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All Journal Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) ELINVO (Electronics, Informatics, and Vocational Education) PROtek : Jurnal Ilmiah Teknik Elektro JMM (Jurnal Masyarakat Mandiri) Martabe : Jurnal Pengabdian Kepada Masyarakat Journal of Robotics and Control (JRC) PUBLIKASI PENELITIAN TERAPAN DAN KEBIJAKAN Jurnal Rekayasa Elektro Sriwijaya Aptekmas : Jurnal Pengabdian Kepada Masyarakat Formosa Journal of Sustainable Research (FJSR) Journal of Telecommunication Control and Intelligent System Electrician : Jurnal Rekayasa dan Teknologi Elektro

Wiwin A. Oktaviani

Jurusan Teknik Elektro Universitas Muhammadiyah Palembang, Palembang Jl. Jenderal Ahmad Yani 13 Ulu Seberang Ulu II, 13 Ulu, Kec. Plaju, Kota Palembang, Sumatera Selatan 30116

Author-ID : 2770978

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Continuous Power Flow and Time Domain Analysis for Assessing Voltage Stability Wiwin Armoldo Oktaviani; Taufik Barlian; Yosi Apriani; Nugraha Syarif
Journal of Robotics and Control (JRC) Vol 1, No 6 (2020): November
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.1637

Voltage instability is considered one of the primary sources of insecurity in power systems. Voltage instability is the phenomenon in which the voltage on the receiver's side is dropping far below the normal value and does not return even after establishing a voltage recovery mechanism, or continue to oscillate due to lack of attenuation. In this study, there will be a voltage stability analysis on the power system in several phases by conducting a power flow analysis, static voltage stability analysis using continuous power flow method, and dynamic voltage stability analysis using the time-domain analysis. The power system tested on this research is the IEEE 6 bus system from Wood Wollenberg, with the software used for the simulation, which is PSAT. The results show that voltage stability analysis using Continuous Power Flow and Time Domain Analysis can provide a more comprehensive overview of a power system stability level. The highest decrease in voltage with a value of 1.5% appears in Bus 5 which is also suffering the lowest stability level. The system has a load margin (λ) value of 1.6130 a clearing time of under 0.4 seconds

Potential Force Algorithm with Kinematic Control as Path Planning for Disinfection Robot Iswanto Suwarno; Wiwin A. Oktaviani; Yosi Apriani; Dhiya Uddin Rijalusalam; Anish Pandey
Journal of Robotics and Control (JRC) Vol 3, No 1 (2022): January
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.v3i1.11528

The disinfection robot is a virus-sterilizing robot that uses a nonholonomic robot model. Route planning algorithms are needed to allow disinfection robots to sterilize rooms in unknown areas and perform the task while navigating using a potential field algorithm. There is a problem applying the algorithm to nonholonomic robots: avoiding obstacles. The proposed route planning algorithm has been transformed into a potential force used to plan the path of disinfection robots in static and dynamic environments and environments with static obstacles. A potential field algorithm is used. There are some issues when the potential force algorithm is applied to nonholonomic disinfection robots in the area. Like any other robot, it takes a long time to avoid static obstacles. Therefore, this paper proposed a potential force algorithm that allows a robot to move towards a target point while avoiding static obstacles. The algorithm showed that a modified potential field algorithm with potential force could be applied to differential-driven robots for path planning. The disinfection robot could avoid obstacles with a faster response using this algorithm.

Efektifitas Perlindungan Kawat Tanah Jaringan SUTM 20 kV Gardu Induk Boom Baru Palembang Wiwin Armoldo Oktaviani; Indah Permata Hati
PROtek : Jurnal Ilmiah Teknik Elektro Vol 6, No 2 (2019): PRotek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Jaringan SUTM seringkali mengalami gangguan petir tak langsung berupa sambaran induksi . Hal ini disebabkan tingkat ketahanan impuls isolasi V50% dari isolator SUTM relative rendah. Untuk itu kawat ditempatkan pada jaringan untuk perlindungan. Efektifitas perlindungan kawat tanah dinyatakan sebagai faktor perisaian yang didefinisikan sebagai hasil bagi tegangan induksi dengan kawat tanah dan tegangan induksi tanpa kawat tanah.Tujuan penelitian ini adalah untuk mengetahui tingkat efektifitas kawat tanah dalam melindungi kawat saluran pada SUTM 20 kV di Gardu Induk Boom Baru. Dari hasil perhitungan dan analisa bahwa nilai faktor perisaian kawat tanah di Gardu Induk Boom Baru sudah cukup efektif, karena mampu mengurangi jumlah gangguan petir induksi sebesar 35,50 gangguan per 100 km per tahun

