Nurmela
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The Application of English Conversation Pocket Book in Teaching Students' Speaking Skill ( A Descriptive Qualitative Study at MTS ja-alhaq Bengkulu City in the Academic Year 2021/2022) Nurmela; Rizal, Syamsul; Utami, Valisneria
JPT : Jurnal Pendidikan Tematik Vol 3 No 3 (2022): Desember
Publisher : Yayasan Darussalam Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62159/jpt.v3i3.646

Abstract

Speaking is the most important skill among the four language skill in order to communicate well in this globalized world, especially speaking in English. The data collected by the researcher shows that there are some problems with learning speaking skills. Some of these problems are, students lack confidences in speaking English, students have difficulty in pronouncing English correctly, students are lazy to memorize English vocabulary, and students are less interested in learning English. learn English. With the problems faced by these students, in 2020 the MTs ja-alhaq school launched a pocket book for foreign language conversations which was used as an aid medium in learning students' speaking skills. This conversation pocket book is used during the foreign language development institute program. Foreign language development institutes are programs that study foreign languages. The result from this study is the application of an English conversation pocket book in teaching speaking skills in class VIII MTs Ja-Alhaq the English conversation pocket book has a positive response because it really help the teacher and students in the process of leaning a foreign language, especially English, even though the teacher has obstacles in the learning process.
ANALISIS DAMPAK PENETRASI TINGGI PLTS TERHADAP RESPONS FREKUENSI PADA SISTEM TRANSMISI INTERKONEKSI Nurul Muhammad Farouq; Nurmela
Jurnal Riset Multidisiplin Edukasi Vol. 3 No. 6 (2026): Jurnal Riset Multidisiplin Edukasi (Juni 2026)
Publisher : PT. Hasba Edukasi Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71282/jurmie.v3i6.2169

Abstract

The integration of Solar Photovoltaic (PV) power plants into power systems has become one of the main strategies to support Indonesia’s energy transition targets as outlined in the 2025–2034 Electricity Supply Business Plan (RUPTL). One of the planned projects is a 126 MW PV power plant that will be connected to the 150 kV Central Kalimantan transmission system. Although it increases the utilization of renewable energy, high PV penetration may affect system frequency response due to the reduced contribution of synchronous generator inertia. This study aims to analyze the impact of PV integration on system frequency response using Root Mean Square (RMS) simulations in DIgSILENT PowerFactory. The evaluation was conducted through PV disconnection scenarios at penetration levels of 25%, 50%, 75%, and 100%, as well as the outage of the largest generating unit. The results show that increasing PV penetration decreases the frequency nadir from 49.944 Hz to 49.778 Hz and increases the Rate of Change of Frequency (RoCoF) from 0.530 Hz/s to 2.154 Hz/s. In the largest generator outage scenario, RoCoF increases from 1.199 Hz/s to 1.257 Hz/s without significant changes in the other frequency response parameters. The results indicate that the integration of the 126 MW PV power plant can still be accommodated by the 150 kV Central Kalimantan system without significant degradation of frequency response performance.
OPTIMASI PENEMPATAN DISTRIBUTED GENERATION UNTUK MEMPERBAIKI PROFIL TEGANGAN PADA SISTEM DISTRIBUSI 20 KV MENGGUNAKAN VOLTAGE SENSITIVITY INDEX (VSI) Rafi Maulana; Sutisna; Lindah Faridah; Nurmela
Jurnal Riset Multidisiplin Edukasi Vol. 3 No. 7 (2026): Jurnal Riset Multidisiplin Edukasi (Juli 2026)
Publisher : PT. Hasba Edukasi Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71282/jurmie.v3i7.2475

Abstract

Meningkatnya kebutuhan energi listrik di Pulau Nusa Penida menyebabkan penurunan profil tegangan pada beberapa penyulang jaringan distribusi 20 kV sehingga diperlukan upaya untuk meningkatkan kualitas tegangan melalui integrasi Distributed Generation (DG). Berdasarkan Rencana Usaha Penyediaan Tenaga Listrik (RUPTL) 2025–2034, PT PLN (Persero) merencanakan pembangunan Pembangkit Listrik Tenaga Surya (PLTS) berkapasitas 4,5 MW sebagai DG di Nusa Penida. Namun, penempatan DG yang tidak tepat dapat mengakibatkan permasalahan seperti aliran daya balik dan ketidakstabilan tegangan. Penelitian ini bertujuan menganalisis kondisi profil tegangan sebelum penempatan DG, menentukan lokasi optimal penempatan DG menggunakan metode Voltage Sensitivity Index (VSI), serta menganalisis pengaruh penempatan DG terhadap perbaikan profil tegangan pada sistem distribusi 20 kV Nusa Penida. Penelitian dilakukan menggunakan perangkat lunak DIgSILENT PowerFactory melalui simulasi aliran daya (load flow analysis) dengan tahapan pemodelan sistem berdasarkan data aktual PT PLN (Persero), analisis kondisi eksisting, perhitungan VSI untuk menentukan lokasi optimal, serta pengujian variasi kapasitas DG sebesar 15%, 30%, 45%, 60%, 75%, dan 90% dari beban maksimum penyulang dengan total kapasitas tetap mengacu pada RUPTL sebesar 4,5 MW. Hasil penelitian menunjukkan bahwa penyulang Bunga Mekar, Ceningan, dan Ped merupakan penyulang yang mengalami penurunan profil tegangan paling signifikan. Berdasarkan perhitungan VSI diperoleh lokasi optimal penempatan DG yaitu pada Bus Bunga Mekar 1 dan Bus Bunga Mekar 2, Bus Ceningan 4, Bus Ceningan 5, Bus Ceningan 6, serta Bus Ped 3. Variasi kapasitas DG yang menghasilkan perbaikan profil tegangan terbaik adalah sebesar 75% pada Bus Bunga Mekar 1, 90% pada Bus Bunga Mekar 2, 90% pada Bus Ceningan 4, 90% pada Bus Ceningan 5, 45% pada Bus Ceningan 6, dan 90% pada Bus Ped 3 dengan total kapasitas 4,5 MW. Setelah penempatan DG pada lokasi dan kapasitas tersebut, profil tegangan pada seluruh bus yang dianalisis meningkat dan berada dalam batas standar operasi sistem distribusi sebesar 0,90–1,05 p.u. Hasil penelitian ini menunjukkan bahwa metode VSI efektif digunakan untuk menentukan lokasi optimal DG dan mampu meningkatkan kualitas profil tegangan di sistem distribusi 20 kV Nusa Penida, sehingga dapat menjadi referensi dalam pengembangan integrasi pembangkit energi terbarukan pada jaringan distribusi.