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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Seminar Nasional Aplikasi Teknologi Informasi (SNATI) TEKNIK Mechatronics, Electrical Power, and Vehicular Technology Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Teknosains Jurnal Teknologi Telematika Jurnal IPTEK-KOM (Jurnal Ilmu Pengetahuan dan Teknologi Komunikasi) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika IJITEE (International Journal of Information Technology and Electrical Engineering) Indonesian Journal of Electrical Engineering and Computer Science Jurnal Nasional Teknik Elektro dan Teknologi Informasi
Fransisco Danang Wijaya
Universitas Gadjah Mada
Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mechanical Engineering Social Sciences

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ANALISIS PROFIL VARIASI TEGANGAN DAN KEANDALAN LISTRIK JARINGAN TEGANGAN RENDAH PLN SEMARANG SELATAN BERBASIS DATA-LOGGER Adiwismono, Agus; Wijaya, F. Danang; Tiyono, T.
TEKNIK Vol 35, No 2 (2014): (Desember 2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1442.76 KB) | DOI: 10.14710/teknik.v35i2.7151

Abstract

Pengukuran kualitas dan perhitungan keandalan listrik sampai saat ini masih diperoleh dari data secara manual. Diperlukan alat data-logger yang dapat merekam nilai tegangan (indikator kualitas), dan merekam lama-waktu-padam dan berapa-kali-padam (indikator keandalan) secara realtime, sehingga diperoleh data yang akurat, yang akan meningkatkan mutu dan pelayanan listrik dengan lebih efektif dan efisien. Berbasis data logger maka analisis profil variasi tegangan dapat langsung diketahui yaitu dalam bentuk gambar gelombang (profil) variasi tegangan, demikian pula analisis SAIDI dan SAIFI dapat langsung dilakukan, yaitu dari hasil rekam data selama pengukuran lalu dihitung dengan rumus. Hasil penelitian pada penyulang jaringan tegangan rendah (JTR) SRL01, variasi tegangan yang terjadi adalah: di pangkal penyulang Vmaks = 220 volt, Vmin = 199 volt, dan di tengah penyulang Vmaks = 221 volt, Vmin = 206 volt, dan di ujung penyulang Vmaks = 221 volt, Vmin = 200 volt; dibandingkan terhadap standar variasi Vmaks = 230 volt dan Vmin = 197 volt, maka variasi tegangan yang terjadi sesuai standar. Dari perhitungan, angka lama padam (SAIDI) di sisi JTR penyulang SRL01 0,85 jam/pelanggan/bulan (belum memenuhi standar) dan angka kali padam (SAIFI) 1,05 kali/pelanggan/bulan (sudah memenuhi standar).[The Analysis of Voltage Variation Profile And Electrical Reliability of The Low Voltage Network Using Data-Logger In PLN of South Semarang] Manual measurement applied to the measurement of electricity quality and reliability has resulted in less accurate data. Data logger which records voltage value (quality indicator) and records the realtime duration and frequency of blackouts (reliability indicator) is needed to achieve accurate data, and improve the quality and services effectively and efficiently. By using the data logger the analysis of varied voltage profiles can directly be collected in the form of voltage wave (profiles), and therefore the analysis of SAIDI and SAIFI can be implemented. In the SRL01 low voltage (JTR) feeder, the form of the voltage shows : Vmax = 220 volt and Vmin = 199 volt in starting point feeder, Vmax = 221 volt and Vmin = 206 volt in the middle feeder, Vmax = 221 volt and Vmin = 220 volt in the end point feeder. Compared to the consideration standard, which shows Vmax = 230 volt and Vmin = 197 volt, the result is appropriate. Based on the calculation interruption period quantity (SAIDI) in the side of JTR feeder SRL01 shows the number of 0,85 hour/customer/month (which means it’s still under the standard) and interruption frequency quantity (SAIFI) shows the number of 1,05 time/ customer/month (which means it meets a demand with the standard).Copyright (c) 2014 by Fakultas Teknik, Undip. All right reserved.
REDUCTION OF CURRENT HARMONIC CAUSED BY AC-DC RECTIFICATION WITH HYBRID FILTER FOR ENERGY SAVING LAMP ELECTRONIC BALLAST Handajadi, Wiwik; Wijaya, F. Danang; Sarjiya, Sarjiya
Jurnal Teknologi Vol 6 No 2 (2013): Jurnal Teknologi
Publisher : Jurnal Teknologi, Fakultas Teknologi Industri, Institut Sains & Teknologi AKPRIND Yogyakarta

