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All Journal Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) Jurnal Ampere JURNAL SURYA ENERGY Jurnal Teknik Elektro East Asian Journal of Multidisciplinary Research (EAJMR) Electrician : Jurnal Rekayasa dan Teknologi Elektro
Oktaviani, Wiwin A
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Perhitungan Indeks Keandalan Penyulang Tenggiri Gardu Induk Sei Kedukan Dengan Metode Failure Mode Effect Analysis Oktaviani, Wiwin A; Rianty, Enny; Barlian, Taufik
JURNAL SURYA ENERGY Vol. 4 No. 1 2019
Publisher : UNIVERSITAS MUHAMMADIYAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jse.v4i1.1841

Abstract

ABSTRAKPenyulang Tenggiri merupakan penyulang terpanjang di GI Sei Kedukan Palembang. Penyulang ini diperuntukan untuk menyuplai beban ke Kecamatan Sp.Padang Kabupaten OKI. Penyulang ini banyak melewati areal pepohonan sehingga  sering mengalami gangguan. Untuk mengukur tingkat kehandalan penyulang ini dilakukan perhitungan indeks-indeks keandalan distribusi ; SAIFI,SAIDI,CAIFI,CAIDI,ENS dan AENS. Indeks keandalan ditinjau pertitik beban. Penelitian ini menggunakan metode Failure Mode and Effect Analysis (FMEA) menghitung gangguan yang terjadi di suatu titik beban berkontribusi terhadap kegagalan sistem secara keseluruhan. Setiap titik beban dihitung terlebih dulu nilai rata-rata  laju kegagalan (?) dan durasi kegagalannya (r) dan nilai durasi kegagalan tahunan (U) sebelum menghitung indeks keandalannya. Indeks kegagalan per titik beban kemudian diperbandingkan untuk menentukan titik beban yang kritis. Hasil perhitungan menunjukkan pada Penyulang Tenggiri ketidakhandalan berada pada titik beban  1,2, 16, 21 dan 24 dimana titik beban 1  merupakan titik paling kritis dan mengalami  kerugian terbesar diantara titik-titik beban lainnya dikarenakan titik beban ini merupakan titik beban terjauh.Kata Kunci : Indeks Keandalan System Distribusi, Titik Beban, System Distribusi 20 KV, Penyulang Tenggiri ABSTRACTThe Tenggiri feeder is the longest feeder in Sei Kedukan substation. This feeder is intended to supply the District of Sp.Padang, OKI Regency. These feeders pass through a lot of trees so they often get disturbed. To measure the reliability of these feeders, the calculation of the distribution reliability indices is performed; SAIFI, SAIDI, CAIFI, CAIDI, ENS and AENS. Reliability index reviewed by point load. This study uses the Failure Mode and Effect Analysis (FMEA) method to determine the extent to which disruptions at a load point contribute to overall system failure. On each load point, the average failure rate (?), the average failure duration (r) and the annual failure duration value (U) are calculated before calculating the reliability index. The failure index per load point is then compared to determine the critical load point. The results show that the load points 1,2, 16, 21 and 24 are the critical load points, where load point 1 is the most critical point and experiences the greatest loss among other load points because this load point is the furthest from the substation. Keywords: Distribution System Reliability Indices, Load Point, 20kV Distribution System, Tenggiri Feeder
ANALISIS PENGARUH PERUBAHAN RO DAN Ri PADA TURBIN ULIR ARCHIMEDES SARWAN Saleh, Zulkiffli; Oktaviani, Wiwin A; Pratama, Muhammad Yoga
Jurnal Teknik Elektro Vol 12 No 1 (2022): Jurnal Teknik Elektro
Publisher : Program Studi Teknik Elektro Fakultas Teknik Universitas Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36546/jte.v12i1.652

Abstract

Fokus penelitian ini diarahkan pada analisis pengaruh perubahan diameter dalam rotor (Ri) dan diameter luar rotor (Ro) terhadap daya yang dihasilkan sistem PLTMH untuk menentukan kondisi optimal kerja sistem. Salah satu parameter signifikan pada PLTMH berbasis turbin ulir Archimedes adalah besaran Ro dan Ri, perubahan nilai tersebut akan berpengaruh pada daya keluaran sistem. Dari hasil pengukuran dan perhitungan data yang dilakukan pada PLTMH Sarwan didapatkan kecepatan aliran air maksimum sebesar 7,7112 m/dt dan kecepatan aliran air minimum sebesar 2,7463 m/dt, dan Ri optimal sebesar 0,56 m dengan daya terbangkitkan sebesar 4,098 kW
Analisis Kinerja PLTS 200WP Secara Realtime Menggunakan IoT Apriani, Yosi; Alfarizi, Muhammad; Saleh, Zulkifli; Oktaviani, Wiwin A; Wijaya, Krisna Nata
Jurnal Ampere Vol. 8 No. 1 (2023): JURNAL AMPERE
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/ampere.v8i1.12300

