Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744688
N. F. M. Yasid, N. Azis, M. Yousof, M. Talib, Avinash Srikanta Murthy
This paper presents the calculations and simulation of surge distributions and estimation of axial and radial forces experienced by a disc-type winding due to Switching Impulse (SI). Firstly, the resistance, inductance and capacitance (RLC) of the high voltage (HV) disc winding were computed to construct the winding equivalent circuit. A standard switching impulse wave generated from a switching impulse generator circuit was subjected to the HV winding to obtain the transient resonance affecting the disc windings. The force in axial and radial components was then calculated through the voltage surge distributions in the windings. It is found that the highest switching surge is experienced by the topmost disc winding. An uneven voltage distribution is detected among the topmost disc, disc 96 and disc 93, which results in voltage stress. A conclusion is drawn that the highest force would be exerted on the topmost disc, disc 96.
{"title":"Axial and Radial Force Distributions Computation in Disc-Type Winding Under Switching Surge","authors":"N. F. M. Yasid, N. Azis, M. Yousof, M. Talib, Avinash Srikanta Murthy","doi":"10.1109/ICPEA53519.2022.9744688","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744688","url":null,"abstract":"This paper presents the calculations and simulation of surge distributions and estimation of axial and radial forces experienced by a disc-type winding due to Switching Impulse (SI). Firstly, the resistance, inductance and capacitance (RLC) of the high voltage (HV) disc winding were computed to construct the winding equivalent circuit. A standard switching impulse wave generated from a switching impulse generator circuit was subjected to the HV winding to obtain the transient resonance affecting the disc windings. The force in axial and radial components was then calculated through the voltage surge distributions in the windings. It is found that the highest switching surge is experienced by the topmost disc winding. An uneven voltage distribution is detected among the topmost disc, disc 96 and disc 93, which results in voltage stress. A conclusion is drawn that the highest force would be exerted on the topmost disc, disc 96.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"72 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120819615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744695
Muhammad Adnan, Z. Abdul-Malek, K. Y. Lau, M. Tahir
Polypropylene (PP) which is recyclable and having high working temperature is considered as a potential insulation material for high voltage direct current (HVDC) insulation. The aim of this work is to investigate the effect of rutile phase TiO2 on the dielectric properties of PP nanocomposites. Rutile TiO2 was obtained using sol gel method in the laboratory. X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) was employed to investigate the crystalline and morphological structure of synthesized TiO2. PP nanocomposite were obtained by mixing 0.5 wt%, 1 wt% and 3 wt% rutile TiO2 by using brabender machine. The thermal behavior of PP nanocomposites was characterized through Differential scanning calorimetry (DSC). Meanwhile, the DC breakdown strength tests were executed to study the dielectric properties of PP nanocomposites. The results of breakdown strength revealed that incorporation of rutile TiO2 significantly decreased the breakdown strength of PP for all systems. The mechanism concerning decreased in DC breakdown strength are discussed.