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Abstract

Penggunaan LHE (Lampu Hemat Energi) yang menggunakan ballast elektronik akan menimbulkan harmonik, baik harmonik arus maupun tegangan dan adanya harmonik akan berakibat kualitas daya listrik menjadi buruk. Disisi lain LHE yang menggunakan ballast elektronik mempunyai sifat- sifat yang baik dalam mengkonversikanenergi listrik menjadi cahaya, karena mempunyai efisiensi diatas 80%. Riset ini melakukan kegiatan yang bertujuan menganalisis kualitas daya listrik pada jaringan distribusi akibat beban LHE dengan ballast elektronik. Selanjutnya dilakukan pengukuran dengan skala laboratorium dan dilanjutkan analisis dengan menggunakan program, untuk itu dianalisis permasalahan yang meliputi: penggunaan ballast elektronik akan menimbulkan harmonik arus maupun tegangan, harmonik yang berpengaruh harmonik ganjil dan harmonik ke-3 paling dominan, harmonik akan berpengaruh pada kualitas daya listrik.Dengan demikian akan ditindak lanjuti upaya untuk memperkecil adanya harmonik khususnya harmonik arus dan selanjutnya dianalisis pengaruh harmonik untuk kapasitas kelompok beban dengan LHE berkapasitas besar pada jaringan distribusi. Untuk penghematan penggunaan energi listrik, khususnya kebutuhan penerangan harus diupayakan adanya konversi energi listrik yang optimal dan efisien, maka dapat digunakan LHE yang menggunakan ballast elektronik dan ditambahkan filter hybrid dapat mengurangi efek negatif yaitu adanya harmonik, sehingga dapat diperoleh kondisi yang efisien pada beban dan optimal pada jaringan distribusi. Dalam penelitian ini dilakukan simulasi dengan program PSIM versi 9.0 dan menggunakan acuan, untuk meminimalkan adanya harmonik arus pada LHE dengan ballast elektronik agar dapat meningkatkan kualitas daya listrik. Dari hasil penelitian ini dapat diperoleh pengurangan besarnya harmonik arus sebesar 10 % akibat penyearahan AC- DC, akibat penggunaan ballast elektronik. Selain itu juga dapat diperoleh cara mengurangi adanya harmonik dengan menggunakan filter hybrid tersebut agar LHE memenuhi standar IEC 61000-3-2. Class C.
ANALISIS AHBC (ASYMMETRIC HALF BRIDGE CONVERTER) PADA SRM (SWITCHED RELUCTANCE MOTOR) 3 FASA MENGGUNAKAN PSIM Jumardi, Jumardi; Wijaya, Danang; Firmansyah, Eka
Jurnal Teknologi Vol 7 No 2 (2014): Jurnal Teknologi
Publisher : Jurnal Teknologi, Fakultas Teknologi Industri, Institut Sains & Teknologi AKPRIND Yogyakarta

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Abstract

AHBC (asymmetric half bridge converter) adalah catu daya yang diperlukan untuk menggerakkan motor SRM (switched reluctance motor). Sebelum membuat peranti catu daya yang sesungguhnya, perlu dilakukan pemodelan untuk mengetahui perilakunya dan memahami interaksi antara konverter tersebut dengan motor. Dalam penelitian ini, AHBC dimodelkan dengan software PSIM untuk diketahui kinerjanya. Variabel yang diamati adalah sudut on dan sudut pulsa. Sudut on adalah sudut untuk menghasilkan putaran maju, besarnya 900. Sudut pulsa adalah sudut untuk menghasilkan putaran dan torsi yang dinginkan, besarnya 00 – 1200. Sudut on dan sudut pulsa dimasukkan ke rangkaian controller untuk menghidupkan dan mematikan rangkaian AHBC yang mensuplai tegangan sumber menuju kumparan stator. Sudut pulsa sama (sudut pulsa1 = sudut pulsa2) menghasilkan putaran, torsi minimal, tegangan, induktansi dan fluks gandeng yang lebih besar daripada sudut pulsa berbeda (sudut pulsa1 sudut pulsa2). Sudut pulsa berbeda menghasilkan arus motor dan rugi-rugi semikonduktor yang lebih besar daripada sudut pulsa sama. Sudut pulsa sama menghasilkan torsi maksimal yang hampir sama dengan sudut pulsa berbeda (1,213 Nm dan 1,216 Nm).
Quasi-flat linear PM generator optimization using simulated annealing algorithm for WEC in Indonesia Azhari, Budi; Wijaya, Fransisco Danang
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 10, No 1 (2019)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3156.212 KB) | DOI: 10.14203/j.mev.2019.v10.29-35

