Article Per Year (5 Year)
p-Index From 2020 - 2025
7.214
P-Index
This Author published in this journals
All Journal Jurnal Mahasiswa TEUB
Moch. Dhofir
Jurusan Teknik Elektro Fakultas Teknik Universitas Brawijaya
Education

Published : 60 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 60 Documents
Search

 1   2   3   4   5 
RESETTING RELE DIFERENSIAL DALAM MEMPERSIAPKAN UPRATING TRAFO 70/20 kV MENJADI 150/20 kV DI GARDU INDUK BLIMBING Mubarok, M. Farid Ibnu; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini menjelaskan mengenai re-setting rele diferensial sebagai proteksi transformator di Gardu Induk Blimbing. Re-setting rele diferensial ini dilakukan karena adanya uprating transformator. Uprating transformator dilakukan untuk mendapatkan kapasitas gardu induk yang lebih tinggi. Penelitian ini dimulai dengan menentukan nilai hubung singkat pada Gardu Induk, rating PMT, rasio CT, setting diferensial, dan slope. Peneliti akan menggunakan perhitungan matematis. Dimana nilai perhitungan matematis akan disimulasikan menggunakan software ETAP. Berdasarkan hasil perhitungan matematis dan simulasi didapatkan nilai hubung singkat pada sisi primer adalah 1717 A untuk hubung singkat 3 fasa, 1487 A untuk hubung singkat 2 fasa, dan 1071 A untuk hubung singkat 1 fasa ke tanah. Sedangkan di sisi sekunder transformator memiliki nilai hubung singkat sebesar 12900 A untuk hubung singkat 3 fasa, 11172 A untuk hubung singkat 2 fasa, dan 7527 A untuk hubung singkat 1 fasa ke tanah. Nilai Pemutus yang digunakan dalam proteksi pada sisi primer adalah 20 kA dan pada sisi sekunder sebesar adalah 25 kA. Nilai Rasio transormator arus pada sisi primer dan sekunder secara berturut-turut adalah 300:1 dan 2000:1. Selanjutnya untuk hasil perhitungan arus setting dan diferensialnya adalah 0,396 A dengan besar slope 1 sebesar 11,87 % dan slope 2 sebesar 23,74%. Kata kunci— Uprating Transformator, Hubung Singkat, Setting Rele
PERANCANGAN SISTEM DIGESTER BIOGAS PADA SKALA RUMAH TANGGA Mauludi, Mohammad Zidan; Dhofir, Moch.; Yudaningtyas, Erni
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The main focus of this journal is the design of a household-scale biogas digester system. The research method begins with a literature study, followed by a survey of the research location, data collection of biomass weight, analysis of biomass weightdata at the household scale, analysis of biomass weight data at the village scale, and finally drawing conclusions and providingrecommendations. The results of this thesis include, firstly, on a household scale, the maximum biomass weight obtained includescow manure weighing 47.4 kg per day and goat manure weighing 11.648 kg per day, a C/N ratio of biomass of 19.93, a volume ofwater mixed with biomass of 123,920 cm³ per day, a potential biogas energy production of 2,478,400 cm³ per day, potential electricity that can be generated is 15.118 kWh per day, material requirements for building the biogas digester system include a total need for 2,266 bricks, 619.15 kg of cement, 2.18 m³ of sand, 133.64 L of water, 0.0916 m³ of fine aggregate, 0.11 m³ of coarse aggregate, 6” PVC pipe measuring 2.9572 m, 6” PVC sockets of 2 pieces, 1/2" galvanized steel pipe measuring 0.3154 m, 1/2" galvanized sockets of 1 piece, and 1/2" gas taps with 3/8” output of 1 piece with a construction cost of Rp. 5,445,973.43, a difference in potential electricity energy compared to electricity consumption of 7.9425 kWh per day, and the implementation of a combined scheme of PLN electricity installation with a biogas generator requires additional components such as a biogas generator, a 4A Miniature Circuit Breaker (MCB), an Auto Transfer Switch (ATS), and NYY cables 2 x 1.5 mm². Secondly, on a village scale, the maximum biomass weight obtained includes cow manure weighing 679.4 kg per day and goat manure weighing 294.112 kg per day, a C/N ratio of biomass of 20.52, a volume of water mixed with biomass of 2,094,080 cm³ per day, a potential biogas energy production of 41,881,600 cm³ per day, potential electricity that can be generated is 255.48 kWh per day, the number of biogas digester systems that can be built is 16 units with a construction cost of Rp. 87,135,571.84, and the cost difference of full PLN electricity compared to a combination of PLN and biogas is Rp. 10,362,268.80 or 79%. Keywords— biomass, biogas, conversion, biogas digester system.
