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All Journal Jurnal Teknik ITS SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) JAREE (Journal on Advanced Research in Electrical Engineering) Jurnal FORTECH
Margo Pujiantara
Jurusan Teknik Elektro Institut Teknologi Sepuluh Nopember
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Evaluasi Sistem Koordinasi Proteksi Pembangkit Listrik Tenaga Uap ST 2.0 Grati POMU Asadulloh, Latief Ni'am; Pujiantara, Margo; Priyadi, Ardyono
Jurnal Teknik ITS Vol 12, No 3 (2023)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23373539.v12i3.111148

Abstract

Evaluasi sistem proteksi generator merupakan salah satu cara untuk mencegah terjadinya kerusakan pada generator. Penelitian ini membahas topik evaluasi sistem proteksi generator ST 2.0 Grati POMU yang berguna untuk meningkatkan kehandalan sistem proteksi dalam mengamankan generator dari gangguan yang mungkin terjadi. Penelitian ini berfokus pada empat relai yang ada pada generator, antaranya: relai eksitasi lebih (ANSI 24), relai hilang medan (ANSI 40), relai arus lebih dengan kendali tegangan (ANSI 51V), dan relai differensial generator (87G). Evaluasi sistem proteksi generator didasarkan pada standart IEEE dan perhitungan atas setting yang disesuaikan dengan manualbook dari generator ST 2.0 Grati POMU. Aplikasi Etap 12.6 merupakan aplikasi yang digunakan pada penelitian ini untuk melakukan simulasi sistem kelistrikan Grati POMU. Hasil dari Tugas Akhir ini didapatkan bahwa setting pada relai eksitasi lebih (ANSI 24), relai hilang medan (ANSI 40), dan relai arus lebih dengan kendali tegangan (ANSI 51V) perlu dilakukan resetting. Pada relai eksitasi lebih (ANSI 24), Trip stage di resetting dari yang semula 1.4 dengan time delay sebesar 0.8 detik dibuah menjadi 1.2 dengan time delay 2 detik. Pada relai hilang medan (ANSI 40), Kurva CH1 berubah menjadi 0.55 (dalam Q p.u) dengan sudut 77°. Kemudian pada relai 51V nilai Ip (arus pick-up) diubah menjadi 1.1 dari FLA generator dengan voltage restrain sebesar 75 V. Evaluasi sistem proteksi generator dapat menjadi rekomendasi untuk Grati POMU serta berbagai instansi guna mengatur sistem proteksi generatornya.
Optimal Coordination of Directional Overcurrent Relays Using a Modified Grey Wolf Optimization Algorithm Considering Multiple Characteristic Curves Eka Putra, R. Reski; Pujiantara, Margo; Harjian, Muhammad Rivaldi; Winarta, Fadhel Putra; Fahreza, Muhammad
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 22, No 1 (2024): December 2024
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v22i1.33737

Abstract

The effective coordination of directional overcurrent relays (DOCRs) is essential for maintaining the stability and dependability of power systems. This work presents a modified grey wolf optimization (MGWO) approach for addressing the DOCR coordination problem. The MGWO algorithm improves the original grey wolf optimization (GWO) by increasing convergence characteristics and balancing the exploration and exploitation stages. This equilibrium is attained by a dimension learning-hunting method and a quadratic reduction in the control parameter during the optimization phase. DOCR coordination is optimized using the MGWO method, using decision factors such as pickup current, time dial setting, and curve type. The goal is to reduce the total working time of primary relays while maintaining selectivity and shortening the discrimination time between primary and backup relays. The suggested MGWO technique is evaluated on the IEEE 8 bus system with two scenarios and compared to other optimization approaches. The results reveal that MGWO outperforms previous algorithms, achieving improvements in the objective function ranging from 5.52% to 58.19%. Additionally, the DOCR settings created by MGWO are evaluated using ETAP software to assure compliance with operational requirements and prevent violations of DOCR coordination.Keywords: Directional Overcurrent Relay Coordination, Grey Wolf Optimization, Multiple Curves, Pickup Current, Time Dial Setting.
Parallel Hybrid Particle Swarm-Grey Wolf Algorithms for Optimal Load-Shedding in An Isolated Network Sujono; Priyadi, Ardyono; Pujiantara, Margo; Purnomo, Mauridhi Hery
Jurnal Nasional Pendidikan Teknik Informatika : JANAPATI Vol. 13 No. 1 (2024)
Publisher : Prodi Pendidikan Teknik Informatika Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/janapati.v13i1.76093

