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All Journal Rang Teknik Journal Menara Ilmu
Herris Yamashika
Universitas Muhammadiyah Sumatera Barat
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering

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PERHITUNGAN PARAMETER SCALED-DOWN UNTUK PERANGKAT KERAS MODEL SISTEM TENAGA LISTRIK Herris Yamashika; Mahyessie Kamil
Menara Ilmu Vol 14, No 1 (2020): Vol. XIV No. 1 Januari 2020
Publisher : LPPM Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/mi.v14i1.1732

Abstract

Abstract: This article provides reduced calculation parameters for power system transmission models. Transmission parameters modeled are single transmission lines using ACSR 1x241.7 mm2 (Hawk), with parameter values of 0.129 ī— / km for resistance, 0.4049 km / km for reactance, and admission of 2.533 33S / km. Minimized parameters are calculated using current, voltage, impedance, and power scale factors. A 150 kV transmission line with a current capacity of 100 A at 50 Hz system frequency, scaled to a voltage of 15 V and 5 A. The results obtained from the calculation are scaled down to 0.258 mī— / km for resistance, 0.81 mī— / km for reactance, and admintance 1.27 mS / km. The load is connected to a 20 kV system with a current capacity of 500 A, and scaled to 2 V and 5 A. The reduced impedance value obtained is 0.02887ī— for active power, and 1.2252 mH for reactive power. Keywords: lower scale model, electric power system model, electric power system
RANCANG BANGUN SCALED DOWN MODEL SISTEM DISTRIBUSI TENAGA LISTRIK Herris Yamashika; Mahyessie Kamil
Rang Teknik Journal Vol 5, No 1 (2022): Vol. 5 No. 1 Januari 2022
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1374.208 KB) | DOI: 10.31869/rtj.v5i1.3069

Abstract

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PEMANFAATAN SINYAL PUTARAN GENERATOR DARI DCS UNTUK PENGGANTIAN SPEED RELAY ELEKTRO MEKANIK PADA SISTEM EKSITASI GENERATOR HIDRO Mustaqimul Hadi; Fikri Wahyudi; Herris Yamashika
Rang Teknik Journal Vol 9, No 1 (2026): Vol. 9 No. 1 Januari 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i1.7621

Abstract

The Maninjau Hydroelectric Power Plant (HEPP) faces technical challenges in its generator excitation system due to failures in the Type 13 electromechanical speed relay, a critical component in the excitation start-up sequence. This relay has not only lost accuracy but is also obsolete and difficult to procure in the market. Its malfunction poses the risk of excitation sequence failure, which may lead to damage in the Automatic Voltage Regulator (AVR), voltage meter disturbances, and even complete unit start-up failure.This study aims to replace the function of the electromechanical speed relay with a system utilizing generator rotational speed signals available through the Distributed Control System (DCS). The Root Cause Problem Solving (RCPS) method, field observation, and priority matrix analysis were employed to evaluate the most optimal replacement alternative. The results indicate that using a 24VDC relay based on signals from the Speed Sensor Gear (SSG) and digital signals from the DCS provides the best solution. The new system enables a more precise excitation process, easier installation, improved safety, as well as real-time monitoring and full integration with digital control systems.The implemented modification demonstrates that the excitation system becomes more reliable and efficient, effectively overcoming the previously frequent excitation sequence failures. Furthermore, the system is considered more economical and universal, while ensuring compatibility with future developments in digital-based power plant technology. Overall, this research makes a significant contribution to the modernization of hydroelectric control systems, in line with the sustainable and technology-driven development of national power infrastructure.Keywords: Speed Relay, DCS, Excitation System, Hydroelectric Power Plant, Generator Rotational Speed, Control Modernization
PENINGKATAN SAVING KWH DAN PENEKANAN SUSUT NON-TEKNIS MELALUI OPTIMALISASI P2TL DI PT PLN (PERSERO) ULP MUARA TEBO Mardini Hasanah; Pipit Puspitasari; Surya Ramadan; Herris Yamashika
Rang Teknik Journal Vol 9, No 1 (2026): Vol. 9 No. 1 Januari 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i1.7622

Abstract

Electricity is an essential need in almost all human activities, making it a vital component of everyday life. However, in the process of distributing it to customers, there is often a difference between the energy delivered and the energy sold, known as energy loss or shrinkage. This shrinkage can be categorized into two types, namely technical and non-technical shrinkage. PT PLN (Persero) uses the Jogja formula to map and analyze these two types of shrinkage, allowing a percentage comparison between technical and non-technical shrinkage. The focus of this research is on efforts to overcome non-technical shrinkage, especially in Muara Tebo ULP. PT PLN (Persero) implements preventive measures, including public education on the efficient and safe use of electrical energy, as well as the routine implementation of the Electricity Usage Control (P2TL). The purpose of these measures is to reduce non-technical losses that occur in the use of electricity. The results of the P2TL implementation in ULP Muara Tebo showed an increase in average kWh generation from 193,193 kWh in the January to May period to 216,582 kWh in June. This increase contributed significantly to the reduction of total shrinkage by 2.51% in June. This research confirms that a structured enforcement and education strategy can effectively improve energy distribution efficiency and reduce non-technical losses, supporting the overall operations of PT PLN (Persero).Keywords: energy loss, non-technical loss, formula jogja, P2TL
Co-Authors Fikri Wahyudi Mahyessie Kamil Mardini Hasanah Mustaqimul Hadi Pipit Puspitasari Surya Ramadan