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Usman Usman
Politeknik Negeri Ujung Pandang
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering

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RANCANG BANGUN PYRANOMETER BERBASIS MIKROKONTROLER Usman, Usman; Muhammad, Umar; Wobowo, Nanang Roni
Patria Artha Technological Journal Vol 2, No 2 (2018): Patria Artha Technological Journal
Publisher : Department of Electrical Engineering, University of Patria Artha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7.612 KB) | DOI: 10.33857/patjou

Abstract

Makalah ini membahas pyranometer  yang merupakan alat pengukur radiasi matahari y menggunakan panel surya ukuran mini sebagai sensornya. Alat ini dirancang untung mengukur secara real time dan pencatatan hasil pengukuran secara otomatis dimana data yang direkam tersebut disimpan langsung pada Micro SD Card. Hasil pengukuran alat ini yang ditampilkan pada LCD dan yang tersimpan pada media penyimpanan merupakan hasil dari proses dari arduino dengan menggunakan algoritma fixed point iteration. Masukan dari arduniono tersebut adalah tegangan  dan arus yang diperoleh dari panel surya dan suhu yang diperoleh dari sensor suhu DS18B20. Parameter yang diperlukan untuk menghitung radiasi matahari adalah tegangan hubung buka (Voc), arus hubung singkat (Isc) dan suhu. Hasil pengukuran yang dilakukan mulai dari pukul  09.00 sampai 16.00 menunjukkan  pola yang sama dengan sumber lainnya. Akan tetapi data yang berhasil tersimpan pada micro SD card masih mempunyai keterbatasan, dimana hasil pengukuran tersimpan pada media penyimpanan tersebut hanya dapat menyimpan data sampai pada pukul 13.45. Data yang tersimpan tersebut berekstensi txt. Data hasil pengukuran radiasi matahari selain tersimpan pada media penyimpanan juga ditampilkan pada Liquid Cristal Display (LCD) akan diperbaharui setiap 1 menit.
Performance and Economic Analysis of Solar Water Pump System Laboratory Scale Usman, Usman; Sunding, Alang; Parawangsa, Akbar Naro
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.431 KB) | DOI: 10.31884/jtt.v4i1.96

Abstract

The dependence of solar radiation in generating electricity by PV will have an impact on the PVWPS performance, besides The PVWPS consists many components with different characteristics. Thus this research will investigation the performance conduct economic analysis of PVWPS. To achieve that objective measurement of data starting at 09.00 until 16.00. The data are solar radiation, voltage and current of PV/pump and the time required to fill the container with a certain volume. Analysis data is using the equations that have been predetermined and comparison other research. The results obtained that the water discharge generated by PVWPS will be proportional to solar radiation, as a result the production of electricity generated by PV. The pump efficiency and system is proportional to solar radiation. This phenomenon is the effect of water debit dependence on solar radiation. The result of economic analysis is the price of electricity generated by SPATS is relatively cheap and the water cost for every m3 is inversely proportional to the water discharge generated by the pump.
Rancang Bangun Pagar Otomatis dengan Finger Print Berbasis Mikrokontroller Usman, Usman; Abdul Azis Rahmansyah, Abdul; Fajri Apriadi, Nur
Jurnal Teknologi Terapan Vol 3, No 1 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (538.436 KB) | DOI: 10.31884/jtt.v3i1.3

Abstract

The fence is one of the leading security in maintaining a building. Conventional fence require operator to open and close it, so it does not effective and efficient. This problem can be solved with automated systems. This research aims to design fance system using finger print sensor  based microcontroller arduino, which is equipped with a locking system that use a solenoid. This experimental research is starts from the design, fabrication and testing. Fences made have specifications 3.2 m x 1.5 m with a total weight is 30.67 kg, path lengthis 2.1 m, diameter sprocket 0.03 m, Voltage DC motor is 12 V  and rotation is 195 rpm. The test results showed a good performance conform with its initial design, where a fence can be opened with a fingerprint has been recorded before. Solenoid can open and lock, likewise with the the photodiode can detect object is on the track. The test results obtained there are differences when opening / closing compared with the results design is 20%, with an average voltage is 12.06  V, current is 1 A, rotation is 135 rpm, and the time it takes 9.9 s, where the torque produced is of 0.64 Nm and maximum load can be driven by a DC motor is at 59.97 kg.
Purwarupa dan Kinerja Pengering Gabah Hybrid Solar Heating dan Photovoltaic Heater dengan Sistem Monitoring Suhu Usman, Usman; Muchtar, Akhyar; Muhammad, Umar; Lestari, Nunik
Jurnal Teknik Elektro Vol 12, No 1 (2020): Jurnal Teknik Elektro
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v12i1.24028