Abstract

In distribution networks integrated with distributed generation (DG), disconnection from the main grid reduces the power supply significantly. The power imbalance between DG generation and load degrades network stability. This paper proposes a hybrid parallel Particle Swarm Optimization - Grey Wolf Optimizer (PSGWO) algorithm for load shedding optimization. This optimization aims to reduce the DG power not absorbed by the remaining loads and maintain the voltage within the specified limits. The performance of PSGWO is tested on an IEEE 33 bus radial distribution system, considering loading levels of 80% to 140% of the baseload. At a 100% loading level, PSGWO showed the best performance, with a load shedding of 2.2297 MW and a voltage deviation of 0.0049. These values are the smallest compared to the results of the standard PSO and GWO algorithms. The PSGWO algorithm remains superior and converges faster than standard PSO and GWO at all loading levels.
Optimization Protection Coordination by Optimizing Time Dial Settings at PT. Pupuk Sriwidjaja Palembang Using Grey Wolf Method Januarestu, Achmad Jawahir; Pujiantara, Margo; Priyadi, Ardyono; Jaelani Putra, Riko Satrya Fajar
JAREE (Journal on Advanced Research in Electrical Engineering) Vol 9, No 1 (2025): January
Publisher : Department of Electrical Engineering ITS and FORTEI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jaree.v9i1.430

Abstract

Overcurrent Rele (OCR) is an important component in the electric power protection system. One of the parameters that must be set on the OCR is the Pickup Current (Ip) and Time Dial Setting (TDS). To achieve optimum relay coordination by setting the time dial, several optimisation methods have been used such as Genetic Algorithm (GA), Particle Swarm Optimisation (PSO), Fire Fly Algorithm (FA) and Grasshopper Optimisation Algorithm (GOA).In this study, the TDS setting was determined through Using the Grey Wolf Optimisation (GWO) method. The GWO algorithm was able to determine the optimum value of the TDS setting for each OCR process. This is validated by the results of tests conducted using the ETAP application. The primary and secondary relays are able to coordinate effectively to secure three-phase faults that occur on each bus.Furthermore, GWO demonstrated a superior convergence rate in compared to GOA, therefore enhancing its capacity to identify a more optimal TDS setting value. Furthermore, the objective function of GWO is more effective than that of GOA, thereby enhancing its ability to function in a more optimal manner. The results of this test demonstrate that the GWO algorithm is a reliable method for directly identifying the optimal TDS setting value for determining relay coordination settings.Keywords—Protection Coordination Overcurrent Rele ( OCR ), Short Circuit Maximum ( IscMax ), Time Dial Setting ( TDS ), Grey Wolf Optimization ( GWO ).
Perhitungan TDS Overcurrent Relay Menggunakan Adaptive Modified Firefly Algorithm Pujiantara, Margo; Muhammad, Rahmanditya; Soedibyo, Soedibyo
Jurnal FORTECH Vol. 1 No. 1 (2020): Jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/fortech.v1i1.223

Abstract

Permanent Magnet Synchronous Machines (PMSM) have low torque in a number of specific PT. Pertamina RU V Balikpapan will be integrated with electricity sources with PT. PLN. Then there will be a change in the generator operating pattern on the system so it needs to be analyzed again. The protection system aims to isolate the interference quickly, selectively, and coordinatively so that damage to the system can be minimized and the continuity of electric power can be maintained properly. The important thing that must be considered for protection coordination, especially in overcurrent relays, is filling the TDS (Time Dial Setting) parameter. TDS regulates the relay operation time in securing a disturbance. Generally, the TDS value is determined using a manual calculation to obtain a minimum TDS value. However, to get the right TDS value in coordinating with other relays it still uses trial and error methods. In this final project, we will discuss how to calculate the time dial overcurrent relay inverse setting with the adaptive modified firefly algorithm method in the electrical system at PT. Pertamina RU V Balikpapan considers integration with PLN to obtain a minimum TDS value. The result of this final project is to obtain a minimum TDS value in some cases typical types such as the longest channel, consideration of LVCB operating time, and short channels so that it can be well-coordinated with the long lines installed on the same bus.
Perbaikan CCT Pada Multi Machine Infinite Bus Dengan Supercapacitor Energy Storage Menggunakan Critical Trajectory Puspita Sari, Talitha; Aqsa Izza Mahendra, Rafin; Priyadi, Ardyono; Lystianingrum, Vita; Pujiantara, Margo; Anam, Sjamsjul
Jurnal FORTECH Vol. 1 No. 2 (2020): jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/fortech.v1i2.225

