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ANALISIS UJI KAPASITAS DAN EFISIENSI BATERAI 220 VDC MELALUI PROSES DISCHARGING PADA PLTGU BLOK 2 UP MUARA KARANG Nisa, Rizqa Ulya Fakhrun; Wibawa, Unggul; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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PLTGU Muara Karang merupakan salah satu pembangkit listrik yang bertugas menyuplai wilayah Jakarta dan beberapa objek vital negara. Blackout menjadi salah satu permasalahan besar dalam pembangkitan listrik karena dapat mengganggu aktivitas masyarakat. Blackout yang terjadi karena trip pada peralatan pembangkit. Untuk mencegah blackout, PLTGU mengandalkan dua sistem darurat sebagai suplai ketika terjadi trip. Salah satunya adalah baterai sebagai suplai darurat peralatan DC. Kondisi baterai harus dijaga dengan melakukan pemeliharaan rutin melalui pengukuran tegangan, suhu, dan berat jenis. Kondisi dan keandalan baterai juga dapat ditentukan berdasarkan besar kapasitas dan efisiensinya. Kapasitas dan efisiensi dapat diketahui dengan uji kapasitas melalui proses charge dan discharge. Penelitian ini bertujuan untuk mengetahui kondisi suhu dan tegangan serta menghitung kapasitas dan efisiensi baterai. Metode penelitian ini adalah metode kuantitatif dengan teknik pengambilan data melalui dokumentasi. Data yang digunakan adalah data sekunder suhu dan tegangan baterai GT 2.2 pada saat sebelum, selama, dan sesudah pengosongan. Objek penelitian ini adalah 1 bank baterai (104 sel baterai) jenis lead acid pada GT 2.2 PLTGU Blok 2 UP Muara Karang. Hasil penelitian didapatkan (1) baterai sebelum pengosongan dalam kondisi kurang baik sehingga perlu pengisian kembali, (2) suhu tiaptiap sel baterai selama proses pengosongan terus meningkat tidak beraturan, (3) tegangan tiap-tiap sel baterai selama proses pengosongan mengalami penurunan secara linier, (4) kapasitas dan efisiensi baterai memberikan pola hubungan berbanding lurus. Kata kunci– Baterai Lead Acid, Pengosongan, Uji Kapasitas
PENGARUH SUDUT INKLINASI DAN JENIS BAHAN TERHADAP DAYA KELUARAN DAN EFISIENSI MODUL SURYA SKALA MIKRO DENGAN DUA REFLEKTOR Nurhakiki, Mauludiya Annisa; Wibawa, Unggul; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Two sided reflectors are reflectors that face each other with the function of focusing sunlight so that they fall directly on the solar module. The usage of two reflector units is intended to make the output power and efficiency of the module higher than if using a single-sided reflector but not to cover the incident light area like using a three or four-sided reflectors. The inclination angles used were 30˚, 45˚, 60˚, 75˚, and 90˚ with reflector materials such as glass mirror, aluminum, and HVS paper. The results showed that the initial peak power and efficiency were 14.33W and 6.62%. The peak power and efficiency using a mirror reflector were 19.27W and 8.97% when the inclination angle was 60˚. The peak power and efficiency using the aluminum reflector were 18.59W and 8.67% when the inclination angle was 60˚. The peak power and efficiency using the HVS reflector were 15.23W and 7.10% at an inclination angle of 60˚. In addition, temperature and load levels relationship curves were also obtained for the operation of the 20WP micro-scale solar module. It can be deducted that the addition of double-sided mirror and aluminum reflectors with inclination angle of 60˚ increases the output power and efficiency of the solar module significantly and no special pattern is formed between temperature and load levels of the circuit for the various treatments tested. Keyword : solar module, inclination angle, reflector, output power, efficiency
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 KEANDALAN SISTEM JARINGAN DISTRIBUSI 20 KV DENGAN METODE FAILURE MODE EFFECT ANALYSIS DI PT PLN (PERSERO) ULP SUMBERPUCUNG PADA PENYULANG KALIPARE Hakim, Lukmanul; Utomo, Teguh; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Electrical energy is generated from a plant and will be transmitted and distributed to be channeled to homes and consumed bycustomers. PT. PLN (Persero) or abbreviation of PT. Perusahaan Listrik Negara (Persero) is a state-owned company that movesand controls electricity starting from generation, transmission, and distribution to be distributed to homes and consumed bycustomers. ULP Sumberpucung or abbreviation of Sumberpucung Customer Service Unit is a sub-unit of UP3 Malang that isresponsible for customer