Abstract

Linear permanent magnet generator (LPMG) is an essential component in recent wave energy converter (WEC) which exploits wave’s heave motion. It could be classified into tubular-type, flat-tricore type, and quasi-flat type. In previous researches, these three models have been studied and designed for pico-scale WEC. Design optimization has further been conducted for flat-tricore LPMG, by using simulated annealing (SA) algorithm. It modified some parameters to minimize the resulted copper loss. This paper aims to optimize a quasi-flat LPMG design by applying SA algorithm. The algorithm would readjust the initial LPMG parts dimension. Then, the output of the optimized design would be analyzed and compared. The results showed that the optimization could reduce the copper loss by up to 73.64 % and increase the efficiency from 83.2 % to 95.57 %. For various load resistances, the optimized design also produces larger efficiency. However, the optimized design has a larger size and produces larger cogging force than the initial design.
Optimum Permanent Magnets Configuration in Flat-Quasi Linear Permanent Magnet Generators Fransisco Danang Wijaya; Budi Azhari; Harnoko Stephanus
International Journal of Electrical and Computer Engineering (IJECE) Vol 6, No 6: December 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1277.282 KB) | DOI: 10.11591/ijece.v6i6.pp2589-2602

Abstract

Flat-quasi type of linear permanent magnet generators (LPMGs) have been considered to be applied for several applications, such for wave energy conversion and free piston combustion engine. One of the important issues concerning LPMG is the permanent magnets configuration, due to its effects to the generator’s excitation performance. In this paper, a 1 kW flat-quasi LPMG would be designed and built. During the process, optimum permanent magnets configuration was required and researched. The optimum configuration considered the output power and resulted cogging force. Invetigation was then conducted by modifying several variables, including poles’ arrangement, pole length, number of pole, and pole skewing angle. The modification constraints were total permanent magnets’ volume and generator dimension. The results showed that permanent magnet configuration with halbach arrangement, pole length equals 55% of the slot pitch length, and 61.19o skewing angle produced the optimum output values.
Impedance Matching Method in Two-Stage Converters for Single Phase PV-Grid System L. Heru Pratomo; F. Danang Wijaya; Eka Firmansyah
International Journal of Electrical and Computer Engineering (IJECE) Vol 5, No 4: August 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.4 KB) | DOI: 10.11591/ijece.v5i4.pp626-635

Abstract

This paper presents the study on the impedance matching method in two-stage converters for single phase PV-grid system. The use of PV systems was to obtain the electrical power from the sunlight energy. The system consisted of a Buck-Boost DC-DC converter and a five-level inverter. A Buck-Boost DC-DC converter was used as a means of impedance matching to obtain the maximum power that, in this case, through a method by using the incremental conductance current control algorithm. Meanwhile a five-level inverter was used as an interface to the utilities.  By using this technique, the system came to be simple. The impedance of the power grid, a Buck-Boost DC-DC converter, and a five-level inverter were seen by PV mostly in the area of RMPP, enabling the maximum power produced by the PV to be delivered to the grid. To demonstrate the effectiveness of the design, the analysis and simulation results, furthermore, were provided
Maximum Power Point Tracking using Particle Swarm Optimization Algorithm for Hybrid Wind-Tidal Harvesting System on the South Coast of Java Fransisco Danang Wijaya; Kukuh Daud Pribadi; Sarjiya Sarjiya
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 2: April 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1051.463 KB) | DOI: 10.11591/ijece.v7i2.pp659-666

Abstract

This paper proposes a hybrid wind-tidal harvesting system (HWTHS). To extract maximum power from the wind and tidal, HWTHS implements particle swarm optimization (PSO) algorithm in maximum power point tracking (MPPT) method. The proposed HWTHS had been tested on the range of possible input appropriate to the characteristics of the southern coast of Java. The presented result shows that by using PSO-based MPPT algorithm, maximum power point can be achieved. Thus the efficiency of HWTHS is 92 %, 94 % in wind section and 91 % in tidal section. By using PSO-based MPPT, HWTHS can respond well to changes in wind and tidal speed, whether it's a change from low speed to a higher speed or change from high speed to lower speed wherein time to reach new steady state is ± 0.1 s. At varied wind and tidal speed, PSO algorithm can maintain Cp of the system in the range of 0.47 - 0.48 so that power can be extracted to the maximum.
Optimizing Tri-Core Permanent-Magnet-Linear-Generator Direct-Drive Wave-Energy-Conversion System Design for Sea Wave Characteristics in South Coast Yogyakarta Fransisco Danang Wijaya; Sarjiya Sarjiya; Muhammad Rifa'i Putra Sugita
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 2: April 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (817.995 KB) | DOI: 10.11591/ijece.v7i2.pp610-618

