Article Per Year (5 Year)
p-Index From 2021 - 2026
3.265
P-Index
This Author published in this journals
All Journal REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal ELTEK ELPOSYS: Jurnal Sistem Kelistrikan Jurnal Teknik Ilmu dan Aplikasi Jurnal Ekonomi, Bisnis, dan Akuntansi Jurnal Pengabdian Kepada Masyarakat
Sungkowo, Heri
Jurusan Teknik Elektro, Politeknik Negeri Malang
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Other

Published : 21 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 21 Documents
Search

 1   2   3 
ANALISIS KINERJA GENERATOR INDUKSI 3 FASA BERDASARKAN REGULASI TEGANGANNYA Rachmat Sutjipto; Heri Sungkowo; Epiwardi
Jurnal Teknik Ilmu dan Aplikasi Vol. 3 No. 2 (2022): Jurnal Teknik Ilmu dan Aplikasi
Publisher : Politeknik Negeri Malang

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

Abstract

Generator induksi 3 fasa bisa digunakan sebagai generator cadangan dari operasi generator sinkron 3 fasa. Generator induksi 3 fasa dapat dibuat dari motor induksi slip ring 3 fasa atau motor sangkar 3 fasa untuk generator induksi SEIG (Self Excited Induction Generator). Motor induksi slip ring 3 fasa berfungsi sebagai generator induksi setelah belitan rotornya disuplai sumber DC dan diputar menggunakan prime mover, sedangkan pada generator SEIG, tegangan listrik dihasilkan dengan bantuan 3 kapasitor yang terhubung delta. Permasalahan yang muncul dalam pengoperasian adalah timbulnya rugi tegangan saat dilaksanakan variasi pembebanan. Untuk menjawab permasalahan tersebut maka diadakan 3 jenis pengetesan (DC Test, Open Circuit Test dan Load Test) pada kedua generator tesebut. Setelah semua percobaan dilaksanakan dan dianalisa maka diketahui bahwa besarnya tegangan output dari generator induksi 3 fasa dipengaruhi oleh besarnya kecepatan generator dan besarnya arus eksitasi. Proses eksitasi dari kedua generator tersebut berbeda, eksitasi dari generator SEIG ditentukan besar dan jenis hubungan kapasitor eksitasi sedangkan generator induksi lainnya ditentukan oleh besarnya tegangan DC yang disuplaikan ke belitan rotor. Tegangan output dari kedua generator induksi juga dipengaruhi oleh besar dan jenis bebannya. Diketahui pula bahwa generator induksi SEIG mempunyai rugi tegangan dan regulasi tegangan yang lebih besar dikarenakan harga parameter belitannya lebih besar. Untuk menstabilkan tegangan output generator maka dapat dilaksanakan dengan mengatur besarnya arus eksitasi dan kecepatan dari kedua generator induksi tersebut, dengan tetap memperhatikan kemampuan belitan eksitasi dan frekuensi yang dibutuhkan oleh beban serta kesediaan kapasitor untuk generator SEIG.
Analisis Koordinasi Relai Proteksi Transformator I 150/20kV GI Bumicokro Akibat Uprating Daya 50MVA Menjadi 60MVA Anang Dasa Novfowan; Mochammad Mieftah; Heri Sungkowo
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 2 (2023): ELPOSYS vol. 10 no. 2 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v10i2.2521

Abstract

Nowadays, Electricity is a important thing for people. As the load grown at the Bumicokro Substation, transformer I had replaced from 50 MVA to 60MVA. Because of that, the relays protection had to be resetting because of the changes of nominal current. Therefore, the objectives of this research are calculated and simulated the setting of OCR (Over Current Relay), GFR (Ground Fault Relay), SBEF (Stand by Earth Fault), differential and REF (Resistance Earth Fault) relay. ETAPv12.6 software is used to get the relay coordination Outgoing 22kV, Incoming 150kV, OCR (Over Current Relay), GFR (Ground Fault Relay), SBEF (Stand by Earth Fault), differential and REF (Resistance Earth Fault) after the calculation and simulation finished, then the result indicated the appropriate conditions to overcome the distrubance at the transformer according to the protection zone. The result of current setting for Differential relay is 2,88A, Primary REF is 0,5A, Secondary REF is 1,1A, 150kV OCR is 3,5A, and the moment setting is 28A, 22kV OCR 150kV 4,7A, GFR 1,44A, SBEF 1,0A. While, the result of time setting for Differential relay, Primary REF, Secondary REF are instant, for 150kV OCR is 1,06s, 22kV OCR is 1,07s, GFR 1,51s, and SBEF 8,8s.
Rancang Bangun Mesin Sangrai Sampel Biji Kopi Elektrik Kapasitas 250 Gram Heri Sungkowo; Rahman Azis Prasojo; Dinda Ayu Amalia; Rahmad Dwi Pramudya; Muhammad Fahmi Hakim; Bakti Indra Kurniawan; Sukamdi
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 3 (2023): ELPOSYS vol. 10 no. 3 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v10i3.3942

