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All Journal International Journal of Electrical and Computer Engineering ELKHA : Jurnal Teknik Elektro Mechatronics, Electrical Power, and Vehicular Technology Jurnal INKOM Jurnal Elektronika dan Telekomunikasi Prosiding Seminar Nasional Teknik Elektro, Sistem Informasi, dan Teknik Informatika (SNESTIK)
Agus Risdiyanto
Research Centre for Electrical Power and Mechatronics, Indonesian Institute of Sciences, Kompleks LIPI Gd. 20, Lt 2, Jl. Sangkuriang, Bandung
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

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 1 
Effect of Contact Pressure on the Resistance Contact Value and Temperature Changes in Copper Busbar Connection Risdiyanto, Agus; Rachman, Noviadi Arief; Arifin, Maulana
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 3, No 2 (2012)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (587.178 KB) | DOI: 10.14203/j.mev.2012.v3.73-80

Abstract

This paper discussed the influence of tightness or contacts pressure on copper busbar joints to determine changes in the value of the initial contact resistance and the maximum temperature at the joint due to high current load. The test sample was copper busbar 3 x 30 mm with configuration of bolted overlapping joint. Increasing contact pressure at the joint was measured to find out its effect on the value of contact resistance. The applied pressure was 6 to 36 MPa. Procedure of contact resistance measurement refer to the ASTM B539 standard using four-wire method. The sample subsequently loaded with the current of 350 A for 60 minutes and the maximum temperature at the joint was measured. The result showed that increasing contact pressure at the busbar joint will reduce the contact resistance and maximum temperature. The increase of contact pressure from 6 to 30 MPa causes decreasing contact resistance from 16 μΩ to 11 μΩ. Further increasing of contact pressure more than 30 MPa did not affect the contact resistance significantly. The lowest temperatur of busbar joint of 54°C was reached at a contact pressure of 36 Mpa.
Modeling of Electric Field Around 100 MVA 150/20 kV Power Transformator using Charge Simulation Method Rachman, Noviadi Arief; Risdiyanto, Agus; Ramdan, Ade
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 1 (2013)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.mev.2013.v4.33-40

Abstract

Charge Simulation Method is one of the field theory that can be used as an approach to calculate the electromagnetic distribution on the electrical conductor. This paper discussed electric field modeling around power transformator by using Matlab to find the safety distance. The safe distance threshold of the electric field to human health refers to WHO and SNI was 5 kV/m. The specification of the power transformator was three phases, 150/20 kV, and 100 MVA. The basic concept is to change the distribution charge on the conductor or dielectric polarization charge with a set of discrete fictitious charge. The value of discrete fictitious charge was equivalent to the potential value of the conductor, and became a reference to calculate the electric field around the surface contour of the selected power transformator. The measurement distance was 5 meter on each side of the transformator surface. The results showed that the magnitude of the electric field at the front side was 5541 V/m, exceeding the safety limits.
Analisa Unjuk Kerja Grid Tied Inverter Terhadap Pengaruh Radiasi Matahari dan Suhu PV pada PLTS On-Grid Nahela, Safri; Faridyan, Ivan Fauzi; Rachman, Noviadi Arief; Risdiyanto, Agus; Susanto, Bambang
ELKHA : Jurnal Teknik Elektro Vol.11 No.2, October 2019
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2969.101 KB) | DOI: 10.26418/elkha.v11i2.31452

Abstract

Abstract – Solar radiation and temperature in photovoltaic (PV) can affect the output voltage and current of PV so that it also relates to the performance of the Grid Tied Inverter (GTI) on the on-grid PV system. This paper discusses the performance of the GTI based on output power on solar radiation and PV temperature. The method used in this testing was measuring simultaneously against the current and voltage parameters on PV, the current and voltage of the GTI, and the radiation and temperature of PV. Measurement with a data logger was also carried out on the above parameters in the morning and evening to find out at least the PV output voltage and current when the GTI starts or stops sending the power. The measurement results obtained that the GTI output power is affected by solar radiation and PV temperature. On the same radiation when the PV temperature gets higher, the PV voltage will drop, but the PV current and GTI current will increase. In addition, if with the same radiation and temperature but the AC source voltage was greater, the output power of GTI would also increase. The power produced by the GTI was lower than PV power due to GTI losses. The efficiency of the GTI decreases not only because of the increase in temperature above 35 oC but also due to the decreasing grid voltage. GTI starts sending power when the PV current was more than 2 A at 06.23 AM. GTI stops operating when the PV current was less than 1.74 A at 05.53 PM.
Perancangan Sistem Indikator Digital pada Kendaraan Listrik Risdiyanto, Agus; Lusijarto, Teguh Tri; Susanto, Bambang
INKOM Journal Vol 1, No 2 (2007)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (248.988 KB) | DOI: 10.14203/j.inkom.17

