YUSRENI WARMI - Academia.edu (original) (raw)

Papers by YUSRENI WARMI

The South East Asian Journal of Advance Engineering and Technology, Mar 31, 2024

Continuous monitoring of solar panel performance is essential to ensure effective and efficient g... more Continuous monitoring of solar panel performance is essential to ensure effective and efficient generation of electrical energy. Developing a monitoring system such as an I-V characteristic curve tracker enables real-time monitoring and identification of potential problems or efficiency improvements. The system utilizes a circuit switching system for accurate and continuous measurement, providing insight into how the solar panel responds to changing environmental and load conditions. The data recorded by temperature, light intensity, current, and voltage sensors on the solar panel provides valuable information about its condition and the environmental factors affecting it. Utilizing IoT technology allows real-time monitoring of the data, accessible via a web page and presented graphically. The data is also stored in Excel format for further analysis, so users can access and monitor continuously as long as they are connected to the internet. From the experimental results, the Voc of the solar panel ranged from 18.7 V to 20.42 V, and Isc between 0.0727 A to 0.2145 A, which were tested under solar irradiation ranging from 100 to 500 W/m². This research demonstrates the importance of continuous monitoring and the effectiveness of the developed monitoring system in providing real-time data for analysis and optimization of solar panel performance. The system has been tested to meet the IEC No. 13B-23 standard for accuracy classes 0.2 and 0.5. A comparison between manual testing and sensor testing shows that despite the difference in accuracy levels, the sensor measurements have a relatively low average error (1.04% for voltage and 0.64% for current) compared to manual measurements, indicating that the sensor is reliable in providing accurate data. This demonstrates the reliability and effectiveness of using the sensor in the solar panel characteristics monitoring system.

International Journal of Power Electronics and Drive Systems/International Journal of Electrical and Computer Engineering, Jun 1, 2024

One of the most popular electric motors used today is the 3-phase induction motor, which has a st... more One of the most popular electric motors used today is the 3-phase induction motor, which has a sturdy design, is less expensive, and is simple to use. Improvements to the materials used in the rotor or stator of induction motors, raising the number of motor phases, and employing a 3-phase induction motor for 1-phase power are just a few of the ways the motor is now being developed to perform better. These studies are all pricey, though. The goal of this study is to determine how to enhance the motor's performance at a reasonable cost. The suggested remedy was to create a 3-phase induction motor winding with a 1-layer design that resembled a symmetrical 6-phase winding. The primary study topics were the motor's rotor speed, mechanical torque, efficiency, and winding current when it was powered by a three-phase power source. The results of the study show that, although consuming less winding current, the 3-phase induction motor with a new winding design outperforms a traditional 3-phase induction motor in terms of rotor speed, mechanical torque, and efficiency.

TEM Journal, Feb 27, 2024

This research aims to determine the flashover voltage on the surface of porcelain insulators on 1... more This research aims to determine the flashover voltage on the surface of porcelain insulators on 150 kV transmission lines located in Payakumbuh, where the insulators are contaminated with dust and moss due to the effects of temperature and humidity. The experiment is carried out with only up to seven insulator plates due to the limitations of the available apparatus. For the further testing, a trend analysis is applied. According to the experimental results, a rise in temperature around the insulator will increase the flashover voltage value and accelerate the potential for a flashover event. This happens because high temperatures can reduce the insulator's dielectric strength and insulation resistance and increase the risk of flashover. The dielectric strength values decreased with an average decrease of 44.62% per insulator plate for dusty insulators and 45.08% for each plate for mossy insulators. The results aim to minimize flashover on transmission lines in hilly areas with relatively high contamination.

International Journal on Advanced Science, Engineering and Information Technology, Jun 7, 2023

The 150 kV Koto Panjang-Payakumbuh transmission line has a line length of 86 km with 249 towers, ... more The 150 kV Koto Panjang-Payakumbuh transmission line has a line length of 86 km with 249 towers, and the occurrence of the back-flashover in their transmission line is 74%, indicated by the high tower footing resistance as that is >3 ohms. The type of rock on the transmission line and the location of the towers, 79% in hilly or mountainous terrains, are among the factors that can cause an increase in the resistance value. The results of this study indicate that the level of back-flashover affects the value of the tower footing resistance by considering the number of electrode installations. When the towers were installed with more electrodes, the value of tower footing resistance, back-flashover level, and insulator voltage could be reduced to less than half of the previous ones. Moreover, the occurrence of the back-flashover rate in each tower can be dropped to ≤ 1 back-flashover rate of 100-km/year. Each tower's soil resistivity value has grown, yet fewer back-flashover disruptions exist. The span's length causes this, as the shorter the span, the faster the reflected wave will travel. As a result, it can lower the voltage in the insulator and diminish the likelihood that a flashover would occur.

