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Optimal Placement and Sizing of TCSC using Gravitational Search Algorithm Purwoharjono, Purwoharjono; Abdillah, Muhammad; Penangsang, Ontoseno; Soeprijanto, Adi
TELKOMNIKA Telecommunication, Computing, Electronics and Control Vol 10, No 4: December 2012
Publisher : Universitas Ahmad Dahlan

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Abstract

This paper represents the GSA that can be used to determine the optimal location and rating of FACTS devices. They are devices used to regulate and improve the power flow in the power system. The method used in this study was GSA. FACTS types used were TCSC implemented on 500kV Java-Bali Power System. Load flow results before optimization showed that the active power loss was 297.607MW. While the load flow results after optimization using GSA with 5-TCSC obtained were 287.926MW of active power loss, with 10-TCSC, it was obtained 281.143MW of active power loss. In addition, using 15-TCSC, the active power loss obtained was 279.405MW. GSA methods can be used to minimize power losses and transmission lines as well as to improve the value of the voltage in the range of 0.95+ 1.05pu compared with load flow results before optimization.
Steady-State Stability Assessment Using Neural Network Based on Network Equivalent Chaerah Gunadin, Indar; Abdillah, Muhammad; Soeprijanto, Adi; Penangsang, Ontoseno
TELKOMNIKA Telecommunication, Computing, Electronics and Control Vol 9, No 3: December 2011
Publisher : Universitas Ahmad Dahlan

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Abstract

Power systems in all over the world have increased in size and complexity due to rapid growth of widespread interconnection. This situation will make power system operated closer to steady-state stability limit (SSSL) resulting in higher probability voltage instability or voltage collapse. This paper presents SSSL assessment in power system using Artificial Neural Network (ANN) model based on REI-Dimo method. The equivalent REI-Dimo is used to determine SSSL index of the power systems. Then, the result of REI-Dimo will be taught on ANN method via online. Studies were carried out on a Java-Bali 500kV system. The simulation showed that the proposed method could accurately predict the proximity to SSSL in power system. The method was computationally efficient and suitable for online monitoring of steady-state stability condition in the power systems.
MATLAB/SIMULINK SIMULATION OF UNIFIED POWER QUALITY CONDITIONER-BATTERY ENERGY STORAGE SYSTEM SUPPLIED BY PV-WIND HYBRID USING FUZZY LOGIC CONTROLLER Amirullah, Amirullah; Penangsang, Ontoseno; Soeprijanto, Adi
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 3: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1399.113 KB) | DOI: 10.11591/ijece.v9i3.pp1479-1495

Abstract

This paper presents performance analysis of Unified Power Quality Conditioner-Battery Energy Storage (UPQC-BES) system supplied by Photovoltaic (PV)-Wind Hybrid connected to three phase three wire (3P3W) of 380 volt (L-L) and 50 hertz distribution system. The performance of supply system is compared with two renewable energy (RE) sources i.e. PV and Wind, respectively. Fuzzy Logic Controller (FLC) is implemented to maintain DC voltage across the capacitor under disturbance scenarios of source and load as well as to compare the results with Proportional Intergral (PI) controller. There are six scenarios of disturbance i.e. (1) non-linear load (NL), (2) unbalance and nonlinear load (Unba-NL), (3) distortion supply and non-linear load (Dis-NL), (4) sag and non-linear load (Sag-NL), (5) swell and non-linear load (Swell-NL), and (6) interruption and non-linear load (Inter-NL). In disturbance scenario 1 to 5, implementation of FLC on UPQC-BES system supplied by three RE sources is able to obtain average THD of load voltage/source current slightly better than PI. Furthermore under scenario 6, FLC applied on UPQC-BES system supplied by three RE sources gives significantly better result of average THD of load voltage/source current than PI. This research is simulated using Matlab/Simulink.
AN OPTIMISATION APPROACH TOWARD ONBOARD ENERGY MANAGEMENT SYSTEMS: MODELLING AND SIMULATION OF SUPPLY SIDE Suroso, Hadi; Penangsang, Ontoseno
Jurnal Teknik Industri Vol 11, No 1 (2010): Februari
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1785.321 KB) | DOI: 10.22219/JTIUMM.Vol11.No1.1-5

Abstract

Optimization in the operation of electric power system is an important task for both in land and onboard. The objective is to minimize operating cost index. Taking advantage of the scheme that onboard operator has the authority not only in the supply side but also in the demand side, an optimization approach toward onboard energy management systems based on integrated model for supply and demand side is being developed. The model utilizes unit commitment and economic dispatch in the supply side and load management based on multiple attribute decision-making in the demand side. As a part of the whole concept, this paper focuses on the modeling and simulation of demand side. A user friendly demand side model consisting of Unit Commitment and Economic Dispatch is developed by using LabVIEW, Laboratory Virtual Instrument Engineering Workbench. Data taken from 3 units of Steam Power Plant are simulated. It is then eventually confirmed that 9% total cost saving can be achieved in the selected load demand range
Aplikasi Pendekatan Aliran Daya untuk Estimasi Rugi-Rugi Energi Sistem Distribusi Radial 20 kV Rohi, Daniel; Arauna, Radita Sonixtus; Penangsang, Ontoseno
Jurnal EECCIS Vol 2, No 1 (2008)
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Brawijaya

