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All Journal JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Jurnal SImetri Rekayasa
Agus Almi Nasution
Universitas Harapan Medan
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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ANALISIS UMUR MINYAK TERHADAP TEMPERATUR TRANSFORMATOR 150KV AKIBAT PENURUNAN TEGANGAN TEMBUS PADA PEMBANGKIT LISTRIK TENAGA GAS (PLTG) 2.1 PT PLN (PERSERO) UNIT PELAKSANA PEMBANGKITAN BELAWAN Indra Roza; Agus Almi Nasution; Heri Setiawan
JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Vol 3, No 1 (2019): Journal Of Electrical And System Control Engineering Agustus
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jesce.v3i1.2788

Abstract

Pemakaian pada kondisi pembebanan yang  sangat  besar  secara  terus  menerus, maka  pada transformator akan menimbulkan panas pada daerah/bagian internal dari transformator atau bisa disebut sebagai temperatur hot-spot yang bila dibiarkan akan  menyebabkan  degradasi  pada  isolasi transformator. Dengan temperatur yang besar dapat menyebabkan transformator menjadi panas dan bisa mengurangi  keandalan  kerja  dari  transformator. Semakin tinggi temperatur minyak transformator maka kemampuan dielektrik minyak akan semakin menurun.Bahan dielektrik pada peralatan tegangan dibutuhkan untuk memisahkan penghantar listrik yang bertegangan sehingga antar penghantar yang bertegangan tersebut  tidak  terjadi hubung  singkat  yang  dapat  menyebabkan  lompatan  api atau  percikan.  Salah  satu  peralatan tegangan tinggi   yang digunakan dalam sistem tenaga listrik  transformator tenaga dengan bahan dielektrik yaitu minyak trafo yang berfungsi untuk memisahkan  penghantar yang bertegangan dan  pendingin . Minyak trafo termasuk jenis bahan dielektrik cair berupa minyak. mempunyai kerapatan 1000 kali lebih besar daripada dielektrik gas sehingga kekuatan dielektriknya / kemampuan tegangan tembusnya lebih tinggi dari pada dielektrik gas. Hasil pengujian  tegangan tembus pada temperatur kritis (90°C) minyak baru main Transformator GT 2.1 sebesar 62.19 kV, Minyak 1 tahun sebesar  61.55 kV, Minyak 2 tahun sebesar 59.23 kV, dan Minyak 5 tahun sebesar 58.23 kV.  Histori logsheet dari main tansformator GT 2.1 temperatur minyak transformator berada diantara 80°C s/d 90°C, berarti minyak baru main ransformator GT 2.1 dan minyak 1tahun masih layak digunakan. Sedangkan minyak 2 tahun dan 5 tahun memiliki tegangan tembus juga masih dapat dikatakan layak pakai tetapi masuk kedalam kategori minyak second  layak pakai. Hasil yang didapatkan dari penelitian ke 4 variabel minyak tersebut masih dikatakan layak pakai berdasarkan kategorinya menurut IEC 60296-2003 dan IEC 60422-2005.
Rancang Bangun Alat Pengukur Dan perhitungan Energi Listrik Menggunakan ACS 712 Berbasis Arduino Imam Ahmad Tarigan; Agus Almi Nasution
Jurnal Simetri Rekayasa Vol 3 No 1 (2021): Edisi April 2021
Publisher : Universitas Harapan Medan

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Abstract

Electrical energy is one of the quantities of energy in the form of electricity that is used to carry out a business, for example to turn on lights, cool a room, heat water, cook and so on. Electrical energy is rarely measured or calculated so it is rarely known how much electrical energy has been used. Generally, there are only measuring instruments for measuring voltages and currents or amperes. Energy is the product of current, voltage and time or power multiplied by time. The only energy measurement tool is the PLN kwh meter. However, the kwh meter is difficult to monitor because it is accumulative and cannot be reset to 0. So it is difficult to use it as a measure of electrical energy. This design uses Arduino Uno 328 to process the input signal from the voltage sensor and the ACS 712 sensor. The voltage sensor functions as to measure voltage. and the ACS 712 sensor serves to measure current. Then the results of the measurement data and calculations can be viewed on the LCD. LCD as output from Arduino Uno
Rancang Bangun Pembuatan Sistem Charger Menggunakan Buck Boost Konverter Pada Sistem PLTS willy Alamsyah; Agus Almi Nasution
Jurnal Simetri Rekayasa Vol 3 No 1 (2021): Edisi April 2021
Publisher : Universitas Harapan Medan

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Abstract

Currently, the use of renewable energy is unavoidable and is encouraged to exploit it on a large scale with the aim of minimizing the use of fossil energy. Fossil energy that is getting depleted and non-renewable can only be used as backup energy when new renewable energy is being developed because renewable energy still has many weaknesses and shortcomings. Renewable technology in the form of PLTS. PLTS converts sunlight energy into electrical energy. Electrical energy is stored in the battery. The result of the conversion that has become DC electricity is then regulated by the Buck-Boost Converter. PLTS Energy Utilization is offered technology for setting up an Arduino microcontroller charger, namely knowing whether or not the charger system is active. When the battery is full, the current will be stopped. And if the battery charge is empty then the battery load cannot be used. To stabilize the voltage into the battery used Regulator LM317. To regulate the input voltage remains constant by regulating the voltage. If the input voltage is too low below 12V DC then the regulator will increase it and if the voltage is too high the regulator will lower it where the regulator output voltage will be compared to the reference voltage, namely the setpoint voltage if the voltage is stable. The voltage is set to reach 12-14V DC. Battery also emits electrical energy to the Arduino Uno 328. To read the current and voltage from the solar panel through the Arduino Uno, see the LCD.
SINKRONISASI GENERATOR 635 KVA DENGAN GENERATOR 635 KVA MENGGUNAKAN MODULE DEEP SEA Nurul Fahmi Sahputra; Eddy warman; Agus Almi Nasution
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Abstract

In the operation of a generator, it must be carried out in a short time to adjust the voltage and frequency required at the load and also equalize between generator 1 and the others. If the synchronization operation of the generator is done manually by the operator, it takes time and a level of accuracy. Therefore, research related to the synchronization of generators with generators using the Deep Sea Electronic Module 8610 was carried out. By doing this research, it is hoped that later it can help the generator operation process so that generator 1 and generator 2 can work by sharing the load when used. The Deep Sea Elektonic 8610 module is a tool that is used to synchronize between generators and generators and can start and stop generators properly automatically and is able to protect in case of disturbances, both under voltage, over voltage, over load, reverse power relay, and failure phases. voltage. This system works automatically when the PLN electricity supply is cut off, if this situation occurs, the generator start-stop system will automatically activate and for 15 seconds the load can be supplied by the generator. When PLN electricity has arrived, the deep sea module will transfer the load to PLN and synchronize the two generators, enter colling down, then turn off the generator, and the generator will be in standby again.
Co-Authors Eddy warman Heri Setiawan Imam Ahmad Tarigan Indra Roza Nurul Fahmi Sahputra willy Alamsyah