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Evaluasi Kinerja Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) Desa Tepal, Kabupaten Sumbawa pada Kondisi Beban Puncak Afrianto; Hadi, Mukhtar; Anggara, Mietra; Syaukani, Imam; Kencana, Putri Indah
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 3 (2025): November 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i3.1320

Abstract

Penelitian ini bertujuan untuk mengevaluasi kinerja Pembangkit Listrik Tenaga Mikrohidro (PLTMH) Desa Tepal, Kabupaten Sumbawa, yang menggunakan turbin crossflow, khususnya pada kondisi beban puncak. Metode penelitian menggunakan pendekatan deskriptif kuantitatif melalui pengukuran langsung parameter hidrolik dan elektrikal, meliputi debit air, tinggi jatuh efektif, tegangan, arus, frekuensi, serta kondisi beban generator tiga fasa. Daya teoritis dihitung berdasarkan parameter hidrolik dan efisiensi komponen sistem, sedangkan daya aktual ditentukan dari hasil pengukuran tegangan dan arus generator. Hasil penelitian menunjukkan bahwa pada debit aktual sebesar 0,03 m³/detik diperoleh daya listrik teoritis generator sebesar 5,73 kW, sementara hasil pengukuran lapangan menunjukkan daya listrik aktual mencapai 19,1 kW pada kondisi beban puncak. Ketidaksesuaian yang signifikan antara daya teoritis dan daya aktual ini mengindikasikan adanya keterbatasan dalam estimasi debit serta pengaruh dominan karakteristik beban, ketidakseimbangan arus antar fasa, dan sistem kendali beban terhadap kinerja pembangkit. Jika dibandingkan dengan potensi daya berdasarkan debit desain turbin, PLTMH Desa Tepal belum beroperasi pada kondisi optimal. Hasil penelitian ini memberikan dasar evaluasi untuk perbaikan sistem kendali dan pengelolaan beban PLTMH agar operasi pembangkit lebih efisien dan andal.   This study aims to evaluate the performance of the Micro Hydropower Plant (MHP) in Tepal Village, Sumbawa Regency, which utilizes a crossflow turbine, particularly under peak load conditions. The research method employs a quantitative descriptive approach through direct measurements of hydraulic and electrical parameters, including water discharge, effective head, voltage, current, frequency, and the load conditions of a three-phase generator. The theoretical power is calculated based on hydraulic parameters and system component efficiencies, while the actual power is determined from measured generator voltage and current. The results show that at an actual discharge of 0.03 m³/s, the theoretical electrical power of the generator is 5.73 kW, whereas field measurements indicate that the actual electrical power reaches 19.1 kW under peak load conditions. The significant discrepancy between theoretical and actual power indicates limitations in discharge estimation as well as the dominant influence of load characteristics, phase current imbalance, and the load control system on plant performance. When compared to the power potential based on the turbine design discharge, the Tepal Village MHP has not yet been operating under optimal conditions. These findings provide a basis for evaluating improvements in the load control system and load management to ensure more efficient and reliable plant operation.  
THE EFFECT OF GENRE-BASED APPROACH ON IMPROVING SENIOR HIGH SCHOOL STUDENTS’ WRITING ABILITY ON NARRATIVE TEXT Azzahra Mahendra, Arundina; Afrianto; Dahnilsyah
International Journal of Educational Best Practices Vol. 9 No. 2 (2025)
Publisher : Prodi Administrasi Pendidikan Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ijebp.9.2.42-49

Abstract

This study investigates the Genre-Based Approach (GBA) in improving the narrative writing performance of high school students. This study uses a pre-experimental pre-test-post-test design involving 30 eleventh-grade students from SMA Negeri 1 Pinggir. The intervention was implemented through four sessions following the stages of the Genre-Based Approach: Building Knowledge about the Field, Text Modeling, Joint Text Construction, and Independent Text Construction. Students' writing performance was evaluated in five components: content, organization, grammar, vocabulary, and mechanics, using an assessment rubric. The data were analyzed using the Shapiro Wilk test and paired sample t-test through SPSS version 26. The results revealed a statistically significant increase in students' writing scores (p = 0.000; t = -10.667), with the largest increase observed in content and vocabulary. These findings confirm that GBA effectively improves students' ability to generate and organize ideas coherently in the narrative genre. This study contributes to the growing body of research supporting process- and genre-based teaching in the context of English as a Foreign Language (EFL) and recommends the wider application of GBA in secondary school writing classes in the Indonesian Merdeka Curriculum.