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Abstract

Salah satu faktor yang bisa digunakan untuk menentukan efisiensi pengelolaan energi litrik adalah jumlah rugi-rugi energi yang terjadi pada sistem. Salah satu pendekatan dalam menentukan rugi -rugi energi adalah dengan menggunakan pendekatan aliran daya yang dikerjakan dengan program komputer yakni ETAP PowerStation. Untuk mendapatkan hasil yang cepat dan akurat dapat menggunakan dua metode perhitungan yang berbeda, yakni metode Energy Load Flow dan metode Loss Factor. Pengambilan data berupa data penggunaaan energi atau kurva beban untuk menentukan karakteristik beban, yakni perubahan beban pada sistem berdasarkan pada fungsi waktu, yang selanjutnya digunakan dalam pemodelan beban pada simulasi aliran daya yang diproses dengan perangkat lunak ETAP PowerStation. Berdasarkan hasil analisa, dengan menggunakan metode Energy Load Flow, didapat rugi-rugi energi yang terjadi pada jaringan tegangan menengah adalah sebesar 0.92% dan 1.32% pada trafo distribusi. Sedangkan dengan menggunakan metode Loss Factor, didapatkan rugi-rugi energi pada jaringan tegangan menengah sebesar 0.85 % dan 1.29 % pada trafo distribusi.Kata kunci : Rugi-rugi Energi, Sistem Distribusi, Aliran Daya
Distorsi Harmonisa Pada Pelanggan Domestik Dengan Daya 250 VA ≤ daya ≤ 2200 VA Rohi, Daniel; Utomo, Dion Dwipayana; Penangsang, Ontoseno
Jurnal EECCIS Vol 3, No 1 (2009)
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Brawijaya

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Abstract

Makalah ini memaparkan pengaruh penggunaan beban tidak linear terhadap timbulnya distorsi harmonisa khususnya pada pelanggan yang menggunakan daya rendah atau R-1 dengan kapasitas daya 250 VA ≤ daya ≤ 2200 VA. Dengan mengambil 5 rumah sebagai sampel utuk mengidentifikasi beban yang digunakan, dan melakukan pengukuran untuk mendeteksi didtorsi harmonisa. Data yang diperoleh akan digunakan dalam pemodelan dan prediksi tingkat distorsi harmonisa.Pengukuran dilakukan pada beban tidak linier dan kwh-meter di tiap rumah menggunakan Fluke 41 B. Hasil pengukuran kwh-meter untuk mendapatkan analisa tentang VTHD, ITHD, faktor daya dan frekuensi. Hasil pengukuran dan perhitungan menunjukan perbedaan yang kecil artinya metode dan proses yang digunakan sudah tepat. Selain itu, VTHD berkisar 1,3% - 4,8% atau rata-rata 2.86%., berarti distorsi haromonisa masih dibawah standar yang ditetapkan yakni 5%, begitu juga dengan ITHD diperoleh rata-rata 13.7% berati masih dibawah standar yakni 15%.Pelanggan dengan kapasitas daya rendah tidak memicu distorsi harmonisa. Besarnya harmonisa berbading lurus dengan peningkatan penggunaan peralatan elektronik tidak linier.Kata kunci : Beban Tidak linier, Harmonisa, Total Distorsi
ANALISIS KEANDALAN PROTEKSI SALURAN TRANSMISI PT. CHEVRON PACIFIC INDONESIA MENGUNAKAN METODE FAULT TREE Setiawan, David; Hernanda, Ign Satriyadi; Penangsang, Ontoseno
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2007
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Abstract

Keandalan dan keselamatan adalah dua hal yang tidak dapat dipisahkan. Keselamatan dapatdigambarkan sebagai langkah penghindaran dari kondisi-kondisi yang dapat menyebabkan kerugian, kematian,atau kerusakan berat pada peralatan atau bahkan lingkungan sekitarnya. Oleh karena itu kita perlumenciptakan keselamatan dari kesalahan dan kegagalan yang mungkin terjadi serta mengambil langkahkorektif.Analisis Fault Tree adalah analisis untuk menentukan kegagalan disain dan untuk menentukankemungkinan terjadinya kegagalan sehingga tindakan korektif dapat dilakukan. Untuk mengoptimalkan analisisFault Tree ini, penulis memanfaatkan teknik Heuristik (GA) untuk menentukan kesalahan atau kegagalan yangpaling memungkinkan terjadi.Kata kunci: Reliability, Analisis Fault Tree, Proteksi Transmisi, Heuristik Algoritma Genetika (HGA)
APLIKASI METODE GRADIEN DAYA REAKTIF DALAM PEMISAHAN KONTRIBUSI HARMONISA KONSUMEN DAN UTILITAS PADA POINT OF COMMON COUPLING (PCC) Setiadji, Julius Setiadji; Penangsang, Ontoseno; Rahmawatie, Henie Arief
Jurnal Teknik Elektro Vol 8, No 1 (2008): MARET 2008
Publisher : Institute of Research and Community Outreach

