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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Bulletin of Electrical Engineering and Informatics Angkasa: Jurnal Ilmiah Bidang Teknologi KURVATEK Indonesian Journal of Electrical Engineering and Computer Science E-Jurnal Manajemen Trisakti School of Management (TSM) Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Sugiarto Kadiman
Institut Teknologi Nasional Yogyakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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The Dynamic of Synchronous Generator under Unbalanced Steady State Operation: A Case of Virtual Generator Laboratory Sugiarto Kadiman; Arif Basuki; Mytha Arena
International Journal of Electrical and Computer Engineering (IJECE) Vol 5, No 6: December 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (565.944 KB) | DOI: 10.11591/ijece.v5i6.pp1292-1303

Abstract

The purpose of this study is to design and develop a synchronous generator virtual laboratory for undergraduate student courses, which can be treated as an accessorial tool for enhancing instruction. Firstly, the study reviews the general concept and algorithm of synchronous generator model. Secondly, the simulation method of this system is discussed. Finally, the paper introduces its example and analysis. One of the major objectives of this project is the dynamics of synchronous generators connected to the 500 kV EHV Jamali (Jawa-Madura-Bali) System under unbalanced steady state condition that could be modeled as a balanced synchronous generator’s model with unbalanced voltage inputs. The balanced synchronous generator model based on the rotor’s qd0 reference frame was chosen to substitute generator’s model embeded in loadflow analysis. The verification of the proposed generator’s model was checked by comparing it with a PSS Tecquiment NE9070 simulator. The unbalanced voltage inputs of generator were derived utilizing the loadflow analysis by determining the phase and sequence currents, and average bus voltages of the 500 kV EHV Jamali grid considering unbalanced portion variations. Meanwhile, the load locations having significant effect on the test generators are obtained by using the electricity tracing method. The developed virtual laboratory with a given example demonstrated the usefulness of the tool for studying synchronous generator under unbalanced steady-state operation.
Teaching power system stabilizer and proportional-integral-derivative impacts on transient condition in synchronous generator Sugiarto Kadiman; Oni Yuliani; Trie Handayani
Bulletin of Electrical Engineering and Informatics Vol 10, No 5: October 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i5.3087

Abstract

Understanding the concepts based on problem solving is not an easy methodology in teaching the impact of power systems stabilizer (PSS) on transient synchronous generator using MATLAB capability. Experiments conducted in simulating sessions play an important role in this teaching. This simulation can simulate power system stability behavior with reasonable accuracy in less time. This transient phenomenon of a power system utilizing synchronous generator and modelling by fully three-phase model with changes in stator flux linkages neglected is analyzed by employed single machine infinite bus taken to the power system. Whereas a power system stabilizer which consist of a wash-out circuit, two stages of compensation, a filter unit, and a limiter, is applied to control voltage and frequency of power systems in transient condition. Proportional-integral-derivative (PID) controller tuned by Ziegler-Nichols’s method is cascaded to conventional PSS in order to enhance the response time of system while providing a better result in damping for oscillation. This gives the clear idea about PSS and PID controller impacts on transient synchronous generator and its enhancement to the students of electrical engineering program, Institut Teknologi Nasional Yogyakarta.
TECHNO-ECONOMIC ASSESMENT FOR DISTRIBUTED GENERATION PLACEMENT IN DISTRIBUTION SYSTEM Sugiarto Kadiman
KURVATEK Vol 4 No 1 (2019): Reka Ruang
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i1.1132

Abstract

This paper presents a proposed function which is known as techno-economic model for optimal placement of distributed generation (DG) resources in distribution systems in order to minimize the power losses and improve voltage profile. Combined sensitivity factors (CSF), such real power loss reduction index, reactive power loss reduction index, voltage profile improvement index, and life cycle cost, and particle swarm optimization (PSO) are applied to the proposed technique to obtain the best compromise between these costs. Simulation results on IEEE 14-bus test system are presented to demonstrate the usefulness of the proposed procedure.
SISTEM PENCAHAYAAN DENGAN FUZZY LOGIC CONTROLLER Arif Basuki; Sugiarto Kadiman; Rizki Ismail
KURVATEK Vol 6 No 1 (2021): April 2021
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v6i1.2262