Nucleation and Atmospheric Aerosols, 2023

International Journal on Advanced Science, Engineering and Information Technology, Feb 22, 2023

The lightning phenomenon is a natural disaster that endangers human life. The nature of grabbing ... more The lightning phenomenon is a natural disaster that endangers human life. The nature of grabbing objects closest to the cloud can cause fires, damage to electrical equipment, and even fatalities. The Padang Institute of Technology is a campus that has tall buildings, such as buildings B, C, D, E, and F, without an adequate lightning protection system. This is certainly a concern regarding security and safety for building users on the ITP campus. This research was conducted to reduce the risk of being hit by a lightning strike on the ITP campus. The protection system design process refers to the IEC 62305-3 standard comparing the protection angle and rolling sphere methods. Meanwhile, the procedure for calculating building requirements for a protection system or building protection level refers to the PUIPP and IEC 1024-1-1 standards. After analyzing the lightning rods in 5 ITP campus buildings by comparing the protection angle and rolling sphere methods, it can be concluded that there are still parts of the building that are not protected by the size of the installed air terminal. To overcome this, adding or adjusting the air terminal level is necessary so that all buildings are in the protection area. In addition, in conducting the analysis, the method considered the best to provide clear information on the part of the building that needs protection and the amount of the building that has been protected is the Rolling sphere method.

International Journal on Advanced Science, Engineering and Information Technology

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING FOR EMERGING TECHNOLOGIES (ICOMEET 2021)

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING FOR EMERGING TECHNOLOGIES (ICOMEET 2021)

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING FOR EMERGING TECHNOLOGIES (ICOMEET 2021)

International Journal on Advanced Science, Engineering and Information Technology

Andalas Journal of Electrical and Electronic Engineering Technology

This paper introduces a number of methods for identifying disturbances on transmission lines and ... more This paper introduces a number of methods for identifying disturbances on transmission lines and provides algorithms for classifying various disturbance types. working with the discrete wavelets transform (DWT) and various embedded systems techniques using a simulator to carry out digital simulations of system trials using the controlled technique, the nature of disturbance in distinct sub-systems is determined. The analysis of transmission lines using the wavelet transform is the main topic of this study, along with techniques for transmission line protection. These factors include channel capacity, channel length, simulation software, mother wavelet type, parameters, sampling frequency, and type of disturbance analysis.

International Journal of Electrical and Computer Engineering (IJECE)

The number of lightning stroke on the tower of the 150 kV Koto Panjang-Payakumbuh transmission li... more The number of lightning stroke on the tower of the 150 kV Koto Panjang-Payakumbuh transmission line located the rocky area has been observed. The high value of tower footing resistance indicates the occurrence of the back-flashover in the transmission line at intensity of 74%. The back-flashover occurrence is dominantly triggered by the tower footing resistance value. Also, the rate of back-flashover has an effect on the value of the tower footing resistance by considering the number of electrode installations. A design is proposed for the grounding system of the tower footings in order to reduce the rate of back-flashover. The results presenting in numerical simulation indicates that it works properly after adding 4 electrodes. That is to say, installing 4 electrodes in each tower has successfully decreased the tower footing resistance value, back-flashovers rate 80% and 90-95% of present value respectively. The insulator voltage can be reduced to less than half of the present volt...

International Journal of Electrical and Computer Engineering (IJECE)

Single-phase induction (asynchronous) motors are widely used at home. These motors have two windi... more Single-phase induction (asynchronous) motors are widely used at home. These motors have two windings and usually operate at a lower performance than 3-phase asynchronous motors which have three windings. For this reason, this study aims to design a new winding of a single-phase asynchronous motor by increasing the number of phases in the motor windings in order to increase the performance of the motor. This research was focused on 36 slot capacitor-start capacitor-run asynchronous motor. The design used 4 non-identical windings in the motor, where three windings acted as auxiliary windings and one winding acted as main winding. The rated current of the designed motor winding was 2.74 A for the main winding and 3.15 A for the auxiliary winding. The performance of the designed motor compared to the traditional single-phase asynchronous motor with the same structure of stator, rotor, and rated current. A traditional single-phase asynchronous motor had data: 1 HP, 220 V, 8.3 A, 1440 RPM...

