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<![CDATA[ANALISA KEANDALAN SISTEM JARINGAN DISTRIBUSI TEGANGAN MENENGAH 20KV BERDASARKAN JUMLAH GANGGUAN DAN LAMANYA PEMADAMAN ]]>
<![CDATA[Benriwati Maharmi]]>
<![CDATA[ Sainstek (e-Journal) Vol. 1 No. 1 (2013) ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Pekanbaru ]]>
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<![CDATA[Saat ini PT. PLN (Persero) merupakan pemegang kendali dalam pemenuhan kebutuhan masyarakat terhadap energi listrik. Dalam penyaluran energi listrik terhadap pelanggan melalui jaringan yang panjang akan mengalami banyak gangguan, untuk meningkatkan pelayanan kebutuhan energi listrik kepada pelanggan perlu diketahui tingkat keandalan dari saluran yaitu kualitas dari sistem distribusi tersebut sehingga dapat dilakukan perbaikan untuk meningkatkan keandalan sistem. Tingkat keandalan jaringan distribusi pada umumnya diukur dengan dua parameter, yaitu: SAIDI (System Average Interruption Duration Index) dan SAIFI (System Average Interruption Frequency Index). Semakin tinggi angka SAIDI dan SAIFI akan menunjukkan semakin berkurangnya tingkat keandalan dan tingkat pelayanan ke pelanggan. Analisis dilakukan pada sistem jaringan distribusi 20 KV penyulang Arengka dan Penyulang Pantai Cermin, didapat SAIFI dari Penyulang Arengka dalam satu tahun adalah 1,20299 pemadaman/pelanggan/tahun dan penyulang Pantai Cermin adalah 10,3195 pemadaman/pelanggan/tahun. Sedangkan SAIDI nya adalah 1,723693 jam/pelanggan/tahun untuk penyulang Arengka dan penyulang Pantai Cermin didapat SAIDI nya adalah 24,17436 jam/pelanggan/tahun. Dari hasil analisa dinyatakan bahwa jaringan distribusi penyulang Arengka lebih handal dibandingkan penyulang Pantai Cermin, ini berdasarkan SPLN 59:1985. Keandalan Pada Sistem Distribusi 20 kV DAN 6 kV. Dengan Index rata-rata untuk SAIDI 12,842 jam/pelanggan/tahun dan SAIFI 2,415 pemadaman/pelanggan/tahun]]>
<![CDATA[Sistem Deteksi Sinyal Handphone Di Dalam Kabin Pesawat Berbasis Mikrokontroller Atmega328 ]]>
<![CDATA[Benriwati Maharmi]]>;
<![CDATA[Rendy Eka Hartandy]]>;
<![CDATA[Anwar Karnaidi]]>;
<![CDATA[Nurhasnah Nurhasnah]]>;
<![CDATA[Silfia Rini]]>
<![CDATA[ SAINSTEK Vol. 10 No. 2 (2022) ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Pekanbaru ]]>
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DOI: 10.35583/js.v10i2.154
<![CDATA[Teknologi komunikasi seluler beberapa tahun terakhir ini berkembang sangat pesat dengan generasi komunikasi nirkabel masa depan yang lebih cerdas dan tidak tergantikan dalam kehidupan sehari-hari. Dilihat dari ketergantungan pengguna pada smartphone/handphone di berbagai domain seperti komunikasi, e-bisnis, m-learning, dan m-gamming, m-healthcare dan sistem informasi manajemen seluler yang digunakan di segala tempat, tidak terkecuali di dalam pesawat terbang. Berdasarkan peraturan nasional yang diawali dengan UU No. 36 Tahun 1999, UU No. 11 tahun 2008 dan UU No.1 tahun 2009 tentang pelarangan penggunaan telphone genggam (handphone/ smartphone) yang didukung oleh teknologi GSM (Global System for Mobile Communication) dengan frekuensi 900MHz – 2300 MHz akan mengganggu komunikasi penerbangan dengan frekuensi 960 –1215 MHz yang dapat menyebabkan kecelakaan pesawat. Penelitian ini bertujuan merancang dan membuat sistem deteksi sinyal handphone/ smartphone di dalam kabin pesawat berbasis Mikrokontroller Atmega328. Untuk mendeteksi penggunaan frekuensi atau sinyal handphone menggunakan RF detektor terdiri dari rangkaian LC, dan dua Op-Amp pada IC LM358N. LCD 1602 akan menampilkan notifikasi lokasi penggunaan sinyal handphone dan mengaktifkan Piezoelectric Buzzer, untuk memberikan informasi kepada cabin crew bahwa terdeteksi penggunaan sinyal handphone di dalam kabin pesawat. Dari hasil pengujian, sistem yang dibuat dapat mendeteksi penggunaan sinyal handphone (900 MHz-2300 MHz) pada jarak maksimal 20 cm – 24 cm dengan waktu respon rata-rata 1,62 detik – 2,63 detik.]]>
<![CDATA[Solar Panel Tracking Control Monitoring System ]]>
<![CDATA[Benriwati Maharmi]]>;