{"title":"Effect of Rutile Phase Titanium Oxide Nanofiller on the Dielectric Properties of Polypropylene Nanocomposites","authors":"Muhammad Adnan, Z. Abdul-Malek, K. Y. Lau, M. Tahir","doi":"10.1109/ICPEA53519.2022.9744695","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744695","url":null,"abstract":"Polypropylene (PP) which is recyclable and having high working temperature is considered as a potential insulation material for high voltage direct current (HVDC) insulation. The aim of this work is to investigate the effect of rutile phase TiO2 on the dielectric properties of PP nanocomposites. Rutile TiO2 was obtained using sol gel method in the laboratory. X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) was employed to investigate the crystalline and morphological structure of synthesized TiO2. PP nanocomposite were obtained by mixing 0.5 wt%, 1 wt% and 3 wt% rutile TiO2 by using brabender machine. The thermal behavior of PP nanocomposites was characterized through Differential scanning calorimetry (DSC). Meanwhile, the DC breakdown strength tests were executed to study the dielectric properties of PP nanocomposites. The results of breakdown strength revealed that incorporation of rutile TiO2 significantly decreased the breakdown strength of PP for all systems. The mechanism concerning decreased in DC breakdown strength are discussed.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130383507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744677
Thealfaqar A. Abdul-Jabbar, A. Kersten, Alireza Mashayekh, A. Obed, Ahmed Jabbar Abid, Manuel Kuder
Battery balancing technologies are a crucial mech anism for the safe operation of electrochemical energy storage systems, such as lithium-ion batteries. Moreover, balancing be tween battery cells is essential for battery systems' life. Without any balancing circuitry, individual cell voltages can reach their maximum/minimum battery voltage limit faster than others, posing safety hazards. Furthermore, battery capacity reduction can occur when overcharging/over-discharging individual cells. So far, many balancing methodologies have been proposed and discussed in available literature. This paper presents a review of different state-of-the-art cell balancing methods suitable for low voltage applications. The required control complexity, switch stress, balancing speed, cost and circuit size are considered as key aspects. Typically, cell bypass techniques, such as passive balancing, have the lowest cost and require no complex control strategies. In contrast, cell-to-cell balancing techniques can significantly increase the energy efficiency compared to cell bypass balancers, but these come with higher system costs and control complexity.
{"title":"Efficient Battery Cell Balancing Methods for Low-Voltage Applications: A Review","authors":"Thealfaqar A. Abdul-Jabbar, A. Kersten, Alireza Mashayekh, A. Obed, Ahmed Jabbar Abid, Manuel Kuder","doi":"10.1109/ICPEA53519.2022.9744677","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744677","url":null,"abstract":"Battery balancing technologies are a crucial mech anism for the safe operation of electrochemical energy storage systems, such as lithium-ion batteries. Moreover, balancing be tween battery cells is essential for battery systems' life. Without any balancing circuitry, individual cell voltages can reach their maximum/minimum battery voltage limit faster than others, posing safety hazards. Furthermore, battery capacity reduction can occur when overcharging/over-discharging individual cells. So far, many balancing methodologies have been proposed and discussed in available literature. This paper presents a review of different state-of-the-art cell balancing methods suitable for low voltage applications. The required control complexity, switch stress, balancing speed, cost and circuit size are considered as key aspects. Typically, cell bypass techniques, such as passive balancing, have the lowest cost and require no complex control strategies. In contrast, cell-to-cell balancing techniques can significantly increase the energy efficiency compared to cell bypass balancers, but these come with higher system costs and control complexity.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127034852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744652
D. R. Thinesh, B. Sivaneasan, K. T. Tan, Purnima Murali Mohan
With the Internet of Things (IoT) being a key enabler for Industry 4.0, newer wireless communication technologies for IoT networks promise to achieve a higher communication range with lower power consumption compared to legacy communication systems like Wi-Fi. In this paper, an IIoT - based solution - CoastaL (Condition monitoring for electrical asset and Localization) - is proposed using Long Range WAN (LoRaWAN) technology and deployed in a shipyard spanning across 206 hectares for condition monitoring and localization of electrical assets. The paper presents a comprehensive comparison study of various Low Power WAN (LPWAN) technologies to determine a suitable technology for the CoastaL system. LoRaWAN is the only LPW AN technology that allows a private network implementation and does not require subscriptions while offering high range and cost efficiency as opposed to Sigfox and NB-IoT. The performance of the CoastaL system is measured as a function of receiver signal strength indicator (RSSI) which is based on the distance from the gateway. Using the collected measurement data, an empirical formula on the RSSI was formulated to estimate the signal strength of LoRaWAN devices at shipyards and similar environments.
