Garuda - Garba Rujukan Digital

PENGARUH VARIASI KONSENTRSAI LARUTAN KOH TERHADAP UNJUK KERJA ELEKTROLISER TIPE WET CELL Ikhsaniyusuf Alfiansyah Putra; Moch. Dhofir; Lunde Ardhenta
Jurnal Mahasiswa TEUB Vol. 10 No. 6 (2022)
Publisher : Jurnal Mahasiswa TEUB

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

This study uses a wet cell type HHO gas generator which was developed with the addition of PWM as a control of duty cycle, frequency, and voltage. The duty cycle in PWM is set at 75% and the frequency is set at 1 kHz. The electrodes used are made of grade A graphite with dimensions of W x W x H: 14 cm x 2 cm x 2 cm. The catalyst used was KOH with variations of 10 grams, 15 grams, and 20 grams dissolved in 1 L of distilled water. Each test was carried out with a pure DC source and with a PWM source for a period of 15 minutes for each test. Parameters measured in the test are voltage, current, temperature, and volume of HHO gas. Meanwhile, what is calculated is the power needed by the HHO generator and the efficiency of the HHO generator. The results obtained in this study were the average volume of the highest HHO gas was 94.67 ml/minute when using a pure DC source and 20 grams of KOH. The smallest power consumption is 33.90 - 41.25 Watt when using a PWM and 10 gram KOH source. The highest efficiency is 21.95% when using a 20 gram PWM and KOH source.Keywords: HHO gas, Pulse

PENGARUH VARIASI JARAK ELEKTRODA TERHADAP UNJUK KERJA ELEKTROLISER TIPE WET CELL Muhaammad Naufal Harist; Moch. Dhofir; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 10 No. 6 (2022)
Publisher : Jurnal Mahasiswa TEUB

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

This study discusses how to reproduce HHO (Hydrogen Hydrogen Oxygen) gas by water electrolysis process with electrolyzer wet cell or wet type. The method used in this research is experimental. The design of this tool is divided into 3 main stages, manufacture of containers, manufacture of water traps, and manufacture of gas flowmeters. The container measuring 120 mm x 100 mm x 140 serves as a place for the process of separating water molecules (?2?) into its constituent compounds, namely hydrogen (?2 ) and oxygen (?2 ) or it can be called water electrolysis. The electrode used is a graphite with measuring of graphite electrode is 140 mm x 20 mm x 20 mm. 20 grams of Potassium hydroxide (KOH) serves as a catalyst to help accelerate the process of separating water molecules in electrolysis. The container will be connected to a water trap and then a gas flowmeter or gas measuring instrument. This study shows that designing a wet type HHO gas generator with a pure DC source and a PWM source will have a correlation between HHO gas production and variations of the distance between two electrodes. At a distance of 2 cm the electrode produces HHO gas of >1200 ml with a pure DC source within 15 minutes. For an electrode distance of 4 cm the HHO gas produced is 1200 ml with a pure DC source within 15 minutes. And for an electrode distance of 6 cm the HHO gas produced is 880 ml with a pure DC source within 15 minutes. Meanwhile, at a distance of 2 cm from the electrode with a PWM source of HHO gas, the resulting HHO gas is >1200 ml in 15 minutes. For an electrode distance of 4 cm with a PWM source of HHO gas, 1030 ml is produced in 15 minutes. And for the electrode distance of 6 cm with a PWM source of HHO gas, 690 ml is produced in 15 minutes.Keywords: electrolyzer wet cell, HHO gas, distance of electrodes

PENGARUH LAPISAN HIDROFOBIK PADA PERMUKAAN ISOLATOR POLIETILEN TERHADAP TINGKAT ARUS BOCOR DAN TEGANGAN FLASHOVER PADA VARIASI PAPARAN SINAR ULTRAVIOLET n/a Rizaq; Moch. Dhofir; Teguh Utomo
Jurnal Mahasiswa TEUB Vol. 10 No. 6 (2022)
Publisher : Jurnal Mahasiswa TEUB

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

This study discusses the effect of the hydrophobic layer on the surface of the polyethylene insulator on the leakage current and flashover voltage with variations in exposure to ultraviolet light. This research was conducted by varying the conditions of ultraviolet irradiation on the insulator, test voltage, and also the test conditions in the form of dry and wet conditions. Variations in the duration of ultraviolet irradiation were for 0 hours, 24 hours, and also 48 hours. The insulator used is also divided into 2, an insulator with coating and a non-coating. Initial testing of the contact angle to determine whether the insulator is hydrophobic. Furthermore, distribution simulations and electric field efficiency calculations were carried out using FEMM 4.2 software, so that dielectric strength values could be calculated. After that, leakage current and flashover tests were carried out with voltage variations of 4kV, 8kV, 12kV, 16kV, and 20kV. The results obtained in this study are the greater the value of the test voltage given, the greater the value of the leakage current, while the flashover voltage has an inverse relationship with the leakage current. The greater the leakage current, the smaller the flashover voltage. In insulators with a hydrophobic layer, the value of the leakage current and flashover voltage can be improved. In addition, the addition of the duration of irradiation causes the value of the leakage current to be greater and the flashover to decrease in value.Keywords— insulator, leakage current, flashover, hydrophobic, polyethylene