service and overcoming electricity distribution problems with a smaller area. The calculation analysis ofthe 20 kV distribution network reliability system is a calculation analysis to find the values of SAIDI, SAIFI, and CAIDI. Thecalculation analysis carried out can use several methods, one of which is the FMEA (Failure Mode Effect Analysis) method. TheFMEA method is used to find the final results of SAIDI, SAIFI, and CAIDI values by identifying components that experienceinterference. The parameters used to determine the reliability index value with the manual calculation of the FMEA method include the failure rate of SPLN equipment, channel length, failure rate of each channel, repair time according to SPLN, repair rate, and the number of customers per distribution substation. The reliability index value can also be performed comparative analysis using ETAP 19.0.1 software. Analysis using ETAP software uses several parameters such as active failure rate, switching time, number of customers per load point, duration of component repair, and cable length. In addition, the results of the SAIDI value can be used to find the value of economic losses received by PLN in the event of a disturbance. The results of the analysis of manual calculations of the FMEA method and analysis on ETAP 19.0.1 software on the Kalipare Feeder at PT. PLN (Persero) ULPSumberpucung shows reliable results because the reliability index value is still below the provisions of SPLN No. 59 of 1985. Keywords: FMEA, ETAP, Interference Identification, Energy Not Supplied, Economic Value
ANALISIS DESAIN PEMBANGUNAN PLTS TERAPUNG DI DANAU TOBA: STUDI PADA ASPEK TEKNIK, EKONOMI, DAN LINGKUNGAN Nainggolan, William Sutan; Wibawa, Unggul; Wijono, n/a
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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High level of solar radiation throughout the year makes solar photovoltaic systems (PV) as one of the options for clean energysources in Indonesia. Indonesia possesses significant potential for utilizing floating solar plants, given its 3.091 water resources. Lake Toba, situated in the North Sumatra province, stands as Indonesia's largest lake, covering an expansive area of 1.145 km2. With solar irradiation levels reaching 1757,1 kWh/m2/yr, the lake presents promising potential as a suitable location for floating solar plant installations. The study focused on the technical design of floating solar power plants, covering electrical components and civil structures like floaters, anchors, and moorings. Two scenarios were analyzed to determine plant capacity: maximum water surface area and peak load data of North Sumatra. Inverter capacity was restricted by a ratio of 1,15 to 1,25. Graphical simulations using Matlab software were conducted to assess PV module generation characteristics at various solar radiation levels. Economic analysis included Cost of Energy, Net Present Value, Profitability Index, and Payback Period over a 30-year project lifetime. Environmental analysis addressed GHG emissions reduction assuming a 1% yearly power depreciation. This study outlines the technical design for the Lake Toba floating solar plant with a capacity of 583 MWp covering 3,57 km2 water surface. The plant uses 988.080 PV modules 590 Wp and 48 inverters 10.000 kW, mounted on HDPE floaters with a taut mooring system. Estimated energy production stands at 854 GWh/year. Economic analysis reveals a positive NPV of Rp 5.8 trillion, PI exceeding 1 at 1.774, and a Payback Period of 9 years and 9 months, demonstrating the feasibility of constructing the 583 MW Lake Toba Floating Solar Plant. Environmental analysis indicates a reduction in GHG emissions on Sumatra Island by 18.68 kilotons of CO2 over the project's lifetime. Keywords: floating solar plant, renewable energy, economic analysis, environment analysis, Lake Toba