PEMBUATAN VIDEO METODE TANGKAP LAYAR SEBAGAI MEDIA PEMBELAJARAN DARING DI MASA PANDEMI COVID-19 Yosi Apriani; Ramadisu Mafra; Wiwin A Oktaviani
JMM (Jurnal Masyarakat Mandiri) Vol 4, No 6 (2020): DESEMBER
Publisher : Universitas Muhammadiyah Mataram

Abstrak: Merebaknya pandemi COVID-19 membuat pergeseran aktifitas masyarakat dari semula berkegiatan di luar rumah dan secara tatap muka menjadi kegiatan berbasis rumah dan dilakukan secara daring. Salah satu pergeseran aktifitas dimaksud adalah kegiatan KBM di sekolah. Tujuan dari pengabdian ini agar para guru di SIT Mushab bin Umair memiliki kemampuan tambahan dalam kegiatan belajar mengajar secara daring, yaitu mampu membuat video dengan menggunakan metode tangkap layar. Metode pelaksanaan kegiatan ini dimulai dari sosialisasi kegiatan, yang kedua pelaksaan pelatihan di sekolah dan secara daring, yang ketiga tahapan evaluasi kegiatan. Penggunaan media video pembelajaran merupakan salah satu upaya untuk menunjang KBM daring ini. Pada kegiatan ini, diperkenalkan cara membuat video pembelajaran metode tangkap layar, dimana guru dapat merekam penjelasan bahan ajar yang telah tersimpan di PC, Kehadiran guru di kelas dalam memberikan penjelasan dapat digantikan dalam bentuk video. Dari sisi siswa video yang dibuat oleh gurunya sendiri akan lebih terasa nyaman ditonton, karena siswa telah mengenal sosok yang memberikan penjelasan di video, dibandingkan menonton video pembelajaran yang dibuat orang lain. Pelatihan pembuatan video pembelajaran ini dilaksanakan di SIT Mushab bin Umair. Diharapkan dengan adanya kegiatan pelatihan ini para guru akan lebih siap menghadapi kegiatan KBM daring selama masa pandemi COVID-19 maupun pasca pandemi.Kata Kunci: COVID 19; Metode Pembelajaran; Daring; KBM.Abstract: The outbreak of the COVID-19 pandemic has shifted community activities from activities outside the home and face-to-face to home-based activities and carried out online. One of the shifts in activities referred to is the teaching and learning activities in schools. The purpose of this service is so that the teachers at SIT Mushab bin Umair have additional abilities in online teaching and learning activities, namely being able to make videos using the screen capture method. The method of implementing this activity starts from the socialization of the activities, the second is the implementation of training in schools and online, the third is the activity evaluation stage. The use of instructional video media is one of the efforts to support this online teaching and learning activities. In this activity, it was introduced how to make learning videos for the screen capture method, where the teacher could record explanations of teaching materials that had been stored on the PC. From the student's point of view, videos made by the teacher themselves will feel more comfortable watching, because students already know the figure who provides explanations on the video, compared to watching learning videos made by other people. The training for making learning videos was held at SIT Mushab bin Umair. It is hoped that with this training activity teachers will be better prepared to face online teaching and learning activities during the COVID-19 pandemic and post-pandemic

IPTEKS UNTUK LAYANAN KESEHATAN CUMA-CUMA (LKC) DOMPET DHUAFA PALEMBANG Yosi Apriani; Wiwin A Oktaviani; Ade Arinia Rasyad
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 2 No 3 (2019): APTEKMAS Volume 2 Nomor 3 2019
Publisher : Politeknik Negeri Sriwijaya

From the results of the research that has been carried out a 220 watt DC to AC inverter circuit using AKI / battery has succeeded well according to the procedure. The working system of a DC inverter device is very useful for efficient use of electricity, especially in the application of medical devices at the Dompet Dhuafa (DD) Free Health Service (Palembang) in Palembang with a power of 220 watts. The working system of a 220 watt DC inverter circuit can convert DC voltage (direct voltage) to AC voltage (alternating voltage).

Design and Implementation of LoRa-Based Forest Fire Monitoring System Yosi Apriani; Wiwin A. Oktaviani; Ian Mochamad Sofian
Journal of Robotics and Control (JRC) Vol 3, No 3 (2022): May
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.v3i3.14128

