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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
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Core Subject : Education,
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Articles 23 Documents
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Search results for , issue "Vol. 12 No. 4 (2024)" : 23 Documents clear
DESAIN SISTEM COLD STORAGE CONTROL PADA PENYIMPANAN BUAH DAN SAYUR PASCAPANEN BERBASIS LOGIKA FUZZY UNTUK OPTIMALISASI SUHU DAN KELEMBAPAN Wibowo, Rafli Prihantono Putra; Rusli, Moch.; Ambarwati, Rusmi
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Post-harvest handling is one of the strategies to support food security in Indonesia. This handling is necessary because harvestedproducts, such as various types of leafy and fruit vegetables, have different shelf lives (Arista, 2021). Additionally, damage to harvested products occurs more quickly if handling during or after harvesting is poor. Therefore, the storage of post-harvest products requires a cooling container to maintain the quality of the harvested goods. To ensure ideal storage conditions for items that need specific conditions, a cold storage control system is a strategic step to enhance operational performance and reduce product losses due to damage during storage. To ensure food quality and safety, the cold storage parameters that need to be controlled are temperature, humidity, and air quality (Mohammed et al., 2022).This study was conducted to explain the process of controlling temperature and relative humidity in a cold storage using a fuzzylogic controller. In the control process, it was found that the chiller system has a steady state time of 4000 s or 66 minutes and 40 seconds with a steady state error of 1.63%. When disturbed, the recovery time obtained is 1,074 s (17.9 minutes) with the steady state error increasing to 2.7%. Meanwhile, the freezer system has a steady state time of 3,774 s or 62 minutes and 54 seconds, no overshoot, and no steady state error. However, when disturbed, the freezer system will have a steady state error of <1% with a recovery time of 1,094 s or 18.2 minutes. For the humidity control system, to reach 90% RH, it takes 1,950 s or 32 minutes and 30 seconds with no steady state error. However, the humidity system graph has an overshoot of 5%. When the humidity system is disturbed, the recovery time (rt) is 200 s or 3.3 minutes. However, after the disturbance, a steady state error of 0.4% is obtained. Keywords: Cold Storage Control, Temperature and humidity control, Fuzzy Logic Controller
ANALISIS TRANSIEN VSC-LCC HVDC TERKONEKSI WIND FARM PADA SISTEM KELISTRIKANMADURA Dzikrullah, Hafeeza Rinn; Hasanah, Rini Nur; Suyono, Hadi
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Stabilitas transien terjadi saat sistem tenaga mempertahankan frekuensi, tegangan, arus tetap stabil atau konstan jika terjadi gangguan seperti gangguan hubung singkat. Semakin cepat sebuah sistem kembali pulih pada keadaan steady state semakin kecil kemungkinan adanya kerusakan pada sistem. Untuk itu diperlukan analisis pada sistem dan alternatif tambahan yang dapat mengurangi waktu transien. Penilitian ini membahas mengenai respon transien saat ada gangguan hubung singkat pada sistem kelistrikan Madura 150kV. Dengan tiga rangkaian berbeda yaitu rangkaian AC, rangkaian dengan windfarm dan rangkaian HVDC VSC-LCC yang disimulasikan dengan software DIGSILENT. Hasil simulasi menunjukan perbedaan tegangan, serta respon arus dan frekuensi pada bus Sumenep 2 setelah gangguan hubung singkat. Kata kunci—HVDC, Line Comutated Converter (LCC), Time domain simulation, Voltage Source Converter (VSC)
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.
