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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Teknik ITS IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science TELKOMNIKA (Telecommunication Computing Electronics and Control) Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control SENTIA 2015 JAVA Journal of Electrical and Electronics Engineering Jurnal Intake : Jurnal Penelitian Ilmu Teknik dan Terapan Indonesian Journal of Electrical Engineering and Computer Science JAREE (Journal on Advanced Research in Electrical Engineering) SinarFe7 Sewagati Jurnal Rekayasa elektrika Jurnal Cakrawala Maritim Jurnal Cakrawala Maritim SNTE
Mochamad Ashari
Electrical Engineering, FTI, Institut Teknologi Sepuluh Nopember, Surabaya, INDONESIA
Arts Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Other

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Journal : IPTEK The Journal for Technology and Science

 1 
Advanced DVR with Zero-Sequence Voltage Component and Voltage Harmonic Elimination for Three-Phase Three-Wire Distribution Systems Margo P; Mauridhi Heri Purnomo; Mochamad Ashari; Zaenal P; Takashi Hiyama
IPTEK The Journal for Technology and Science Vol 20, No 4 (2009)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v20i4.21

Abstract

Dynamic Voltage Restorer (DVR) is a power electronics device to protect sensitive load when voltage sag occurs. Commonly, sensitive loads are electronic-based devices which generate harmonics. The magnitude and phase of compensated voltage in DVR depend on grounding system and type of fault. If the system is floating, the zero sequence components do not appear on the load side. Meanwhile, in a neutral grounded system, voltage sag is extremely affected by zero sequence components. A blocking transformer is commonly installed in series with DVR to reduce the effect of zero sequence components. This paper proposes a new DVR control scheme that is capable of eliminating the blocking transformer and reducing harmonic distortion. The system uses fuzzy polar controller to replace the conventional PI or FL controller that is commonly used. By taking into account the zero sequence components in the controller design, the effects of zero sequence components can be compensated. Simulated results show the effectiveness of the proposed DVR controller
Converter Ac-to-Ac With Additional Free- Wheeling Switches for Improving Power Factor and Reducing Harmonic Distortion Mochamad Ashari1
IPTEK The Journal for Technology and Science Vol 19, No 2 (2008)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v19i2.153

Abstract

This paper presents development of single phase AC-to-AC converter with additional free-wheeling switches for improving the power factor and reducing harmonic distortion. The proposed system uses 2 switching types: the main switch and additional switch. The main switch is for controling the amplitude of the output voltage, while the additional switch is for releasing energy from inductive loads (free-wheeling switch). The main swicth is controlled by pulse width modulation (PWM), and the additional switch is modulated using the line frequency, 50 Hz. An AC-to-AC converter was simulated and built for laboratory test purposes. A conventional system, using thyristor and called Phase Control, was simulated for the system comparison. Results from simulation and laboratory tests show that the proposed system works properly. Using the same loads, the conventional system presents power factor as 0,34–0,71 and the voltage THD as 62.1%. The proposed system provides an improved power factor at nearly unity, and presents the total harmonic distortion of the voltage as 2.45%.
Performance Fuzzy Logic Control to Minimize Output Voltage Ripple and Balanced Current Distribution of DC-DC Converters in Parallel Non-Identical Bambang Suprianto; Mochamad Ashari; Mauridhi Hery Purnomo
IPTEK The Journal for Technology and Science Vol 21, No 1 (2010)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v21i1.28

Abstract

Analysis of DC-DC converters are arranged in parallel with the inductor parameters which are different from what discussed in this paper. Buck DC-DC converter using non-identical model, that is different in the value of inductance which is L1 ≠ L2 ≠ L3. Research techniques are taken from the difference of current flows of each converter i.e. I1-I2 and I1- I3 and the reference current is I1. This current difference results are used as input controller. PID and Fuzzy Inference System with 5 gbell membership function are used as a controller. The results of this study indicate a significant system performance. Output voltage ripple is 10 mV with the total output current is 63.7 Ampere. Each DC-DC converter provides a current of contribution to the load 21.28 Ampere. The difference of the current distribution of each converter module range is 1mA - 4mA RMS (Root Mean Square) using PID control, while using Fuzzy Logic Control for differences in the distribution of current is 0.1 mA RMS and the output voltage is 48 volt. Fuzzy Logic Control performance has shown an improvement of control systems to reduce the output voltage ripple and the ability to share load current equally into each DC-DC converter.
Co-Authors A. Musthofa. Abigail Engrasia Maharani Abil Huda Achmad Abdul Ghoni Adhika Prajna Nandiwardhana Adi Soeprijanto Ainur Rachmad Hidayat Akbar Faiz Akhmad Zaky Fanani Alamsyah Achmad Andi Taufiq Andri Pradipta Antonius Rajagukguk Bambang Sujanarko Bambang Suprianto . Bayu Prasetyo Cahyaningati, Desi D Fahmi Dedet Candra Riawan Dedet Chandra Riawan Denny Dermawan Dewi Kurniasih Dimas Anton A Dwiana Hendrawati Faanzir Faanzir Farid Dwi Murdianto Feby Agung Pamuji Glanny M.Christiaan Mangindaan Gusti Rinaldi Zulkarnain Gusti Rinaldi Zulkarnain Hari Agus Sujono Harumwidiah, Anisa Heri Suryoatmojo Heri Suryoatmojo Hermansyah Hermansyah Hery Suryoatmojo Imam Robandi Imron Rosyadi K B Adam Maharani, Aditya Mahfudzi, Imam Margo P Marselin Jamlaay Mauridhi Heri Purnomo Mauridhi Hery Purnomo Mochamad Reganata Mochamad Wahyu Jasa Putra Mochammad Choirul Rizal Mochammad Rifai Moh. Jauhari Mohammad Ridwan Muhammad Zaky Zaim Muhtadi Muldi Yuhendri Nurcahya, Kevinda Anugrah Nurvita Arumsari Ontoseno Penangsang Priyo Edy Wibowo Ramadoni Syahputra Resa Hidayat Pramasdeka Rezi Delfianti Riny Sulistyowati Ronny Mardiyanto, Ronny Rony Seto Wibowo S Hidayat Sjamsjul Anam Soedibyo Soedibyo Soedibyo Soedibyo Soedibyo Soedibyo Soedibyo Suwito Suyanto Suyanto Takashi Hiyama Teguh Yuwono Umar Vita Lystianingrum Yanwar M.S Yanwar M.S Zaenal P Zamratul Fuadi