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INTEGRASI HIDRO, ANGIN, SURYA, DAN PENYIMPANAN ENERGI DALAM SISTEM KELISTRIKAN RENDAH KARBON: TINJAUAN KOMPREHENSIF ATAS FLEKSIBILITAS, OPTIMASI OPERASI, DESAIN TEKNO-EKONOMI, DAN ARAH RISET TERKINI Aswin; Lanto Mohamad Kamil Amali; Burhan Liputo
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v4i1.69

Abstract

The transition to a low-carbon electricity system is driving the strategic role of hydropower, both as a manageable renewable generator and as the backbone of system flexibility to accommodate the intermittency of wind and solar energy. In recent years, the evolution of studies is no longer limited to conventional reservoir operations but has expanded to hybrid hydro–wind–photovoltaic systems, pumped hydro energy storage (PHES), hydro–PV–storage, hydro–hydrogen, and multi-energy configurations integrating compressed air energy storage (CAES) and liquid air energy storage (LAES). This review article synthesizes the literature to map recent developments on four main themes: (1) the role of hydropower flexibility in the integration of variable renewable energy (VRE), (2) modeling and optimization of multi-scale operations, (3) capacity design and techno-economic evaluation of storage technologies, and (4) issues of reliability, safety, ecology, and artificial intelligence (AI) for prediction and control. Recent literature indicates that coordinating hydro with wind, solar, and storage can increase renewable energy utilization, reduce curtailment, improve operational stability, and enhance economic benefits, particularly when operating models incorporate spatio-temporal correlations, hydraulic constraints, market mechanisms, and flexibility requirements. Gaps remain in multi-scale integration, the incorporation of ecological indicators into market optimization, standardization of economic evaluations, and field validation of intelligent control strategies.
PENGARUH KARAKTERISTIK TANAH DAN MATERIAL ELEKTRODA TERHADAP RESISTANSI PEMBUMIAN PADA KONDISI TANAH TROPIS Aditya Kisman; Lanto Mohamad Kamil Amali; Yasin Mohamad; Taufiq Ismail Yusuf
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v4i1.74

Abstract

Keandalan sistem tenaga listrik ditentukan oleh efektivitas sistem pembumian dalam mengalirkan arus gangguan secara aman ke tanah, yang sangat dipengaruhi oleh karakteristik tanah dan material elektroda. Penelitian ini bertujuan menganalisis pengaruh jenis tanah dan material elektroda terhadap nilai resistansi pembumian serta menentukan material yang paling efektif pada kondisi tanah tropis. Penelitian menggunakan pendekatan eksperimen komparatif yang dilaksanakan di empat lokasi di Kabupaten Bone Bolango yang merepresentasikan tanah berbatu, sawah, liat, dan pasir pesisir. Sampel penelitian terdiri atas empat jenis elektroda yaitu tembaga, kuningan, stainless steel, dan besi. Data dikumpulkan melalui pengukuran langsung menggunakan earth tester digital dengan metode fall-of-potential konfigurasi tiga titik pada kondisi geometris yang seragam, kemudian dianalisis secara deskriptif komparatif. Hasil penelitian menunjukkan bahwa nilai resistansi pembumian bervariasi menurut jenis tanah dan material elektroda. Resistansi terendah diperoleh pada elektroda tembaga di tanah pasir pesisir sebesar 0,84 Ω, sedangkan resistansi tertinggi terjadi pada elektroda besi di tanah berbatu sebesar 959 Ω. Tanah dengan kelembapan dan kandungan ion tinggi cenderung menghasilkan resistansi lebih rendah, sedangkan material dengan konduktivitas listrik lebih tinggi menunjukkan kinerja pembumian yang lebih baik. Tembaga secara konsisten memberikan nilai resistansi terendah pada seluruh jenis tanah, diikuti kuningan, stainless steel, dan besi. Secara umum material tembaga direkomendasikan sebagai material paling optimal untuk aplikasi lapangan pada kondisi tanah tropis
ANALISIS HOTSPOT DAN VALIDASI PENGUKURAN THERMOVISI PADA PERALATAN GARDU INDUK TRANSMISI. Rival Septian; Yasin Mohamad; Taufiq Ismail Yusuf; Lanto Mohamad Kamil Amali
Journal Of Renewable Energy Engineering Vol. 4 No. 1 (2026): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v4i1.75

Abstract

Thermal monitoring of transmission equipment is an essential component in maintaining the reliability, continuity, and efficiency of electric power systems, particularly for substation equipment that operates continuously under high loading and open-environment exposure. This study aims to analyze hotspot phenomena while simultaneously evaluating the reliability of thermovision measurements on Main Transmission Equipment at Bay GT of the Anggrek Substation. The research employed a quantitative descriptive approach through direct field measurements using thermovision under peak-load conditions. The results show that Bay GT 1 exhibited higher thermal characteristics than Bay GT 2, with maximum clamp temperatures of 33.2 °C and 27.6 °C, respectively. Several points in both bays recorded ΔT values greater than 10 °C, indicating the presence of localized thermal anomalies. Emissivity values ranged from 0.47440 to 0.53377 for Bay GT 1 and from 0.51073 to 0.56425 for Bay GT 2, suggesting that the material condition remained relatively stable. Validation results further showed precision levels of 0.6% and 0.5%, with corresponding accuracy values of 98.7% and 91.9%.