Abstract

Grain drying is a process to reduce grain moisture content to certain conditions, so the grain can last longer in storage. The grain dryer model used in this research was Indirect Type Solar Dryer (ITSD). In order to make this dryer can work at night, heating element that used electrical energy from solar panels was added. This energy is a renewable and environmentally friendly energy. This dryer was equipped with a temperature monitoring system and control of the photovoltaic heater. The results of temperature monitoring and voltage sensors to controlling photovoltaic heaters based on validation are categorized as work measurement tools, because they have an error of 0.5% – 2%. Whereas the relay works when the battery voltage is 11 - 10.9 V. This dryer can dry grain to reach a moisture content of 14.90% from initial  moisture content of 48.46%. The drying process lasts for 11 hours, which is 7 hours using solar energy and 4 hours using photovoltaic heaters. The average temperature produced by dryer system during the drying process is 35.28 °C with a drying efficiency of 60.14%.
Perancangan dan Pembuatan Trainer Penyearah Terkendali 3 Fasa Usman Usman; Fatmawati Azis; Ardy Wirana; Rahmiani Habibuddin
Jurnal Teknologi Terpadu Vol 5, No 1 (2017): JTT ( Jurnal Teknologi Terpadu )
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v5i1.207

Abstract

Abstract Trainer is very important in education process, especially at level of vocational education like as polytechnic. Presence is needed to improve skills of students and lecturer on the teaching and learning process in lab activities. Aim the research is make a practical trainer controlled rectifier 3-phase, which the rectifier parameters approach the theoretically calculated value. The method used in this research is experimental method which the study of controlled rectifier theory is designed, manufactured and tested. The test results show voltage value and output power average error are 14.45% on Half Wave Converter and 11.12% in Semi Converter.Keywords: trainer, controlled rectifier 3-phase, half-wave converter, semi converter.AbstrakTrainer praktikum sangat penting dalam proses pendidikan, terlabih pada tingkatan pendidikan vokasi seperti politeknik. Keberadaannya sangat dibutuhkan untuk meningkatkan skill peserta didik serta memudahkan tenaga pengajar dalam melakukan proses belajar mengajar khusunya untuk kegiatan praktikum. Tujuan yang akan dicapai dalam penelitian ini adalah menghasilkan sebuah triner praktikum penyearah 3 fasa terkendali, dimana parameter-parameter penyearahnnya mendekati nilai yang dihitung secara teori. Metode yang digunakan adalah dengan metode experimental dimana dari kajian teori penyearah terkendali ini dirancang, dibuat dan diuji. Hasil pengujian menunjukan nilai tegangan arus dan daya keluaran menujukan presentasi kesalahan rata-rata sebesar 14.45% pada Konverter Setengah Gelombang dan 11.12% pada Semi Konverter.Kata kunci: trainer praktikum, penyearah 3 fasa terkendali, konverter setengah gelombang, semi konverter.
Pemodelan dan Simulasi Photovoltaic Menggunakan Pendekatan Model Tiga Diode Usman; Ahmad Rosyid Idris; Sofyan; Irfan Syamsuddin
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 9 No 4: November 2020
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1602.625 KB) | DOI: 10.22146/jnteti.v9i4.688

