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All Journal JISTech (Journal of Islamic Science and Technology) International Journal of Research in Vocational Studies (IJRVOCAS) International Journal of Economic, Technology and Social Sciences (Injects)
Juli Iriani
Politeknik Negeri Medan
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SISTEM PENGATURAN NILAI KEMIRINGAN PANEL SURYA DALAM PENINGKATAN KINERJA OUTPUT PANEL SURYA TERMONITORING INTERNET OF THINGS Abdullah Abdullah; Maharani Putri; Juli Iriani; Fitria Nova Hulu; Cholish Cholish; Masthura Masthura
JISTech (Journal of Islamic Science and Technology) Vol 7, No 2 (2022)
Publisher : UIN Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/jistech.v7i2.14178

Abstract

Penggunaan panel surya banyak dimanfaatkan masyarakat karena mampu bekerja menyerap energi matahari untuk menghasilkan sumber energi listrik, akan tetapi pergerakan panel surya kearah cahaya matahari masih bersifat manual (dibantu dengan manusia). Sistem terintegrasi Internet of Things bertujuan untuk memantau kerja dari panel surya dengan cara memperlihatkan sistem monitoring jarak jauh yang memanfaatkan jaringan internet. Variabel yang dimonitoring yaitu varibel pergerakan panel surya yang terdiri dari nilai tegangan analog, intensitas cahaya matahari, nilai kemiringan, posisi dan kondisi cuaca panel surya. Pada pengujian sudut pergerakan motor pengaturan derajat kemiringan dapat diatur pada posisi maksimal cahaya matahari. Posisi maksimal didapat sebesar 125o sejalan dengan intensitas cahaya yang didapat sebesar 1680 Lux, menghasilkan tegangan rata-rata sebesar 20,22 V, arus sebesar 2,10 A dan daya sebesar 43,07 W.
Design of Earthquake Warning Alarm Using Accelerometer Sensor Based on Internet of Things Gunoro; Suprapto; Juli Iriani; Bakti Viyata Sundawa; Abdullah; Cholish
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 3 No. 1 (2023): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v3i1.194

Abstract

Earthquake is natural event due to release of energy suddenly from within that creates seismic waves. The vibrations are usually caused by movement of earth's plates. It cannot be predicted when they are coming. Therefore, need to build an early warning system. It is for anticipation of save the community when an earthquake occurs. It provides solutions to minimize the impact of earthquake events. This system uses accelerometer sensor and arduino nano as a main controller and it is accompanied by Blynk application. This works for sent notification via smartphone. This tool has been successfully designed with manual testing to be able to see the sensitivity of earthquake sensor made. Accelerometer sensor works is using Tilt Method. Accelerometer sensor will tilt on surface as parable of earthquake. Accelerometer sensor will send vibration signal when earthquake occurs. Signal processing is done by Arduino nano as the main controller in system. If the signal is received by sensor then value of earthquake will be displayed on LCD screen. Status of earthquake was separated into 4 levels such as standby, alert, dangerous, dangerous and dangerous. After earthquake value appears on the LCD screen and the status is known then buzzer will sound. It indicates that the earthquake warning alarm is properly functioning. Next, NodeMCU also sends information to Blynk application, which is used as a notification and monitoring of earthquake conditions. Buzzer will sound as a warning alarm to notify peoples to save themselves. This sensor has three output coordinate points, namely X, Y, Z, which have analog values ​​on Arduino Nano. This analog value can be converted into Richter Scale. Based on experimental results, an analog value is 100 – 400.
Anomalies in the 110 VDC System at PT. PLN (Persero) Transmission Service Unit and Binjai Substation Gunoro; Juli Iriani; Dian Anggina Thamrin; Cholish; Abdullah
International Journal of Economic, Technology and Social Sciences (Injects) Vol. 3 No. 1 (2022): May 2022
Publisher : CERED Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (820.022 KB) | DOI: 10.53695/injects.v3i1.631

Abstract

Anomalies in the DC system, both in the rectifier and the battery, will occur sooner or later, and the cause is equipment age, maintenance, and fault. The purpose of this study was to determine the anomaly that occurred in the 110 VDC system at PT. PLN ULTG Binjai. The research method is to observe, examine and measure the DC system. The research was carried out at the Paya Geli Substation and Pangkalan Brandan Substation. From the results of the study, it was found that the anomaly that occurred in the 110 VDC system at ULTG Binjai was the final voltage per battery cell which was less than 1 volt, namely the battery cell numbers 1, 34 and 39 in the Payageli substation 2 bank battery. DC ground occurs in bank 1 at the Paya Geli substation with the negative side connected to ground, the positive side voltage to ground is 95.2 volts, while the voltage on the negative side to ground is 8.4 volts. The main fault (phase loss) anomaly at the Pangkalan Brandan substation was due to the burning of the input line in the rectifier control module, causing the rectifier to fail and the DC supply from the rectifier to be lost and temporarily supplied by the battery. Regular maintenance is required for reliability to avoid anomalies and immediately recondition if the battery capacity is less than 60% and the final voltage per battery cell is less than 1 volt.
Co-Authors Abdullah Bakti Viyata Sundawa Cholish Dian Anggina Thamrin Fitria Nova Hulu Gunoro Maharani Putri Masthura, Masthura Suprapto Widodo