Abstract

Transient stability is an important aspect in maintaining the continuity and reliability of the electrical power system when a sudden large disturbance occurs. However, there is a time operation's limitation of the protection system to eliminate disturbance before the system becomes unstable and loses its synchronization. Critical Clearing Time (CCT) is the toleration time to eliminate the fault to keep the system stable. To improve system stability, installing Supercapacitor Energy Storage (SCES) can be one of the methods for extending the CCT values. SCES absorb large amounts of electricity simultaneously when a fault occurs. This paper proposed a determination of SCES' controller effect in extending the CCT. SCES becomes a dummy load and extends the CCT value depending on the controller's ability to respond to a fault. Controller modeling is applied to SCES, which is installed at the bus generator with determined capacity. The modified Fouad and Anderson 9-bus 3-machine system with a single machine to an infinite bus is used to validate the proposed method. Moreover, the critical trajectory method, which is known as a faster calculation and better accuracy than the time domain simulation method, is used to obtain the CCT value. The result shows that the faster controllers work against fault, the higher the CCT value improvement of system CCT. The highest improvement occurs when the controller works at 0.001s.
Efek Penambahan SCES Pada Sistem Multimesin dengan Damping dan Kontroler Berdasarkan Metode Critical Trajectory Priyadi, Ardyono; Iyyaya Fariha, Nazila; Puspita Sari, Talitha; Lystianingrum, Vita; Pujiantara, Margo; Anam, Sjamsjul
Jurnal FORTECH Vol. 1 No. 2 (2020): jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/fortech.v1i2.228

Abstract

The system can maintain its synchronization under a transient condition. The transient stability system can be evaluated using the critical trajectory method by calculating the Critical Clearing Time (CCT). The advantage of using a critical trajectory method is that the CCT can be found directly and more accurate than the time domain simulation method. This paper proposed the addition of Supercapacitor Energy Storage (SCES) and damping to enhance the transient stability on multi machine system. SCES is an electrical energy storage device that quickly stores and supplies large amounts of electricity, while damper winding damp the oscillations during unstable steady state conditions. Within the addition of SCES and damping in the system, the stability will last longer than before. The stability system is seen by the extended CCT. Furthermore, multi-machine to infinite bus used to validate the proposed method. The test system also includes the Automatic Voltage Regulator (AVR) and the governor
Setting Differential Relay Transformer (87T) dengan Pertimbangan Vector Group pada PLTU Tenayan 2x110 MW Pujiantara, Margo; Rizki Firdausi, Teuku; Raki Mahindara, Vincentius; Lystianingrum, Vita
Jurnal FORTECH Vol. 2 No. 1 (2021): Jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/fortech.v2i1.237

Abstract

PT. Pembangkitan Jawa Bali (PJB) Unit Bisnis Jasa Operasi dan Pemeliharaan (UBJOM) PLTU Tenayan has protection equipment that serves as a support for power generation activities. One of the main protections used on PLTU Tenayan is differential relay transformer (87T). This Differential relay serves to protect main transformers from interference and work quickly and selectively in breaking interruptions. In electrical systems PLTU Tenayan, the main transformer and transformer UAT have a vector group configuration, thus causing the current flowing on both sides of the transformer will be different, and the current perceived by CT on both sides of the transformer will be different, so that the relay operates without any interference. On 9 December 2018, there was a trip on the generator Unit 1 PLTU Tenayan, causing blackout. This incident was allegedly due to lightning strikes on the transmission side of 150 kV. In this research will be conducted analysis of differential relay transformer (87T) with the consideration of vector group on PLTU Tenayan 2x110 MW. Research method with simulation using ETAP software 12.6.0. The results of the analysis of the simulations and calculations in the value of Idiff 1.5 Ie and slope of 120%, this value will be used for the setting differential relay transformer. From the test results obtained that differential relay transformer only works when internal disruption only and does not operate when external interference. So differential relay transformer (87T) safe from fault trip and operation fault.
Co-Authors Aqsa Izza Mahendra, Rafin Ardyono Priyadi Asadulloh, Latief Ni'am Eka Putra, R. Reski Fahreza, Muhammad Harjian, Muhammad Rivaldi Iyyaya Fariha, Nazila Jaelani Putra, Riko Satrya Fajar Januarestu, Achmad Jawahir Lystianingrum, Vita Mauridhi Hery Purnomo Muhammad, Rahmanditya Puspita Sari, Talitha Raki Mahindara, Vincentius Rizki Firdausi, Teuku Sjamsjul Anam Soedibyo Soedibyo Sujono Winarta, Fadhel Putra