Abstract

According to statistical data, the south coast Yogyakarta has significant ocean wave height which can be used to generate electricity by using wave-energy-converter system. One of the simplest way to convert wave energy to electricity is using direct-drive wave-energy-conversion (WEC) system with permanent-magnet-linear-generator (PMLG). This method is simple because it doesn’t need to convert linear motion to rotational motion. However, PMLG has large electric power losses, has great weight in both of the stator and rotor, and expensive to make. In this paper, a tri-core PMLG was designed. The electric power losses in the winding, translator weight, and manufacturing cost were ideally minimized using multiobjective optimization combined with simulated annealing (SA) algorithm. Then, the design was verified using finite element analysis. The optimized design of this PMLG was simulated using sinusoidal ocean waves which usually occur in the south coast of Yogyakarta to analyze the performance of this linear generator. Simulation result has been shown that this generator can generate 911 watt peak output power at the rated condition and at the optimum load with 81.14% efficiency. This confirms that the optimized design of PMLG is suitable for direct-drive WEC with low power losses and manufacturing cost.
Voltage Control of Single-Phase Two Winding Self Excited Induction Generator Using SVC-MERS for Isolated System Fransisco Danang Wijaya; Hartanto Prabowo
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 7, No 3: September 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v7.i3.pp901-907

Abstract

Single-phase induction generator is very suitable to be used in the typical loads which only need a single-phase power supply with small power capacity requirement, such as diesel engine, picohydro or small wind plant. It has some advantages such as rugged, effective cost, maintenance free and require no external excitation. However, it has inductive characteristic which makes poor voltage regulation. This paper proposed a shunt reactive compensator called SVC-MERS which can provide a variable reactive power to maintain the generator voltage despite of load variations. The experiment was conducted on single-phase two winding induction generator coupled by a three-phase induction motor which serves as the prime mover. SVC-MERS and the load are connected in shunt to the main winding, while the excitation capacitor was connected to the auxiliary winding. The experimental results showed that SVC-MERS can improve voltage regulation and substantially enhanced steady state loading limit.
Design of Full-bridge DC-DC Converter 311/100 V 1kW with PSPWM Method to Get ZVS Condition Toni Prasetya; F. Danang Wijaya; Eka Firmansyah
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 8, No 1: March 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v8.i1.pp59-68

Abstract

Enhancing the switching frequency can increase the power density of a fullbridge dc-dc converter. However, power loss in switches will increase due to the intersection of voltage and current during turn-on and turn-off transition process. The switching power loss can be reduced by making the condition of zero voltage switching (ZVS) which in this study is obtained by using the phase-shifted PWM method. Achieving this condition requires appropriate parameters such as deadtime, leakage inductance, and the primary current of transformer in sufficient value. In this study, ZVS is achieved when the transformer leakage inductance of 14.12 μH is added with external inductance of 24.29 μH which is installed in series with transformer and when the primary current of transformer is more than 1.289 A.
Co-Authors A.A. Ketut Agung Cahyawan W Achmad, Fariz Adha Imam Cahyadi Adlan Bagus Pradana Agus Adiwismono Amrisal Kamal Fajri Andriyatna Agung Kurniawan Artakusuma, Dwi Dharma Bambang Sutopo Bambang Sutopo Budi Azhari Budi Azhari Denny Haryanto Sinaga Dwi Dharma Artakusuma Dyah Ayu Kartika Sari Edi Susilo Eka Firmansyah Eka Firmansyah Ekrar Winata Gusti Agung Ayu Putri Hartanto Prabowo Hilman Zarory Husni Rois Ali I Wayan Adiyasa iftitah imawati Johan Agung Irawan Kevin Gausultan Kristianto Adi Widiatmoko Kukuh Daud Pribadi L. Heru Pratomo Leonardus Heru Pratomo Lesnanto Multa Putranto Mohammad Rustam M. L. Mohd. Brado Frasetyo Mokhammad Isnaeni Bambang Setyonegoro Muhammad Ridwan Muhammad Rifa'i Putra Sugita Muhammad Yasirroni Ningtias, Dieta Wahyu Asry Noviarianto, Noviarianto Pebri Prihatmoko Ridi Ferdiana Roni Irnawan Roy Bayu Negara Rudy Hartanto S.Pd. M Kes I Ketut Sudiana . Sarjiya Sayuri Egaravanda Sidik, Yohan Fajar Sriyono Stephanus, Harnoko Suharyanto Suharyanto T. Haryono Tiyono Toni Prasetya Tumiran Wiwik Handajadi, Wiwik Yuwono Bimo Purnomo Zarory, Hilman