Abstract

Technological developments occur in various ways, for example wireless communication technology, computer networks and the internet, designing monitoring and control systems based on the Internet of Things (IoT). The application of the IoT concept has been widely carried out with various studies in various fields of life including analyzing solar panels in real time which can be done by utilizing the development of micro and wireless and internet-based control technology called IoT. The performance of a PLTS can be assessed by calculating the efficiency of the PLTS components themselves. The purpose of this study is to analyze the performance of a 200Wp PLTS from IoT-based Blynk application data. The methodology used in this study starts from 1) tool design; 2) tool making; 3) tool testing; 4) evaluation. From the results of the study it was found that the efficiency of solar panels was 11.35% The efficiency of SCC was 93%, the efficiency of Baerai was 94.8%, the efficiency of inverters was 92.6%, and the total efficiency of PLTS was 9.29% . The efficiency of this PLTS is considered low for a 200Wp PLTS
Modeling Design of Picohydro Power Generation System Using Crossflow Turbine Apriani, Yosi; Hidayat, Syarif; Saleh, Zulkiffli; Oktaviani, Wiwin A; Mochamad Sofian, Ian
East Asian Journal of Multidisciplinary Research Vol. 3 No. 4 (2024): April 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/eajmr.v3i4.8830

Abstract

The goal of this project is to learn how to use a Crossflow turbine to create a Picohydro power plant system modeling. The manufacturing process, from design to evaluation, is the methodology employed. The turbine type utilized is a crossflow turbine, measuring 26 cm in outer diameter, 17.3 cm in inner diameter of the blade runner, and up to 35 pieces of blades. The calculations show that the distance between the blades is 2.3 cm, the blade length is 8.5 cm, the blade width is 4.4 cm, and the radius of curvature of the blade is 2.8 cm. The test results without load obtained the highest turbine rotation of 421 Rpm produces a voltage of 7.29 V before going through the boost converter.
Vessel Tracking System Based LoRa SX1278 Apriani, Yosi; Oktaviani, Wiwin A; Sofian, Ian Mochamad
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol. 9 No. 3 (2023): September
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/jiteki.v9i3.26385

Abstract

This research presents a vessel tracking system that provides real-time coordinate and speed information. The idea behind the development of this system originated from Automatic Identification System (AIS) technology, which functions as a vessel monitoring system in maritime areas. The system aims to improve navigation safety, monitor vessel traffic, and maritime security. In Indonesia, AIS is regulated by the Ministry of Transportation. However, this technology has not yet been implemented in river waters. In addition, AIS is a complex and expensive system. In this research, geographic location detection information in the form of a vessel tracking system is obtained using the UBlox Neo-6M GPS module based on LoRa technology. The LoRa mechanism periodically sends location data and vessel speed from the node to the gateway. The data is then sent to the ThingSpeak server using the MQTT protocol. On the server, the data can be accessed for further analysis. The developed system shows that the research can be realized and the system functions properly through a series of experimental tests. While in the in situ test, the system displayed good performance on LoRa SF 7 configuration with a signal strength of -118 dBm within the communication range of 1000 meters. This result can be improved by considering the MAPL value of -138 dBm.
Kendali Motor DC Brushless Modifikasi Mengunakan IC Ne555 Dan CD4017 Oktaviani, Wiwin A; Sukri, Ibnu
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 15 No. 1 (2021)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v15n1.2159

Abstract

In general, the Brushless DC motor speed controller uses an Atmega 16 microcontroller and a MOSFET, which often increases the MOSFET's temperature, especially when the motor is loaded. This article discusses the use of the IC NE555 and CD4017 as a frequency regulator to the MOSFET gate by periodically igniting the forward voltage from the change in the potentiometer value. We carried out the test in an unloaded and unloaded state with voltage variations of 2.5 Vac, 7.5 Vac, 12.5 Vac, and 19.5 Vac. The test results show an excellent tool response where the higher the frequency value, the motor speed will increase. The maximum speed when unloaded reaches rpm at a frequency of 574.6. Whereas in the load test, the full speed reaches 20987 rpm at a frequency of 524.675 Hz. During the test, there was no temperature increase in the MOSFET.
Variasi Nilai Tegangan Percik Arrester Akibat Pengaruh Kapasitas Trafo Daya dan Jarak Arrester Oktaviani, Wiwin A; Septiaji, Rahmat; Taufik, Barlian
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 16 No. 2 (2022)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v16n2.2235

Abstract

The ability of each substation to withstand lightning and overvoltage affects the power distribution of the power system. In order to make the best operation of the substations, it is necessary to install Arresters which are used to protect the transformers in each substation from overvoltage caused by lightning surges. In this study, the effect of capacity on the placement distance of the arrester is discussed with 30 MVA and 60 MVA transformers. The purpose of this study was to determine the effect of the power transformer capacity of the four substations on the value of the arrester spark voltage and to obtain the optimal arrester installation technique at each substation using the Lagrange optimization method. Lagrange optimization method is used to determine the optimal distance between the arrester and the power transformer. The calculation results show that in a transformer with a capacity of 60 MVA, the Arrester spark voltage occurs at t = 20 microseconds with a voltage drop of 390.49 kV. Meanwhile, in a transformer with a capacity of 30 MVA, the Arrester spark time is at t = 13.9 microseconds with a voltage drop of 266.3 kV. This shows the capacity of the transformer that affects the magnitude of the Arrester's spark voltage and the spark time. Thus, the smaller the transformer capacity, the smaller the arrester spark time with the large voltage drop
Co-Authors Alfarizi, Muhammad Apriani, Yosi Mochamad Sofian, Ian Pratama, Muhammad Yoga Rianty, Enny Saleh, Zulkiffli saleh, zulkifli Septiaji, Rahmat Sofian, Ian Mochamad Sukri, Ibnu Syarif Hidayat Taufik Barlian Taufik, Barlian Wijaya, Krisna Nata