One of the great disasters on earth is forest fires. Attempts to detect disaster events have been made with the help of monitoring technology. However, the problem is that the sensor is less responsive to detecting the presence of fire. Furthermore, sending information about fire incidents throughout the forest cannot use the existing communication platform. Therefore, we designed a forest fire monitoring system using LoRa. This technology is based on wireless which can transmit data across the forest. To detect the presence of fire, Arduino Uno is used as a microcontroller that regulates input from the AMG8833 sensor and GPS Ubox 6M. The experiment shows that the AMG8833 sensor is more sensitive in detecting the presence of fire as the catch range changes between 3 to 10 meters. In that distance range, hotspots were detected 19.25 oC to 122.5 oC when testing the sensor node is done. The monitoring system developed in this study demonstrated that sensor nodes and gateways could communicate up to 500 meters apart with a signal quality of -134 dBm. The best LoRa configuration mode for this communication capability is a Bandwidth of 250, a Code Rate of 4/5, and a Spread Factor of 10.One of the great disasters on earth is forest fires. Attempts to detect disaster events have been made with the help of monitoring technology. However, the problem is that the sensor is less responsive to detecting the presence of fire. Furthermore, sending information about fire incidents throughout the forest cannot use the existing communication platform. Therefore, we designed a forest fire monitoring system using LoRa. This technology is based on wireless which can transmit data across the forest. To detect the presence of fire, Arduino Uno is used as a microcontroller that regulates input from the AMG8833 sensor and GPS Ubox 6M. The experiment shows that the AMG8833 sensor is more sensitive in detecting the presence of fire as the catch range changes between 3 to 10 meters. In that distance range, hotspots were detected 19.25 oC to 122.5 oC when testing the sensor node is done. The monitoring system developed in this study demonstrated that sensor nodes and gateways could communicate up to 500 meters apart with a signal quality of -134 dBm. The best LoRa configuration mode for this communication capability is a Bandwidth of 250, a Code Rate of 4/5, and a Spread Factor of 10.

Uji Akurasi Dan Uji Presisi Pengukuran Suhu Penghantar Dengan Metode Thermovisi ( STUDI KASUS : PENGHANTAR PRABUMULIH 1 GARDU INDUK 150 KV GUNUNG MEGANG) Wiwin A Oktaviani; Taufik Barlian; M Agus Salim
Jurnal Rekayasa Elektro Sriwijaya Vol. 2 No. 1 (2020): Jurnal Rekayasa Elektro Sriwijaya
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Sriwijaya

Metode Thermovisi merupakan pemantau jarak jauh kondisi suhu peralatan Gardu Induk saat berbeban guna mengetahui suhu panas pada klem dan konduktor dan nilai selisih keduanya. Hasil pengukuran thermovisi perlu secara statistik dijustifikasi dikarenakan dua hal : 1) hasil pengukuran yang bervariasi; 2) hasil pengukuran akan dijadikan acuan oleh PLN untuk menyusun rekomendasi maintenance lanjutan. Paper ini membahas penerapan uji akurasi dan uji presisi hasil pengukuran dengan Metode Thermovisi dan nilai emisivitas pada bay penghantar Prabumulih 1 GI Gunung Megang. Hasil perhitungan menunjukkan bahwa selisih suhu klem dan konduktor penghantar Prabumulih 1 di bawah 10 C dan tidak termasuk dalam kondisi I – IV menurut NETA MTS-1997. Hasil ini menunjukkan kondisi penghantar dalam keadaan baik. Nilai emisivitas konduktor bay Penghantar Prabumulih 1 sebesar 0,5 dan masuk dalam kategori nilai emisivitas aluminium menurut kriteria RSM. Nilai akurasi pengukuran mencapai 97, 4 %. Dengan demikian, hasil pengukuran dengan thermovisi konduktor pada bay penghantar Prabumulih 1 dapat dijadikan acuan penyusunan rekomendasi maintenance penghantar selanjutnya.

Pengujian Isolasi Trafo Daya 30 MVA pada GI Sungai Juaro Palembang dengan Indeks Polaritas dan Tangen Delta Wiwin A Oktaviani; Taufik Barlian; Marami Ahmad Gazani
Jurnal Rekayasa Elektro Sriwijaya Vol. 3 No. 1 (2021): Jurnal Rekayasa Elektro Sriwijaya
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Sriwijaya

Tahanan isolasi pada trafo dapat mengalami pemburukan yang dapat mengakibatkan kegagalan operasi transformator seiring bertambahnya usianya trafo. Karenanya diperlukan pengujian untuk mengetahui keadaan isolasi trafo. Selain usia, besarnya pembebanan juga mempengaruhi kondisi tahanan isolasi. Berdasarkan data, pembebanan di Gardu Induk Sungai Juaro telah mencapai lebih dari 90%. Tujuan penelitian ini untuk mengetahui kualitas tahanan isolasi transformator daya di GI Sungai Juaro dengan melakukan pengujian Indeks Polariasi dan Tangen Delta dengan menggunakan data tahun 2019 dan 2021. Hasil uji kemudian diolah menggunakan Sofware Matlab. Nilai indeks polarisasi di sisi primer dan tersier trafo mengalami penurunan sebesar 0,09 dan 0,29 untuk pemakaian selama dua tahun. Sedangkan hasil pengujian tangen delta dibawah 0,5% Rate Power Faktor. Secara umum, hasil-hasil yang didapat masih berada dalam range IEE Std 62-1995 yang menunjukkan kondisi tahanan isolasi masih dalam kategori baik.

