Daru Tri Nugroho
Program Studi Teknik Elektro, Universitas Jenderal Soedirman, Purwokerto Jl. Mayjend Sungkono KM 5 Blater Purbalingga 53371

Published : 9 Documents
Articles

Found 9 Documents
Search

New Dead-Time Compensation Method of Power Inverter using Carrier Based Sinusoidal Pulse-Width Modulation Suroso, Suroso; Nugroho, Daru Tri; Noguchi, Toshihiko
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 6: December 2018 (Part II)
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Original Source | Check in Google Scholar

Abstract

A new dead-time compensation method of power inverter circuits is suggested and presented in this paper. The proposed method utilizes carrier based sinusoidal pulse width modulation technique to produce driving signals of the inverter power switches with dead-time correction capability. The proposed method able to eliminate dead-time effects such as reducing the waveform distortion of the inverter output current, and increasing the fundamental component amplitude of output current. An analysis of the proposed method is presented. Some computer simulations were carried out to investigate the principle operation, and to test performance of the new method. The developed method was validated through experimental test of H-bridge voltage source inverter circuits. The data obtained from the computer simulation and prototype experiments have confirmed that that the proposed method worked well compensating the dead-time in the voltage source power inverter circuits.
ANALISIS TEMPERATUR SAMBUNGAN KABEL XLPE TEGANGAN MENENGAH 20 KV UNTUK BERBAGAI TORSI Nugroho, Daru Tri
Techno Jurnal Ilmu Teknik Vol 12, No 2 (2011): Jurnal Techno Oktober 2011
Publisher : UMP

Show Abstract | Original Source | Check in Google Scholar

Abstract

For insulated cable, heat factor is something that has to concern. Current capacity of a cable was influenced by characteristics of cable component. Losses at the cable will cause heat that would overcome through cable component with high resistance before it takes by environmental enclosed. The heating process will cause insulation material. Over heating process will fail insulation material and decrease lifetime of cable.Experiment on connector temperature of 20 kV middle voltage XLPE cable was doing by injecting constant alternating current from current injector to N2XEBY underground cable type that had cable connector. The test was by giving the different current level, using connector with different material, also with different torque for tightened connector bolt. In this test, we measure temperature on the cable junction every 5 minutes until the temperature equilibrium reaches.From the experiment we find that electrical current injection causes temperature to increase on cable parts until equilibrium. From relationship between current increasing and temperature increasing on cable parts we can see that maximum temperature increasing happened when it reaches equilibrium and time constant. We also see connector material and relationship torque for tightened cable connector bolt influence temperature and contact area increase. Key word : Termal characteristic, Cable connector, XLPE cable, Tourque, Equilibrium temperature
PENGEMBANGAN FIVE-LEVEL CURRENT-SOURCE INVERTER YANG DILENGKAPI DENGAN BOOST-UP CHOPPER Suroso, Suroso; Nugroho, Daru Tri
PROSIDING SENATEK FAKULTAS TEKNIK UMP 2015: PROSIDING SENATEK TAHUN 2015, 28 November 2015
Publisher : PROSIDING SENATEK FAKULTAS TEKNIK UMP

Show Abstract | Original Source | Check in Google Scholar

Abstract

This paper presents a circuit of the five-level current source inverter equipped with boost-up chopper fo DC-AC power converter. The inverter circuits work generating an AC five-level PWM output current, while the boost-up chopper work to step-up the DC input voltage. In order to obtain a smaller harmonic distortion of the output current, pulse width modulation (PWM) technique is employed which only use two triangular carrier waveform. The boos-up chopper circuits is controlled using proportional-integral controller (PI) to keep a stable DC voltage at the DC capacitor. The circuits is tested using computer simulation with PSIM software. The test results show that the inverter circuits equipped with boos-up chopper works well producing an AC five-level PWM current with small distortionKey words: photovoltaic, inverter, power grid, harmonics
BOOST-UP CHOPPER 24 V/320 V DENGAN KENDALI PROPORSIONAL-INTEGRAL (PI) BERBASIS MIKROKONTROLLER Suroso, Suroso; Nugroho, Daru Tri; Siregar, Dolly Arthur
Transmisi Vol 18, No 2 April (2016): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Original Source | Check in Google Scholar | Full PDF (277.89 KB)