KARAKTERISTIK PERUBAHAN POLA TEGANGAN DAN ARUS PEMBEBANAN MODUL SURYA DENGAN REFLEKTOR ALUMINIUM PADA SUDUT INKLINASI YANG BERVARIASI Syarif, Habib; Wibawa, Unggul; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Electricity is considered a vital energy source that is inseparable from the lives of communities, companies, and industries. This is evidenced by the significant increase in demand in Indonesia. Due to the increasing demand for energy, there is a need to transition to renewable energy. Indonesia has a potential of 442 GW of renewable energy, with the largest potential being solar energy at 207.8 GWp. Solar energy can be converted into electrical energy using solar modules. However, the efficiency of solar modules needs to be considered and improved, for example by installing reflectors positioned at an appropriate angle of inclination. The research method used was an experiment involving the installation of aluminum reflectors and variations in inclination angles. The reflectors were installed on one side or both sides, while the inclination angles varied between 30°, 45°, 60°, 75°, and 90°. The solar module used was a 20WP polycrystalline type connected to 13 units of 1.5-Watt DC LED lamps, each with its own switch. Voltage, current, and output power data are presented in line graphs, which yield regression equations that facilitate data analysis. The research findings consist of voltage, current, sunlight intensity, and temperature data provided in a table. The obtained data was analyzed to produce other quantities such as output power and input radiation. Voltage, current, and output power data are presented in line graphs, which yield regression equations that facilitate data analysis. Additionally, the top ten output power data will be displayed in a bar graph. The operation of installing a reflector has a significant impact on the voltage and current values at inclination angles of 60˚ and 75˚. The highest output power is achieved when using two aluminum reflectors, an inclination angle of 60˚, and a load of 19.5 Watt. Keywords: solar module, voltage, current, reflector, output power.
PERBAIKAN SUSUT DAYA DAN JATUH TEGANGAN JARINGAN DISTRIBUSI 20KV PADA PENYULANG INTAKO PORONG SIDOARJO Rohman, Deny Fatkhur; Wibawa, Unggul; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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Electrical energy is required for almost all activities in life, including government, industry, business and households. Therefore, it can be said that electricity is the mainstay of human life. People expect the availability of reliable and efficient electrical power for their daily lives. To meet this demand, a reliable and efficient electric power distribution system is required. However, creating a fully reliable and efficient distribution system in the field is really difficult. It can be said that power losses will definitely occur in the distribution system. PT PLN (Persero) as a supplier of electrical energy and the people or organizations that use it will certainly experience losses due to the power losses that occur. One of the most common methods of calculating power losses is to do it manually, but this method takes longer and produces less efficient results. ETAP (Electrical Transient and Analysis Program) is a technology and research advancement that accelerates and simplifies the calculation and simulation of power losses. Solutions that can be provided to reduce losses and voltage drops can be done by setting tap changers on substation transformers and also by increasing the capacity of overload transformers. This research includes the improvement of power losses and voltage drops in the 20 kV distribution system of Intako extension, PT PLN (Persero) ULP Porong. The method used is simulation with data obtained in the ETAP application. Based on the results of the load flow simulation in the existing conditions, there are 8 transformers that experience overload, namely PC415 (108.7%), PC18 (91.3%), PC82 (89.7%), PC122 (89.3%), PC194 (99.2%), PC533 (81.9%), PC589 (137%), PC671 (87%), and there are 3 buses that experience voltage drops that exceed the SPLN standards, while referring to the IEC standards, there are 24 buses that experience voltage drops that do not meet the standards. The total active power losses are 58.8 kW and the total reactive power losses are 285 kVAR. Conditions after adjusting the tap changer on the substation transformer by -2.5 on the primary side can reduce the voltage drop on several buses, but the transformer bus that is overloaded has not met the IEC standard of nominal voltage. Conditions after increasing the capacity of the transformer experiencing overload conditions can reduce the voltage drop value so that all buses meet the IEC standards of nominal voltage. The active power loss value decreased from 58.8 kW to 51.0 kW, and the reactive power loss value decreased from 285 kVAR to 273.2 kVAR. Keywords— Distribution System, Power Loss, Voltage Drop, Tap Changer, Up-Rating Capacity Transformer.