<![CDATA[Johan Bagus Purnomo Sidi]]>;
<![CDATA[Machdalena Machdalena]]>
<![CDATA[ Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) ]]>
Publisher : <![CDATA[International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse) ]]>
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DOI: 10.36842/jomase.v67i2.348
<![CDATA[Solar energy is extraordinary and the largest energy on earth and no pollution. Solar cell technology is a technology that can absorb solar energy and convert in to electrical energy. In general, the installation of solar panels is only in one direction so that the absorption by the photovoltaic collector will not be optimal. Subsequence, the electricity produced is also less than optimal. To optimize the absorption of sunlight, the photovoltaic collector must be parallel to the sun. In this study, 4 LDR light sensors were used as detectors of the highest intensity of sunlight, the LDR output would enter the Arduino Mega microprocessor and control the DC motor to drive the solar panels. The monitoring process used a current/voltage sensor (INA219), temperature and humidity sensor (DHT 11), data from the sensor was processed by the ESP8266 Node MCU and then the data can be accessed via an Android Smartphone using the Blynk application. These data were transmitted to users wirelessly via the ESP8266 Node MCU module. From the test results, the energy generated when the solar cell was stationary averages V = 14.28 volts, I = 0.66 A and the energy when the solar cell moved averages V = 14.63 volts, I = 0.92 A. Therefore, the comparison of electric power in the condition that the solar panels moved according to the movement of the sun has increased by 30.13% compared to the stationary condition.]]>
<![CDATA[Sistem Pengasapan Ikan Otomatis Mengunakan Arduino AT MEGA 2560 ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Palaha, Fadhli]]>;
<![CDATA[Prasetyo, Findo]]>
<![CDATA[ SainETIn : Jurnal Sains, Energi, Teknologi, dan Industri Vol. 6 No. 1 (2021): SainETIn ]]>
Publisher : <![CDATA[Teknik Elektro Universitas Lancang Kuning ]]>
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DOI: 10.31849/sainetin.v6i1.7872
<![CDATA[Ikan air tawar memiliki kandungan protein yang tinggi yang disukai oleh masyarakat banyak, selain harganya yang relative terjangkau dan banyak dibudidayakan. Ikan air tawar merupakan makanan yang cepat megalami pembusukan. Di Riau sendiri yang terkenal dengan ikan salai yang diproses dengan pengasapan supaya ikan lebih tahan lama dan menambah cita rasa pada ikan, pengasapan ikan secara tradisional dengan sistem terbuka dinilai kurang efektif karena panas dan asap yang dihasilkan akan banyak terbuang. Dalam penelitian ini dikembangkan sistem pengasapan otomatis dengan menggunakan elektrik dan tertutup, sehingga proses pengasapan lebih efektif. Alat pengasapan ikan otomatis berbasis mikrokontroler Arduino AT Mega 2560 dan sensor DHT 22 untuk mengontrol suhu dan kelembaban secara otomatis. Hasil penelitian diperoleh pengasapan secara konvensional membutuhkan waktu 12-13 jam, sedangkan pengasapan ikan otomatis membutuhkan waktu 7-8 jam. Nilai suhu yang digunakan pada alat pengasapan ikan yaitu mencapai 80˚C ketika nilai suhu melebihi 80˚C maka secara otomatis element (pemanas) akan mati. Kipas sebagai alat untuk mensirkulasi asap akan bekerja pada suhu 60 oC berhenti bekerja pada suhu 58 oC.]]>
<![CDATA[Development Of Cost-Saving Energy For Home Lighting Based Microcontroller and RTC ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Kardova, Toriq]]>;
<![CDATA[Ermawati]]>
<![CDATA[ International Journal of Electrical, Energy and Power System Engineering Vol. 2 No. 2 (2019): International Journal of Electrical, Energy and Power System Engineering (IJEEP ]]>
Publisher : <![CDATA[Electrical Engineering Department, Faculty of Engineering, Universitas Riau ]]>
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DOI: 10.31258/ijeepse.2.2.20-24