ANALISA PERBAIKAN SUSUT ENERGI 20 kV PADA PENYULANG PRIORITAS JARINGAN DISTRIBUSI TEGANGAN MENENGAH DI PT. PLN (PERSERO) ULP SAMPANG Sydney, Agnes Amadea Rullynda; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Population growth and economic activity in Sampang Regency have increased the demand for electricity, creating the need for an adequate power distribution system. Data from UID East Java shows that ULP Sampang had losses of 26.82% in August and 26.05% in September, consisting of technical and non-technical losses. To improve the efficiency of the distribution system in ULP Sampang, it is necessary to analyze and plan the addition of capacitor banks. This analysis will use the Newton-Raphson method in ETAP power flow analysis software. Meanwhile, to determine the location of addition of capacitor banks based on loss sensitivity and reactive power comparison. Among the 9 reinforcements connected to the Sampang substation, the Kedungdungreinforcement has the highest voltage drop value reaching 9.59%, based on the data analysis, condition 7 is the most optimal condition to install capacitors with the following capacity: 1.0914 MVAR at Bus-3, 1.0048 MVAR at Bus-4, 0.9436 MVAR at Bus-6, 0.8564 MVAR at Bus-8, 0.3572 MVAR at Bus-29, and 1.0944 MVAR at Bus-2. The addition of capacitors successfully reduced the voltage drop and power dissipation values up to Condition 7. However, in condition 8, there was an increase in active and reactive power because the capacitor banks were installed without using the loss sensitivity method, focusing only on the bus with the largest power loss. Index Terms— Voltage Drop, Active Power Loss, Capacitor Bank, Sensitivity Analysis, Norm, ETAP
ANALISIS EFISIENSI TRANSFORMATOR DISTRIBUSI DI PT. SADHANA Pratama, Muhammad Arkan Restu; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Currently, electrical energy is one of the main needs in everyday life, so the quality of electrical energy that reaches consumers’ needs to be considered. This is related to the efficiency of the distribution transformer. The analysis methods that can be used to determine the efficiency of the distribution transformer are the transformer loading percentage analysis method, load imbalance analysis, transformer total loss analysis, and transformer efficiency analysis. In this study, the authors collected current data and total power data on 2 distribution transformers at PT Sadhana, Indonesia. The result of this study is that the highest totaltransformer loss value occurs in transformer 1 with a value of 9,62 kW and a load current of 1704,29 A. While the lowest total loss value occurs in transformer 2 with a value of 5,74 kW and a load current of 1151,43 A. The highest transformer efficiency occurs in transformer 2 which is 99,23% with a transformer load percentage of 39,89%. While the lowest transformer efficiency occurs in transformer 1 with a value of 99,12% and a transformer load percentage of 59,14%. From all the analysis results, it is known that the load current is directly proportional to the total loss of the transformer, and the transformer efficiency is at its nominal value when the transformer loading is in the range of 40%-80%. Keywords: Distributing Transformer, Percentage of Loading, Load Imbalance, Transformer Total Losses, Transformer Efficiency.
