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All Journal International Journal of Electrical and Computer Engineering Jurnal Teknik Elektro Jurnal Momentum Visipena Rang Teknik Journal Journal on Education Ensiklopedia Research and Community Service Review
Zulkarnaini Zulkarnaini
Institut Teknologi Padang
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Mechanical Engineering Social Sciences Other

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Journal : International Journal of Electrical and Computer Engineering

 1 
Proposal of analysis method to reduce back-flashover rate taking account of tower footing resistance Yusreni Warmi; Zulkarnaini Zulkarnaini; Abdul Rajab; Chitra Yuanisa; Rizki Oktrinanda Elyas; Andi M. Nur Putra; Zuriman Anthony
International Journal of Electrical and Computer Engineering (IJECE) Vol 13, No 1: February 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v13i1.pp94-106

Abstract

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 voltages as much as 30-50%. In more detail, in tower 77, the value of the tower footing resistance drops to 2.84 Ω, the flashover rate drops to 0.57/100 km/year and the insulator voltage drops to 0.99 MV when a disturbance occurs.
A new windings design for improving single-phase induction motor performance Zuriman Anthony; Erhaneli Erhaneli; Yusreni Warmi; Zulkarnaini Zulkarnaini; Anggun Anugrah; Sepannur Bandri
International Journal of Electrical and Computer Engineering (IJECE) Vol 12, No 6: December 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v12i6.pp5789-5798

Abstract

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, 50 Hz, and 4 poles. The results of this study indicated that the designed motor operated with power factors almost close to unity and had higher output power, torque, and efficiency than the traditional single-phase asynchronous motors.
Co-Authors Abdul Rajab Andres Andres Anggun Anugrah Chitra Yuanisa Dasman Dasman Diaz Satya Nugraha Donny Rahmad Eko Saputra Erhaneli, Erhaneli Fauzan Iqbal Hafni, Fauza Kartiria Kartiria Lailatul Qadri Michel A.A Mohammad Iqbal Muslim Muslim Popon Oktorezki Putra, Andi M. Nur Riki Reynaldi Barta Rizki Oktrinanda Elyas Saiful Saiful Samsul Bahri Sepannur Bandri Sepriadi Sepriadi Trino Juni Susanto Ujang Rahman Hakim Welya Roza Yusreni Warmi Yusreni Warmi Zuriman Anthony