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All Journal Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) VANOS Journal of Mechanical Engineering Education Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal TEMAPELA Journal of Vocational Education Studies (JOVES) Jurnal Abdi Insani International Journal of STEM Education for Sustainability Indonesian Research Journal on Education TOFEDU: The Future of Education Journal
Ricky Cahyasari Putra
Universitas Sultan Ageng Tirtayasa, Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Turbine Governing System at PT PLN Indonesia Power PLTU Banten 2 Labuan Esa Mi'rajuddin, Septa; Supriyatna, Deddy; Putra, Ricky Cahyasari
The Future of Education Journal Vol 5 No 1 (2026): #2 IN PROGRESS
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Yayasan Pendidikan Tumpuan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61445/tofedu.v5i1.1686

Abstract

This study aims to analyze the performance of the Turbine Governing System in a 100 MW steam turbine in maintaining power system frequency stability through the regulation of the steam chest, governor valve, and Emergency Stop Valve (ESV) under load variations of ±10% from the nominal power. The research employs a descriptive quantitative approach based on literature studies, supported by dynamic modeling and system response simulations under a droop configuration of 4–5%. The results show that a 10% load increase causes an initial frequency deviation of 0.18–0.22 Hz from the nominal 50 Hz, with an initial governor valve response time of 0.25–0.35 seconds and a settling time of 4–6 seconds, which remain within the standard operational limits of power systems. A 4% droop configuration produces a faster frequency response but with greater power overshoot (5–6%), while a 5% droop configuration provides better power stability with lower overshoot (3–4%), indicating a trade-off between response speed and system stability. The steam chest dynamic analysis reveals that an increase in the steam pressure time constant can slow frequency recovery by up to 18–22%. Under extreme disturbance conditions, the ESV is capable of closing within 0.15–0.20 seconds, effectively preventing turbine overspeed. These findings highlight that frequency stability is determined not only by the generating capacity of the power plant but also by the quality of dynamic response and the integrated coordination among the steam chest, governor valve, and ESV. This coordination becomes increasingly strategic in supporting the flexibility and reliability of power systems amid the growing penetration of renewable energy.
Psychometric Validation of a STEAM-Based Knowledge Instrument for Measuring Energy Conversion Concepts in Fifth-Grade Students Ikhsanudin, Ikhsanudin; Putra, Ricky Cahyasari; Janata, Ade Dwi Putra; Febriyanto, Rusdi; Putra, Ananda Yhuto Wibisono; El Islami, R. Ahmad Zaky; Alasa, Victor M.; Camara, Jun S.; Triplett, William J.
International Journal of STEM Education for Sustainability Vol 6, No 2 (2026)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v6i2.762

Abstract

This study aimed to develop and validate the quality of a multiple-choice instrument for measuring fifth-grade elementary students' understanding of kinetic-to-electrical energy conversion concepts within a STEAM (Science, Technology, Engineering, Arts, and Mathematics) framework. The research employed a Design and Development Research (DDR) approach with systematic instrument development procedures comprising: literature review and blueprint development, item construction, expert validation, field testing with 28 fifth-grade students, and comprehensive psychometric analysis. The instrument consists of 20 multiple-choice items covering three knowledge dimensions: conceptual (5 items), procedural (10 items), and applicative (5 items). Content validity was established through expert review by three science education specialists, yielding a Content Validity Index (CVI) of 0.87. Item analysis revealed difficulty indices ranging from 0.35 to 0.85 (predominantly moderate difficulty) and discrimination indices ranging from 0.30 to 0.75 (good to excellent discrimination). Reliability analysis using Cronbach's alpha produced a coefficient of 0.82, indicating high internal consistency suitable for elementary school assessment contexts. The instrument demonstrates satisfactory psychometric properties aligned with standards for elementary science assessment and effectively integrates STEAM pedagogical approaches.
Student Cognitive Analysis in STEAM-Based Pre-Vocational Experiential Learning at the Elementary Level Febriyanto, Rusdi; Janata, Ade Dwi Putra; Putra, Ananda Yhuto Wibisono; Putra, Ricky Cahyasari; Ikhsanudin, Ikhsanudin; El Islami, R. Ahmad Zaky; Bien, Nguyen Van; Akdemir, Ahmet Selçuk
International Journal of STEM Education for Sustainability Vol 6, No 2 (2026)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v6i2.758

Abstract

The Making Indonesia 4.0 program requires an educational system that fosters transdisciplinary, contextual, and practical learning to improve technical literacy and promote environmental sustainability. This study is aimed to assess the effectiveness of STEAM-based pre-vocational experiential learning in improving the cognitive abilities of primary school children. This study employed a quantitative, quasi-experimental One-Group Pretest-Posttest design. The study involved 27 fifth-grade primary school students selected through a purposive sampling technique. The results showed that the average pre-test score for students was 54.70, and most of them fell into the medium range (51–75). After STEAM-based learning was put into place, the average score on the post-test went up to 72.66, and most students moved up to the high group (76–100). According to Hake's criteria (1999), the N-Gain analysis showed an average value of 0.40, which means it was moderate. The Paired Sample t-Test also showed a significance value of p = 5.75 × 10⁻⁷ (0.05), which means that the learning outcomes improved in a statistically significant way. Thus, it can be deduced that STEAM-oriented pre-vocational experiential learning is comparatively beneficial in augmenting students' cognitive abilities. This method positively influences learning outcomes descriptively and is empirically validated, rendering it pertinent for use as a contextual learning technique to enhance 21st-century capabilities in primary education.
Co-Authors Aam Hamdani, Aam Ade Dwi Putra Janata Akdemir, Ahmet Selçuk Alasa, Victor M. Ananda Yhuto Wibisono Putra Asmoro, Cahyo Puji Bien, Nguyen Van Camara, Jun S. Esa Mi'rajuddin, Septa Febriyanto, Rusdi Hamid Abdillah Hendri Sulistyo Ikhsanudin Ikhsanudin Iman, Atep Moh Fawaid Mokhamad Syaom Barliana Mumu Komaro Mutaufiq Mutaufiq Nurholisoh, Nurholisoh Prasstiawan, Sahrul R. Ahmad Zaky El Islami Supriyatna, Deddy Triplett, William J.