PENGARUH PERBESARAN JUMLAH ELEKTRODA TERHADAP TEGANGAN TEMBUS PADA DIELEKTRIK UDARA MENGGUNAKAN SUMBER TEGANGAN TINGGI AC Satria, Muchamad Iqbal; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Based on the law of enlargement, the probability value of breakdown voltage in conductor insulation is influenced by changesin the size or number of conductor arrangements. This change affects the insulation application standards that will be appliedto high voltage equipment. This research describes the effect of increasing the number of electrodes on the probability ofbreakdown voltage in air dielectrics using high voltage AC. The research method used is to collect data through testingbreakdown voltage and leakage current at the High Voltage and Applications Laboratory of Brawijaya University, as well assimulating electric field distribution with FEMM 4.2 software. Variations in the electrode arrangement of the rods used are1 pair, 2 pairs, 3 pairs, 4 pairs, and 5 pairs. Breakdown voltage testing was carried out using the Up and Down method in40 trials and analyzed based on the Normal Distribution graph (Gaussian). The results obtained from this research are theinfluence of increasing the number of electrode arrays on the breakdown voltage probability value, where the greater thevalue of increasing the number of electrodes, the greater the breakdown voltage probability value at the same voltage. Thevalue of the leakage current between the electrode arrays increases as the number of arrays applied increases. This causesthe air resistance value between the electrode arrays to decrease as the amount applied increases. Keywords: Breakdown voltage; Leakage current; Probability; Enlargement law; Electric field
ANALISIS KOORDINASI SISTEM PROTEKSI RELAI OVERCURRENT PADA JARINGAN DISTRIBUSI UNIT 3A PLTU PAITON Andreyanto, Tegar Setyo; Dhofir, Moch.; Hasanah, Rini Nur; Siswandi, Wawan
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research aims to determine the appropriate OCR settings to handle potential short-circuit currents in the distribution network of Unit 3A at Paiton Power Plant under existing load conditions. This study focuses on the Overcurrent Relay (OCR) protection device. The short-circuit current calculations are performed mathematically using the per-unit method and sequence impedance circuit. The OCR resetting calculations in this study apply the British Standard BS-142 for relay current settings, the IEC 60255-151 standard for inverse relay operating time, and the IEEE 242 standard for relay coordination time delay. In this study, short-circuit current simulation and OCR operation simulation are conducted using the ETAP 12.6 application. The results of this research indicate the OCR relay settings as follows: Extremely Inverse with a Pickup of 0.88 and TMS of 0,425, Very Inverse with a Pickup of 0.4 and TMS of 0.1, Long Time Inverse with a Pickup of 0.75 and TMS of 0.025. Additionally, relay coordination with a time delay of 0.2-0.4 seconds is achieved. Based on the simulations, the OCR operates effectively and in compliance with the standards. Keywords— Overcurrent relay, Short Circuit, ETAP, Relay Setting
KARAKTERISTIK PENGUJIAN TEGANGAN TEMBUS BOLAK-BALIK MINYAK WIJEN DENGAN MENGGUNAKAN ELEKTRODA HOMOGEN DAN TIDAK HOMOGEN Haidar, Achmad; Dhofir, Moch.; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the electric power transmission system from the generation to the consumers, a reliable system is needed. The transformer isone of the very important electrical components in this system. In high-voltage equipment, especially power transformers,insulation is essential to separate two or more high-voltage conductors. Transformer oil is one of the liquid insulating materialsthat serves as insulation and coolant in transformers. Failure of the insulation system in electrical equipment can result in abreakdown voltage that can occur in the liquid dielectric in the form of oil. Therefore, this research will describe the influenceof water content and electrode shape on the probability of breakdown voltage in the dielectric oil, specifically pure sesame oil,using an Alternating Current (AC) voltage source. The shape of the electrode will affect the distribution of the electric field inthe conductor within the power transformer. Non-uniform field distribution will increase the potential for breakdown voltage.The testing was conducted at the High Voltage and Application Laboratory, Department of Electrical Engineering, Faculty ofEngineering, Brawijaya University. The simulation of electric field distribution for each electrode shape was carried out usingFEMM 4.2 software. Purification through heating was done to reduce the water content in pure sesame oil. Electrical testing(breakdown voltage testing circuit) and physical testing (water content testing using the oven method) were conducted todetermine the feasibility of sesame oil as an insulator. The test results showed that the breakdown voltage value of pure sesameoil increased from 16.73 kV/2.5 mm to 38.54 kV/2.5 mm for plate-plate electrodes and from 14.03 kV/2.5 mm to 31.27 kV/2.5 mmfor needle-plate electrodes. Heating pure sesame oil at varying temperatures of 25-70°C for 15 minutes resulted in an increasein breakdown voltage, with the highest average at 70°C being 46.71 kV/2.5 mm for plate-plate electrodes and 38.46 kV/2.5 mmfor needle-plate electrodes. The uniformity of the electric field with plate-plate electrode shape was 1 or 100%, while for theneedle-plate electrode shape, it was 0.4785 or 47.85%. Keywords: Breakdown voltage, electric field, insulating oil, sesame oil, water content.
