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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Makara Journal of Technology
Aries Subiantoro
Electrical Engineering Department, Faculty Of Engineering University Of Indonesia, Depok 16424, Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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 1 
Critical Condition of Sensorless Induction Generator Using Flux Weakening in Wind Turbine Application Nanda Avianto Wicaksono; Abdul Halim; Aries Subiantoro; Feri Yusivar
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 7, No 1: March 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v7.i1.pp202-216

Abstract

This paper was intended to examine thoroughly a critical condition of the sensorless induction generator using flux weakening in wind turbine application. The critical condition would happen when the rotor speed reached the critical rotor speed reference. The critical rotor speed reference was the highest of the rotor speed reference that still caused the stable response. It was obtained by increasing the rotor speed reference until the system response became unstable. In the low speed range of wind showed that there was no unstable condition whatever a rotor speed reference was set. On the other hand, there was a critical rotor speed reference in the medium and high speed range of wind. The unstable condition was caused by the induction generator that received a power higher than its capacity, so its rotor speed couldn't be maintained at reference value. The first solution was suggested that the stable condition would be made by setting the rotor speed reference at the minimum critical reference. The second solution was suggested that the controlling rotor speed in triangle area between the critical condition and the operation that used the minimum critical reference for the rotor speed reference. In the triangle area, the rotor speed was controlled by setting the tip speed ratio.
Single Phase PV Grid-Connected in Smart Household Energy System with Anticipation on Fault Conditions Feri Yusivar; Rian Suryadiningrat; Aries Subiantoro; Ridwan Gunawan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 4, No 1: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper proposes an algorithm of Smart household energy systems to anticipate fault conditions in power system grid. Single phase PV grid-connected in smart household energy system is a smart system that determines electrical supply conditions to the load in residential electrical system. The smart system is consisted of two voltage source, conventional electricity system from national electricity provider as preferred source and photovoltaic as the alternative source. In smart system, fault conditions can be anticipated by selecting the appropriate voltage sources to supply the load. The condition of smart system can be described in power flow regulation to the load by detection and identification of amplitude, phase angle, and frequency of the voltage source compared to the system reference. The system mechanism is based on detection of voltage source using static transfer switch (STS) with phase locked loop (PLL) as voltage detection algorithm which output is used to determine decision logic algorithm for switching conditions. The results show that conditions of smart power system flow can be obtained based on voltage source selection in decision logic when fault condition occurs.DOI: http://dx.doi.org/10.11591/ijpeds.v4i1.5368
Control of DFIG Stator Voltage on Autonomous Micro Hydro Power Plant Feri Yusivar; Nanda Avianto Wicaksono; Aries Subiantoro; Ridwan Gunawan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 7, No 2: June 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (346.049 KB) | DOI: 10.11591/ijpeds.v7.i2.pp498-508

Abstract

An autonomous micro hydro power plant was proposed to utilize the small hydro power potency as a run-of-river. It consisted of a PMSG, a DFIG, and a converter and should be operated in the off-grid configuration. In a previous research, the DFIG stator voltages couldn’t be controlled. In this paper, the novel control algorithm that is able to maintain the DFIG stator voltages of the autonomous micro hydro power plant in the off-grid configuration is proposed. The control algorithm was proposed to use the actual DFIG stator voltages and currents as feedback signals. The controller was tested by varying three input signals, i.e. the DC-link voltage, the DFIG stator voltage reference, and the external stator load which simulated the off-grid configuration. The result of the simulation showed that the DFIG stator voltages could be controlled and were always in accordance with the reference.
Modeling of Coupled-Tank System Using Fuzzy Takagi-Sugeno Model Subiantoro, Aries
Makara Journal of Technology Vol. 10, No. 1
Publisher : UI Scholars Hub

