Ibnu Salam, Ibnu
Jurusan Teknik Elektro, Universitas Diponegoro Semarang Jl. Prof. Sudharto, SH, kampus UNDIP Tembalang, Semarang 50275, Indonesia

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PEMODELAN ARUS BOCOR ISOLATOR DISK BERBAHAN DASAR KACA PADA KONDISI KERING DAN BASAH Salam, Ibnu; Facta, Mochammad; Juningtyastuti, Juningtyastuti
Transient: Jurnal Ilmiah Teknik Elektro TRANSIENT, VOL. 4, NO. 2, JUNI 2015
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.254 KB) | DOI: 10.14710/transient.4.2.229-334

Abstract

Abstrak Selama ini pemodelan arus bocor isolator diasumsikan berupa  rangkaian yang terdiri dari resistansi linear dan kapasitansi. Beberapa penelitian menunjukkan bahwa arus bocor tidak selamanya berbentuk sinusoidal murni. Oleh sebab itu, diperlukan adanya model arus bocor isolator yang mampu menggambarkan peristiwa tersebut. Pada penelitian ini dilakukan pemodelan arus bocor bahan isolator kaca pada kondisi kering dan basah. Pemodelan arus bocor bahan isolator dilakukan dengan menyusun rangkaian ekivalen dari arus bocor isolator yang terdiri dari resistansi dan kapasitansi linier serta resistansi non-linear menggunakan program ATP / EMTP. Selain itu, dilakukan pemodelan matematis dengan pendekatan deret fourier yang digambarkan dan diilustrasikan dengan program MATLAB. Hasil validasi antara arus bocor hasil pemodelan dan pengukuran  menunjukan hasil yang mirip. Hasil penelitian menunjukkan amplitudo gelombang arus bocor hasil pemodelan memiliki nilai yang mirip dengan pengukuran. Persentase THD model memiliki nilai yang hampir sama antara pengujian dan simulasi yaitu kurang dari 1%. Kata kunci: Isolator Pasang Luar, Arus Bocor, Rangkaian Listrik Ekivalen, Simulasi Komputer.  Abstract Insulator leakage current is generally assumed as a circuit model consists of a linear resistance and capacitance. Some studies show that the leakage current is not always purely sinusoidal. Therefore, it is necessary to have an insulator leakage current models that able to simulate events that make insulator leakage current waveform in unsinusoidal. In this research, a leakage current model of glass insulator in wet and dry conditions is about to be observed. Insulators leakage current model was carried out by arranging an equivalent circuit model consist of linear resistance, capacitance and non-linear resistance and they were simulated using ATP / EMTP software package. A mathematical model performed in Fourier series approach were described and simulated by using MATLAB software package.The validation results showed good similarities between measured and simulated leakage current waveforms. The results showed that the amplitudes of leakage current of model were matched to direct measurements. The percentage of THD of models showed good similarities with direct measurements with difference less than 1%. Keywords: outdoor insulator, leakage current, equivalent circuit, computer simulation
FUEL ANALYSIS HSD DIESEL AND BIO DIESEL RELATED ENGINE PERFORMANCE REACH STAKER KALMAR IN PT. MERATUSLINE Ponidi, Ponidi; Salam, Ibnu
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4, No 1 (2019): June 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i1.1537

Abstract

Modern diesel engines require low sulfur fuel. So we held some external lab test of solar sampling at some diesel vendor to know its sulfur content. so that obtained by diesel vendor approaching standart. The sulfur content of DirjenMigas (0.25% w / w) is HSD of AKR of 0.153% w / w and Biosolar from ENEOS is 0.0343% w / w. The selection of two types of fuel is based on the needs of fuel by engine manufacturers (OEM) and the most efficient sulfur content. Side effects of excess sulfur content have resulted in the clogging of its fuel pump injection. So that the fuel supply to the combustion chamber is disrupted Too high sulfur levels also cause dangerous emissions and decreases its performance engine. To know the performance of the machine by Dyno / Dinamometer test machine performance, this is as a comparison material where the most efficient fuel that must be selected, to get the best engine performance, by three criteria taken such as Torque, Power engine, and Fuel Consumtion. So obtained Torque Output generated by HSD with Torque Reading result 810 lb.ft@1990 Rpm, Power result 302 HP, and specific fuel consumption 0.02 (kg / PS.jam) if compared with Bio diesel Torque output of 750 lb.ft @ 1960 rpm, Power of 283 HP and Specific fuel consumtion 0.01 (kg / PS.jam). of the data can be taken diesel decision that must be taken according to the level of fuel efficiency and engine performance is HSD solar AKR vendors with the level of efficiency of power output 6.29%, torque 7.40% and specific fuel consumption 50%.