Abstract

Photovoltaic (PV) performance measurement requires a conditioned environment, which are conditions of solar radiation and temperature standard, thus, a special equipment is required. A simple way to do this is by modeling the PV. The method used to describe the characteristics of PV is equalizing the maximum power of model with the maximum power from datasheet, which is implemented in MATLAB. The simulation results show that the difference between ????????????,???? and ????????????,???? is 0.000314 W and the average absolute error of current, compared to measurement, is 2.159%. The I-V curves obtained in this model are also very identical to the I-V curves using two diode approach or one diode model. The simulation results of this model are also compared to the same model, using the MRFO, SFO, COA, WOA, SA, and GA algorithms, which shows high similarities. I-V curves are strongly influenced by the constants ????, ????????, and ????????. The constant ???????? affects the curvature of the I-V curve, to be precise the curvature at ????????, ????????. Whereas ???????? affects the curvature of the I-V curve before ????????, ???????? and ???????? after ????????, ????????.
Penentuan Keandalan Sistem Distribusi 20 KV Penyulang Malili dengan Metode Section Technique dan FMEA Usman Usman; Indra Indra; Muhammad Thahir; Sofyan Sofyan; Ahmad Rosyid Idris; Sarma Thaha
PROtek : Jurnal Ilmiah Teknik Elektro Vol 9, No 2 (2022): PROtek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v9i2.4985

Abstract

This paper discusses the determination of the reliability index of the power distribution system. The reliability of the power distribution system is strongly influenced by the duration and frequency of the disturbance, causing customers not to receive electrical energy. This reliability is measured by indices called SAIFI, SAIDI, and CAIDI. The method used to calculate the failure rate required to determine the reliability indexes are the section technique and Failure Mode Effect Analysis (FMEA). The results obtained using the FMEA method are better results. Compared to PLN's SAIFI and SAIDI standards, the Malili feeder is still quite reliable, because its value is smaller than the PLN standard. However, when compared to the IEEE standard, this Malili feeder is not categorized as reliable because the SAIFI value obtained is still higher. While for SAIDI the value is still below the IEEE standard. To improve the reliability index of this feeder, it is necessary to add a protection component to localize the fault.
PENERAPAN SISTEM POMPA AIR TENAGA SURYA UNTUK PENYEDIAAN AIR TANAMAN JAGUNG PADA MUSIM KEMARAU DI DESA SOKKOLIA, KECAMATAN BONTOMARANNU, GOWA-SULSEL Usman Usman; Ahmad Rosyid Idris; Muhammad Ruswandi Djalal; Muhammad Thalib; Mustika Ayu; Muh. Ikhra Aliefka Putramardani
Jurnal Abdi Insani Vol 9 No 4 (2022): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v9i4.800

Abstract

Farmers in the hamlet of Borong Rappo, Sokkolia Village, Bontomarannu District, Gowa Regency with an area of 10 ha of rice fields. In the dry season, water for irrigation is obtained from wells or reservoirs. For water to be channeled to the fields, the water in the well or reservoir is pumped using a pump machine. There are two types of pump machines used by farmers, namely machines with petalite fuel and those using gas, thereby increasing production costs. This activity aims to help farmers reduce operational costs in the form of fuel costs by implementing a Solar photovoltaic water pumping system (SPVWPS). SPVWPS has almost 0 (zero) operational costs. The procedure for implementing this PKM activity begins with a site survey and discussions with partners to determine solutions to problems. The types of SPVWPS implemented are direct driven type and deep well (submersible) pump type. The implemented SPVWPS capacity is 900 Wp for solar panels and 700 W for DC pumps. The results of observations of pump performance in sunny conditions the pump can produce a discharge of 84.1 l/minute so it takes about 2.77 hours to meet the water needs of each paddy field. While in cloudy conditions this SPTAS can pump 53.3 l/minute of water, in this condition it takes 4.38 hours to meet water needs. The SPTAS system can eliminate pump operating costs and the average time needed to meet water needs each day is 3.75 hours.
On-Grid PV Performance in Various Irradiation Conditions, Types, and Load Power Alamsyah Achmad; Usman Usman; Ahmad Rizal Sultan; Ahmad Rosyid Idris; Andarini Asri; Fahmi Ryadin
PROtek : Jurnal Ilmiah Teknik Elektro Vol 10, No 1 (2023): PROtek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v10i1.5543