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.738 KB) | DOI: 10.9744/jte.8.1.52-56

Abstract

Harmonic disturbance is a phenomenon in AC power system. In the beginning, harmonic was caused by saturated iron in transformer and electrical machine. But along expanding modern technology which marked with usage of component of semiconductor, harmonic problems also progressively increase. Harmonic source can be come from utility and customer sides, so that it is required to analyze the separation of harmonic contributions between utility and customer at the point of common coupling (PCC). Analysis result of the reactive power changes against time (?Q/?t) shows that the graphic tends to increase and by manual analysis, the result of ?Q/?t is 0.04, so it can be concluded that utility has the biggest harmonic contribution on PCC. Abstract in Bahasa Indonesia: Gangguan harmonisa merupakan suatu fenomena di sistem daya AC. Pada mulanya penyebab harmonisa adalah ketika inti besi trafo dan mesin listrik mengalami kondisi saturasi, tetapi seiring berkembangnya teknologi modern yang ditandai dengan penggunaan komponen semikonduktor, masalah harmonisa juga semakin meningkat. Sumber harmonisa dapat berasal dari utilitas maupun konsumen, sehingga perlu dilakukan analisa pemisahan kontribusi harmonisa antara utilitas dan konsumen di PCC. Dari hasil analisa melalui grafik perubahan daya reaktif terhadap waktu (?Q/?t) menunjukkan bahwa grafik cenderung naik selain itu dengan analisa ?Q/?t diperoleh angka 0,04 (?Q/?t >0) sehingga dapat disimpulkan bahwa utilitaslah yang mempunyai kontribusi harmonisa terbesar di PCC. Kata kunci: harmonisa, PCC
OPTIMAL PLACEMENT AND SIZING OF TCSC USING GRAVITATIONAL SEARCH ALGORITHM Purwoharjono, Purwoharjono; Abdillah, Muhammad; Penangsang, Ontoseno; Soeprijanto, Adi
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 5: September 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper represents the GSA that can be used to determine the optimal location and rating of FACTS devices. They are devices used to regulate and improve the power flow in the power system. The method used in this study was GSA. FACTS types used were TCSC implemented on 500kV Java-Bali Power System. Load flow results before optimization showed that the active power loss was 297.607MW. While the load flow results after optimization using GSA with 5-TCSC obtained were 287.926MW of active power loss, with 10-TCSC, it was obtained 281.143MW of active power loss. In addition, using 15-TCSC, the active power loss obtained was 279.405MW. GSA methods can be used to minimize power losses and transmission lines as well as to improve the value of the voltage in the range of 0.95+ 1.05pu compared with load flow results before optimization. DOI: http://dx.doi.org/10.11591/telkomnika.v10i5.1183
POWER-FLOW DEVELOPMENT BASED ON THE MODIFIED BACKWARD-FORWARD FOR VOLTAGE PROFILE IMPROVEMENT OF DISTRIBUTION SYSTEM Suyanto, Suyanto; Rahmadhani, Citra; Penangsang, Ontoseno; Soeprijanto, Adi
International Journal of Electrical and Computer Engineering (IJECE) Vol 6, No 5: October 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (447.169 KB) | DOI: 10.11591/ijece.v6i5.pp2005-2014

Abstract

Unbalanced three-phase radial distribution system has a complex problem in power system. It has many branches and it is sometimes voltage profile?s not stable at every end branches. For improvement of voltage profile, it can be performed by penetrating of a distributed generation models. Information of voltage profile can be gained by study of power flow.  The Modified Backward-Forward is one of the most widely used methods of development of power flow and has been extensively used for voltage profile analysis. In this paper, a study of power flow based on the Modified Backward-Forward method was used to capture the complexities of unbalanced three phase radial distribution system in the 20 kV distribution network in North Surabaya city, East Java, Indonesia within considering distributed generation models. In summary, for the informants in this study, the Modified Backward-Forward method has had quickly convergence and it?s just needed 3 to 5 iteration of power flow simulation which?s compared to other power flow development methods. Distributed Generation models in the modified the modified 34 BUS IEEE system and 20 kV distribution network has gained voltage profile value on limited range. One of the more significant findings to emerge from this development is that the Modified Backward-Forward method has average of error voltage about 0.0017 % to 0.1749%.