<![CDATA[The use of controlled and efficient electrical energy can save the cost of electricity expenditure. This study aims to design the cost saving energy tool for household scale of lighting using automatic microcontroller system. The design of the appliance used the automatic control system of home lights, which setting time using RTC (Real Time Clock) and a microcontroller Arduino Mega 2560. Power supply on this system was operated to supply power all existing components and controller using Arduino Mega 2560 microcontroller. Based on the test results, the cost-saving energy tool worked as an expectation of controlling the On/Off lights automatically, the RTC and current sensors can work properly to limit the current. Therefore, this design proposed can reduce the cost of electrical energy.]]>
<![CDATA[Desain Kontrol Smart Home Berbasis IoT dan Bluetooth ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Bijaksono, Candra]]>;
<![CDATA[Machdalena, Machdalena]]>;
<![CDATA[Yolnasdi, Yolnasdi]]>
<![CDATA[ SAINSTEK Vol. 12 No. 1 (2024) ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Pekanbaru ]]>
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DOI: 10.35583/js.v12i1.249
<![CDATA[Kemajuan teknologi yang pesat telah memungkinkan integrasi Internet of Things (IoT) dan Bluetooth dalam berbagai aspek kehidupan, termasuk dalam desain smart home. Smart home dapat memfasilitasi dan memudahkan pekerjaan manusia dengan cara mengotomatisasi berbagai fungsi rumah tangga, sehingga meningkatkan efisiensi dan kenyamanan. Oleh karena itu, penulis bertujuan mendesain kontrol smart home berbasis IoT dan Bluetooth menggunakan modul ESP32 yang memiliki dual-mode untuk koneksi internet melalui Wi-Fi dan komunikasi lokal melalui Bluetooth . Platform Blynk IoT untuk pembuatan antarmuka yang ramah pengguna dan manajemen perangkat, termasuk relai untuk kontrol independen perangkat listrik. Hasil penelitian dari pengujian kontrol smart home yang dibuat menggunakan Bluetooth dan internet menggunakan aplikasi Blynk dengan beban berupa lampu dan beberapa peralatan rumah tangga lainnya diperoleh bahwa pada saat beban di nyalakan (on) dan dimatikan (off), maka perintah dieksekusi hampir tanpa jeda diasumsikan kurang dari 1 detik serta perangkat yang terhubung dengan ESP32 dapat dipantau secara real-time,]]>
<![CDATA[Integration of Photovoltaic Distributed Generation in Grid Distribution Network: A Literature Review ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Syafii, Syafii]]>;
<![CDATA[Azhari Zakri , Azriyenni]]>
<![CDATA[ Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 3 (2023): November 2023 ]]>
Publisher : <![CDATA[LPPM Universitas Andalas ]]>
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DOI: 10.25077/aijaset.v3i3.114
<![CDATA[Distributed Generation (DG) will become a future generation system known as a renewable energy source. Renewable energy is a topic being developed due to being environmentally friendly. It fulfills the need for electrical energy to replace fossil energy sources to reduce climate change due to carbon emissions towards net-zero emissions by 2050, reducing climate change by 1.50 C to 20 C. Solar photovoltaic (PV) is an energy source that has been widely developed and has enormous potential; where PV can be integrated off the grid and on the grid. Integrating PV into the network is challenging, so the network remains stable and reliable due to intermittent energy generation. This paper reviews the integration of PV-DG distribution networks. Topology, optimization, and impacts on the distribution network are also discussed in this paper. The literature review results show that PV-DG integrated into the grid has an impact caused by intermittent PV generation.]]>
<![CDATA[Penyuluhan Mitigasi Risiko Penggunaan Listrik Rumah Tangga kepada Warga Perumahan Berkah Family Village ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Ramdha, Triana]]>;
<![CDATA[Arya, Engla Harda]]>
<![CDATA[ JURNAL ABDIMAS DOSMA (JAD) Vol. 4 No. 2 (2025): JUNI ]]>
Publisher : <![CDATA[IKATAN ALUMNI DOSEN MAGANG KEMENRISTEKDIKTI TAHUN ANGKATAN 2017 ]]>