PENAMBAHAN PROTEKSI OVERCURRENT RELAY UNTUK MENINGKATKAN KEANDALAN PENYULANG JETIS PADA GI WLINGI Gymnastiar, Muhammad Ilham; Dhofir, Moch.; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this study is to obtain the setting of the overcurrent relay (OCR) and the right coordination to protect the Jetis feeder network from 3-phase and 2-phase short-circuit current levels. The addition of OCR is also done on the Jetis Feeder to improve network reliability. To set OCR, it starts by calculating the 3-phase and 2-phase short-circuit currents in each protection zone based on the impedance of the equipment that supports each protection zone. The calculation of OCR settings uses the British BS-142 standard guideline with OCR working time using the IEC 60255-151:2009 standard with the OCR curve type standard inverse. ETAP software in the study was used to simulate short-circuit currents and also OCR work analysis. The output of the ETAP simulation is in the form of short-circuit current values for each protection zone and also the OCR working time curve of each protection zone. The result of this study is OCR resetting from the existing value that the OCR coordination condition of zone 1 and zone 2 is still overlapping. Therefore, OCR zone 1 and OCR zone 2 were reset with the TMS result in zone 1 being 0.4 and TMS zone 2 being 0.225. The trip time distance between zone 1 and zone 2 is 0.397s. The analysis of the addition of OCR in Zone 3 to improve reliability by sharing the load. The addition of OCR in zone 3 results in a TMS of 0.1. The trip time distance between zone 2 and zone 3 is 0.283s which is in accordance with the IEEE std 242-1986 standard for the working time limit between two relays is 0.2s-0.4s. Therefore, the delay time distance in zone 1, zone 2 and zone 3 relays has worked well according to existing protection guidelines. Keywords — Relay, Over Current Relay, time setting, current setting, Feeder, ETAP.
ANALISIS KINERJA VACUUM CIRCUIT BREAKER PADA SISI 13,8 kV PT PAITON OPERATION & MAINTENANCE INDONESIA (POMI) UNIT 3 Adityara, Farrel Billy; Dhofir, Moch.; Hasanah, Rini Nur; Siswandi, Wawan
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to analyze the performance of the VCB based on the parameters in SPLN Standard No. 52-1 1983 and IEC 62271-100 and to determine the technical feasibility of the 13,8 kV VCB work at PT POMI Unit 3A is still feasible to operate or not. The VCB parameter test uses standards on each test with the parameters of insulation resistance, contact resistance, synchronous contact, and vacuum. This study was conducted by comparing the data of the test results in 2015 and 2021 with the standard values in each test. In the insulation resistance test results obtained at each measuring point, each phase has a value above 13,8 MΩ. The contact resistance test results of each phase obtained have a value below 22 μΩ. In the synchronous contact test, the results of calculating the delta time or the difference in working time when VCB Open and VCB Close have a value below 10 ms. The results of vacuum testing of each phase on the test equipment indicator show an indication of "GOOD" which means that the pressure in the VCB has a value below 10-7 mbar. Based on the test results of insulation resistance, contact resistance, synchronous contact, and vacuum, the VCB 13,8 kV PT POMI Unit 3A Incoming is in a suitable condition for use and can be operated because the test results according to standards. Keywords – Vacuum Circuit Breaker (VCB), Insulation Resistance, Contact Resistance, Synchronous Contact, Vacuum.