ANALISIS DAMPAK KANDUNGAN GAS TETRAFLOROETANA TERHADAP KEKUATAN DIELEKTRIK GAS KARBONDIOKSIDA DALAM MEDAN TINGGI DC BATANG-BATANG Bagas Azzanazaki Nurbyantoko; Moch. Dhofir; Lunde Ardhenta
Jurnal Mahasiswa TEUB Vol. 10 No. 6 (2022)
Publisher : Jurnal Mahasiswa TEUB

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

This study describes the effect of tetrafluoroethane gas concentration on the dielectric of carbon dioxide gas in a high field dc rods. This research begins with data collection through breakdown voltage testing at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Universitas Brawijaya. Variations of conditions used in the breakdown voltage test include changes in the concentration of R134 gas in CO2 gas of 0%, 10%, 20%, and 30% which are calculated based on the total pressure of the mixed gas, the variation of the total pressure of the mixed gas is 2000 mBar, 2200 mBar, 2400 mBar, and 2600 mBar, as well as changes in the gap between 2 cm and 1 cm. The test is carried out using high DC voltage. The arrangement of the electrodes used is rods. The results obtained in this study are the influence of the concentration of R134 gas in CO2 gas where the value of the dielectric strength of pure R134 gas is higher than that of contaminated CO2 gas. In addition, variations in the ratio of R134 gas concentration from 0% to 30% and variations in the ratio of total mixed gas pressure from 2000 mBar to 26000 mBar affect the dielectric strength of the mixed gas. Where the greater the value of CO2 gas concentration, the smaller the breakdown voltage value. while the greater the value of the total pressure of the mixed gas, the greater the value of the breakdown voltage. Keywords— Gas Insulator, Tetrafluoroethane, carbondioxide, Breakthrough Voltage, Dielectric Strength.

ANALISIS PENGARUH INJEKSI GAS TETRAFLOROETANA TERHADAP KEKUATAN DIELEKTRIK GAS KARBONDIOKSIDA DALAM MEDAN TINGGI AC NON-HOMOGEN A. Ihsanul Amal; Moch. Dhofir; Rini Nur Hasanah
Jurnal Mahasiswa TEUB Vol. 10 No. 6 (2022)
Publisher : Jurnal Mahasiswa TEUB

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

This study describes the effect of Tetrafluoroethane concentration on the dielectric of Carbondioxide gas in a non-homogen AC high field. This research begins with data collection through breakdown voltage testing at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Universitas Brawijaya. Variations of conditions used in the breakdown voltage test include changes in the concentration of Tetrafluoroethane into Carbondioxide gas of 0%, 10%, 20%, and 30% which are calculated based on the total pressure of the mixed gas, the variation of the total pressure of the mixed gas is 2000 mBar, 2200 mBar, 2400 mBar, and 2600 mBar, as well as changes in the gap between 1.5 cm and 3 cm. The test is carried out using high voltage AC. The arrangement of the electrodes used is a needle - plate. The results obtained in this study are the influence of the concentration of R134 into CO₂ gas where the value of the dielectric strength of pure CO₂ gas is lower than that of contaminated CO₂ gas, in this case R134 is the impurity. In addition, variations in the concentration ratio of R134 from 0% to 30% and variations in the ratio of total mixed gas pressure from 2000 mBar to 2600 mBar affect the dielectric strength of the mixed gas. Where the greater the concentration value of R134, the greater the breakdown voltage value and the greater the total pressure value of the mixed gas, the greater the breakdown voltage value. Index terms—Gas Insulator, Carbondioxide, Tetrafluorethane, Breakdown Voltage, Dielectric Streng

ANALISIS PENGARUH KANDUNGAN GAS TETRAFLOROETANA TERHADAP KEKUATAN DIELEKTRIK GAS KARBONDIOKSIDA DALAM MEDAN TINGGI DC NON-HOMOGEN Ivan Aditya Chrissanto; Moch. Dhofir; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 1 (2023)
Publisher : Jurnal Mahasiswa TEUB

