Articles
<![CDATA[MPPT Based on Fuzzy Logic Controller (FLC) for Photovoltaic (PV) System in Solar Car ]]>
<![CDATA[Aji, Seno]]>;
<![CDATA[Ajiatmo, Dwi]]>;
<![CDATA[Robandi, Imam]]>;
<![CDATA[Suryoatmojo, Heri]]>
<![CDATA[ Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 2 (2013) ]]>
Publisher : <![CDATA[Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences ]]>
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DOI: 10.14203/j.mev.2013.v4.127-134
<![CDATA[This paper presents a control called Maximum Power Point Tracking (MPPT) for photovoltaic (PV) system in a solar car. The main purpose of this system is to extracts PV power maximally while keeping small losses using a simple design of converter. Working principle of MPPT based fuzzy logic controller (MPPT-FLC) is to get desirable values of reference current and voltage. MPPT-FLC compares them with the values of the PV's actual current and voltage to control duty cycle value. Then the duty cycle value is used to adjust the angle of ignition switch (MOSFET gate) on the Boost converter. The proposed method was shown through simulation performed using PSIM and MATLAB software. Simulation results show that the system is able to improve the PV power extraction efficiency significantly by approximately 98% of PV’s power.]]>
<![CDATA[Studi Kasus Skema Proteksi Adaptif Overcurrent Pada Beban Auxilary PLTU Perak Memperhatikan Units Cogeneration ]]>
<![CDATA[Firmansyah, Mochamad Anggi]]>;
<![CDATA[Pujiantara, Margo]]>;
<![CDATA[Suryoatmojo, Heri]]>
<![CDATA[ Jurnal Teknik ITS Vol 1, No 1 (2012) ]]>
Publisher : <![CDATA[Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS ]]>
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DOI: 10.12962/j23373539.v1i1.71
<![CDATA[PLTU Perak dalam menyuplai daya listrik menuju sistem jaringan juga membutuhkan suplai daya listrik untuk beban auxiliary-nya. Suplai daya tersebut pada setiap unitnya disuplai oleh dua sumber yaitu melalui pemakaian sendiri (generator utama) dan sistem starting (incoming PLN) yang sistem suplai tersebut dilakukan berdasarkan kondisi tetentu dalam suatu cogeneration. Dengan adanya sistem cogeneration ini, sistem proteksi arus lebih beban auxiliary harus pula mengakomodasi kondisi tersebut akibat nilai arus hubung singkat yang berbeda untuk setiap skema cogeneration. Untuk itu rele digital yang dimiliki oleh unit ini pada beban auxiliary harus disetting secara benar, efisien serta adaptif agar dapat mengakomodasi permasalahan tersebut.]]>
<![CDATA[Maximum Power Point Tracking (MPPT) Pada Variabel Speed Wind Turbine (VSWT) Dengan Permanent Magnet Synchronous Generator (PMSG) menggunakan Switch Mode Rectifier (SMR) ]]>
<![CDATA[saputra, Armaditya Tri Martha]]>;
<![CDATA[Suryoatmojo, Heri]]>;
<![CDATA[Yuwono, Teguh]]>
<![CDATA[ Jurnal Teknik ITS Vol 1, No 1 (2012) ]]>
Publisher : <![CDATA[Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS ]]>
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DOI: 10.12962/j23373539.v1i1.80
<![CDATA[Energi angin merupakan salah satu energi alam yang terbarukan dan memiliki potensi yang cukup besar sebagai pembangkit listrik. Dalam sistem pembangkit yang berdiri sendiri perlu diperhatikan pengaturan yang tepat agar tidak merusak komponennya. Oleh karena itu pada tugas akhir ini akan dibahas tentang strategi kontrol baru untuk pengoperasian Variable Speed Wind Turbine (VSWT) dengan Permanent Magnet Synchronous Generator (PMSG) yang tereksitasi sendiri menggunakan Switch Mode Rectifier (SMR). Strategi kontrol ini dipasang pada konverter sisi generator dengan tujuan untuk memaksimalkan ekstraksi daya yang ada. Bagian utama yang diatur disini adalah tegangan output dengan mengontrol kecepatan rotor untuk mengatasi perubahan angin yang bervariasi. Sehingga dalam tugas akhir ini nantinya akan ditunjukkan bahwa dengan mengontrol VSWT-PMSG dapat mengekstraksi daya maksimum serta mampu mengatur tegangan output dalam berbagai kondisi angin mulai dari 6m/s sampai 12 m/s dan perubahan beban mulai dari 20 ohm sampai 300 ohm.]]>
<![CDATA[Design and Implementation of Z-Source Inverter by Simple Boost Control Technique for Laboratory Scale Micro-Hydro Power Plant Application ]]>
<![CDATA[Ariefianto, Rizki Mendung]]>;
