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ELPOSYS: Jurnal Sistem Kelistrikan

elposys
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Published by Politeknik Negeri Malang

ISSN : 2407232X EISSN : 24072338 DOI : https://doi.org/10.33795

Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

ELPOSYS adalah jurnal nasional yang menyediakan sumber informasi ilmiah bagi peneliti dan akademisi, lembaga penelitian, lembaga pemerintah, dan industri. Kami menerbitkan research papers, review articles, dan case studies yang berfokus pada bidang ketenagalistrikan serta topik yang terkait. Semua makalah di-review oleh setidaknya dua reviewer. ELPOSYS diterbitkan oleh UPT – P2M Politeknik Negeri Malang dan diterbitkan tiga kali setiap tahun, yaitu Bulan Februari, Juni, dan Oktober. Artikel yang dipublikasikan bidang ilmunya sesuai atau relevan dengan topik-topik Jurnal ELPOSYS yang meliputi bidang (namun tidak terbatas pada): - Pembangkit, - Distribusi dan Transmisi Daya, -Konversi Daya, - Sistem Proteksi, - Transformator, - Teknologi Instalasi Listrik, - Kualitas Daya, - Aplikasi Teknologi Informasi pada Sistem Daya, - Aplikasi Kontrol Cerdas pada Sistem Daya, - Teknologi Pembangkitan berbasis Energi Terbarukan, - Mesin-mesin Listrik, - Pemodelan dan Simulasi Sistem Daya, - Elektronika Daya, - Pengukuran Besaran Listrik, - Kestabilan Sistem Daya, - Topik lain yang terkait.

Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro

Articles 184 Documents

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Alternatif Penanganan Losses Akibat Ketidakseimbangan Beban Pada Trafo Distribusi Anang Dasa Novfowan; Mochammad Mieftah; Wijaya Kusuma
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

The unbalanced load on distribution transformers is mostly caused of connecting new customers and changing patterns of electricity usage in the community. The impact of the unbalanced load is the emergence of a current flowing on the transformer neutral conductor that causes energy losses. Load balancing of distribution transformers is commonly done by technicians, but the implementation takes quite a long time and is repeated, sometimes up to 4-5 times to get the appropriate results. This is more due to less valid customer phase data. Customer phase verification is needed to accelerate the load balancing process in an effort to reduce losses in distribution transformers. With valid customer phase data, just one stage of load balancing can reduce losses by 1.06%..

Implementasi Metode Scoring Matrix dalam Menentukan Indeks Kondisi Minyak Isolasi pada Transformator Daya 150 kV Rahman Azis Prasojo; Liska Safarina; Agung Fiqh Paramonta Islam; Rohmanita Duanaputri; Mochammad Mieftah; Eko Yulianto
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

Transformers are critical equipment in electrical power system which assist in transmitting electrical energy from generators to consumers. Oil insulation is one of the key component in power transformer. Poor quality of oil insulation can be fatal to the transformer, especially when a disturbance occurs. Oil insulation can affect the aging of power transformers and the failure can disturb the continuity of electrical energy supplied to consumers. There are three things that affect the condition of transformer oil insulation, namely chemical, electrical, and physical. The test results of oil insulation parameters that were collected was assessed individually, such as Interfacial Tension (IFT), colour, breakdown voltage (BDV), acidity, and water content. Then, the condition assessment of power transformer oil insulation using a scoring matrix method proposed in CIGRE TB 761 was performed to determine the assessment index of oil insulation conditions of two 150 kV power transformers based on the results of various oil testing. Lastly, recommended action is provided based on the analysis.

Analisis Penstabilan Tegangan Output Generator Induksi 3 Fasa Rachmat Sucipto; Tresna Umar Syamsuri; Epiwardi
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

One of the alternative generators in supplying electrical energy is a 3-phase generator made from a 3-phase slip ring induction motor, after which the rotor winding is supplied with a DC source and rotated using a prime mover. The problem arises because of the large % voltage regulation of a 3-phase generator when it is under load. This is because the induction generator has a relatively larger voltage loss when loaded with a certain load compared to a 3-phase synchronous generator. To overcome these conditions, there are several ways that can be used to stabilize the voltage from the generator, namely: setting the excitation current from the generator, setting the connection on the rotor windings (using 2 windings or using 3 rotor windings) and a combination of the two steps above. . Based on the results of experiments that have been carried out, it is known that the method of stabilizing the output voltage by setting the rotor winding connection is less effective than setting the excitation current because it turns out that the results of changing the output voltage are not too significant compared to changing the generator excitation current. In addition, it is also known that the stabilization of the output voltage from an inductive load will require a DC voltage that is greater than when under a resistive load because of the large difference in losses.