Abstract

There are several types of photovoltaic system configurations, one of which is the on-grid PV system. This system is simple compared to other systems. Because there are two different energy sources that can supply the load either together or separately, an analysis of how the irradiation affects the electrical parameters on the load side or the grid itself is required. The goal of this research is to examine the performance of on-grid PV under various irradiation variation, type, and load power to power factor, grid frequency, and load conditions. To measure the performance of on-grid PV, parameter calculations are carried out in the form of PV efficiency, final yield, reference yield, and performance ratio, and the results of measurements of power factor, grid frequency, and load are observed due to variations in irradiation, type, and load power. The results show that the performance of on-grid PV is good; low irradiation can result in a decrease in the grid power factor, while the grid and load frequencies are in normal conditions for various variations of irradiation, type, and load power.
IMPLEMENTASI SISTEM POMPA AIR TENAGA SURYA TIPE BATTERY COUPLED DAN WEBSITE PEMASARAN PADA KELOMPOK TANI PAKKOKO KA'JUNG Usman Usman; Muhammad Nur Yasir Utomo; Alamsyah Achmad; Sofyan Sofyan; As'ad Ramadhan; Fikra Ramadhan; Nurhadi Sasono
Jurnal Abdi Insani Vol 10 No 4 (2023): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v10i4.1134

Abstract

The source of water for irrigating shallot plants in the Kelompok Tani Pakkoko Ka'jung comes from Pamsimas. The irrigation method, the water that has been collected in the pool, is then pumped with a gasoline engine-driven pump machine, thus increasing production costs, in addition to water payments from Pamsimas. On the other hand, the method of marketing the harvest is through direct sales to village markets near the partners. The purpose of this activity is to reduce production costs in this case the cost of pump fuel in the process of watering shallot plants, and create a website-based method of selling or marketing crops. The implementation of this program began with a survey to identify problems, discussions to determine problem-solving, and planning to determine the capacity of SPATS and website platform and design. The Implementation consisted of installation, training on SPATS operation and maintenance, and training on website content updates. The implemented SPATS consists of 1820 Wp solar panel, 3 kW inverter, 864 Wh battery and 1 kW pump. Meanwhile, the marketing website was built with the wordpress platform. The SPATS commissioning results show good performance, where the inverter output parameters such as voltage, frequency and power factor show the same thing as the parameters generated by the PLN network. The training on the operation and maintenance of SPATS as well as training on updating the content of the partner website independently has been able to operate SPATS and update the website content that has been made. The implementation of battery-coupled SPATS significantly reduces production costs. Meanwhile, the website as a marketing medium provides a new way of marketing.
Co-Authors Achmad , Alamsyah Achmad, Alamsyah Ahmad Rizal Sultan Ahmad Rosyid Ahmad Rosyid Idris Ahmad Rosyid Idris Ahmad Rosyid Idris ahmad yani Akhyar Muchtar, Akhyar Alamsyah Achmad Alamsyah Achmad Andarini Asri Apri Junaidi, Apri Ardy Wirana As'ad Ramadhan Fahmi Ryadin Fajri Apriadi, Nur Fatmawati Azis Fikra Ramadhan Indra Indra Irfan Syamsuddin Isman, Muh Lestari, Nunik Lukman, Musfirah Putri Muh. Ikhra Aliefka Putramardani Muh. Ilham Muhammad Nur Yasir Utomo Muhammad Ruswandi Djalal Muhammad Thahir Muhammad Thalib Mustika Ayu Nurhadi Sasono Parawangsa, Akbar Naro Rahmansyah, Abdul Azis Rahmiani Habibuddin Sarma Thaha Sirad, Mochammad Apriyadi Hadi Sofyan Sofyan , Sofyan Sofyan Sofyan Sofyan Sofyan Sofyan Sofyan Sunding, Alang Syarif Hidayatullah Umar Muhammad Wobowo, Nanang Roni Yuliana Yuliana