PENGUJIAN TEGANGAN TEMBUS BOLAK BALIK PADA BAHAN ISOLASI MINYAK JARAK SEBAGAI ALTERNATIF MINYAK TRANSFORMATOR Syarifasa, Arkananta; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of vegetable oil, especially castor oil as liquid insulation, needs to be proven by testing the breakdown voltage anddielectric strength of the oil as liquid insulation to predetermined standards. The test is to determine the breakdown voltageresistance and suitability of castor oil as an alternative liquid insulation for transformer oil in accordance with SPLN (StateElectricity Company Standards) and IEC (International Electrotechnical Commission) standards. The research method in thisstudy is analysis and direct measurement of the variables tested, namely the effect of heating with temperature variations on the breakdown voltage of castor oil. Testing of heating temperature variations on oil shows that there is an increase in the breakdown voltage value of castor oil after being given a directly proportional variation in heating temperature and experiencing a quite significant increase in breakdown voltage.  Keywordrs : Castor oil, Breakdown Voltage, Moisture Content, Permittivity, Conductivity
Co-Authors Achmad, Baihaqi Adinda, Kejora Cinta Adityara, Farrel Billy Al Fawwaz, Muhammad Ghozi Ali Mustofa Andiena, Rina Andreyanto, Tegar Setyo Angkasa, Aulia Ardiansyah, Muhammad Doni Ardiansyah, Zakaria Ariella, Syafika Safa Assami, Emir Faruq Astari, Bela Natasya Badriyah, Intan Layla Darsono, Wiwin Diwirya, Raihandika Putra Kusuma Erni Yudaningtyas Faishal, Luthfi Nur Fatahillah, Muhammad Fianto, Aulia Ramadhan Firdausi, Aditya Mahardika Ganendra, Risang Gaol, Gerald Matthew Lumban Ghifari, Ahmad Goegoes Dwi Nusantoro Gumintang, Adnan Gymnastiar, Muhammad Ilham Hadi Suyono Haidar, Achmad Handoyono, Tito Tri Imtiyaz, Kholis Jagad, Mohammad Wahyu Kharsya, Artnezzar Khawarizmy, Muhammad Zinedine Latif, Nabila Fauziah Lestariyanto, Arthur Rahmad Maulana, Eka Mauludi, Mohammad Zidan Maynaki, Erlangga Rizky Mubarok, M. Farid Ibnu Muyassar, Tegar Prasetyo, Achmad Ari Dwi Prastiawan, Hilmi Arif Pratama, Muhammad Arkan Restu Pratomo, Setyo Fajar Purba, Andreas Putra Christiawan Purba, Yobel Yehezkiel Putra, Deni Dwi Rahman Ramadhan, Muhammad Dicky Rasyid, Athallah Rini Nur Hasanah Risnugroho, Brian Rizal, Mohammad Iqbal Fakhrur Rizqiyatullah, Muhammad Rafli Satria, Muchamad Iqbal Sinaga, Andreas Sober Siregar, Josua Hatorangan Siswandi, Wawan Sitompul, Ezra Ananda Situmorang, Haryadi Putra Syarifasa, Arkananta Sydney, Agnes Amadea Rullynda Teguh Utomo Thuhu, Dias Satriyo Tri Nurwati Unggul Wibawa Wardhana, Anak Agung Sagung Gede Paramitha Wijaya, Rizki Adi Wijono, n/a Yuka, Helmi Dwi ‘Aqila, M. Farrel Nikkola Putra