Abstract

A “newest” room lighting system always links with environmental issues for reducing the consumption of primary energy such as coal and oil. The process carry out by adding natural lighting as solar lighting into artificial lighting. But the problem in combining these systems depends significantly on the condition of natural lighting, such as on weather conditions and light interference based on building construction (isolated or not isolated). Smart systems such as fuzzy logic can be used solution the problem. From the results of this study is artificial lighting can be reduced by half from its maximum condition but with different error margins depending on amount of light interference obtained. The values of these results can be monitored in real-time with IoT (Internet of Thing) media. Keywords: “The newest” lighting systems, Artificial and natural hybrid system, Fuzzy logic controller, monitoring error margin, IoT monitoring
DAMPAK PEMBERIAN IMPULS ARUS TERHADAP TINGKAT PERLINDUNGAN ARRESTER TEGANGAN RENDAH Diah Suwarti Widyastuti; Sugiarto Sugiarto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.33 KB) | DOI: 10.28989/angkasa.v7i2.151

Abstract

Arrester is a device used to protect equipment and electrical systems against overvoltage that one reason is the surge of lightning. Because lightning is a natural phenomenon that the process can not be predicted about time and magnitude of the impulse currents, and if arrester hit by lightning impulse with high peak current value and than arrester is feared can not operate as it should. This research use three impulse current peak value there are 533.33A (0.03 pu), 3866.6A (0.3 pu) and 6858.7A (0.5 pu) tested at low voltage arresters. The test results shown the highest value of leakage current arrester at a maximum voltage of operation (Uc) after buffeted by the current impulse has a value of leakage current 0,32 mA, 0,33 mA and 0,33 mA respectively, still below 1 mA (corresponding international standard IEC 61643-1 Edition 2.0 03/2005). Based on the value of leakage current, it can be said that the arresters in good condition and have not changed the characteristics of volt-ampere (current leaking still relatively the same) and still have good insulating properties even after the current impulse overwritten. The highest value of residual voltage arresters at the peak impulse voltage 10 kV, 15 kV, 20 kV and 24 kV, is 1124 Volt meaning that the margin has exceeded the limit of endurance voltage VW1 class (1000 Volts) amounted to 112.4%, and not exceed the VW2 (2000 Volt) amounted to 43.5%, according to ISO standard 04-7021.21-2004, arresters can be used to protect the electrical equipment with voltage endurance on VW2 class.
Virtual Laboratory of Unbalanced Transient Condition in Synchronous Generator Sugiarto Kadiman; Arif Basuki; Diah Suwarti
Indonesian Journal of Electrical Engineering and Computer Science Vol 5, No 1: January 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v5.i1.pp1-10

Abstract

The electrical engineering department at the Sekolah Tinggi Teknologi Nasional (STTNAS), Yogyakarta has recently reconnoitered virtual laboratories for its undergraduate synchronous generator course to complement existing full-scale laboratory equipment. This study explores virtual laboratory development to be treated as an accessorial tool for enhancing instruction. The focus of this synchronous generator course is the dynamic transient behavior of the system after small disturbances as affected by the unbalanced load. The work is mainly carried out through nonlinear simulations under Matlab-Simulink. Results of the first version of the synchronous generator virtual laboratory and details of its development are provided.
KEBIJAKAN UTANG DI SEKTOR PROPERTY, REAL ESTATE DAN BUILDING CONSTRUCTION Febriana Fousta Dewi Kadiman; Satriyo Wibowo
E-Jurnal Manajemen Trisakti School of Management (TSM) Vol 2 No 2 (2022): E-Jurnal Manajemen Trisakti School of Management (TSM)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat Sekolah Tinggi Ilmu Ekonomi Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.234 KB)