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

This study discusses the effect of the gas concentration of tetrafluoroethane (R-134) on the dielectric of carbondioxide gas (CO2) in a non-homogeneous DC high field. The influence analyzed is the dielectric strength. This research was carried out using variations in the condition of changes in the concentration of R-134 gas, the total pressure of the mixed gas, and the distance between the electrodes. Variations in the concentration of R-134 gas in carbondioxide gas are 0%, 10%, 20%, and 30% which are calculated based on the total pressure of the mixed gas. The variations in the total pressure of the mixed gas are 2000 mBar, 2200 mBar, 2400 mBar, and 2600 mBar. The variation of the gap between the two electrodes is 1,5 cm and 3 cm. Furthermore, distribution simulations and calculations of electric field efficiency were carried out using FEMM 4.2 software, so that the dielectric strength values could be calculated. The results obtained in this study are the greater the concentration of gas R-134 given, the higher the value of the dielectric strength. At the same concentration of R-134 gas, an increase in the total pressure of the mixed gas and the value of the gap also causes an increase in the value of the dielectric strength.Keywords: dielectric strength, gas insulator, carbondioxide, tetrafluoroethane

PENGARUH VARIASI SIRIP ISOLATOR POLYETHYLENE TERHADAP TINGKAT ARUS BOCOR DAN TEGANGAN FLASHOVER PADA KONDISI KERING DAN BASAH Fransiskus X. H. Keraf; Moch. Dhofir; Lunde Ardhenta
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
Publisher : Jurnal Mahasiswa TEUB

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

This study describes the effect of variations in the sleeve fins on polyethylene insulators on the level of leakage current and flashover voltage in dry and wet conditions. This research begins with data collection by testing the leakage current and breakdown voltage at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Universitas Brawijaya. The various conditions used in testing the leakage current and flashover voltage include dry conditions and wet conditions with different wetting rates, namely 10 mL/s, 30 mL/s, and 60 mL/s. Tests were carried out using high AC voltage on three types of insulators, namely type A, type B, and type C. The arrangement of the electrodes used was rods. The results obtained in this study are the influence of the variation of the fin arm on the level of leakage current and flashover voltage. Where the insulator that has the lowest level of leakage current is the type B insulator with the size of the upper fin which is longer than the lower fin. This is influenced by the upper fin of the insulator which resembles a hood, which when wet conditions cause the water not to completely hit the lower fin. Where the greater the value of the wetting discharge, the greater the value of the leakage current and the greater the surface resistance and power losses. This type B isolator has the best resistance because it also experiences flashover at the highest test voltage level. Index terms : Polyethylene Insulator, Leakage Current, Wetting Discharge, Flashover Voltage

PERANCANGAN DAN STUDI KELAYAKAN PEMBANGKIT LISTRIK TENAGA SURYA (PLTS) ROOFTOP PADA HOTEL GRAND DAFAM YOGYAKARTA Mohammad Fathurrahman Surya Pratama; Moch. Dhofir; Lunde Ardhenta
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
Publisher : Jurnal Mahasiswa TEUB

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

This research discusses about the design of an on-grid PLTS system on the rooftop of Hotel Grand Dafam Yogyakarta. For designing PLTS design, researchers used a simulation software called HelioScope, based on design, 140 monocrystalline panels placed with optimal azimuth angle of 25,78o and a tilt of 10o , 2 inverter with a capacity 50kW, 1 smart meter, and other support components of PLTS system. From the economic analysis is gained for initial investment required for this PLTS system is Rp965.859.193,64 with operational and maintenance cost on each year is Rp14.487.887,90, and Cost of Energy (COE) isRp0.858/kWh. The result for feasibilty analysis of rooftop PLTS for Net Present Value (NPV) is Rp4.305.724.376,35 with Internal Rate of Return 17,46% and BCR rate 5,457, Because these three aspects are positive, it can be concluded that this PLTS system investment is feasible to realized. Keywords : PLTS Rooftop, On – Grid System, HelioScope, Feasibility Analysis

ANALISIS NILAI SETTING RELE DIFERENSIAL SEBAGAI PROTEKSI TRANSFORMATOR ADD ON BLOK 2 DI PT PJB UP MUARA TAWAR MENGGUNAKAN ETAP Muhammad Fadhli Dzil Ikram; Moch. Dhofir; Teguh Utomo
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
Publisher : Jurnal Mahasiswa TEUB

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

This research discusses about the analysis of differential relay transformer setting as a protection for Add On transformer in PT PJB UP Muara Tawar at block 2 using Etap 19.01 simulation method and mathematical calculation according to IEEE Std 242-2001. Furthermore, to test the results of the setting calculations, a short circuit current calculation that occurs in the area in the protection zone and outside the protection zone is also carried out using the ETAP 19.01 simulation software. Based on the results of mathematical calculations and software simulations, the value of the short circuit current that occurs is 74346 A for 3-phase short-circuit, 58691 A for 2-phase short-circuit, and 67607 A for 1-phase short-circuit to ground in the primary area. And in the secondary area is 1630 A for 3 phase short circuit fault, 1376 A for 2 phase short circuit fault, and 67607 A for 1 phase short circuitfault to ground. Furthermore, the calculation results for the setting current and the differential are 0.313 A or 0.3 pu, along with a slope 1 value of 45.58% and slope 2 of 91.17%. Based on these results it can be concluded that the differential relay settings on the Add On transformer meet the established standards. Keywords : Differential Relay Transformer (87T), Etap, setting analysis

