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ANALISIS PENGARUH PENAMBAHAN CAPACITOR BANK DAN DETUNED REACTOR TERHADAP FAKTOR DAYA DAN HARMONISA PADA SISTEM DISTRIBUSI CONVENTION HALL GRAND INDONESIA Diwirya, Raihandika Putra Kusuma; Dhofir, Moch.; Wijono, n/a
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Sektor industri menggunakan energi listrik yang sangat besar dan pada umumnya memiliki beban-beban induktif yang menyerap daya aktif dan daya reaktif yang cukup besar. Beban-beban induktif seperti motor, trasnfomer dan las listrik memiliki komponen induktor untuk magnetisasi. Magnetisasi akan menyerap daya reaktif yang akan menyebabkan peningkatan pada rugi-rugi energi sehingga faktor daya menurun pada sistem jaringan. Maka dari itu capacitor bank sering digunakan untuk memperbaikifactor daya. Namun, penggunaan capacitor bank pada jaringan yang mengandung harmonisa, dapat menyebabkan kenaikan nilai harmonisa akibat fenomena resonansi paralel yang terjadi. Sehingga detuned reactor sering digunakan untuk mencegah kenaikan harmonisa akibat penggunaan capacitor bank. Pada penelitian ini akan dilakukan analisis penambahan capacitor bank dan detuned reactor pada jaringan Convention Hall Grand Indonesia dengan metode pemasangan global compensation dan group compensation. Pada hasil penelitian ini, Saat capacitor bank capacitor bank terpasang faktor daya jaringan dapat diperbaiki baik menggunakan metode pemasangan global compensation dan group compensation mencapai nilai 95%. Penggunaan capacitor bank pada jaringan memberikan dampak kenaikan harmonisa pada jaringan dengan rata-rata kenaikan pada setiap panel mencapai 83% pada pemasangan menggunakan metode global compensation dan 136% pada saat pemasangan capactior bank menggunakan metode group compensation. Detuned reactor ditambahkan pada jaringan dengan dipasang seri terhadap kapasitor. Hasil penelitian ini menunjukkan baik dengan metode pemasangan global compensationataupun group compensation kenaikan harmonisa jaringan dapat dihindari dan bahkan dapat diredam. Hasil akhir nilai harmonisa jaringan mengalami rata-rata penurunan pada setiap panel mencapai 51% terhadap nilai harmonisa pada kondisi eksisting pada saat menggunakan metode pemasangan global compensation dan 47% saat pemasangan dengan metode group compensation. Kata kunci— Faktor Daya, Harmonisa, Capcitor Bank, Detuned Reactor
PERANCANGAN PEMBANGKIT LISTRIK TENAGA SURYA (PLTS) ATAP SEKOLAH CITA BUANA SEBAGAI PENGEMBANGAN NEARLY ZERO ENERGY BUILDING (NZEB) Ariella, Syafika Safa; Dhofir, Moch.; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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The development of EBT in Indonesia is still far from the target of the National Energy Policy (KEN), namely the EBT mix of 23% in 2025 and 31% in 2050. One form of EBT development is utilizing solar energy in building technology that has high energy efficiency so that the number of electrical energy consumption is close to zero or called nearly Zero Energy Building (nZEB). Therefore, it is necessary to design the most optimal rooftop solar power plant (PLTS) so that it has good energy production and economic feasibility. To get good energy production, a simulation is carried out using HelioScope software by inputting data on the mechanical and electrical segments so that the amount of energy that can be produced by the rooftop solar power plant is obtained in detail. The results of the simulation of the rooftop solar power plant system that is installed on-grid in HelioScope are composed of 96 monocrystalline solar panels of Trina Solar TSM-DE20-605W (605W) and 3 3-phase inverters of Growatt MID 17KTL-X. The rooftop solar power plant produces an annual production of 84,08 MWh with a performance ratio of 82,1%. Thus, the average percentage of energy supply from rooftop solar power plants is 39,82% or can be said to be good in supplying the electrical energy needs of buildings so that the nZEB can be developed. From the simulation results, the economic feasibility is known, with the Break Even Point (BEP) reached in 12,4 years of the 25 years project period, and the Net Present Value (NPV) and Return on Investment (RoI) are positive, indicating that the rooftop solar power plant is profitable and feasible to develop. Keywords: Rooftop Solar Power Plant, HelioScope, nearly Zero Energy Building, Feasibility Study
ANALISIS NILAI SETTING POINT RELE DIFERENSIAL SEBAGAI PROTEKSI TRANSFORMATOR GT UNIT 1 DI PT PLN NUSANTARA POWER UP PAITON Fatahillah, Muhammad; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Power plants are an important component in a country's electricity system which is responsible for producing large amounts of electrical energy to meet the needs of society, industry and other sectors. There are many types of power plants in Indonesia, one of which is the Steam Power Plant (PLTU). In a PLTU there are electrical components that must be safe when a disturbance occurs. The power transformer is one of the vital electrical components in a PLTU which requires a good protection system so that it can operate optimally. PT PLN Nusantara Power UP Paiton Unit 1 has many power transformers installed, one type of which is the GT Transformer. This transformer works to increase the voltage from 18.25 kV to a voltage of 500 kV. On the GT transformer, there is also one of the protection relays installed, namely the differential relay. However, the existence of the installed differential relay needs to be evaluated, namely not only with mathematical calculations but