{"title":"IIoT based Electrical Asset Management System: A LoRaWan Deployment Study at Shipyard","authors":"D. R. Thinesh, B. Sivaneasan, K. T. Tan, Purnima Murali Mohan","doi":"10.1109/ICPEA53519.2022.9744652","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744652","url":null,"abstract":"With the Internet of Things (IoT) being a key enabler for Industry 4.0, newer wireless communication technologies for IoT networks promise to achieve a higher communication range with lower power consumption compared to legacy communication systems like Wi-Fi. In this paper, an IIoT - based solution - CoastaL (Condition monitoring for electrical asset and Localization) - is proposed using Long Range WAN (LoRaWAN) technology and deployed in a shipyard spanning across 206 hectares for condition monitoring and localization of electrical assets. The paper presents a comprehensive comparison study of various Low Power WAN (LPWAN) technologies to determine a suitable technology for the CoastaL system. LoRaWAN is the only LPW AN technology that allows a private network implementation and does not require subscriptions while offering high range and cost efficiency as opposed to Sigfox and NB-IoT. The performance of the CoastaL system is measured as a function of receiver signal strength indicator (RSSI) which is based on the distance from the gateway. Using the collected measurement data, an empirical formula on the RSSI was formulated to estimate the signal strength of LoRaWAN devices at shipyards and similar environments.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127776406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744694
M. Eidiani, H. Zeynal, Z. Zakaria
Dynamic Available Transfer Capability (DATC) is one of the critical calculations in the electricity market. A combined method for DATC calculation (CDATC) is proposed. The CDATC as a combination of the Newton-Raphson-Seydel (NRS) and the Down-Hill (DH) evolves while overcoming their limitations. The proposed method makes use of Estimate-PEBS (EPEBS) and Estimate-POMP (EPOMP) to find transient stability. Further, online state estimation (ES) is integrated into the model to sound the solution more realistic. Simulation results exhibited that the proposed CDATC can cater to a quality solution represented by fast computational performance and higher accuracy results as compared with FADATC method. Implementation of the developed model on the real-world system of the West-Iran with 848 bus and Iowa State with 145 bus proved its suitability for utilities even in presence of large wind farms. The simulation results further indicated that the CDATC can be used for online applications for large systems.
{"title":"Development of Online Dynamic ATC Calculation Integrating State Estimation","authors":"M. Eidiani, H. Zeynal, Z. Zakaria","doi":"10.1109/ICPEA53519.2022.9744694","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744694","url":null,"abstract":"Dynamic Available Transfer Capability (DATC) is one of the critical calculations in the electricity market. A combined method for DATC calculation (CDATC) is proposed. The CDATC as a combination of the Newton-Raphson-Seydel (NRS) and the Down-Hill (DH) evolves while overcoming their limitations. The proposed method makes use of Estimate-PEBS (EPEBS) and Estimate-POMP (EPOMP) to find transient stability. Further, online state estimation (ES) is integrated into the model to sound the solution more realistic. Simulation results exhibited that the proposed CDATC can cater to a quality solution represented by fast computational performance and higher accuracy results as compared with FADATC method. Implementation of the developed model on the real-world system of the West-Iran with 848 bus and Iowa State with 145 bus proved its suitability for utilities even in presence of large wind farms. The simulation results further indicated that the CDATC can be used for online applications for large systems.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126293979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744683
Mario Norman Syah, E. Firmansyah, Dzuhri Radityo Utomo
A bidirectional dc-dc converter is an important topology for interfacing different voltage levels in both power flow directions. It can be applied to hybrid energy storage systems (HESS), electric vehicles, dc microgrids, and many other applications. The topology can be interleaved in order to gain advantages such as current and voltage ripple reduction and increase power handling capability. The interleaved bidirectional converter has to operate in a specific conduction mode to avoid the losses due to high-frequency switching and reverse recovery diode. There are many interleaved bidirectional converters that have been proposed. This paper tries to review some of those proposed papers from the point of view of conduction mode, control strategy, and their challenges. This review aims to provide a comparative basis for developing new approaches of interleaved bidirectional converters for specific applications.