Analisis Load Sharing dan Load Shedding Operasi Paralel Generator Singkron PG Kebun Agung Epiwardi; Rachmat Sucipto; Tresna Umar Syamsuri
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

The Kebon Agung sugar factory has two power supplies, namely from the PLTU Kebon Agung sugar factory itself and from PLN. There are 3 synchronized generators at the Kebun Agung Sugar Factory, with a power of 4.5 MW on generators 1,2 and 1,6 MVA on generator 3. The difference in power between generators 1,2 and 3 causes frequent interference with generator 3 because it has less power. This Final Project analyzes load sharing and load shedding using MATLAB Simulink R2013a. Through these simulations it is shown the division of the load from each generator during normal conditions or when one generator is released. see the effect of the generator that has been set to speed droop when load sharing conditions, the speed of droop is varied so that it knows the characteristics of the generator that has been set speed droop. In the Final Project, the simulation value and calculation of the speed droop setting value in the Kebon Agung sugar factory is ideal. Because ideally the setting of speed droop in the settings so it is not too sensitive and not too long in responding to changes in load that occur in the system.

Kapasitor Shunt Sebagai Korektor Tegangan Bus di Gardu Induk Muhammad Fahmi Hakim; Slamet Nurhadi; Hanifiyah Darna Fidya Amaral; Diktiaz, Aggahra; Amimah, Anggi; Satria Luthfi Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

Segoromadu Substation has two busbars, namely busbar A and busbar B. Busbar A which has nominal voltage of 150 kV has reached a voltage value of 129.38 kV or experienced voltage drop of 13.75%. The percentage of this voltage drop exceeds a predetermined standard. Therefore, it is necessary to design a shunt capacitor which is then modeled and simulated. Based on calculation and analysis result, capacity of shunt capacitor that should be installed on Bus A is 50 MVAR. After the shunt capacitor was installed, based on simulation, there was an increase of 4.87 kV so the voltage afterward became 139.67 kV or only experienced a voltage drop of 3.19%. So, by installing a shunt capacitor with capacity of 50 MVAR, it can increase busbar voltage of the substation. The shunt capacitor also increases the value of reactive power and current flowing to the busbar.

Upaya Peningkatan Keandalan Penyulang dengan Manuver Jaringan Slamet Nurhadi; Muhammad Fahmi Hakim; Ruwah Joto
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

The Tlogosari feeder was disturbed 20 times so that the reliability of system wasn’t said to be good. The purpose of this research was to make efforts to increase reliability and reduce ENS by maneuvering the network and adding CO Branch. Hoped that after these efforts the reliability level of Tlogosari Feeder will be better and ENS will be as minimal as possible. The network maneuver is carried out by delegating part of Tlogosari Feeder load when it experiences a disturbance to the nearest feeders on the condition that the total load current after the maneuver doesn’t exceed the current setting and conductor ampacity. The addition of CO Branch is based on fault data to localize fault points to reduce transformer outages. After performing network maneuvers and adding CO Branch in the sub-networks, it was found that the SAIDI and SAIFI values were improved and the ENS was reduced. Network maneuvering and addition of CO Branch are quite effective in implementing the Tlogosari Feeder.

Analisis Perbaikan Sistem Pentanahan Tower 70 kV pada Transmisi Wlingi - Blitar Budi Eko Prasetyo; Ahmad Hermawan; Safira Azizah
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 3 (2022): ELPOSYS vol.9 no.3 (2022)
Publisher : Politeknik Negeri Malang

High Voltage Air Line (in Indonesian known as SUTT) is defined as part of an electric power transmission network that is likely to be struck by lightning. This condition may lead to back flashover (BFO) phenomenon if the grounding value in the transmission is found to be high (>5 Ohms) and may also generate equipment failure. This research was intended to analyze the grounding improvement in tower T17, so that traveling-wave voltages may not result in failure of the main equipment at the substation, specifically the transformer. The value of the traveling wave at the substation was measured through simulation by means of the ATP Draw application in tower T17 to the substation. The grounding value may be reduced by increasing and widening the distance between the electrodes. The value obtained by modeling 4 electrodes with a distance of 0.5 meter was amounted to 1.73 Ohms. Furthermore, modeling 3 electrodes with a distance of 1 meter had successfully generated a value of 1.06 Ohm, and a value of 1.67 Ohm was also successfully obtained through modeling 2 electrodes with a distance of 2 meters. The ground resistance with a value of 67.05 Ohms that has not been repaired will lead to back flashover (BFO) caused by lightning strikes. However, this may be reduced properly with a lightning arrester which is capable of cutting the overvoltage at the substation, so that the voltage entering the transformer is below the BIL (Basic Insulation Level) value.