Abstract

The purpose of this research is to examine the impact of asset structure (SAT), liquidity (CR), profitability (ROA), dividend policy (DPR), institutional’s ownership (IO) and business risk (RISK) on debt policy. This research used property, real estate and building construction sector companies that listed in Indonesia Stock Exchange period 2015-2020 as the sample research. There are 42 data sampled from seven companies. Purposive sampling is used as the sample research method. Descriptive statistics and multiple regression analysis are used to analyze the data. The result of this research showed that ROA and RISK have positive and significant relationship with debt policy. While SAT, CR, DPR and IO have no influence to policy. Therefore, profitability and risk business should be concerned by the companies to make a decision about debt policy.
Impact of Damper Windings on Unbalanced Steady-State Performance of Synchronous Generator connected to the 500 KV EHV Jamali System Sugiarto Kadiman
Retii Prosiding Seminar Nasional ReTII ke-13 2018
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Unbalanced loads, such as unequal voltage magnitudes at the fundamental of both system frequency and phase angle deviation, are inrehent in 500 kV EHV Java-Madura-Bali (or Jamali) System. This crucial unbalanced loads may cause overheating of the machineries including synchronous generators (SG) which is a source of electrical energy generation system. To decrease the unbalance, damper windings are installed in SG. This study is to investigate the performance of three different damper winding configurations of a SG under unbalanced steady-state condition. By the SGs simulator, induced currents of damper windings under the unbalanced steady-state system conditions are measured and analyzed.  The value of the generator’s inputs is derived through unbalanced Newton-Raphson loadflow analysis on the Jamali System. Clearly that the damper windings have contributed the stability effectively and increased the maximum output. Moreover, there were little lower power angle of the SGs because the damper windings reduced the unbalanced loads.Keywords: damper windings, 500 kV EHV Jamali System, unbalanced steady state
Higher order model of synchronous generator Sugiarto Kadiman; Oni Yuliani
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 14, No 3: September 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v14.i3.pp1442-1449

Abstract

Synchronous generator conventional model accurately describes only the stator circuit. Concerning the transients for rotor quantities, for example rotor voltage, rotor current, and rotor magneto-motor force, conceivable predetermined with acceptable accuracy if calculations are created on equivalent model properly on consideration of field and damper together with stator circuits. Unfortunately, it was recognized that simulated responses using conventional model with calculated machine parameters often did not match well with actual measured responses, particularly in the quantity’s rotor winding. For this intention, the newly method to producing the rotor circuit is to model it as well as the lines that conventionally viewed as the partition of current paths from the physical construction. Besides the physical field and damper circuits, a third circuit for the eddy currents induced in the pole surface could also be added. The all conclusions prove the correctness of synchronous generator model.
Model development of bond graph based wind turbine Sugiarto Kadiman; Oni Yuliani
Indonesian Journal of Electrical Engineering and Computer Science Vol 33, No 2: February 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v33.i2.pp715-726

Abstract

Just recently, wind energy continues to be one of most important renewable energy resources, by cause of its production is ecologically friendly; for that reason, the technology built for the renewable energy production by way of wind turbines takes excessive challenges in the study. Due to several physical domains prevailing in wind turbine, namely aerodynamical, mechanical and electrical, the modeling of wind turbine is problematic; thus, modeling based on physical techniques has a superior reliability in these circumstances. One of these approaches is bond graph modeling that model system evolved from conservation law of both of mass and energy comprising in the structures. This study presents modeling the parts of bond graph-based wind turbine. Then, sub models are connected together to attain the entire model of wind turbine for simulation based on 20-Sim software. The proposed wind turbine is 2.5 kW of variable velocity wind turbine with three blades, gearbox, tower, and doubly-fed induction generator type. The effectiveness of bond graph modeling system on wind turbine has been proven in simulation results.
Co-Authors Arif Basuki Diah Suwarti Widyastuti Mytha Arena Oni Yuliani Rizki Ismail SATRIYO WIBOWO Trie Handayani, Trie