PENGARUH PENGOPERASIAN AIR CONDITIONER TERHADAP KUALITAS TEGANGAN DAN ARUS GERBONG KERETA K3 BUATAN PT INKA Putra, Ade Mahendra Darma; Hasanah, Rini Nur; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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One device that is a nonlinear load is AC (Air Conditioner) or air conditioner. This can happen because of the use of induction motors in AC which work using the principles of electromagnetic induction so that they have saturation properties or conditions where the current is not proportional to the voltage. In the manufacture of train carriages by PT INKA on the 612 SS New Generation Train Unit project, two units of AC with specifications of 20,000 kCal, 10 kW are used in each carriage. The use of thisload has the potential to produce harmonic distortion in it. This research focuses on the effect of using AC on the quality of voltage and current waves that occur in K3 train carriages. The research process was carried out by taking in 3 conditions, namely without AC load, AC load, and overall load. The tools used are a Hioki CM3286-50 clamp meter and an oscilloscope. From the test results, it is known that the AC used in K3 train cars produces a THDv of 1.71% R phase, 1.67% S phase and 2.17% T phase. Meanwhile, THDi is 4.94% R phase, 6.37% S phase, and 6.79% T phase. The use of AC load does not have a significant effect on voltage harmonics but has a big effect on current harmonics which when there is no AC load produces a THDi of 59.49% R phase, 29.98% S phase, and 118.14% T phase. However, after using an AC load it produces a THDi of 4.31% R phase, 4.75% S phase, and 6.35% T phase. Because AC has a large current, the THDi value tends to be similar to AC load conditions only. It can be concluded that energysaving lamp loads containing power converter components produce higher harmonics than induction motor loads on AC. Apart from that, the THDv and IHDv values from various load conditions meet the IEEE 519-2014 standard, namely a maximum of 8% for THD and 5% for IHD. The THDi and IHDi values at full load conditions also meet IEEE 519-2014 standards, namely a maximum of 8% for TDD and 7% for IHD orders 3 to 11. Keywords: Harmonics, AC, Non-linear, Voltage, Current
ANALISIS RANCANGAN OPERASI SISTEM PEMBANGKIT LISTRIK TENAGA HYBRID (PLTS – PLTB) ENERGI TERBARUKAN PADA GEDUNG BERSAMA TEKNIK ELEKTRO UNIVERSITAS BRAWIJAYA Hidayat, n/a; Nurwati, Tri; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The increasing need for energy sources is not commensurate with the limited nature of fossil energy, so a transition to renewable energy is needed. However, the availability of renewable energy for electricity generation is still limited and expensive. To overcome this, a combination or hybrid of several power plants is needed. Hybrid operation has long been known as a solution to increase the amount of power generation from renewable energy plants. The aim of this research was to determine the results of designing a hybrid system (PLTSPLTB) using hybrid design software and analyzing it from technical and economic aspects. The method used is in the form of calculations on technical and economic aspects through parameters in the form of average hourlyload, solar radiation, wind speed as well as component specification and price data. Based on the results of operating system design using hybrid design software, it was found that the results of optimizing solar panels with a capacity of 2.75 kW, 1 wind turbine, 4 kW inverter, and connected to the PLN grid produce electrical energy of 11,910 kWh/year and renewable penetration of 41.5%. When installing a hybrid system (PLTS-PLTB), the energy purchased to the PLN network is 6,968 kWh and the energy sold to the network is 1,235 kWh for one year. From a technical aspect, it requires 10 solar panels with 5 solar panels installed in series and 2 solar panels installed parallel, the highest average solar panel output power occurred in September at 13.52332 kW and the lowest average output power occurred in February at 9.89158 kW. The highest average output power of wind turbines occurred in September at 196.583 W or 0.197 kW and the lowest average output power occurred in March at 15.625 W or 0.0156 kW. From the economic aspect, the results show a Net Present Cost (NPC) of IDR 252,264,302.01, Total Annualized Cost (TAC) of IDR 14,981,718.67, Cost of Energy (COE) of IDR 1,268.45 per kWh. Keywords: Hybrid operation, Calculation, Solar radiation, Wind speed.