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Abstract

Modeling of Coupled-Tank System Using Fuzzy Takagi-Sugeno Model. This paper describes modeling of coupledtank system based on data measurement using fuzzy Takagi-Sugeno model. The fuzzy clustering method of Gustafson- Kessel algorithm is used to classify input-output data into several clusters based on distance similarity of a member of input-output data from center of cluster. The formed clusters are projected orthonormally into each linguistic variables of premise part to determine membership function of fuzzy Takagi-Sugeno model. By estimating data in each cluster, the consequent parameters of fuzzy Takagi-Sugeno model are calculated using weighted least-squares method. The resulted fuzzy Takagi-Sugeno model is validated by using model performance parameters variance-accounted-for (VAF) and root mean square (RMS) as performance indicators. The simulation results show that the fuzzy Takagi-Sugeno model is able to mimic nonlinear characteristic of coupled-tank system with good value of model performance indicators.
Modeling of a New Structure of Precision Air Conditioning System Using Secondary Condenser for Rh Regulation Subiantoro, Aries; Nasruddin, Nasruddin; Yusivar, Feri; Al-Hamid, Muhammad Idrus; Budiardjo, Bagio
Makara Journal of Technology Vol. 16, No. 1
Publisher : UI Scholars Hub

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Abstract

A dynamic mathematical model for a new structure of precision air conditioning (PAC) has been developed. The proposed PAC uses an additional secondary condenser for relative humidity regulation compared to a basic refrigeration system. The work mechanism for this system and a vapour-compression cycle process of the system are illustrated using psychrometric chart and pressure-enthalpy diagram. A non-linear system model is derived based on the conservation of mass and energy balance principles and then linearized at steady state operating point for developing a 8th-order state space model suited for multivariable controller design. The quality of linearized model is analyzed in terms of transient response, controllability, observability, and interaction between input-output variables. The developed model is verified through simulation showing its ability for imitating the nonlinear behavior and the interaction of input-output variables.
Sistem Pembangkit Laju-Aliran-Rendah Fluida Cair Presisi Tinggi menggunakan Kendali PID SUTANTO, HERI; HAQQI, MUHAMMAD SABILA; SUBIANTORO, ARIES; KUSUMOPUTRO, BENYAMIN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 10, No 3: Published July 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v10i3.712

Abstract

ABSTRAKPeralatan infus medis seperti syringe pump dan infusion pump semakin banyak digunakan di rumah sakit dan fasilitas-fasilitas kesehatan. Kalibrasi peralatan tersebut sangat krusial dilakukan untuk mengidentifikasi penyimpangan pengukuran dan menghindari kerugian klinis hingga mortalitas. Peralatan tersebut umumnya dikalibrasi dengan metode perbandingan terhadap Infusion Device Analyzer (IDA). Untuk memastikan ketertelusuran kalibrasi tersebut, IDA perlu dikalibrasi, salah satunya dengan metode gravimetrik. Namun, kendala terbesar dalam kalibrasi IDA adalah membangkitkan laju aliran rendah dengan keberulangan yang baik dan kepresisian tinggi. Pada penelitian ini telah dibangun sebuah sistem pembangkit laju aliran rendah fluida cair presisi tinggi menggunakan kendali PID lingkar tertutup dengan kecepatan motor DC sebagai feedback. Hasil pengujian menunjukkan bahwa sistem dapat membangkitkan laju aliran pada rentang ukur 100 ml/jam kemudian turun ke 10 ml/jam. Ketidakpastian pengukuran yang diperoleh antara 0,06% pembacaan sampai 0,24% pembacaan, pada tingkat kepercayaan 95% dengan faktor cakupan k=2. Sistem yang dikembangkan layak digunakan dalam kalibrasi IDA.Kata Kunci: kalibrasi, peralatan infus medis, laju aliran rendah, kendali PID, ketidakpastian pengukuran ABSTRACTMedical infusion such as syringe pump and infusion pump are widely used in hospitals and health facilities. Calibration of the equipments are crucial in order to identify any measurement errors and to avoid clinical losses which may lead to mortality. The equipments are generally calibrated by an Infusion Device Analyzer (IDA). To ensure the traceability of the calibration results, IDA needs to be calibrated, one of which is by the gravimetric methods. However, the biggest problem in the calibration of IDA is generating low flow rates with good repeatability and high precision. In this research, the high-precision liquid low flow rate generator system has been built using a closed-loop PID control with DC motor speed as feedback. The results showed that the system was able to generate low flow rates at 100 ml/h then down to 10 ml/h. The uncertainty of calibrations range were from 0.06% to 0.24% of reading, at 95% confidence level with a coverage factor k=2. Hence, the system is suitable to be used in IDA calibration.Keywords: calibration, medical infusion, low flow rate, PID control, measurement uncertainty
Optimasi Kinerja Fuel Cell pada Sistem Kereta Hibrida menggunakan Metode External Energy Maximization Strategy RAMADHAN, AGUNG; SUBIANTORO, ARIES; WIJAYA, JUAN THOMAS; SYAMAUN, SYAFIIE
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 11, No 2: Published April 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v11i2.537

