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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 : telkomnika telecommunication computing electronics and control

 1 
Maximum Output Power Tracking of Wind Turbine Using Intelligent Control Muldi Yuhendri; Mochamad Ashari; Mauridhi Hery Purnomo
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 2: August 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i2.690

Abstract

 The Output power of wind turbine is determined by wind speed. The Output power can be adjusted by controlling the generator speed and pitch angle of wind turbine. When the wind speed below the wind turbine rated, the output power of generator can be maximized by controlling the generator speed at point of maximum power coefficient. When the wind speed above the wind turbine rated, output power of wind turbine will exceed the power generators rated. In this condition, the output power of wind turbine needs to be regulated to conform to the generator power rate. Output power of wind turbine can be regulated by adjusting the pitch angle of wind turbine. In this paper is developed the control strategies based intelligent control for controlling the generator speed and pitch angle of wind turbine, so the  maximum output power tracking (MOPT) of wind turbine can be obtained at any wind speed variations. Generator speed is controlled using PI Fuzzy Logic Controller (PI-FLC) based Direct Field Oriented Control (DFOC). Pitch angle of wind turbine is controlled using Elman Recurrent Neural Network (RENN). The simulation results with Matlab Simulink shows that the both controller was successfully regulates the output power when the wind speed above the wind turbine rated and the output power can be maximum when the wind speed below the wind turbine rated. 
Optimal Design of Fuel-cell, Wind and Micro-hydro Hybrid System using Genetic Algorithm Soedibyo Soedibyo; Heri Suryoatmojo; Imam Robandi; Mochamad Ashari
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 4: December 2012
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v10i4.858

Abstract

The target of stand-alone hybrid power generation system was to supply the load demand with high reliability and economically as possible. An intelligent optimization technique using Genetic Algorithm is required to design the system.This study utilized Genetic Algorithm method to determine the optimal capacities of hydrogen, wind turbines and micro-hydro unit according to the minimum cost objective functions.The minimum cost valutes to these two factors. In this study, the cost objective function included the annual capital cost, annual operation maintenance cost, annual replacement cost and annual customer damage cost. The proposed method will be used to optimize the hybrid power generation system located in Leuwijawa village in Central Java of Indonesia. Simulation results showed that the optimum configuration can be achieved using 19.85 ton of hydrogen tanks, 21x100 kW wind turbines and 610 kW of micro-hydro unit respectively
IMPROVED VOLTAGE OF CASCADED INVERTERS USING SINE QUANTIZATION PROGRESSION Bambang Sujanarko; Mochamad Ashari; Mauridhi Hery Purnomo
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 8, No 2: August 2010
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v8i2.613

Abstract

The previous methods of cascaded multilevel inverter (CMLI) can improve power quality but the methods have low voltage output if the DC voltages limited by the voltage rating of power semiconductor. To improve the amplitude of CMLI output voltage, this paper proposes a new DC voltage progression. The progression based on sine quantization method (SQM), which determines a sequence of DC voltages from discrete amplitudes of sine wave function. The method also collaborates with step equal residual area method (SERAM) to minimized total harmonics distortions (THD). A single-phase CMLI that consist four H-Bridges simulated and implemented to verify the methods. Amplitude output voltage and THD results of simulations and experiments indicate that the sine quantization progression produce the highest output voltage than other DC voltage progressions, with power quality or THD in the accepted region. The amplitude of output voltage have linier function with amplitude equal 0.6665 times of H-Bridges numbers and have exponential function of THD with value below 5%.
KOMBINASI FEED BACK DAN FEED FORWARD KONTROLLER PI SEBAGAI KENDALI DYNAMIC VOLTAGE RESTORER (DVR) UNTUK MEMULIHKAN VOLTAGE SAG DAN INTERRUPTION Dimas Anton A; Imron Rosyadi; Mochamad Ashari; Heri Suryoatmojo
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 7, No 2: August 2009
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v7i2.581

Abstract

Dynamic voltage restorer (DVR) is one of equipments to protect sensitive load from voltage drop. DVR is installed series with line feeder by serial transformer which injecting voltage when under voltage occurs. This research is investigate the capability of DVR, which controlled by combination of feed back and feed forward PI, to handle voltage sag and interruption. DVR controls have been designed and implemented in DVR prototype. As a result, in simulation, DVR can maintain voltage in range 90% - 105% nominal voltage. Voltage at load side can be restored to 1 pu and 0.79 pu when voltage sag and interruption respectively. Furthermore, DVR prototype can restore 0.95 pu when voltage sag and 0.54 pu when interruption.
Reconfiguration of Distribution Network with Distributed Energy Resources Integration Using PSO Algorithm Ramadoni Syahputra; Imam Robandi; Mochamad Ashari
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 13, No 3: September 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v13i3.1790

Abstract

This paper presents optimal reconfiguration of radial distribution network with integration of distributed energy resources (DER) using improved particle swarm optimization (PSO) algorithm. The benefits of DER integration in distribution system are reducing power losses, improving voltage profiles and load factors, eliminating system upgrades, and reducing environmental impacts. However, the presence of DER could also cause technical problems in voltage quality and system protection. Reconfiguration of distribution network is aimed to minimize power loss and to improve voltage quality in order to enhance the distribution system performance. In this study, reconfiguration method is based on an improved PSO. The method has been tested in a 60-bus Bantul distribution network of Yogyakarta Special Region province, Indonesia. The simulation results show the importance of reconfiguring the network for enhancing the distribution system performance in the presence of DER.
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