Associate Professor Wanchalerm Pora, Ph.D.
รศ. ดร.วันเฉลิม โปรา
Education
- Ph.D., (Digital Signal Processing), Imperial College University of London, U.K.
- M.Eng. (Electrical Engineering), Chulalongkorn University, Thailand
- B.Eng. (Electrical Engineering), Chulalongkorn University, Thailand
Email: Wanchalerm.p@chula.ac.th
Research Interest
- Smart Devices
- Smart Grid
- Renewable Energy
- EMS
- AI
- Weather Forecast
- Mosquito Species Image Classification
- Dangerous Object Detection in X-ray images
Research Cluster
Link to
1.
Pipattanasomporn, M; Chitalia, G; Songsiri, J; Aswakul, C; Pora, W; Suwankawin, S; Audomvongseree, K; Hoonchareon, N
CU-BEMS, smart building electricity consumption and indoor environmental sensor datasets Journal Article
In: Scientific Data, vol. 7, no. 1, 2020, ISSN: 20524463, (cited By 2).
@article{Pipattanasomporn2020,
title = {CU-BEMS, smart building electricity consumption and indoor environmental sensor datasets},
author = {M Pipattanasomporn and G Chitalia and J Songsiri and C Aswakul and W Pora and S Suwankawin and K Audomvongseree and N Hoonchareon},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85088245691&doi=10.1038%2fs41597-020-00582-3&partnerID=40&md5=f4429e29617970d1a17b92a27f26ec05},
doi = {10.1038/s41597-020-00582-3},
issn = {20524463},
year = {2020},
date = {2020-01-01},
journal = {Scientific Data},
volume = {7},
number = {1},
publisher = {Nature Research},
abstract = {This paper describes the release of the detailed building operation data, including electricity consumption and indoor environmental measurements, of the seven-story 11,700-m2 office building located in Bangkok, Thailand. The electricity consumption data (kW) are that of individual air conditioning units, lighting, and plug loads in each of the 33 zones of the building. The indoor environmental sensor data comprise temperature (°C), relative humidity (%), and ambient light (lux) measurements of the same zones. The entire datasets are available at one-minute intervals for the period of 18 months from July 1, 2018, to December 31, 2019. Such datasets can be used to support a wide range of applications, such as zone-level, floor-level, and building-level load forecasting, indoor thermal model development, validation of building simulation models, development of demand response algorithms by load type, anomaly detection methods, and reinforcement learning algorithms for control of multiple AC units. © 2020, The Author(s).},
note = {cited By 2},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This paper describes the release of the detailed building operation data, including electricity consumption and indoor environmental measurements, of the seven-story 11,700-m2 office building located in Bangkok, Thailand. The electricity consumption data (kW) are that of individual air conditioning units, lighting, and plug loads in each of the 33 zones of the building. The indoor environmental sensor data comprise temperature (°C), relative humidity (%), and ambient light (lux) measurements of the same zones. The entire datasets are available at one-minute intervals for the period of 18 months from July 1, 2018, to December 31, 2019. Such datasets can be used to support a wide range of applications, such as zone-level, floor-level, and building-level load forecasting, indoor thermal model development, validation of building simulation models, development of demand response algorithms by load type, anomaly detection methods, and reinforcement learning algorithms for control of multiple AC units. © 2020, The Author(s).
2.
Suriyavejwongs, P; Leelarasmee, E; Pora, W
A zero bias pixel sensor and its zero-bias column buffer-direct-injection circuit Journal Article
In: Engineering Journal, vol. 21, no. 5, pp. 179-191, 2017, ISSN: 01258281, (cited By 2).
@article{Suriyavejwongs2017a,
title = {A zero bias pixel sensor and its zero-bias column buffer-direct-injection circuit},
author = {P Suriyavejwongs and E Leelarasmee and W Pora},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032001883&doi=10.4186%2fej.2017.21.5.179&partnerID=40&md5=89874e2668d36ed99084d13d6a907b45},
doi = {10.4186/ej.2017.21.5.179},
issn = {01258281},
year = {2017},
date = {2017-01-01},
journal = {Engineering Journal},
volume = {21},
number = {5},
pages = {179-191},
publisher = {Chulalongkorn University 1},
abstract = {Two pixel sensors, namely active pixel sensor (APS) and pseudo-active pixel sensor (PAPS), are reviewed to show that APS suffers from dark current while PAPS suffers from leakage current. Then a new pixel sensor called zero bias pixel sensor (ZBPS) in which only two MOS switches in addition to the photodiode are used, one for connecting the pixel’s photodiode to a column bus and the other for bypassing it. A zero-bias column buffer-direct-injection (ZCBDI) circuit, which is similar to a regulated cascode amplifier, is used to control the voltage at column bus at zero. All ZBPS pixels are guaranteed to work at zero voltage at all times to eliminate the dark current as well as leakage current. A case of a 10µm x 10µm ZBPS pixel designed with standard 0.1µm CMOS process is studied through simulation. This pixel generates a photocurrent within a range from 1pA to 100nA. To handle a large variation of photocurrent while maintaining zero column voltage, the ZCBDI is designed using differential cascode, common source, and buffer stages and then compensated for 50 degree phase margin. Transient simulation shows that the pixel steady state response time is around 1.406ms, leading to at most 5.5 frames per second for an image of 128x128 ZBPS pixels. The fill factor of ZBPS for this case is around 59%. © 2017, Chulalongkorn University 1. All rights reserved.},
note = {cited By 2},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Two pixel sensors, namely active pixel sensor (APS) and pseudo-active pixel sensor (PAPS), are reviewed to show that APS suffers from dark current while PAPS suffers from leakage current. Then a new pixel sensor called zero bias pixel sensor (ZBPS) in which only two MOS switches in addition to the photodiode are used, one for connecting the pixel’s photodiode to a column bus and the other for bypassing it. A zero-bias column buffer-direct-injection (ZCBDI) circuit, which is similar to a regulated cascode amplifier, is used to control the voltage at column bus at zero. All ZBPS pixels are guaranteed to work at zero voltage at all times to eliminate the dark current as well as leakage current. A case of a 10µm x 10µm ZBPS pixel designed with standard 0.1µm CMOS process is studied through simulation. This pixel generates a photocurrent within a range from 1pA to 100nA. To handle a large variation of photocurrent while maintaining zero column voltage, the ZCBDI is designed using differential cascode, common source, and buffer stages and then compensated for 50 degree phase margin. Transient simulation shows that the pixel steady state response time is around 1.406ms, leading to at most 5.5 frames per second for an image of 128x128 ZBPS pixels. The fill factor of ZBPS for this case is around 59%. © 2017, Chulalongkorn University 1. All rights reserved.