Abstract

ABSTRAKDalam sistem sumber daya hibrida, strategi manajemen energi (EMS) pada dasarnya hanya mengatur pembagian daya tanpa mempertimbangkan optimalisasi kinerja sistem. Oleh karena itu pada penelitian ini dirancang EMS berbasis optimasi pada kereta hibrida dengan sumber daya fuel cell (FC), baterai dan superkapasitor dengan metode External Energy Maximization Strategy (EEMS). Strategi ini dirancang untuk memaksimalkan energi yang disuplai oleh baterai dan superkapasitor melalui state of charge (SOC) baterai dan tegangan DC bus sehingga dapat meminimalisasi konsumsi hidrogen dan meningkatkan efisiensi keseluruhan sistem. Hasil simulasi memperlihatkan bahwa strategi ini mampu memaksimalkan kinerja baterai dan superkapasitor. Efisiensi sistem berhasil ditingkatkan menjadi 86,37% dan konsumsi hidrogen berhasil dikurangi 10% dari strategi pembandingnya. State of charge (SOC) baterai juga mampu dipertahankan untuk tetap dalam rentang batas yang telah ditentukan.Kata kunci: EMS, kereta hibrida, fuel cell, baterai, superkapasitor, optimasi ABSTRACTThe energy management strategy (EMS) in a hybrid system essentially only regulates power sharing without considering system performance optimization. This study developed an EMS based on the optimization of hybrid train with fuel cell (FC), battery, and supercapacitor power sources using the External Energy Maximization Strategy (EEMS). This strategy is intended to maximize the energy supplied by battery and supercapacitor through the SOC of the battery and DC bus voltage, thereby reducing hydrogen consumption and increasing overall system efficiency. The simulation results show that this strategy can maximize battery and supercapacitor. The system efficiency was successfully increased to 86.37%, and the hydrogen consumption was reduced by 10% when compared to the comparison strategy. The SOC of the battery can also be kept within a certain range.Keywords: EMS, hybrid train, fuel cell, battery, supercapasitor, optimization
Multi-Model Predictive Control on HVAC Chilled Water Pump for Temperature Control and Energy Consumption Reduction for Auditorium RIZKI, MUHAMMAD AFIFF; SUBIANTORO, ARIES
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 3: Published July 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i3.271

Abstract

Most energy consumption comes from the high demand from buildings. A large portion from buildings comes from the HVAC systems. A proper optimal control strategy is needed for energy savings. This paper proposes a multi-model MPC strategy for controlling the chilled water pump HVAC to reduce energy consumption for an auditorium in MAC UI building. The building model is modeled in EnergyPlus software, while the control strategy is modeled using MATLAB where both software communicates using BCVTB. The developed control performance has been tested under different operating conditions and different set of temperature changes. The result shows that the proposed controller can reduce the total energy consumption of chilled water pump by 13.1% compared to the existing On/Off controller.
Co-Authors Abdul Halim Al-Hamid, Muhammad Idrus Bagio Budiardjo Bagio Budiardjo Benyamin Kusumoputro Feri Yusivar Feri Yusivar HAQQI, MUHAMMAD SABILA Heri Sutanto Muhammad Al-Hamid Muhammad Al-Hamid, Muhammad Nanda Avianto Wicaksono Nasruddin Nasruddin Nasruddin Nasruddin Ramadhan, Agung Rian Suryadiningrat Ridwan Gunawan Ridwan Gunawan RIZKI, MUHAMMAD AFIFF SYAMAUN, SYAFIIE WIJAYA, JUAN THOMAS