Abstract

Perancangan sistem indikator digital dilakukan untuk mendukung litbang kendaraan listrik sebagai transportasi masa depan yang ramah lingkungan dan hemat energi. Sistem ini dirancang dengan berbasis mikro prosesor untuk memonitor setiap perubahan karakteristik komponen-komponen utama yang ada pada kendaraan listrik. Alat ini terpasang pada bagian panel depan mobil (dash board). Alat ini mempunyai dimensi yang lebih kecil dan memiliki unjuk kerja yang tinggi. Sistem indikator digital ini menghasilkan sistem yang handal, akurat dan mempunyai tingkat keamanan yang lebih baik.Kata kunci: sistem indikator digital, kendaraan listrik, mikroprosessor
Particle Swarm Optimization (PSO) based Photovoltaic MPPT Algorithm under the Partial Shading Condition Mukti, Ersalina Werda; Risdiyanto, Agus; Kristi, Ant. Ardath; Darussalam, Rudi
Jurnal Elektronika dan Telekomunikasi Vol 23, No 2 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.552

Abstract

Performance of solar photovoltaic (PV) system degrades considerably when the surface of the PV array is covered with shadows indicated by the reduction in the generated power. Partial shading condition causes the PV array to produce multiple peaks in PV’s characteristic curve causing the non-optimal power generation of the conventional maximum power point (MPPT) algorithm. Therefore, we proposed an optimization of PV system through the design of particle swarm optimization (PSO) algorithm in the MPPT in order to enhance the power extraction during shaded conditions. The evaluation of the performance of MPPT were carried out by comparing tracking time, tracking error and efficiency obtained by the PSO along with the two most used algorithms namely perturb and observe (P&O) and incremental conductance (IC). A partial shading generator function was designed to generate shading patterns randomly. The PV system consists of ten PV modules integrated with DC dummy load through DC-DC boost converter was simulated using MATLAB/SIMULINK. Simulation results show that the proposed PSO could obtain the global maximum power point (GMPP) while tracking performance of the P&O and IC MPPT both were stuck on the local maxima. Moreover, the optimization of PSO MPPT gave a promising result that the efficiency of the PV system was improved by around 4.66% on the dynamic shading conditions, while the MPPT’s tracking time is slowed down by 0.0025 s and 0.0105 s when its compared to the P&O and IC MPPT respectively.
Energy analysis of active photovoltaic cooling system using water flow Kristi, Ant. Ardath; Susanto, Erwin; Risdiyanto, Agus; Junaedi, Agus; Darussalam, Rudi; Rachman, Noviadi Arief; Fudholi, Ahmad
International Journal of Electrical and Computer Engineering (IJECE) Vol 15, No 1: February 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v15i1.pp1-14

Abstract

An active water-cooling system is one of several technologies that has been proven to be able to reduce heat losses and increase electrical energy in photovoltaic (PV) module. This research discusses a comparative experimental study of three pump activation controls in cooling of PV module with the aim of evaluating specifically the PV output power, net energy gain, water flow rate, and module temperature reduction. The three pump activation controls being compared are continuously active during the test, active based on setpoint temperature, and active by controlling the pump voltage using pulse width modulation (PWM) control in adjusting water flow rate smoothly. The results show that controlling the pump voltage using PWM in the PV cooling process produces energy of 437.95 Wh, slightly lower than the others and the average module cooling temperature is 35.24 °C, higher of 1-3 °C than the others. Nevertheless, PWM control of cooling pump has resulted the percentage of net energy gain of 9.94%, greater than other controls, and with an average flow rate of 2.17 L/min, more efficient than the others. Thus, this control is quite effective as it can produce higher net PV energy yield and lower water consumption.
Penerapan Kendali Logika Fuzzy pada Proses Pendinginan Panel Surya Kristi, Ant. Ardath; Risdiyanto, Agus; Susanto, Erwin
Prosiding Seminar Nasional Teknik Elektro, Sistem Informasi, dan Teknik Informatika (SNESTIK) 2025: SNESTIK V
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/p.snestik.2025.7366

Abstract

Salah satu faktor yang dapat mempengaruhi kinerja panel surya selain radiasi matahari, dan juga kondisi lingkungan sekitar panel adalah suhu. Panel surya akan menerima panas yang berasal dari radiasi matahari, sehingga menyebabkan suhu pada panel meningkat melebihi nilai suhu optimal yang disarankan dan kondisi ini menyebabkan kinerja dan juga efisiensi dari sel surya turun drastis. Setiap kenaikan suhu panel surya sebesar 1 ℃ dari 25℃ akan mengakibatkan pengurangan daya keluaran yang dihasilkan sebesar kisaran 0,4-0,5 %. Sistem pendingin air aktif merupakan salah satu dari beberapa teknologi yang telah terbukti mampu mengurangi kehilangan panas dan meningkatkan energi listrik pada modul fotovoltaik (PV). Penerapan kendali logika fuzzy pada sistem pendingin panel surya berbasis air menghasilkan perolehan energi bersih yang lebih unggul sebesar 43,90Wh atau meningkat sebesar 13,55% jika dibandingkan proses pendinginan tanpa memasukan kedali logika fuzzy dimana perolehan energi bersihnya berkurang sebesar 9,72%. Nilai efisiensi yang dihasilkan dari proses pendinginan dengan penerapan kendali logika fuzzy sebesar 20,33% lebih besar jika dibandingkan dengan proses pendinginan tanpa logika fuzzy yaitu 19,56%.
Co-Authors A.A. Ketut Agung Cahyawan W Ade Ramdan Ahmad Fudholi Darussalam, Rudi Erwin Susanto Faridyan, Ivan Fauzi Junaedi, Agus Kristi, Ant. Ardath Lusijarto, Teguh Tri Maulana Arifin Mukti, Ersalina Werda Nahela, Safri Noviadi Arief Rachman