Politeknik Negeri Padang, Oct 1, 2010

ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika, 2021

ABSTRAKPenelitian ini bertujuan untuk mengetahui seberapa besar nilai coating isolator yang dapat... more ABSTRAKPenelitian ini bertujuan untuk mengetahui seberapa besar nilai coating isolator yang dapat ditembus listrik berdasarkan Basic Insulator Level (BIL). Metode yang digunakan dalam perhitungan tegangan tembus listrik ialah metode Anderson dalam hal ini Critical Fashover (CFO). Untuk mengetahui penurunan daya tahan dielektrik isolator dapat dilihat dari seberapa besar tegangan flashover yang dihasilkan. Hasil dari perhitungan disimulasikan dengan MATLAB logika fuzzy. Pada penelitian ini ketika isolator disetting pada coating 0,3 mm dengan waktu kejadian flash 2 μs maka tegangan flashover yang dihasilkan sebesar 1,3 MV. Hasil simulasi ini menunjukan bahwa pada coating 0,3 mm tegangan flashover yang dihasilkan melebihi dari BIL isolator yang sudah ditetapkan yakni sebesar 1,27 MV. Isolator dalam kondisi seperti ini dapat ditembus listrik atau daya tahan dielektriknya menurun. Secara bersamaan ketika kemampuan coating berkurang, maka dapat diklasifikasikan isolator dalam keadaan koto...

Back flashover is one of the consequences of a direct lightning strike. Back flashover is caused ... more Back flashover is one of the consequences of a direct lightning strike. Back flashover is caused by the higher grounding resistance value of the tower leg. Doing so can create an overvoltage and can cause damage to electrical equipment. One way to minimize overvoltage due to back flashover is to adjust the grounding resistance at the foot of the tower. Tower 10 has a grounding resistance value of the tower foot of 4.78 ohms, the total back flashover is 29.085544 times / year. Tower 50 has a grounding resistance value of the tower foot of 14 ohms and the number of back flashover disturbances is 85.0213544 times / year. In tower 10 the value of the grounding resistance of the tower feet is smaller than the value of the grounding resistance of the menra feet 50, so the total number of back flashovers on tower 50 is higher than tower 10. The greater the value of the grounding resistance of the tower feet, the higher the number of back flashovers. The average grounding resistance of the ...

The South East Asian Journal of Advance Engineering and Technology, Mar 31, 2024

Continuous monitoring of solar panel performance is essential to ensure effective and efficient g... more Continuous monitoring of solar panel performance is essential to ensure effective and efficient generation of electrical energy. Developing a monitoring system such as an I-V characteristic curve tracker enables real-time monitoring and identification of potential problems or efficiency improvements. The system utilizes a circuit switching system for accurate and continuous measurement, providing insight into how the solar panel responds to changing environmental and load conditions. The data recorded by temperature, light intensity, current, and voltage sensors on the solar panel provides valuable information about its condition and the environmental factors affecting it. Utilizing IoT technology allows real-time monitoring of the data, accessible via a web page and presented graphically. The data is also stored in Excel format for further analysis, so users can access and monitor continuously as long as they are connected to the internet. From the experimental results, the Voc of the solar panel ranged from 18.7 V to 20.42 V, and Isc between 0.0727 A to 0.2145 A, which were tested under solar irradiation ranging from 100 to 500 W/m². This research demonstrates the importance of continuous monitoring and the effectiveness of the developed monitoring system in providing real-time data for analysis and optimization of solar panel performance. The system has been tested to meet the IEC No. 13B-23 standard for accuracy classes 0.2 and 0.5. A comparison between manual testing and sensor testing shows that despite the difference in accuracy levels, the sensor measurements have a relatively low average error (1.04% for voltage and 0.64% for current) compared to manual measurements, indicating that the sensor is reliable in providing accurate data. This demonstrates the reliability and effectiveness of using the sensor in the solar panel characteristics monitoring system.

International Journal of Power Electronics and Drive Systems/International Journal of Electrical and Computer Engineering, Jun 1, 2024

One of the most popular electric motors used today is the 3-phase induction motor, which has a st... more One of the most popular electric motors used today is the 3-phase induction motor, which has a sturdy design, is less expensive, and is simple to use. Improvements to the materials used in the rotor or stator of induction motors, raising the number of motor phases, and employing a 3-phase induction motor for 1-phase power are just a few of the ways the motor is now being developed to perform better. These studies are all pricey, though. The goal of this study is to determine how to enhance the motor's performance at a reasonable cost. The suggested remedy was to create a 3-phase induction motor winding with a 1-layer design that resembled a symmetrical 6-phase winding. The primary study topics were the motor's rotor speed, mechanical torque, efficiency, and winding current when it was powered by a three-phase power source. The results of the study show that, although consuming less winding current, the 3-phase induction motor with a new winding design outperforms a traditional 3-phase induction motor in terms of rotor speed, mechanical torque, and efficiency.