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)
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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.
Co-Authors Adhi Purbo Putranto Adinata, Dwi Andhika Valent Afwega Bagas Kena Pranata Ahmad Zaki Ramadhani Akbar, Muhammad Yoga Rochmanu Akiyat, Muhammad Haekal Aldian Eka Fitranto Aldo Julian Hastono Alfarizy, Muhammad Mahdiy Alfian Sakti Pamungkas Ali Ridho Alief Nasruddin Ananda, Redzko Andre Prasetya Andy Darmawan Angela Sembiring Anshar Affandy Arbi Ramadhan Arief Y., Primanda Ariella, Syafika Safa Arifin Surya Winarto Arizqun Anwar Fatcha Armeyelia, Bulan Asmungi, Gaguk Asyhari, Ahmad Rizky Ayyub Setiyoso Bobby Pratama Bryan Malvin Budi Agung Raharjo Darryl Octaviyanto Kusputra Dhofir, Mochammad Dhofir, Mochammad Ditto Adi Permana Ditza Pasca Irwangsa E. Wakama, Tamunonengi Eka Citra Agustini Eka Mardiana Engga Kusumayoga Fakhruddin Ar Rozi Faza Azmi Hidayat Firly Azka Nurhidayah Frandicahya P., Akhmad Gita Andrika Sari Gitawan Dimas Prakoso Hadi Suyono Hafidh, Muhammad Yusril Haidar, Achmad Hari Santoso Harry Soekotjo Dachlan Hery Purnomo Hidayat, n/a Imam Suwandi Imtiyaz, Kholis Irvan, Muh. Zulvi Ismail Abdan Syakuro Firmansyah Ismail Musirin Jawoto Tri Prabowo Jayadiyuda, I Wayan Angga Kemal Pasha Pramudianto Khairil Anwar Khalid, Farhan Firzatullah Khatijah Sofia Surya Putri Suharyanto Kosa Shantia Kurniawan, Ferryo Lenz Lavelia Permata C. Lukmanul Hakim Lunde Ardhenta Maharani, Bella Fathia Mahfudz Shidiq Malamansyah, Triamelia Salsabila Mardotillah, Nanda Azizah Maulidina, Nabila Vida Miranda Christine Moch Dhofir Moch. Dhofir Moch. Dhofir Mochamad Azwar Anas Mochamad Shofwan Rizqulloh Mochammad Abdul Ghofur Mohammad Fahririjal Mokhammad Wildan Dahlan Muhammad Alaudin Tri Kurnia Muhammad Daniyal Muhammad Haekal Akiyat Muhammad Rigadho Suprayogi n/a Hariyono n/a Soeprapto n/a Wijono n/a Wijono Nainggolan, William Sutan Nisa, Rizqa Ulya Fakhrun Nur Rahma Dona Nur Subhan Nurhakiki, Mauludiya Annisa Pradana Anoraga Tinto Pradhana, Raka Radithya Pratama, Muhammad Pashya Rifky Putra, Ade Mahendra Darma Rachendra, Bima Denatta Ramadhan, Muhammad Indrata Ramadhani, Ahmad Zaki Rendy Previanto Retno Puji Lestari Reza Sufi Al Kamil Reza, Dana Ammar Rifdillah Zulafa Rini Nur Hasanah Rizki, Fahrina Novia Rizky Hamid Robbyansyah Rizqi Wahyu Rahmariadi Rohman, Deny Fatkhur Rosi David Rosihan Arby Harahap Rosihan Arby Harahap Ruditta Devianti Rusli, Mochammad Satrio Wicaksono Shiddiq, Muhammad Fatihul Shufinah, Syahla Siregar, Josua Hatorangan Suyono, Hadi Syarif, Habib Teguh Utomo Titis Aridanti Pratiwi Tri Nurwati Triyoga, Joseph Kristian Ullin Dwi Fajri A. Utomo, Muhamad Afiq Nur Warda Islamiyah Wijono, n/a Wiwin Wahyuni Yudhistira Rizal Firmansyah Yulistiono, Irwan Zainuri, Akhmad Zulfikar Subagio