{"title":"Interleaved Bidirectional DC-DC Converter Operation Strategies and Problem Challenges: An Overview","authors":"Mario Norman Syah, E. Firmansyah, Dzuhri Radityo Utomo","doi":"10.1109/ICPEA53519.2022.9744683","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744683","url":null,"abstract":"A bidirectional dc-dc converter is an important topology for interfacing different voltage levels in both power flow directions. It can be applied to hybrid energy storage systems (HESS), electric vehicles, dc microgrids, and many other applications. The topology can be interleaved in order to gain advantages such as current and voltage ripple reduction and increase power handling capability. The interleaved bidirectional converter has to operate in a specific conduction mode to avoid the losses due to high-frequency switching and reverse recovery diode. There are many interleaved bidirectional converters that have been proposed. This paper tries to review some of those proposed papers from the point of view of conduction mode, control strategy, and their challenges. This review aims to provide a comparative basis for developing new approaches of interleaved bidirectional converters for specific applications.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130914161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744708
M. E. Ya’acob, Shireen Aida Zulkifli, Normaziah Zulkifli, Abdurrahman Noor Iskandar, Mohammad Hafiz Othman, Muhammad Luqman Aqil Zaidi
Developing green jobs in the solar field as well as reducing environmental impacts has been proven to offer major benefits to Malaysian economy and electricity generation sources. The first concept introduced to Malaysia was Small Renewable Energy Power Program (SREP) which then expanded into the latest and largest scheme which is Large Scale Solar 4 (LSS Mentari). This concept encourages the export of Solar Photovoltaic (PV) as the renewable energy generation to national grid at a fixed rate for 21 years contract by independent power provider (IPP). Ministry of Environment and Water Malaysia (KASA) has promoted the rainwater as the source of potable water products to create more opportunities for large scale rainwater catchment concept using the existing LSS infrastructures with some modifications and storage facility. The effort to prevent rainwater from flowing through drainage system would also reduce the risk of stormwater flooding especially in dense urban population. This paper implies Geographical Information System (GIS) mapping for the potential rainwater harvesting (RWH) approach under the LSS scheme by indicating the catchment area and projected rainwater collection for each LSS site in Peninsular Malaysia.
{"title":"GIS Mapping for Rainwater Harvesting in Ground-mounted Large Scale Solar PV Farms","authors":"M. E. Ya’acob, Shireen Aida Zulkifli, Normaziah Zulkifli, Abdurrahman Noor Iskandar, Mohammad Hafiz Othman, Muhammad Luqman Aqil Zaidi","doi":"10.1109/ICPEA53519.2022.9744708","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744708","url":null,"abstract":"Developing green jobs in the solar field as well as reducing environmental impacts has been proven to offer major benefits to Malaysian economy and electricity generation sources. The first concept introduced to Malaysia was Small Renewable Energy Power Program (SREP) which then expanded into the latest and largest scheme which is Large Scale Solar 4 (LSS Mentari). This concept encourages the export of Solar Photovoltaic (PV) as the renewable energy generation to national grid at a fixed rate for 21 years contract by independent power provider (IPP). Ministry of Environment and Water Malaysia (KASA) has promoted the rainwater as the source of potable water products to create more opportunities for large scale rainwater catchment concept using the existing LSS infrastructures with some modifications and storage facility. The effort to prevent rainwater from flowing through drainage system would also reduce the risk of stormwater flooding especially in dense urban population. This paper implies Geographical Information System (GIS) mapping for the potential rainwater harvesting (RWH) approach under the LSS scheme by indicating the catchment area and projected rainwater collection for each LSS site in Peninsular Malaysia.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133067587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744675
S. A. Rahman, Abdallah A. I Rayyan, K. Kopsidas
Ampacity indicates the maximum amount of current that could be safely transmitted through overhead conductors during certain environmental conditions. The ampacity depends on the conductor surface trait, which affects the heat exchange rates between the conductor and surroundings. However, the ampacity of the round and trapezoidal conductors is currently determined according to the heat transfer capability of the simple cylinder model; hence, it does not represent the actual conductors' performance. This paper investigates the impact of the simplification on the round and trapezoidal conductors' ampacity by modelling the heat exchange mechanisms experienced by the three conductor models using COMSOL Multi-physics. Consequently, each model's temperatures and ampacity values are extracted to identify the importance of the conductor surface trait. The investigation made on the 28.14 mm Drake conductor indicates that considering conductor surface trait could increase the round conductor's ampacity by 2.6 % and 4 % at temperatures of 150°C and 210 °C, respectively. Meanwhile, the discrepancy in the trapezoidal conductor's ampacity could be up to 2%. Hence, using the cylinder model to represent the overhead conductors' ampacity is not entirely appropriate.