Abstract

Makalah ini menyajikan pengujian prototip boost-up chopper 24 V/320V DC dengan kendali Proporsional Integral (PI) berbasis mikrokontroller. Mikrokontroller diaplikasikan untuk menghasilkan sinyal kontrol yang mengatur duty cycle untuk menswitch saklar Isulated Gate Bipolar Transistor (IGBT) pada rangkaian chopper. Metode kontrol PI ini juga bekerja untuk memperoleh tegangan output dari boost-up chopper yang lebih stabil. Berdasarkan hasil pengujian secara simulasi komputer dan uji prototip di laboratorium menunjukkan bahwa kontroller dan prototip chopper mampu bekerja seperti yang direncanakan dan mampu menghasilkan nilai tegangan output yang baik dengan margin of error 2,18% dibandingkan dengan target tegangan output 320 VDC.
Pengaruh Arus Harmonisa Pada Unjuk Kerja Sistem Open-Loop Variable Speed Drive Motor Induksi Menggunkanan Inverter Suroso, Suroso; Winasis, Winasis; Nugroho, Daru Tri; Prakoso, Sebastian Adi
Dinamika Rekayasa Vol 12, No 1 (2016): Dinamika Rekayasa Februari 2016
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1027.452 KB)

Abstract

One of the  the inverter’s applications is in Variable Speed Drive (VSD) to control the speed of an induction motor by varying  the voltage or the output frequency of the inverter. Induction motor reliability driven by using inverter is often affected by harmonics components of the current and voltage  generated by the inverter. This phenomenon brings harmonic losses in the industry process applying VSD and induction motors, because not all inverters produce a pure sinusoidal wave. Thi paper presents the effect of harmonics on the performance of squirrel cage induction motor type i.e. the speed, torque and efficiency by conducting computer simulation and experimental test in laboratory. The increase in the value of harmonics resulting an increase in the value of speed 1.41%, an increase in the value of torque 1.81 Nm, and decreased of efficiency 1to5%, the harmonics also resulted torque ripple 2 to5 times resulting in unstable speed of motor, arising engine vibration and causing motor heating
DESAIN DAN SIMULASI SISTEM HMI (Human Machine Interface) BERBASIS CITECT SCADA PADA KONVEYOR PROSES DI INDUSTRI Priswanto, Priswanto; Herdantyo, Tegar; Nugroho, Daru Tri; Ramadhani, Yogi; Mubyarto, Agung
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2018: SEMINAR NASIONAL PENDIDIKAN SAINS DAN TEKNOLOGI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Original Source | Check in Google Scholar

Abstract

The conveyor system is a technology for transfer object to processing in industry from one place to another. The process in the industry such as quality control, packing product, assembly, etc. Conveyor technology is needed in the industrial process  automation.  The  application  of  conveyor  system  technology  in  the industry requires acquisition data and control, so that each process on the industrial conveyor can be monitored and even controlled from the control room. The one of technology for acqusition data and controling process of industry by centrally from the  control room is the technology of  HMI  (Human Machine Interface). The development of this HMI technology can be complement PLC- based conveyor system technology, making it more flexible and efficient by providing visualization and even control of industrial processes. In this research, Modeling of HMI using Citect SCADA has been conducted for Acquisition Data and Controlling Process of Conveyor Systems in Industry. The model of HMI designed and made using Vijeo Citect SCADA by adjusting the form of process conveyor models in the industry including input and output system. Based on the research that has been done, the results of HMI can work well, with a 100% success percentage. This shows that the addition of the HMI module to the system does not affect the performance of the conveyor system, but with the HMI feature it will be easier to control the process in the industry from the control room. Keywords: HMI, conveyor, PLC, Citect SCADA, industry.
Analisis Unjuk Kerja Prototip Sistem Pengiriman Daya Nirkabel Jenis Resonansi Magnetik Menggunakan Inverter Setengah Jembatan Dan Kumparan Helix Suroso, Suroso; Prasetijo, Hari; Nugroho, Daru Tri; Qosim, Marlin Ibnu
Dinamika Rekayasa Vol 14, No 2 (2018): Dinamika Rekayasa - Agustus 2018
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1048.619 KB)