also with ETAP simulations. In this research, mathematical analysis was carried out by calculating the setting point value and slope range of the differential relay on the GT transformer. After that, a simulation was carried out using ETAP. Based on the results of mathematical analysis and simulation, it shows the consistency of short circuit current values, namely with an average error difference of 1,25% for the primary side and 1.183% for the secondary side. Meanwhile, there are differences in the slope values determined by PLN Nusantara Power and the results of mathematical calculations, namely 9.06% for slope 1 and 18.138% for slope 2 based on mathematical calculations and 20% for slope 1 and 80% for slope 2 based on party settings. PLN Nusantara Power. This difference is caused by consideration of the potential for saturation in the Current Transformer due to excessive loading on the secondary side. This CT saturation condition cannot be detected as a disturbance, so it must be located in the no-trip area. Then, the setting current value based on mathematical calculations and PLN Nusantara Power's settings is also not at 0 A. This is due to consideration of the differential relay sensitivity of 30% which causes the setting current value to be around 0.3 A. Finally, in the curve plot Differential relay characteristics, the average fault point is in the trip area except for 3 phase and secondary side interphase faults which are above the trip area or called instantaneous area. The location of the fault point in this instantaneous area is influenced by the large 3-phase short circuit current value on the GITET side so that it accumulates on the 500 kV bus (secondary side). Keywords— Power Transformer, Differential Relay, Setting Point, ETAP, Characteristic Curve
EVALUASI KELAYAKAN KINERJA PEMUTUS TENAGA (PMT) 70 kV PADA BAY ARJAWINANGUN 1 DI GARDU INDUK SUNYARAGI Yuka, Helmi Dwi; Utomo, Teguh; Dhofir, Moch.
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Power Breakers (PMT) are one of the important equipment in the electricity system at the main substation. Damage to the PMT is very dangerous and disrupts the operation of the system, so periodic testing must be carried out to ensure that the PMT is suitable for operation. Tests on PMT are insulation resistance testing, contact resistance testing, grounding resistance testing, contact simultaneity testing, and SF6 gas testing. This research aims to evaluate whether the PMT in the Arjawinangun 1 bay at the Sunyaragi Main Substation is still effective and safe to operate, namely by using analysis of a set of data taken based on the values produced by routine testing or maintenance. This research was carried out by comparing the test results obtained with the standard values for each test. The insulation resistance test results obtained for each phase have values above 70 MΩ. The results of contact resistance testing carried out on each phase have values below 50 µΩ. The results of the grounding resistance test on each phase have a value below 1Ω. In the simultaneity test, the delta time calculation results obtained for both open and close times were each below 10 ms. The results of SF6 gas purity testing have a purity value above 99%. Based on the results of testing for insulation resistance, contact resistance, grounding resistance, contact simultaneity and SF6 gas purity, the PMT installed in Arjawinangun 1 bay is still in a safe condition and suitable for operation because it complies with standards. Keywords—Power Breaker (PMT), Insulation Resistance, Contact Resistance, Grounding Resistance, Contact Simultaneity, SF6 Gas Purity
PENGARUH PENAMBAHAN CAMPURAN ARANG LIMBAH KULIT PISANG DAN FLY ASH TERHADAP PENURUNAN NILAI RESISTANSI PERTANAHAN ROD GROUNDING Jagad, Mohammad Wahyu; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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One of the efforts that can be made to reduce the value of soil resistance is by providing soil treatment. The most ideal soil treatment is done in the nearest area to the grounding electrode. Soil treatment can be carried out by adding other substances to the soil to engineer soil conditions and reduce the value of soil resistance. This study aims to examine the effect of a mixture of banana peel waste charcoal and fly ash on the reduction of soil resistance values. Banana peel charcoal contains activated carbon that can maintain soil moisture, while fly ash is a residue from coal combustion that contains electrolyte compounds. The homogeneously engineered mixture of banana peel waste charcoal and fly ash has a resistivity of 385.76 Ω-cm. Testing was conducted with three variations of the mixture composition: banana peel charcoal 75% and fly ash 25%, banana peel charcoal 50% and fly ash 50%, and banana peel charcoal 25% and fly ash 75%, with a constant insertion depth of 0.7 meters and a diameter of 0.15 meters. The first mixture successfully reduced soil resistance by 46.1 Ω, or a reduction of 52.77%. The second mixture successfully reduced soil resistance by 40.27 Ω, or a reduction of 46.57%. The third mixture successfully reduced soil resistance by 27.3 Ω, or a reduction of 31.34%. Moisture engineering was carried out by adding 300 ml of water, resulting in a reductionranging from 9.33% to 23.90%. Keywords: Banana peel charcoal, Fly ash, Soil resistance, Soil resistivity, Soil treatment,
ANALISIS KONDISI TRANSFORMATOR DENGAN PENGUJIAN GAS TERLARUT PADA PT. PLN INDONESIA POWER GRATI PGU Imtiyaz, Kholis; Wibawa, Unggul; Dhofir, Moch.