<![CDATA[Aprilianto, Rizky Ajie]]>;
<![CDATA[Suryoatmojo, Heri]]>;
<![CDATA[Suwito, Suwito]]>
<![CDATA[ Jurnal Teknik Elektro Vol 13, No 2 (2021): Jurnal Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro, Fakultas Teknik, Universitas Negeri Semarang ]]>
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DOI: 10.15294/jte.v13i2.31884
<![CDATA[In a power plant such as micro-hydropower (MHP), an induction generator (IG) is usually employed to produce electrical power. Therefore, an inverter is needed to deliver it with high efficiency. Z-source inverter (ZSI) has been introduced as a topology with many advantages over conventional inverters. This research aims to investigate the performance of ZSI based simple boost control (SBC) in laboratory-scale MHP systems using a rewinding induction generator. This research has been conducted both from simulations and experiments. Based on the result, the waveform characteristic and value of ZSI are close to the desired design. A shoot-through duty ratio of 17% can reach 60 Vrms output voltage, and this condition has a conversion ratio of about 2.05 times. Also, SBC can significantly reduce the Total Harmonic Distortion (THD). ZSI efficiency has a value of 84.78% at 50% of rating load 100 W and an average value of 80%. Compared to the previous study, the proposed design has more economical with the same component for the higher rating power. Moreover, it has a smoother and entire output waveform of the voltage.]]>
<![CDATA[Optimal Design of Fuel-cell, Wind and Micro-hydro Hybrid System using Genetic Algorithm ]]>
<![CDATA[Soedibyo Soedibyo]]>;
<![CDATA[Heri Suryoatmojo]]>;
<![CDATA[Imam Robandi]]>;
<![CDATA[Mochamad Ashari]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 4: December 2012 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v10i4.858
<![CDATA[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]]>
<![CDATA[KOMBINASI FEED BACK DAN FEED FORWARD KONTROLLER PI SEBAGAI KENDALI DYNAMIC VOLTAGE RESTORER (DVR) UNTUK MEMULIHKAN VOLTAGE SAG DAN INTERRUPTION ]]>
<![CDATA[Dimas Anton A]]>;
<![CDATA[Imron Rosyadi]]>;
<![CDATA[Mochamad Ashari]]>;
<![CDATA[Heri Suryoatmojo]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 7, No 2: August 2009 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v7i2.581
<![CDATA[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.]]>
<![CDATA[MPPT Based on Fuzzy Logic Controller (FLC) for Photovoltaic (PV) System in Solar Car ]]>
<![CDATA[Seno Aji]]>;
<![CDATA[Dwi Ajiatmo]]>;
<![CDATA[Imam Robandi]]>;
<![CDATA[Heri Suryoatmojo]]>
<![CDATA[ Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 2 (2013) ]]>
Publisher : <![CDATA[National Research and Innovation Agency ]]>
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DOI: 10.14203/j.mev.2013.v4.127-134
<![CDATA[This paper presents a control called Maximum Power Point Tracking (MPPT) for photovoltaic (PV) system in a solar car. The main purpose of this system is to extracts PV power maximally while keeping small losses using a simple design of converter. Working principle of MPPT based fuzzy logic controller (MPPT-FLC) is to get desirable values of reference current and voltage. MPPT-FLC compares them with the values of the PV's actual current and voltage to control duty cycle value. Then the duty cycle value is used to adjust the angle of ignition switch (MOSFET gate) on the Boost converter. The proposed method was shown through simulation performed using PSIM and MATLAB software. Simulation results show that the system is able to improve the PV power extraction efficiency significantly by approximately 98% of PV’s power.]]>
<![CDATA[DESIGN OF SPEED CONTROL BRUHLESS DC MOTOR BASED POWER FACTOR CORRECTION (PFC) USING SINGLE ENDED PRIMARY INDUCTANCE CONVERTER (SEPIC) ]]>
<![CDATA[Nanda Redha Arsya]]>;
<![CDATA[Heri Suryoatmojo]]>;
<![CDATA[Sjamsjul Anam]]>
<![CDATA[ Jurnal Teknik ITS Vol 5, No 2 (2016) ]]>
Publisher : <![CDATA[Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS ]]>
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DOI: 10.12962/j23373539.v5i2.16028