Abstract

Makalah ini menyajikan hasil perancangan, pengujian dan analisis unjuk kerja prototip sistem?pengiriman daya nirkabel menggunakan inverter setengah jembatan dengan teknik resonansi magnetik frekuensi 100?kHz. Pengiriman daya menggunakan rangkaian resonansi magnetik bekerja memindahkan energi listrik dari rangkaian?pengirim ke rangkaian penerima melalui resonator yang beroperasi pada frekuensi resonansi. Pada penelitian ini?bagian pengirim dan penerima menggunakan kumparan kawat tembaga berdiameter 1,2 mm berbentuk kumparan helix?dengan diameter kumparan 10 cm. Catu daya pengirim menggunakan sumber DC 12 V dan dihubungkan dengan?inverter setengah jembatan. Sisi penerima dihubungkan dengan rangkaian penyearah diode yang dilengkapi dengan?filter untuk mendapatkan tegangan DC. Rangkaian inverter dibuat menggunakan saklar semikonduktor daya?MOSFET. Berdasarkan hasil pengujian prototip di laboratorium diperoleh bahwa efisiensi pengiriman daya berkurang?terhadap jarak. Semakin jauh jarak antara kumparan pengirim terhadap kumparan penerima, maka efisiensinya?menurun. Frekuensi sinyal yang dikirim relatif tetap meskipun jarak kumparan pengirim terhadap kumparan penerima?berubah. Sudut antara kumparan penerima terhadap kumparan pengirim yang memberikan efisiensi terbaik adalah 00.?Selain itu, untuk hasil pengujian ketika terdapat media yang bersifat isolator di antara kumparan pengirim dan?penerima maka transfer daya tidak terganggu. Tetapi ketika terdapat media konduktor maka daya akan terserap oleh?konduktor tersebut sehingga efisiensi semakin kecil.
A nine-level hybrid current source inverter using common-emitter topology and inductor-cell Suroso, Suroso; Nugroho, Daru Tri; Noguchi, Toshihiko
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 2: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Original Source | Check in Google Scholar

Abstract

A different circuit structure of nine-level current source power inverter is presented and discussed in this manuscript. The proposed topology is based on the common-emitter inverter topology equipped with an inductor-cell circuit. The common-emitter inverter works as the main inverter circuits delivering a three-level AC current waveform. The inductor-cell circuit produces the intermediate output current levels for nine-level current output waveform. Proportional integral current controller was applied to regulate the current streaming thru the inductor-cell. Multi triangular carrier signals based sinusoidal pulse width modulation method was utilized to obtain a lower waveform distortion. The proposed nine-level inverter circuit was tested and examined. The test results verified that the new nine-level inverter circuit worked well producing a nine-level current waveform with less low-frequency harmonic components.
Parallel Operation of Current-Source Inverter for Low-Voltage High-Current Grid-Connected Photovoltaic System Suroso, Suroso; Nugroho, Daru Tri; Amran, Amran; Noguchi, Toshihiko
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 4: August 2019 (Part I)
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Original Source | Check in Google Scholar

Abstract

Solar energy is very potential to be developed in a tropical country such as in Indonesia. This energy source is eco-friendly because it can eliminate air pollution such as caused by conventional fossil fuels. This research article presents analysis results of a novel grid-connected photovoltaic system using low-voltage high-current system. The electrical energy produced by the photovoltaic system was sent into the electrical power grid using two or more H-bridge current source inverters operated in parallel. The proposed system is very suitable for large size photovoltaic system because of its some merits. The inverter circuits work generating sinusoidal output currents and controlling the power delivered into the grid. The test results of the new system showed that the system worked properly as interface between photovoltaic system and the electrical grid delivering high ac current with low harmonic distortion.