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<![CDATA[Berkah Family Village (BFV) is a residential community, which they have consumed large the electricity usage but low awareness of household electrical safety. This community service program aimed to enhance residents’ knowledge of safe electricity practices. The activity was conducted through three stages: initial observation, participatory educational sessions, and practical demonstrations, including safe device usage and short-circuit response simulations. Evaluation using pre- and post-activity questionnaires revealed a significant improvement in understanding, with over 85% of participants able to identify safe electrical equipment and basic emergency procedures. The program also fostered active participation and a stronger commitment among residents to implement safer and more responsible electricity use in their homes. These results highlight the effectiveness of community-based education in reducing household electrical risks.]]>
<![CDATA[Simulation of Single Phase Five-Level Inverter Based Modified Pulse-Width Modulation Approach ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Ermawati, Ermawati]]>
<![CDATA[ Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 37 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) ]]>
Publisher : <![CDATA[International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse) ]]>
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DOI: 10.36842/jomase.v37i1.399
<![CDATA[The solar cells can generate electrical energy in form of Direct Current (DC). Generally, electrical appliances have used an Alternating Current (AC). Sequence, an inverter circuit is needed to convert electrical energy form DC to AC. This paper aim is to simulate an inverter performance of single-phase five-level using the method of modified Pulse Width Modulation (PWM). A scheme of the circuit model of single-phase five-level inverter was constructed to investigate their performance. The model was simulated by using of PSIM Software. The simulation parameters were set as a triangular wave frequency used 2 KHz. Then, the same phase was set as the carrier waves and a sinusoidal signal with a frequency of 50 Hz as a reference signal. The circuit scheme model used a switching frequency MOSFET gate as a power switch on the single-phase five-level inverter. The result indicated the simulation as an expectation to generate a constant of five level voltage and sinusoidal current output, which the harmonics values were small. Therefore, the inverter circuit scheme is safe to use for the AC electrical appliances.]]>
<![CDATA[Implementation of an IoT-Integrated Feedback Control System for Water Quality and Feeding Automation in Aquaculture ]]>
<![CDATA[Maharmi, Benriwati]]>;
<![CDATA[Fadli, Ilham]]>;
<![CDATA[Machdalena, Machdalena]]>;
<![CDATA[Syabriyana, Maliya]]>;
<![CDATA[Mirfaturiqa, Mirfaturiqa]]>
<![CDATA[ Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 2 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) ]]>
Publisher : <![CDATA[International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse) ]]>
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DOI: 10.36842/jomase.v69i2.547
<![CDATA[This study introduces an IoT-based automated system for freshwater aquaculture that enables real-time monitoring of water quality and control of fish feeding. The system utilizes an ESP32 microcontroller integrated with pH, ultrasonic, infrared, temperature, and RTC sensors to monitor pond conditions. A servo motor is used for feed dispensing, while a fluid and clean water pump adjusts pH levels automatically when they fall outside the optimal 6.5–8.5 range. Sensor data is sent to the cloud via the Blynk platform, allowing remote monitoring and notification through a mobile app. Laboratory and field tests over three days demonstrated a fast response time of 1.78 seconds, accurate feed monitoring, and stable pH control. The system offers an efficient, low-cost solution for small to medium-scale aquaculture.]]>