TEM Journal, Feb 27, 2024

This research aims to determine the flashover voltage on the surface of porcelain insulators on 1... more This research aims to determine the flashover voltage on the surface of porcelain insulators on 150 kV transmission lines located in Payakumbuh, where the insulators are contaminated with dust and moss due to the effects of temperature and humidity. The experiment is carried out with only up to seven insulator plates due to the limitations of the available apparatus. For the further testing, a trend analysis is applied. According to the experimental results, a rise in temperature around the insulator will increase the flashover voltage value and accelerate the potential for a flashover event. This happens because high temperatures can reduce the insulator's dielectric strength and insulation resistance and increase the risk of flashover. The dielectric strength values decreased with an average decrease of 44.62% per insulator plate for dusty insulators and 45.08% for each plate for mossy insulators. The results aim to minimize flashover on transmission lines in hilly areas with relatively high contamination.

International Journal on Advanced Science, Engineering and Information Technology, Jun 7, 2023

The 150 kV Koto Panjang-Payakumbuh transmission line has a line length of 86 km with 249 towers, ... more The 150 kV Koto Panjang-Payakumbuh transmission line has a line length of 86 km with 249 towers, and the occurrence of the back-flashover in their transmission line is 74%, indicated by the high tower footing resistance as that is >3 ohms. The type of rock on the transmission line and the location of the towers, 79% in hilly or mountainous terrains, are among the factors that can cause an increase in the resistance value. The results of this study indicate that the level of back-flashover affects the value of the tower footing resistance by considering the number of electrode installations. When the towers were installed with more electrodes, the value of tower footing resistance, back-flashover level, and insulator voltage could be reduced to less than half of the previous ones. Moreover, the occurrence of the back-flashover rate in each tower can be dropped to ≤ 1 back-flashover rate of 100-km/year. Each tower's soil resistivity value has grown, yet fewer back-flashover disruptions exist. The span's length causes this, as the shorter the span, the faster the reflected wave will travel. As a result, it can lower the voltage in the insulator and diminish the likelihood that a flashover would occur.

Nucleation and Atmospheric Aerosols, 2023

International Journal on Advanced Science, Engineering and Information Technology, Feb 22, 2023

The lightning phenomenon is a natural disaster that endangers human life. The nature of grabbing ... more The lightning phenomenon is a natural disaster that endangers human life. The nature of grabbing objects closest to the cloud can cause fires, damage to electrical equipment, and even fatalities. The Padang Institute of Technology is a campus that has tall buildings, such as buildings B, C, D, E, and F, without an adequate lightning protection system. This is certainly a concern regarding security and safety for building users on the ITP campus. This research was conducted to reduce the risk of being hit by a lightning strike on the ITP campus. The protection system design process refers to the IEC 62305-3 standard comparing the protection angle and rolling sphere methods. Meanwhile, the procedure for calculating building requirements for a protection system or building protection level refers to the PUIPP and IEC 1024-1-1 standards. After analyzing the lightning rods in 5 ITP campus buildings by comparing the protection angle and rolling sphere methods, it can be concluded that there are still parts of the building that are not protected by the size of the installed air terminal. To overcome this, adding or adjusting the air terminal level is necessary so that all buildings are in the protection area. In addition, in conducting the analysis, the method considered the best to provide clear information on the part of the building that needs protection and the amount of the building that has been protected is the Rolling sphere method.

International Journal on Advanced Science, Engineering and Information Technology

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING FOR EMERGING TECHNOLOGIES (ICOMEET 2021)

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING FOR EMERGING TECHNOLOGIES (ICOMEET 2021)

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING FOR EMERGING TECHNOLOGIES (ICOMEET 2021)

International Journal on Advanced Science, Engineering and Information Technology

Andalas Journal of Electrical and Electronic Engineering Technology

This paper introduces a number of methods for identifying disturbances on transmission lines and ... more This paper introduces a number of methods for identifying disturbances on transmission lines and provides algorithms for classifying various disturbance types. working with the discrete wavelets transform (DWT) and various embedded systems techniques using a simulator to carry out digital simulations of system trials using the controlled technique, the nature of disturbance in distinct sub-systems is determined. The analysis of transmission lines using the wavelet transform is the main topic of this study, along with techniques for transmission line protection. These factors include channel capacity, channel length, simulation software, mother wavelet type, parameters, sampling frequency, and type of disturbance analysis.

