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All Journal International Journal of Applied Power Engineering (IJAPE) Bulletin of Electrical Engineering and Informatics Jurnal EECCIS
Wijono Wijono
University of Brawijaya
Electrical & Electronics Engineering Engineering

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Photovoltaic Array Modeling under Uniform Irradiation and Partial Shading Condition Lunde Ardhenta; Wijono Wijono
International Journal of Applied Power Engineering (IJAPE) Vol 6, No 3: December 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (636.751 KB) | DOI: 10.11591/ijape.v6.i3.pp142-149

Abstract

Wind energy and solar energy are the prime energy sources which are being utilized for renewal energy. The performance of a photovoltaic (PV) array for solar energy is affected by temperature, irradiation, shading, and array configuration. Often, the PV arrays are shadowed, completely or partially, by the passing clouds, neighboring buildings and towers, trees, and utility and telephone poles. Under partially shaded conditions, the PV characteristics are more complex with multiple peaks, hence, it is very important to understand and predict the MPP under PSC in order to extract the maximum possible power. This paper presents the development of PV array simulator for studying the I–V and P–V characteristics of a PV array under a partial shading condition. It can also be used for developing and evaluating new maximum power point tracking techniques, for PV array with partially shaded conditions. It is observed that, for a given number of PV modules, the array configuration significantly affects the maximum available power under partially shaded conditions. This is another aspect to which the developed tool can be applied. The model has been experimentally validated and the usefulness of this research is highlighted with the help of several illustrations.
Design of 4-stage Marx generator using gas discharge tube Wijono Wijono; Zainul Abidin; Waru Djuriatno; Eka Maulana; Nola Ribath
Bulletin of Electrical Engineering and Informatics Vol 10, No 1: February 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i1.1949

Abstract

In this paper, a Marx generator voltage multiplier as an impulse generator made of multi-stage resistors and capacitors to generate a high voltage is proposed. In order to generate a high voltage pulse, a number of capacitors are connected in parallel to charge up during on time and then in series to generate higher voltage during off period. In this research, a 6kV Marx generator voltage multiplier is designed using gas discharge tube (GDT) as an electronic switch to breakdown voltage. The Marx generator circuit is designed to charge the storage capacitor for high impulse voltage and current generator applications. According to IEC 61000-4-5 class 4 standards, the storage capacitor must be charged up to 4 kV. The results show that the proposed Marx generator can produce voltages up to 6.8 kV. However, the storage capacitor could be charged up to 1 kV, instead of 4 kV in the standard. That is because the output impulse voltage has narrow time period.
Rancang Bangun Generator Plasma dengan Media Gas Argon David Suban Koten; Wijono Wijono; Rini Nur Hasanah
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 11 No. 1 (2017)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1092.648 KB) | DOI: 10.21776/jeeccis.v11i1.427

Abstract

Suatu substansi yang elektron-elektronnya keluar dari orbit tiap atom disebut dengan plasma. Plasma merupakan gas yang terion, dan dapat dibuat dengan cara memanaskan gas atau dengan cara memaparkan medan elektromagnetik yang cukup kuat menggunakan laser atau pembangkit gelombang mikro. Masalah utama dalam pembuatan reaktor plasma adalah bagaimana merancang sistem reaktor plasma yang mempunyai tekanan yang rendah (vacuum) dan menghasilkan debit plasma yang tinggi. CCP (capacitively coupled plasma) merupakan metode yang umum digunakan dalam pembangkitan plasma pada dunia industri. Metode CCP adalah metode yang menggunakan dua elektroda logam yang terpisah dalam jarak yang cukup dekat dan ditempatkan di dalam sebuah reaktor. Tekanan gas dalam reaktor tersebut bisa sama atau lebih rendah dari tekanan atmosfer. Dalam penelitian ini diulas bagaimana merancang generator plasma tegangan tinggi, sehingga dapat memasok tegangan arus searah (DC) untuk membangkitkan plasma di dalam ruangan reaktor yang berisi gas argon tekanan rendah. Selain itu pada penelitian ini juga dilakukan analisa tegangan breakdown sampai ditemukan rajahan hubungan antara tegangan breakdown dengan tekanan gas dan jarak antar elektroda. Diharapkan rajahan tersebut bisa disesuaikan dengan kurva sesuai dengan Hukum Paschen dan mendapatkan hasil yang mendekati kurva ideal.
Co-Authors David Suban Koten Eka Maulana Lunde Ardhenta Nola Ribath Rini Nur Hasanah Waru Djuriatno Zainul Abidin