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All Journal International Journal of Applied Power Engineering (IJAPE) JET (Journal of Electrical Technology) Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC)
Hardi, Supri
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Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering

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Innovation of control valve motorization method for regulating turbine rotation in micro hydro generators Hardi, Supri; Safitri, Nelly; Yaman, Yaman; Radhiah, Radhiah; Jamaluddin, Jamaluddin
International Journal of Applied Power Engineering (IJAPE) Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijape.v14.i1.pp90-100

Abstract

The method of transferring the main load to the dummy load is still used in micro hydropower plants. Because the turbine and generator are constantly operating at maximum capacity, the load transfer system, also known as the electronic load control (ELC) system, is ineffective and inefficient. The researcher devised a method for controlling the pressure/flow rate on the branch pipe by using a control valve motorized (CVM). Control valve motorized (CVM) is responsible for the opening and closing of branch pipelines using an electric motor. The goal is to achieve voltage and frequency stability by using CVM to adjust the flow/pressure of water in the branch pipe. The method involves designing and testing the CVM system via a Pelton turbine module connected to the generator. The results of testing the Pelton turbine module with a pressure of 4 kg/cm2 on a 34-inch pipe show that the turbine rotates at 800 rpm. Brushless direct current (BLDC) generator with 12 poles and a Pelton turbine. The proportional integral derivative (PID) controller control parameters are calculated by the control system using the Nichols-Ziggler method, with tuning results of PB 130%, Ti 2.8 seconds, and Td 0.7 seconds. A frequency of 50 Hz and a voltage of 61 volts is produced by controlling the set point (SP) at 55% of the process variable (PV) and the manipulated variable (MV) to CVM at 38%, respectively. The conditions are implemented by varying the load on the system by connecting and disconnecting the load; the system remains stable for 5 seconds.
Sistem Pengendali Tegangan pada Generator Induksi 3 Phasa Menggunakan Kontrol PI Abubakar, Said; Hardi, Supri; Alfayumi, Rizal
JET (Journal of Electrical Technology) Vol 2, No 3 (2017): JET Edisi Oktober
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/jet.v2i3.234

Abstract

Pada umumnya Pembangkit Listrik Tenaga Mikrohidro (PLTMh) banyak memanfaatkan motor induksi sebagai generator induksi karena cukup menggunakan energi terbarukan seperti air dan angin sebagai penggerak (Prime over) dan tidak banyak membutuhkan perawatan. Permasalahan generator induksi adalah apabila dibebani tegangannnya akan turun dan apabila terjadi pengurangan beban, maka tegangan akan naik. Tujuan penelitian ini adalah menstabilkan tegangan pada generator induksi 3 phasa 1 Kw 4 kutub menggunakan kontrol PI dengan cara menentukan parameter dan respon yang tepat. Metode yang digunakan dalam penelitian ini adalah metode pengujian dan pengukuran untuk mendapatkan parameter kendali Kp dan Ti berdasarkan metode Ziegler-Nichols. Hasil pengujian dengan mentuning kurva S didapat nilai Tu = 0,3 detik dan Tg = 2 detik serta parameter Kp = 6 dan Ti = 0,99. Respon kendali penstabil tegangan maksimal 25 detik dengan penambahan dan pengurangan beban sebesar 60 Watt. Tegangan stabil 200 VAC, frekuensi 50 Hz, dan kecepatan generator konstan 1538 Rpm.
Performance Comparison of Pure and Modified Sine Wave Inverters in an Off-Grid PV System Safitri, Nelly; Syahputra, Rudi; Hardi, Supri; Jalil, Saifuddin Muhammad
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 8, No 1 (2026): February
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v8i1.3810

Abstract

This study evaluates the performance of Pure Sine Wave (PSW) and Modified Sine Wave (MSW) inverters within small-scale off-grid solar power generation systems. The assessment was conducted utilizing a 160 Wp monocrystalline solar panel, a 10 A solar charge controller (SCC), a 12.8 V–100 Ah lithium iron phosphate (LiFePO₄) battery, along with both 500 W PSW and MSW inverters, across varying panel tilt angles ranging from 45°-165°. The findings indicated that the PSW inverter delivered a more consistent output voltage between 221 and 222 V, exhibiting minimal fluctuation of ±1 V and low harmonic distortion at 2.5%. The MSW inverter produced an output voltage between 222 and 225.5 V, characterized by greater variability and higher harmonic distortion under both light and heavy load conditions. The analysis of the solar photovoltaic (PV) system provides critical insights into the performance differences between the two inverter types. Notably, the results related to tilt angle are not merely supplementary; they serve as indicators of varying irradiance conditions, enabling a more comprehensive evaluation of inverter performance concerning fluctuations in input power levels. Both PSW and MSW inverters achieved an efficiency rating of 85%, ensuring stable and smooth outputs. However, with regard to long-term reliability, the PSW inverter significantly surpasses its counterpart, rendering it a more appropriate choice for permanent solar PV installations. As the results, the PSW inverter is particularly suited for sensitive loads that demand high power quality, while the MSW inverter remains viable for less demanding applications when the cost is considered.
Co-Authors Abubakar, Said Alfayumi, Rizal Jamaluddin Jamaluddin Nelly Safitri Saifuddin Muhammad Jalil Sukamto, Ika Sumiyarsi Syahputra, Rudi Yaman Yaman, Yaman