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All Journal JURNAL NASIONAL TEKNIK ELEKTRO Jurnal Polimesin
Andi Mulkan
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Automotive Engineering Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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The Reconfiguration of Network at 20 kV Distribution System Nagan Raya Substation with the Addition of the Krueng Isep Hydroelectric Power Plant Ediwan Ediwan; Muliadi Muliadi; Mahalla Mahalla; Nazaruddin Nazaruddin; Andi Mulkan
JURNAL NASIONAL TEKNIK ELEKTRO Vol 10, No 2: July 2021
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (416.864 KB) | DOI: 10.25077/jnte.v10n2.888.2021

Abstract

Switching substations are usually supplied from one express feeder which can cause a low level of reliability due to disruption or outage on the express feeder. Also, the lack of power supply at the ends of the network causes voltage drops. One way to solve this problem is to reconfigure the network. In this study, testing was carried out on a distribution system in the Nagan Raya Regency, namely the distribution system of PT. PLN (Persero) ULP Jeuram originally had a radial system. Furthermore, the distribution system was reconfigured with the Krueng Isep hydroelectric power plant which was included in the PLN ULP Jeuram grid so that the system that was originally radial became a loop configuration. The method used in analyzing the network reconfiguration process is to use the ETAP 12.6 application. As a result, after reconfiguring the network the voltage increased from 19.2 kV to 20.7 kV, the highest increase was at the Beutong Substation which reached 1.5 kV and decreased power losses in the network with a total of 188.2 kW and 263.1 kVAR. Furthermore, before the network reconfiguration, ULP Jeuram SAIFI value was 22.25 times/customers and SAIDI values 1337.74 minutes/ customers. However, after reconfiguring the network, ULP Jeuram SAIFI value fell to 15.39 times/customers and SAIDI to 945.6 minutes/customers, resulting in an increase in system reliability by 70.69%.Keyword: Reconfiguration of network, distribution system, hydroelectric power plant, SAIDI, SAIFI 
Pengaruh penggunaan blower pada kolektor surya sebagai alat alternatif untuk meningkatkan kualitas hasil pengeringan biji kopi di daerah Aceh Andi Mulkan; Teuku Zulfadli
Jurnal POLIMESIN Vol 19, No 1 (2021): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i1.2023

Abstract

Naturally drying in the sun takes a very long time and product hygiene is also an obstacle because usually drying is done on open land. Using natural heat transfer, the time required for the coffee bean drying process ranges from 12-20 hours. The study describes a solar collector as an alternative device for drying in resulting coffee bean products with more hygienic without being exposed to dirt or bacteria. Shorter processes in which the quality of coffee beans increased were expected. The method used in this research is to analyze the heat absorption ability of the absorber using aluminium material which has been previously painted and the use of an air blower. The temperature inside was taken at thirty-minute intervals. Measurement of the mass of coffee beans was measured every 1-hour using digital scales. Similarly, mass and moisture content were also measured every 1 hour. From the results, it shows that the use of a blower with an airflow rate of 3.65 m/s with an average temperature of 56 ℃ can reduce the moisture content by 25.5%. For an air velocity of 4.55 m/s with an average temperature of 54.2 ℃, the moisture content reduces as much as 24.52%. Furthermore, for an airflow rate of 4.95 m/s with an average temperature of 52.7 ℃, the moisture decreased by 21.78% within 4 hours
Co-Authors Anak Agung Gede Sugianthara Ediwan Ediwan Mahalla, Mahalla Nazaruddin, Nazaruddin Teuku Zulfadli