RANCANG BANGUN PENAMPIL STATUS KONDISI ANGIN SECARA ONLINE MENGGUNAKAN ARDUINO NANO Ibtihal, Moch Fahulul; Muslim, Muhammad Aziz; Setyawan, Raden Arief
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Indonesia is the 15th largest country in the world and the largest archipelago in the world. With Indonesia's vast territory, the country has diverse natural conditions so that natural disasters that occur also vary in each region. One of the many natural disasters that occur in Indonesia is strong winds. Strong winds are quite dangerous because they cannot be predicted. This can certainly harm the community. Prevention efforts are very important in dealing with this phenomenon, such as periodic observation of wind speed. The solution to this problem is to design a tool that can provide wind speed information that can be accessed through the website and can provide warnings. The making of this tool consists of the main parts in the form of a microcontroller, wind speed sensor, humidity temperature sensor, and GSM module. The results of the sensor will be processed by a microcontroller to be sent via a GSM module connection and can be accessed using the internet through a website that has been created. From the results of the tool design, if the wind speed ≥11 m / s and wind acceleration ≥ 5.5 m / s then on the website there is a danger sign display and the alarm on the tool will turn on. Keywords— microcontroller, wind speed sensor, GSM module
ANALISIS KOORDINASI SISTEM PROTEKSI RELAI OVERCURRENT PADA JARINGAN DISTRIBUSI UNIT 3A PLTU PAITON Andreyanto, Tegar Setyo; Dhofir, Moch.; Hasanah, Rini Nur; Siswandi, Wawan
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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This research aims to determine the appropriate OCR settings to handle potential short-circuit currents in the distribution network of Unit 3A at Paiton Power Plant under existing load conditions. This study focuses on the Overcurrent Relay (OCR) protection device. The short-circuit current calculations are performed mathematically using the per-unit method and sequence impedance circuit. The OCR resetting calculations in this study apply the British Standard BS-142 for relay current settings, the IEC 60255-151 standard for inverse relay operating time, and the IEEE 242 standard for relay coordination time delay. In this study, short-circuit current simulation and OCR operation simulation are conducted using the ETAP 12.6 application. The results of this research indicate the OCR relay settings as follows: Extremely Inverse with a Pickup of 0.88 and TMS of 0,425, Very Inverse with a Pickup of 0.4 and TMS of 0.1, Long Time Inverse with a Pickup of 0.75 and TMS of 0.025. Additionally, relay coordination with a time delay of 0.2-0.4 seconds is achieved. Based on the simulations, the OCR operates effectively and in compliance with the standards. Keywords— Overcurrent relay, Short Circuit, ETAP, Relay Setting
PERFORMANCE COMPARISON OF DOUBLE-SWITCH CUK CONVERTER AND CUK CONVERTER Akbar, Alif Aulia; Hasanah, Rini Nur; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The conversion of high voltage with continuous input and output is a crucial requirement for current applications such as electric vehicles and renewable energy. In this research, a converter is proposed based on the Cuk converter by modifying the components into two switches, three inductors, three diodes, and four capacitors. The duty cycle and pulse signals on both switches are the same. The circuit analysis process is carried out using the continuous conduction mode method, assuming eachcomponent is in an ideal state. The analysis is conducted in two modes: when the switch is on and when the switch is off. Simulation and circuit analysis are shown to convert an input voltage of 12 volts to 156 volts on the output side. Simulations are conducted to analyze the input voltage, input current, output voltage, output current, voltage on the capacitor, current on the inductor, and then compare the changes in duty cycle to the output voltage, changes in duty cycle to efficiency, changes in duty cycle to the voltage stress on the switch and diode, and voltage stress on the switch relative to voltage gain. The results of these comparisons indicate that this converter can provide higher efficiency and a wider voltage gain capability with lower voltage stress value. Keywords: Cuk Converter, Efficiency, Simulation, Voltage Stress
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.