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Abstract - Transformers have an important role in the transmission and distribution of electricity, therefore the reliability of the transformer must be maintained, especially the insulating oil, in the process the insulating oil will produce dissolved gases and this can be called fault gas, fault gas can be analyzed using DGA (Dissolved Gas Analysis) , so that it can show the diagnosis of the transformer. In the flow of this research method, first a literature study will be carried out from three main sources, namely : journals, scientific articles and e-books, especially related to dissolved gas or DGA (Dissolved Gas Analysis), then data will be taken from transformer 2.1 at PT. PLN Indonesia Power Grati PGU, where the data taken is related to the results of the DGA (Dissolved Gas Analysis) test, and the data will be analyzed using the Roger's Ratio and Duval Triangle methods The results of the influence of the long operating time have an impact on changes in several gases which have increased beyond the maximum limit, such as CO (Carbon Monoxide) and CO2 (Carbon Dioxide), and from the results of the analysis of the Roger' Ratio and Duval Triangle methods, it is known to have several different results, for the Roger' Ratio method has normal unit results, low temperature thermal, and low energy density arcing-pd and the Duval Triangle has partial discharge results, but in this test method there are also results that cannot be detected using the Duval Triangle method, these two methods have several differences related to the conditions of each method that have been tested using the same data, the differences in condition indications do not mean that one method is superior to another method, but the differences in condition indications strengthen the results of the previous method's indications so that the methods are used to reinforce each other because these methods also use different processing methods. Keywords —Transformer, Fault Gas, DGA (Dissolved Gas Analysis), Duval Triangle, Roger' Ratio
ANALISIS INDIKASI KEGAGALAN TRANSFORMATOR DENGAN DATA PENGUJIAN DISSOLVED GAS ANALYSIS DI PT. PLN INDONESIA POWER GRATI PGU Prasetyo, Achmad Ari Dwi; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Problems that usually happen in power transformers are failure phenomena, both thermal failure and electrical failure. One example of this failure is overheating caused by several factors such as overloading, hysteresis losses, eddy currents, etc. Excessive heat will stimulate a reaction which will cause a decrease in the quality of the insulating oil in the transformer oil. Apart from that, there is fault gas in the oil content which causes damage to the transformer. Based on these problems, in this research the condition of the transformer and proper maintenance measures are needed. Therefore, this research is very important as a form of prevention effort so that the transformer does not suffer damage. So it is needed to test and analyze the amount of gas dissolved in transformer oil or what is called DGA (Dissolved Gas Analysis) testing. This research discusses indications of failure in unit transformator (GT) 2.2-2.3 at PT. PLN Indonesia Power Grati PGU with monitoring of fault gas H2, CH4, C2H2, C2H4, C2H6, CO, and CO2. The methods used in DGA testing are the TDCG (Total Dissolved Combustible Gas), Roger's Ratio, and Duval's Triangle methods which refer to standards IEEE C57.104 (2008) and IEC 60599 (2015). Health conditions of transformer units 2.2-2.3 in Indonesia. PLN Indonesia Power Grati PGU indicates a thermal disturbance. In this case, overheating occurs, one of which is caused by a partial discharge in the transformer. However, this is still within the permitted limits for 2.2-2.3 transformer units to operate. However, it is necessary to carry out further monitoring of the increase in the value of each gas fault. The maintenance action that must be taken is replacing the transformer oil if one of the combustible gas, namely H2, CH4, C2H2, C2H4, and C2H6 is in condition status 4 for the TDCG method, in case 5 for the Roger's Ratio method, and in the symbols T3 and DT for the Duval Triangle method. This needs to be done as a form of prevention effort so that the transformer does not breakdown. Keyword: DGA, fault gas, failure phenomena, DGA test method