电流是指在一定的环境条件下，能够通过架空导体安全传输的最大电流。电容取决于导体的表面特性，它影响导体与周围环境之间的热交换率。然而，目前圆形和梯形导体的容量是根据简单圆柱模型的传热能力来确定的;因此，它不能代表实际指挥家的表现。本文利用COMSOL Multi-physics对这三种导体模型的热交换机制进行建模，研究了简化对圆形和梯形导体电容的影响。因此，提取每个模型的温度和电容值，以确定导体表面特性的重要性。对28.14 mm Drake导体的研究表明，在150°C和210°C的温度下，考虑导体表面特性可以使圆形导体的电容量分别提高2.6%和4%。同时，梯形导体的电容差可达2%。因此，用圆柱模型来表示架空导线的电容容量并不完全合适。
{"title":"Examining the Importance of Conductor Surface Trait on Ampacity Determination","authors":"S. A. Rahman, Abdallah A. I Rayyan, K. Kopsidas","doi":"10.1109/ICPEA53519.2022.9744675","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744675","url":null,"abstract":"Ampacity indicates the maximum amount of current that could be safely transmitted through overhead conductors during certain environmental conditions. The ampacity depends on the conductor surface trait, which affects the heat exchange rates between the conductor and surroundings. However, the ampacity of the round and trapezoidal conductors is currently determined according to the heat transfer capability of the simple cylinder model; hence, it does not represent the actual conductors' performance. This paper investigates the impact of the simplification on the round and trapezoidal conductors' ampacity by modelling the heat exchange mechanisms experienced by the three conductor models using COMSOL Multi-physics. Consequently, each model's temperatures and ampacity values are extracted to identify the importance of the conductor surface trait. The investigation made on the 28.14 mm Drake conductor indicates that considering conductor surface trait could increase the round conductor's ampacity by 2.6 % and 4 % at temperatures of 150°C and 210 °C, respectively. Meanwhile, the discrepancy in the trapezoidal conductor's ampacity could be up to 2%. Hence, using the cylinder model to represent the overhead conductors' ampacity is not entirely appropriate.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123639292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744653
Mohd Ezwan Mahadan, A. F. Abidin, M. Yusoh, M. A. Hairuddin
The neutral conductors of grounded power systems are not always at zero potential with regard to the earth beneath them because of the nature of the system. This potential is also known as neutral to ground voltage (NTGV). Based on the IEEE Std 1159, the NTGV threshold should be below than 20V peak. However, due to numerous circumstances, such as the lightning strikes, high impedance of the return current path, non-linear load and grounding conditions, its magnitude tends to surpass the tolerable threshold value. Excess NTGV can lead to significant losses and safety risks for electrical consumers, such as erroneous equipment functioning and failure, frequent tripping, and electromagnetic interference. Furthermore, in order to investigate the effects and factors of high NTGV in educational building and distribution systems, a credible model must be used. The key focus of this paper is to determine the magnitude and form of the NTGV with respect to the neutral current and phase currents. Then, this paper discussed the model of the three-phase, four-wire underground cable in the educational building, comparing measurement data and simulation outcomes for the NTGV, neutral current and phase current. In this model, an XLPE cable is employed to connect the transformer and the load. The load at the educational building is constructed by combining the RL load and current sourcing. To validate the model, it is tested on two separate datasets from educational buildings. The simulation results are comparable to the measurement data. In conclusion, the purpose of determining the magnitude and form of the NTGV was met, and this model may be utilised to investigate the factors that contribute to elevated NTGV in educational buildings.