PENAMBAHAN PROTEKSI OVERCURRENT RELAY UNTUK MENINGKATKAN KEANDALAN PENYULANG JETIS PADA GI WLINGI Gymnastiar, Muhammad Ilham; Dhofir, Moch.; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The purpose of this study is to obtain the setting of the overcurrent relay (OCR) and the right coordination to protect the Jetis feeder network from 3-phase and 2-phase short-circuit current levels. The addition of OCR is also done on the Jetis Feeder to improve network reliability. To set OCR, it starts by calculating the 3-phase and 2-phase short-circuit currents in each protection zone based on the impedance of the equipment that supports each protection zone. The calculation of OCR settings uses the British BS-142 standard guideline with OCR working time using the IEC 60255-151:2009 standard with the OCR curve type standard inverse. ETAP software in the study was used to simulate short-circuit currents and also OCR work analysis. The output of the ETAP simulation is in the form of short-circuit current values for each protection zone and also the OCR working time curve of each protection zone. The result of this study is OCR resetting from the existing value that the OCR coordination condition of zone 1 and zone 2 is still overlapping. Therefore, OCR zone 1 and OCR zone 2 were reset with the TMS result in zone 1 being 0.4 and TMS zone 2 being 0.225. The trip time distance between zone 1 and zone 2 is 0.397s. The analysis of the addition of OCR in Zone 3 to improve reliability by sharing the load. The addition of OCR in zone 3 results in a TMS of 0.1. The trip time distance between zone 2 and zone 3 is 0.283s which is in accordance with the IEEE std 242-1986 standard for the working time limit between two relays is 0.2s-0.4s. Therefore, the delay time distance in zone 1, zone 2 and zone 3 relays has worked well according to existing protection guidelines. Keywords — Relay, Over Current Relay, time setting, current setting, Feeder, ETAP.
ANALISIS KINERJA VACUUM CIRCUIT BREAKER PADA SISI 13,8 kV PT PAITON OPERATION & MAINTENANCE INDONESIA (POMI) UNIT 3 Adityara, Farrel Billy; Dhofir, Moch.; Hasanah, Rini Nur; Siswandi, Wawan
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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This study aims to analyze the performance of the VCB based on the parameters in SPLN Standard No. 52-1 1983 and IEC 62271-100 and to determine the technical feasibility of the 13,8 kV VCB work at PT POMI Unit 3A is still feasible to operate or not. The VCB parameter test uses standards on each test with the parameters of insulation resistance, contact resistance, synchronous contact, and vacuum. This study was conducted by comparing the data of the test results in 2015 and 2021 with the standard values in each test. In the insulation resistance test results obtained at each measuring point, each phase has a value above 13,8 MΩ. The contact resistance test results of each phase obtained have a value below 22 μΩ. In the synchronous contact test, the results of calculating the delta time or the difference in working time when VCB Open and VCB Close have a value below 10 ms. The results of vacuum testing of each phase on the test equipment indicator show an indication of "GOOD" which means that the pressure in the VCB has a value below 10-7 mbar. Based on the test results of insulation resistance, contact resistance, synchronous contact, and vacuum, the VCB 13,8 kV PT POMI Unit 3A Incoming is in a suitable condition for use and can be operated because the test results according to standards. Keywords – Vacuum Circuit Breaker (VCB), Insulation Resistance, Contact Resistance, Synchronous Contact, Vacuum.
RANCANG BANGUN SISTEM MONITORING KUALITAS UDARA (PM2.5 DAN PM10) DI TAMAN SINGHA MERJOSARI BERBASIS INTERNET OF THINGS DENGAN METODE LOGIKA FUZZY Akmal, Muhammad Dhiyadin; Rusli, Moch.; Nurussa’adah, n/a
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The air quality in Indonesia has become a serious concern due to the high levels of pollutants that endanger public health. In 2023, Indonesia ranked 14th as the most polluted country in the world and first in Southeast Asia. PM2.5 and PM10 particulates are the main pollutants having a significant impact. The average concentration of PM2.5 and PM10 in Indonesia reaches 7.4 times the WHO guidelines. The health impacts of these pollutants include irritation, headaches, asthma, heart disease, and lung cancer. With air pollutants posing a threat to public health, continuous monitoring is necessary to identify and measure air pollutant levels. Therefore, this study aims to design and develop an Internet of Things (IoT)-based air quality monitoring system using fuzzy logic in Taman Singha Merjosari, Malang. This system utilizes a PMS5003 sensor to measure PM2.5 and PM10 levels, an ESP32 as a microcontroller, and Blynk Cloud for monitoring. Fuzzy logic is used to process the data and produce air quality outputs. The research results show that the system can operate as designed, with the PMS5003 sensor having an accuracy of 98.69% for PM2.5 and 98.48% for PM10. The fuzzy logic system demonstrates an accuracy of 97.49%. Keywords: Air quality, Taman Singha Merjosari, PM2.5, PM10, fuzzy logic

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