IDENTIFIKASI PENYEBAB DAN TEKNIK PENURUNAN SUSUT ENERGI LISTRIK MENGGUNAKAN METODE FAILURE MODE END EFFECT ANALYSIS PADA PT PLN (PERSERO) ULP KANGEAN MADURA Gumintang, Adnan; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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PT PLN (Persero) is one of the state-owned enterprises responsible for managing electricity in Indonesia. PLN playsa crucial role in providing electricity services to the community through generation, distribution, and sales. At PT PLN(Persero) ULP Kangean, there are 33,737 customers with a connected load of 2,278,050 VA. However, there is adiscrepancy between the amount of energy sold and the amount of energy issued during this period. Two maincomponents, namely technical and non-technical components, are the two factors behind this energy loss. The FailureMode and Effect Analysis (FMEA) method is used in this study to identify the causes of electrical energy loss. Dataanalysis conducted from January to September 2022 shows that the Low Voltage Network (JTR) is the main cause ofelectrical energy loss at PT PLN (Persero) ULP Kangean. There are several failures in the JTR, where damage to theelectrical conductors is one of the contributors to the highest Residual Risk Priority Number (RPN), namely 23.1 or31.37%. This error is a major concern in efforts to repair and control energy loss. This study provides valuable insightsinto the main sources of energy loss at PT PLN (Persero) ULP Kangean, and enables the implementation of more preciseand efficient actions to improve the efficiency of electricity distribution and address failures that can cause energy loss. Keywords — Electrical Energy Shrinkage; PT PLN (Persero) ULP Kangean; FMEA; JTR; distribution cable
ANALISIS KONDISI MINYAK TRANSFORMATOR DENGAN UJI DISSOLVED GAS ANALYSIS (DGA) DAN BREAKDOWN VOLTAGE PADA PT PLN NUSANTARA POWER UP MUARA KARANG Badriyah, Intan Layla; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Transformer oil is one of the important components in a transformer. In transformers, oil functions as an insulating material andalso acts as a coolant. Transformer oil will have loads in the form of electric fields and thermal loads when the transformer isoperating. The load on the oil causes the temperature of the oil to increase, so that the value of the breakdown voltage decreases and the quality of the oil decreases. Apart from that, this load also causes gases to be contained in the oil. The presence of gases in transformer oil indicates that there is an indication of interference which will result in a decrease in the quality of the insulation. A decrease in insulation quality can cause transformer failure. In this research, the tests carried out were the Dissolved Gas Analysis (DGA) test to determine the gas contents and the Breakdown Voltage test for the breakdown voltage value. Tests on transformer oil were carried out at PT PLN Nusantara Power UP Muara Karang. The results of the research show that based on DGA testing, the faulty transformer has indications of thermal disturbances accompanied by electric arc splitting and damage to the paper insulation, while active transformers have indications of thermal disturbances accompanied by damage to the paper insulation. Based on the breakdown voltage test, the faulty transformer and the active transformer are in normal condition because they are below the standard value (40 kV/2.5 mm). Keywords: Transformer oil, insulation quality, gas content, breakdown voltage
PENGARUH LAPISAN HIDROFOBIK PADA PERMUKAAN ISOLATOR KERAMIK TIPE POST TERHADAP TINGKAT ARUS BOCOR PADA KONDISI KERING DAN BASAH Wijaya, Rizki Adi; Dhofir, Moch.; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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In this research will be explained about the effect of silicon rubber coating on ceramic insulators type post on leak current levels in dry and wet conditions. The research method used is to collect data through testing leakage current and contact angle at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Brawijaya University and simulating the electric field distribution in Ceramic Insulator Type Post with FEMM 4.2 software. The tests were conducted using high voltage AC with variations of voltage tests of 4.8,12,16,20, and 25 kV. The results obtained in this research are that the largest electric field is near the voltage area. Then we get a contact angle of more than 90° or is hydrophobic when coated with silicon rubber, whereas the surface of the insulator which is not coated with silicone rubber has a contact angle of less than 30° or is hydrophilic, and there is an effect of the silicon rubber layer on the leakage current level, namely the greater the wetting discharge value and test voltage, the greater the leakage current value and the greater the surface resistance value. and electrical power losses Keywords: ceramic insulator,post type, contact angle, leakage current, field intensity, hydrophobic
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