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All Journal Journal of Applied Agricultural Science and Technology Jurnal Elektrik
Nurhidayanti Nurhidayanti
Politeknik Negeri Ujung Pandang
Agriculture, Biological Sciences & Forestry Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Analisis Penempatan Recloser Terhadap Keandalan Sistem Tenaga Listrik Di ULP Sungguminasa Nurhidayanti Nurhidayanti
Jurnal Elektrik Vol. 1 No. 2 (2022): Vol.1 No.2 1 Desember 2022
Publisher : Jurusan Teknik Elektro - Politeknik Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65485/elektrik.v1i2.443

Abstract

Pada skripsi Ini dilakukan analisis penempatan recloser terhadap keandalan sistem tenaga listrik di ulp sungguminasa khususnya di penyulang Tamarunang.Tujuan dari peneilitian ini yaitu untuk menentukan penentuan recloser yang baik pada penyulang Tamarunang guna untuk meningkatkan keandalan pada penyulang tersebut. Setelah melakukan perhitungan secara manual dengan menggunakan metode Failur Modes And Effect Analysis (FMEA) nilai SAIDI 24,1Jam/tahun, SAIFI 3,2 kali/tahun,dan CAIDI 7,2 jam/pelanggan. Kemudian dilakukan simulasi pada Software Etap 12.6, sebelum penempatan recloser nilai SAIFI yang di peroleh pada simulasi etap yaitu 2,0617 kali/tahun , SAIDI 24,9226 jam/tahun, maka dari itu nilai SAIFI sudah memenuhi standar sedangkan untuk nilai SAIDI belum memenuhi  SPLN. Kemudian setelah dilakukan penambahan recloser yang memisalkan 2 skenario pada beberapa titik maka diperoleh nilai SAIDI,SAIFI, dan CAIDI mengalami perubahan nilai, nilai SAIDI, SAIFI dan CAIDI terkecil yaitu pada lokasi REC4 + DCC1. Kata kunci : Penempatan recloser, FMEA, Keandalan, Software ETAP..
Morphological Degradation of Sago Starch (Metroxylon sp.) Bioplastic of Palopo, South Sulawesi Pria Gautama; Budiawan Sulaeman; Nurhidayanti Nurhidayanti
Journal of Applied Agricultural Science and Technology Vol. 9 No. 4 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i4.501

Abstract

The growing concern over non-organic plastic waste has driven the development of bioplastics from renewable sources, such as sago starch (Metroxylon sp.), as an environmentally friendly alternative. This study aims to analyze the morphological structural changes of sago starch bioplastics exposed to UV radiation using Scanning Electron Microscopy (SEM). The bioplastics were prepared from sago starch, subjected to controlled UV irradiation, and subsequently examined with SEM to observe microstructural modifications. The results demonstrate that UV radiation significantly induces degradation and structural alterations, characterized by increased surface roughness, and changes in the fracture structure and cross-section of the bioplastic. SEM images show the progression of structural damage at various UV exposure times (24, 48, and 72 hours), illustrating the formation of cracks, micro-cavities, and increased porosity. These findings underscore the importance of understanding UV degradation for developing more environmentally resistant sago bioplastics.
Co-Authors Budiawan Sulaeman Pria Gautama