International Journal of Electrical and Computer Engineering (IJECE)

The number of lightning stroke on the tower of the 150 kV Koto Panjang-Payakumbuh transmission li... more The number of lightning stroke on the tower of the 150 kV Koto Panjang-Payakumbuh transmission line located the rocky area has been observed. The high value of tower footing resistance indicates the occurrence of the back-flashover in the transmission line at intensity of 74%. The back-flashover occurrence is dominantly triggered by the tower footing resistance value. Also, the rate of back-flashover has an effect on the value of the tower footing resistance by considering the number of electrode installations. A design is proposed for the grounding system of the tower footings in order to reduce the rate of back-flashover. The results presenting in numerical simulation indicates that it works properly after adding 4 electrodes. That is to say, installing 4 electrodes in each tower has successfully decreased the tower footing resistance value, back-flashovers rate 80% and 90-95% of present value respectively. The insulator voltage can be reduced to less than half of the present volt...

International Journal of Electrical and Computer Engineering (IJECE)

Single-phase induction (asynchronous) motors are widely used at home. These motors have two windi... more Single-phase induction (asynchronous) motors are widely used at home. These motors have two windings and usually operate at a lower performance than 3-phase asynchronous motors which have three windings. For this reason, this study aims to design a new winding of a single-phase asynchronous motor by increasing the number of phases in the motor windings in order to increase the performance of the motor. This research was focused on 36 slot capacitor-start capacitor-run asynchronous motor. The design used 4 non-identical windings in the motor, where three windings acted as auxiliary windings and one winding acted as main winding. The rated current of the designed motor winding was 2.74 A for the main winding and 3.15 A for the auxiliary winding. The performance of the designed motor compared to the traditional single-phase asynchronous motor with the same structure of stator, rotor, and rated current. A traditional single-phase asynchronous motor had data: 1 HP, 220 V, 8.3 A, 1440 RPM...

Politeknik Negeri Padang, Oct 1, 2010

ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika, 2021

ABSTRAKPenelitian ini bertujuan untuk mengetahui seberapa besar nilai coating isolator yang dapat... more ABSTRAKPenelitian ini bertujuan untuk mengetahui seberapa besar nilai coating isolator yang dapat ditembus listrik berdasarkan Basic Insulator Level (BIL). Metode yang digunakan dalam perhitungan tegangan tembus listrik ialah metode Anderson dalam hal ini Critical Fashover (CFO). Untuk mengetahui penurunan daya tahan dielektrik isolator dapat dilihat dari seberapa besar tegangan flashover yang dihasilkan. Hasil dari perhitungan disimulasikan dengan MATLAB logika fuzzy. Pada penelitian ini ketika isolator disetting pada coating 0,3 mm dengan waktu kejadian flash 2 μs maka tegangan flashover yang dihasilkan sebesar 1,3 MV. Hasil simulasi ini menunjukan bahwa pada coating 0,3 mm tegangan flashover yang dihasilkan melebihi dari BIL isolator yang sudah ditetapkan yakni sebesar 1,27 MV. Isolator dalam kondisi seperti ini dapat ditembus listrik atau daya tahan dielektriknya menurun. Secara bersamaan ketika kemampuan coating berkurang, maka dapat diklasifikasikan isolator dalam keadaan koto...

Back flashover is one of the consequences of a direct lightning strike. Back flashover is caused ... more Back flashover is one of the consequences of a direct lightning strike. Back flashover is caused by the higher grounding resistance value of the tower leg. Doing so can create an overvoltage and can cause damage to electrical equipment. One way to minimize overvoltage due to back flashover is to adjust the grounding resistance at the foot of the tower. Tower 10 has a grounding resistance value of the tower foot of 4.78 ohms, the total back flashover is 29.085544 times / year. Tower 50 has a grounding resistance value of the tower foot of 14 ohms and the number of back flashover disturbances is 85.0213544 times / year. In tower 10 the value of the grounding resistance of the tower feet is smaller than the value of the grounding resistance of the menra feet 50, so the total number of back flashovers on tower 50 is higher than tower 10. The greater the value of the grounding resistance of the tower feet, the higher the number of back flashovers. The average grounding resistance of the ...