Analisa Proteksi Gangguan Petir Pada SUTT 70 KV Antara GI Kebonagung - Polehan Priya Surya Harijanto; Budi Eko Prasetyo
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

In maintaining the continuity of its distribution, routine maintenance and a good security system are needed to anticipate abnormal conditions. This study analyzes lightning disturbances along the 70 kV transmission line from the Kebonagung substation to the Polehan substation with different strike point conditions, as well as studies the condition of the equipment when a direct strike occurs in the 70 kV transmission. From the results of the analysis when a direct strike on the phase wire of 1098 kV goes to the Kebonagung Substation, the arrester will work to throw the overvoltage to the ground, so the lightning voltage that reaches the Kebonagung Substation equipment is less than 60 kV so that the equipment at the Kebonagung Substation is protected from disturbance lightning. However, if the arrester does not work when there is a direct strike, then the damaged equipment is CVT (739.26 kV), Ds Line (545.56 kV) and CT (378.274 kV), because the BIL of the equipment is smaller than the lightning voltage that reaches and causing the system to shut down. When an indirect strike of 97.068 kV goes to the Kebonagung substation, the arrester will work and the equipment at the Kebonagung substation is protected. However, if the arrester does not work, the equipment is still protected because the CVT (65.347 kV), DS Line (16.95 kV) and CT (4.230 kV), the BIL of each equipment is higher than the incoming lightning voltage.

Perancangan Dan Implementasi Half Bridge Dc – Dc Converter Dengan Kendali Arus Hysteresis Masramdhani Saputra; Gian Fikih Yustiawan; Imron Ridzki; Sigit Setya Wiwaha; Binar Surya Gumilang
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

DC-DC Converter is a direct voltage (DC) power supply device that is produced by converting DC input voltage into a lower or higher DC output voltage. In its development, the application of DC-DC Converter allows an electronic device to function with a small energy source, where the output voltage can be varied as needed. DC-DC Converters have been widely developed because they have various advantages, including: simpler form and has high efficiency. In this thesis, an Arduino Mega 2560-based current controller will be implemented. The type of current controller implemented is hysteresis current control with the well-known, tested and proven considerations. Current control works if the inductor current rises from the lower limit of the hysteresis band to the upper limit then the switch will be turned off (inductor current above the upper reference Ip.Ref) and if this current drops from the upper limit to the lower limit the switch will be turned on (current inductor under low frequency Iv.Ref). This current control also has advantages in overcurrent protection such as when there is a short circuit in the load.

Desain Dan Implementasi Transformator Satu-Fasa Dry-Type Dengan Pendekatan Core Geometry Masramdhani Saputra; Imron Ridzki; Asfari Hariz Santoso; Sigit Setya Wiwaha; Erlinda Anindyasani
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

Energy is one of the most important needs for humans to support daily life, especially for developing countries such as Indonesia. One of the energies needed in human life is electrical energy. For this reason, innovation was developed, namely a dry-type Single-Phase Transformer with a core geometry approach developed in the AL 1.01 building of the State Polytechnic of Malang. Calculations performed on the tool are to calculate the value of windings per volt (GPV) and the number of primary and secondary windings. Its manufacture uses a toroid-shaped transformer core. The core specification of the transformer is an outer diameter of 15cm, then an inner diameter of 5.8 cm, and a height of 7cm. The toroid transformer core that will be used is previously isolated from the transformer first to avoid leakage current which can cause heat in the transformer core. The density of the email wire from the transformer winding both from the primary and secondary windings will affect the performance of the transformer, the more tightly the email Wire is wrapped in the transformer core, the vibration generated from the transformer will be smaller, this will affect the voltage losses later in the transformer testing phase carried out using different beaban, each load changes the efficiency of the transformer that has been made will also change, this is because each load tested has different factors.

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Contact Name
Muhammad Fahmi Hakim

Contact Email
fahmi@polinema.ac.id

Phone
+62341-440424

Journal Mail Official
elposys@polinema.ac.id

Editorial Address
UPT-P2M Politeknik Negeri Malang Gedung Graha Polinema Jalan Soekarno - Hatta No. 9 Malang, 65141

Location
Kota malang,

Jawa timur

INDONESIA

Abstract

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Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Muhammad Fahmi Hakim

Contact Email fahmi@polinema.ac.id

Phone +62341-440424

Journal Mail Official elposys@polinema.ac.id

Editorial Address UPT-P2M Politeknik Negeri Malang Gedung Graha Polinema Jalan Soekarno - Hatta No. 9 Malang, 65141

Location Kota malang, Jawa timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Muhammad Fahmi Hakim

Contact Email
fahmi@polinema.ac.id

Phone
+62341-440424

Journal Mail Official
elposys@polinema.ac.id

Editorial Address
UPT-P2M Politeknik Negeri Malang Gedung Graha Polinema Jalan Soekarno - Hatta No. 9 Malang, 65141

Location
Kota malang,

Jawa timur

INDONESIA