Distribusi Potensial Pentanahan Gedung Baru Universitas Muhammadiyah Palembang Anisa Dwiyana; Wiwin A Oktaviani; Rahmat Wiranto; Taufik Barlian
Jurnal Rekayasa Elektro Sriwijaya Vol. 3 No. 1 (2021): Jurnal Rekayasa Elektro Sriwijaya
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Sriwijaya

Pembangunan dua gedung baru di kampus Universitas Muhammadiyah Palembang diperlukan untuk mengakomodir kebutuhan akan gedung perkuliahan dan administrasi yang lebih representatif. Gedung-gedung baru ini ketinggiannya cukup mencolok dibandingkan gedung-gedung terdahulu, sehingga dibutuhkan sistem proteksi petir untuk meminimalisir dampak dari sambaran. Sistem perlindungan yang dimaksud meliputi air terminal yang dihubungkan dengan elektroda pentanahan melalui down conductor. Salah satu parameter yang harus diperhatikan adalah besaran potensial dan distribusinya di antara elektroda pentanahan, karenanya penelitian ini bertujuan untuk mengetahui nilai potensial pentanahan dan distribusi potensial elektroda pentanahan pada kedua gedung serta faktor yang mempengaruhinya. Pada penelitian ini, perhitungan distribusi potensial sistem proteksi eksternal gedung baru kampus Universitas Muhammadiyah Palembang dilakukan melalui simulasi menggunakan Alternative Transient Program (ATP) Draw 72. Dalam simulasi, kabel Bare Core 70 mm2 digunakan sebagai down conductor dan dua elektroda pentanahan. Secara fisik kedua gedung tidak banyak perbedaan sehingga konfigurasi sistem proteksi petir eksternal juga tidak jauh berbeda. Dari simulasi diperoleh besar potensial pada Gedung FEB sebesar 61 kV sedangkan pada Gedung Terpadu FT-FAI sebesar 89 kV. Nilai-nilai ini sama untuk kedua batang elektroda yang menunjukkan potensial terdistribusi merata di antara elektroda pentanahan. Perbedaan nilai potensial disebabkan kondisi tanah antara kedua gedung berbeda dimana Gedung FEB berada pada lahan yang relatif lebih kering dibandingkan Gedung Terpadu FT-FAI. Dari hasil ini dapat disimpulkan bahwa kondisi tanah menjadi faktor yang paling mempengaruhi nilai potensial sistem pentanahan.

Design and Build of 1000 V Joule Thief Inverter by Utilizing Pineapple as an Energy Source Wiwin A Oktaviani; Arrofi Maulana
Journal of Robotics and Control (JRC) Vol 3, No 1 (2022): January
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.v3i1.10198

The availability of fossil energy-based energy sources is currently depleting and cannot meet the increasing consumption. Therefore, the development of environmentally friendly alternative energy or known as green energy is increasingly being encouraged. One form of green energy that can be utilized, especially in the South Sumatra region, is pineapple. In this paper, the use of pineapple as a raw material for batteries is introduced. The material for making pineapple batteries will affect the amount of battery capacity produced. The pineapple battery capacity will then determine the amount of output voltage generated by the joule thief converter. Apart from the material, the voltage increase in the joule thief converter circuit is also influenced by the source voltage of the pineapple battery, the ferrite core step-up transformer, and the arrangement of the diodes and capacitors in the circuit. The pineapple battery capacity produced in this study is 1209 mAh, the maximum voltage is 4.63 V, the pineapple battery life is 1.0334 hours, and the charging process is 34 minutes. The resulting circuit in this study shows that the maximum output voltage of the joule thief converter is 1531 V, a current of 4.19 mA and the ability to increase the voltage to the source is 300 times.

Co-Authors Ade Arinia Rasyad Anisa Dwiyana Anish Pandey Apriani, Yosi Arrofi Maulana Asri Indah Lestari Azizul Muttaqin Barlian Taufik Devrie Kurniawan Dhiya Uddin Rijalusalam Dipociala Dipociala Dwisantiya Ganta Saputri Ibnu Sukri Indah Permata Hati Irfan Ahmad Israa Al_barazanchi Iswanto Suwarno M Agus Salim M. Aidil Dwiansyah Marami Ahmad Gazani Muhammad Hurairah Muhammad Hurairoh Muhammad Rama Bagaskara Nugraha Syarif Rahmat Septiaji Rahmat Wiranto Ramadisu Mafra, Ramadisu Sofian, Ian Mochamad Taufik Barlian Taufik Barlian Taufik Barlian Zukiffli Saleh Zulkifli Saleh

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