{"title":"Modelling Neutral to Ground Voltage (NTGV) on the Educational Building","authors":"Mohd Ezwan Mahadan, A. F. Abidin, M. Yusoh, M. A. Hairuddin","doi":"10.1109/ICPEA53519.2022.9744653","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744653","url":null,"abstract":"The neutral conductors of grounded power systems are not always at zero potential with regard to the earth beneath them because of the nature of the system. This potential is also known as neutral to ground voltage (NTGV). Based on the IEEE Std 1159, the NTGV threshold should be below than 20V peak. However, due to numerous circumstances, such as the lightning strikes, high impedance of the return current path, non-linear load and grounding conditions, its magnitude tends to surpass the tolerable threshold value. Excess NTGV can lead to significant losses and safety risks for electrical consumers, such as erroneous equipment functioning and failure, frequent tripping, and electromagnetic interference. Furthermore, in order to investigate the effects and factors of high NTGV in educational building and distribution systems, a credible model must be used. The key focus of this paper is to determine the magnitude and form of the NTGV with respect to the neutral current and phase currents. Then, this paper discussed the model of the three-phase, four-wire underground cable in the educational building, comparing measurement data and simulation outcomes for the NTGV, neutral current and phase current. In this model, an XLPE cable is employed to connect the transformer and the load. The load at the educational building is constructed by combining the RL load and current sourcing. To validate the model, it is tested on two separate datasets from educational buildings. The simulation results are comparable to the measurement data. In conclusion, the purpose of determining the magnitude and form of the NTGV was met, and this model may be utilised to investigate the factors that contribute to elevated NTGV in educational buildings.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129901628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-07DOI: 10.1109/ICPEA53519.2022.9744713
N. Amirah, M. Yusoff, M. Kassim
Opinion classifications from Twitter are still in demand among research works on related opinions or feelings expressed on various issues. One of the concerns expressed in Twitter is on water-related issues such as the lack of clean water supply. It has been found that the issue highlighted in Twitter is the frequent disruption of clean water supply in Malaysia. The discussions concerning this issue contain positive and negative emotions like anger, joy, worry, and frustration. The focal point of this article is to evaluate hybrid sentiment analysis using a machine learning classifier to analyze the polarity of opinions employing real data from Twitter. A series of experiments were performed on a hybrid of deep learning, support vector machine, Naïve Bayes and random forest with a lexicon-based model. In addition, the Malay sentiment lexicon score is proposed. The Malay sentiment lexicon scores have improved the accuracy and F1-score of all hybrid methods. The analysis uncovers that negative and positive polarity opinions can be beneficial to the relevant authorities to overcome the water supply disruption issue.
{"title":"Hybrid Machine Learning Methods with Malay Lexicon for Public Polarity Opinion on Water Related Issue","authors":"N. Amirah, M. Yusoff, M. Kassim","doi":"10.1109/ICPEA53519.2022.9744713","DOIUrl":"https://doi.org/10.1109/ICPEA53519.2022.9744713","url":null,"abstract":"Opinion classifications from Twitter are still in demand among research works on related opinions or feelings expressed on various issues. One of the concerns expressed in Twitter is on water-related issues such as the lack of clean water supply. It has been found that the issue highlighted in Twitter is the frequent disruption of clean water supply in Malaysia. The discussions concerning this issue contain positive and negative emotions like anger, joy, worry, and frustration. The focal point of this article is to evaluate hybrid sentiment analysis using a machine learning classifier to analyze the polarity of opinions employing real data from Twitter. A series of experiments were performed on a hybrid of deep learning, support vector machine, Naïve Bayes and random forest with a lexicon-based model. In addition, the Malay sentiment lexicon score is proposed. The Malay sentiment lexicon scores have improved the accuracy and F1-score of all hybrid methods. The analysis uncovers that negative and positive polarity opinions can be beneficial to the relevant authorities to overcome the water supply disruption issue.","PeriodicalId":371063,"journal":{"name":"2022 IEEE International Conference in Power Engineering Application (ICPEA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128562755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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