1.
Chicago/Turabian StyleSomyot Kaitwanidvilai; Chaiyan Jettanasen; Atthapol Ngaopitakkul; Anuwat Jangwanitlert. 2012. "Development of Low Cost Circuit for ESD/Lightning Counter for Industrial Applications." Power and Energy Systems , no. : 1.
This paper proposes a technique for discriminating among inrush current, external fault and internal winding fault of three-phase two-winding transformer which variations of coefficients of high frequency component obtained from DWT of differential current are analyzed.
Chaiyan Jettanasen; Jittiphong Klomjit; Apichart Yodkhuang; Atthapol Ngaopitakkul; Chaichan Pothisarn. Discriminating Among Inrush Current, External Fault and Internal Winding Fault using Coefficient of DWT. Power and Energy Systems 2012, 1 .
AMA StyleChaiyan Jettanasen, Jittiphong Klomjit, Apichart Yodkhuang, Atthapol Ngaopitakkul, Chaichan Pothisarn. Discriminating Among Inrush Current, External Fault and Internal Winding Fault using Coefficient of DWT. Power and Energy Systems. 2012; ():1.
Chicago/Turabian StyleChaiyan Jettanasen; Jittiphong Klomjit; Apichart Yodkhuang; Atthapol Ngaopitakkul; Chaichan Pothisarn. 2012. "Discriminating Among Inrush Current, External Fault and Internal Winding Fault using Coefficient of DWT." Power and Energy Systems , no. : 1.