<![CDATA[Brushless DC motors have been applied extensively in household and industrial scale because of the advantages such as high efficiency and mechanical losses are low because it does not use the brush like a DC motor. Application of the brushless DC motors using 220 rms AC source is rectified to minimize battery usage. However, the use of brushless DC motors and rectifying circuit can cause poor power factor and harmonic value. Power factor value reaches 0,73 while the current THD at 74%. These values are outside the permitted tolerance limits. This study aims to improve the power factor and THD value of current caused by the operation of brushless DC motors using a SEPIC converter. Moreover, the purpose of this study is that the motor is able to operate at different levels of speed and load vary. Based on the results of the simulation from the design has been made, the motor can respond to variations in the speed reference given to well. The control circuit is also able to make the motor maintain its speed with changes in the load every time. Power factor observed in resources has increased to 0.999 at various speeds. In addition, the current THD has an average value of 2% at various speeds. Both of these parameters are within the tolerances allowed by the standard. ]]>
<![CDATA[PERANCANGAN DAN IMPLEMENTASI MULTI-INPUT KONVERTER BUCK UNTUK PENGISIAN BATERAI MENGGUNAKAN PANEL SURYA DAN TURBIN ANGIN ]]>
<![CDATA[Zainul - Arifin]]>;
<![CDATA[Dedet Candra Riawan]]>;
<![CDATA[Heri - Suryoatmojo]]>
<![CDATA[ Jurnal Teknik ITS Vol 5, No 2 (2016) ]]>
Publisher : <![CDATA[Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS ]]>
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DOI: 10.12962/j23373539.v5i2.16031
<![CDATA[Baterai adalah sebuah peralatan listrik yang berfungsi untuk menyimpan energi pada peralatan elektrik, elektronik, maupun peralatan otomotif. Perkembangan teknologi pembangkitan tenaga listrik dengan memanfaatkan sumber energi terbarukan saat ini berkembang pesat sehingga diharapkan mampu menjadi sumber listrik alternatif. Untuk membuat sistem yang diharapkan dilakukan dengan cara menggabungkan sumber-sumber energi listrik yang ramah lingkungan dan melimpah seperti sel surya dan turbin angin.Tujuan dari penggunaan teknologi Konverter multi-input (MIC) adalah untuk menggabungkan keluaran tegangan panel surya dan turbin angin agar kedua sumber dapat bekerja secara mandiri atau pun bersama-sama. Konverter multi-input adalah konverter yang mempunyai input lebih dari satu. Pada Tugas Akhir ini daya yang dihasilkan dari MIC akan digunakan untuk pengisian baterai. Pengoperasian MIC dilakukan dengan mengatur duty cycle yang berupa modulator PWM yang dipasang pada sakelar masing-masing sumber. Sedangkan tegangan keluaran dari MIC dijaga konstan untuk pengisian baterai dengan mode constant voltage. Dalam implementasi dapat dibuktikan bahwa dengan menggunakan dua sumber input tegangan dan beban resistor, tegangan keluaran konverter tetap terjaga konstan Kata Kunci: Panel surya, Baterai, konverter DC-DC, Konverter multi-input]]>
<![CDATA[Desain dan Implementasi Konverter DC-DC Rasio Tinggi Berbasis Integrated Quadratic Boost Zeta untuk Aplikasi Photovoltaic ]]>
<![CDATA[A.Hafizh Rifa'i]]>;
<![CDATA[Dedet Candra Riawan]]>;
<![CDATA[Heri Suryoatmojo]]>
<![CDATA[ Jurnal Teknik ITS Vol 5, No 2 (2016) ]]>
Publisher : <![CDATA[Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS ]]>
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DOI: 10.12962/j23373539.v5i2.16051
<![CDATA[Abstrak— Photovoltaic pada umumnya digunakan untuk mengubah energy matahari menjadi energy listrik. Jika jumlah modul photovoltaic terbatas maka tegangan keluaran yang dihasilkan akan kecil. Untuk menghubungkan ke inverter pada sistem terhubung ke jala-jala, membutuhkan tegangan yang lebih tinggi dari pada keluaran photovoltaic. Untuk mengatasi hal ini, topologi konverter boost banyak dikembangkan untuk memperoleh untuk mencapai rasio pengubahan tegangan yang tinggi. Pada tugas akhir ini dibahas mengenai desain dan implementasi konverter DC-DC rasio tinggi berbasis Integrated Quadratic-Boost-Zeta untuk aplikasi photovoltaic.. Kelebihan dari konverter ini adalah memiliki rasio konversi yang tinggi dengan duty cycle kecil dan membutuhkan sedikit komponen. Pada pengujian, konverter ini mampu mengkonversi tegangan masukan 18 VDC menjadi 330 VDC pada duty cycle 65,92%.]]>