3.
Tong, N T; Pora, W
A parameter extraction technique exploiting intrinsic properties of solar cells Journal Article
In: Applied Energy, vol. 176, pp. 104-115, 2016, ISSN: 03062619, (cited By 84).
@article{Tong2016a,
title = {A parameter extraction technique exploiting intrinsic properties of solar cells},
author = {N T Tong and W Pora},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84967105687&doi=10.1016%2fj.apenergy.2016.05.064&partnerID=40&md5=7203743771dd14729667d9cb99cbf48e},
doi = {10.1016/j.apenergy.2016.05.064},
issn = {03062619},
year = {2016},
date = {2016-01-01},
journal = {Applied Energy},
volume = {176},
pages = {104-115},
publisher = {Elsevier Ltd},
abstract = {This paper presents a parameter extraction technique for the five-parameter solar-cell model. It only requires the priori knowledge of three load points: the open circuit, the short circuit, and the maximum power points. An intrinsic property of solar cells helps to construct an extra equation. A cost function is formulated with another intrinsic property. A search algorithm for minimizing the cost function is proposed. The best set of parameters is revealed at the end of searching. Two load scanning experiments are performed on two different solar panels. The simulated I-V curves, produced with the obtained parameters, match the empirical measured results nicely. When compared to other existing techniques, our proposed method usually yields less mean absolute error. © 2016 The Authors.},
note = {cited By 84},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This paper presents a parameter extraction technique for the five-parameter solar-cell model. It only requires the priori knowledge of three load points: the open circuit, the short circuit, and the maximum power points. An intrinsic property of solar cells helps to construct an extra equation. A cost function is formulated with another intrinsic property. A search algorithm for minimizing the cost function is proposed. The best set of parameters is revealed at the end of searching. Two load scanning experiments are performed on two different solar panels. The simulated I-V curves, produced with the obtained parameters, match the empirical measured results nicely. When compared to other existing techniques, our proposed method usually yields less mean absolute error. © 2016 The Authors.
4.
Sirinamaratana, P; Leelarasmee, E; Pora, W
A series DC power line communication and its application to monitoring photo-voltaic strings Journal Article
In: Journal of Circuits, Systems and Computers, vol. 22, no. 9, 2013, ISSN: 02181266, (cited By 7).
@article{Sirinamaratana2013,
title = {A series DC power line communication and its application to monitoring photo-voltaic strings},
author = {P Sirinamaratana and E Leelarasmee and W Pora},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887636911&doi=10.1142%2fS0218126613400100&partnerID=40&md5=5fc467a03cb523dadfc2296b5eeb4f62},
doi = {10.1142/S0218126613400100},
issn = {02181266},
year = {2013},
date = {2013-01-01},
journal = {Journal of Circuits, Systems and Computers},
volume = {22},
number = {9},
abstract = {A communication circuit for transmitting and receiving signal through a series connection of photo-voltaic (PV) panels is proposed. It consists of a transformer connected in series with each panel to couple current signal in and out of the DC power line. This allows data transmission through the panels without using any additional wires or radio frequency link. A practical case of eight 40 W amorphous PV panels is used to demonstrate the design process. It is found that the optimum carrier frequency is 250 kHz at which the panel output impedance is around 5 Ohms, allowing the current signal to pass through with low energy lost. Coupling circuit consists of inductors and capacitors designed to give highest transmission at the carrier frequency. Simulation to verify the circuit performance using a non-ideal model of a toroidal transformer is carried out to prove the feasibility of the concept. © 2013 World Scientific Publishing Company.},
note = {cited By 7},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A communication circuit for transmitting and receiving signal through a series connection of photo-voltaic (PV) panels is proposed. It consists of a transformer connected in series with each panel to couple current signal in and out of the DC power line. This allows data transmission through the panels without using any additional wires or radio frequency link. A practical case of eight 40 W amorphous PV panels is used to demonstrate the design process. It is found that the optimum carrier frequency is 250 kHz at which the panel output impedance is around 5 Ohms, allowing the current signal to pass through with low energy lost. Coupling circuit consists of inductors and capacitors designed to give highest transmission at the carrier frequency. Simulation to verify the circuit performance using a non-ideal model of a toroidal transformer is carried out to prove the feasibility of the concept. © 2013 World Scientific Publishing Company.