ANALISIS KONDISI TRANSFORMATOR UTAMA PT. PLN (PERSERO) UPK TARAHAN LAMPUNG BERDASARKAN HASIL UJI DGA (DISSOLVED GAS ANALYSIS) Bagus Ramadhan; Moch. Dhofir; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
Publisher : Jurnal Mahasiswa TEUB

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

According to SLD Sumatera data, UIP3BS has three load control sub-systems, namely UPB Southern Sumatera, UPB Central Sumatera, and UPB Northern Sumatera with a total of 202 substations and transformers totaling 402 units / 22.594 MVA. Based on these data, it shows the importance of the role of the transformer so it is very necessary to know the condition of the transformer and take appropriate maintenance action against the transformer is very necessary. Therefore, this study aims to assess the condition of the main transformer transformer in unit 4 at PT PLN (Persero) UPK Tarahan Lampung based on the results of DGA (Dissolved Gas Analysis) testing. DGA testing serves to provide information related to the condition of the transformer so that it can take appropriate maintenance actions. In this study, several processes were carried out, namely by taking data from DGA test results in the form of gas value levels of H2, CH4, CO, CO2, C2H4, C2H6, C2H2 dissolved in main transformer oil in unit 4 at PT PLN(Persero) UPK Tarahan. Then analyze the DGA test results using the TDCG method and the Duval's Triangle method. Based on the results of the analysis using the TDCG and Duval Triangle methods, the condition of the main transformer at unit 4 PT. PLN(Persero) UPK Tarahan Lampung in normal conditions. This is also supported by the TDCG value which is well below 720 ppm. Therefore, this condition is still within the permissible limits for the main transformer unit 4 of PT PLN (Persero) UPK to operatenormally. Keyword: DGA, Duval’s Triangle, fault gas, TDCG, transformer DAFTAR PUSTAKA[1] Demmassabu, A. R., L. S. Patras., dan F. Lisi. (2014). Analisa Kegagalan Transformator Daya Berdasarkan Hasil Uji DGA dengan Metode TDCG, Key Gas, Roger’s Ratio, Duval’s Triangle pada Gardu Induk. J. Teknik Elektro dan Komputer. 3(4) 1─10.[2] Faishal, M. A. R., Karnoto., dan T. Sukmadi. (2011). Analisis Indikasi Kegagalan Transformator dengan Metode Dissolved Gas Analysis. J. Transmisi. 3(13). 1─10.[3] IEC 60599. (2015). Mineral oilimpregnated electrical equipment in service: Guide to the interpretation of dissolved and free gases analysis. Geneva: IEC.[4] IEEE C57.104. (2019). International Standard – Guide for the Interpretation of Gases Generated in Mineral OilImmersed Transformers. IEEE - 2019. Piscataway: IEEE.[5] Kelman TRANSFIX Multiple Gas Transformer DGA. https://www.gegridsolutions.com/md/catalog/transfix.htm. (diakses 10 Oktober 2022).[6] Kementrian Energi dan Sumber Daya Mineral (ESDM). https://www.esdm.go.id/en/beritaunit/directorate-general-ofelectricity/kuartal-iii-2021-konsumsi-listrik-per-kapitameningkat-capai-1109-kwh. (diakses 12 September 2022).[7] Naibaho, N. (2017). Analisis Kegagalan Transformator Berdasarkan Hasil Pengujian DGA. J. SINERGI. 98─106.[8] PT. PLN (Persero), 2014. Buku Pedoman Pemeliharaan Transformator Daya. Jakarta: PT PLN (Persero).[9] PT. PLN (Persero). Singgle Line Diagram UIP3BS 2021. (diakses 15 Oktober 2022).[10] Yudhapraja, S., dan A.S. Prayogi. (2020). Analisa Gejala Kerusakan Transformator Berdasarkan Dissolved Gas AnalysisPembangkit PLTA Way Besai. J. NCIET. 1(1): 13─23.[11] Zope, N., Ali, S. I., Padnamaban, S., Bhaskar, M. S., dan Popa, L. M. (2018). Analysis of 132kV/33kV 15MVA Power TransformerDissolved Gas Using Transport-X Kelman Kit Through Duval’s Triangel and Roger’s Ratio Prediction. 2018 IEEE International Conference on Industrial Technology (ICIT). 1160-1164.

Title

Found 16 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 16 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 16 Documents
Search