Abstract

Coffee is one of the beverages with a distinct flavor profile. Coffee production continues to grow in response to community demands. A wide variety of coffee flavors have been developed, necessitating an effective coffee processing method, such as roasting. While many coffee production processes employ roasting machines with high capacities, smaller industries may incur losses when using such machines due to their production needs, which involve creating new coffee flavor samples. To address these challenges, a solution is proposed: the creation of a drum-based coffee bean sample roasting machine that utilizes the convection method. The machine manufacturing process involves calculating the drum capacity, heater specifications, motor rotation, and air flow. A 2000 Watt heater is chosen, accompanied by a maximum drum capacity of 250 grams. The driving motor is a 12 V DC motor. The combined power of the motor components totals 1520 Watts, and the overall heating capacity can achieve temperatures of up to 300ºC. Performance testing of the roasting machine is conducted under conditions where all components are functioning correctly. The final roasting results exhibit even distribution, with a preheating temperature range of 190-200ºC for approximately 15 minutes roasting time.
Analisis Penggunaan Transformator Sisipan Untuk Mengatasi Rugi Tegangan dan Pembebanan Lebih Rachmat Sutjipto; Heri Sungkowo; Epiwardi; Dhimas Dhesah Kharisma
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 3 (2023): ELPOSYS vol. 10 no. 3 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v10i3.4223

Abstract

On the JD267 distribution transformer with a capacity of 100 kVA at the Kalibaru feeder on the PT PLN (Persero) ULP Genteng experienced overloading at WBP (88.03%) and high voltage losses. The magnitude of the load exceeds 80% of the standard transformer capacity and is in the bad category (load >= 80%) according to Table I. SE No. 0017.E/DIR/2014, related to transformer loading percentage. Meanwhile, the voltage loss of the JD267 transformer when the WBP is in Phase R is 19.05%, Phase S is 17.08%, and Phase T is 18.33%. This exceeds the voltage tolerance limit in SPLN 1:1995 that the voltage is not allowed to exceed +5% and -10% of the PLN standard voltage, namely 220 V. To handle this problem, PT. PLN (Persero) ULP Genteng carried out the installation of insert transformers by estimating load growth in the next 5 years using the Least Square method. After the addition of the insert transformer, the loading on the JD267 distribution transformer fell to 58.93% on WBP. Meanwhile, the magnitude of the JD267 transformer voltage loss when the WBP after insertion in the R Phase decreases to 0.84%, the S Phase is 1.04%, and the T Phase is 1.63%, and when the LWBP after insertion in the R Phase decreases to 0 .76%, S Phase 0.30%, and T Phase 0.6%. Based on the data above, adding an insert transformer can improve the loading percentage on the transformer and reduce voltage losses that occur at the end voltage of the transformer.
Peningkatan Keandalan Berbasis Nilai Energy Not Supplied (ENS) Pada Penyulang Banyu Biru Slamet Nurhadi; Mochammad Mieftah; Heri Sungkowo; Sukamdi
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5157

Abstract

The reliability of the Banyu Biru feeder at PT. PLN (Persero) ULP Gondang Wetan is critical due to frequent disturbances causing significant energy losses and impacting SAIDI and SAIFI metrics. This study aims to enhance reliability by reducing ENS (Energy Not Served) values through strategic solutions. Data from March to August 2022 revealed 27 disturbances, comprising 6 permanent and 21 temporary interruptions. Initial calculations showed an ENS value of 20,509.84 kWh, a SAIDI of 0.24 hours/customer, and a SAIFI of 0.64 times/customer. The study proposed two scenarios: relocating the LBSM and adding 5 FCOs, and additionally installing a recloser in the second scenario. Post-implementation, ENS values decreased to 7,489.31 kWh, with SAIDI and SAIFI values improving to 0.08 hours/customer and 0.13 times/customer, respectively. These results highlight significant reductions in energy losses and improvements in network reliability, aligning with SPLN 68-2: 1986 standards. This research provides actionable insights for PT. PLN to enhance distribution network reliability and customer satisfaction.
Implementation of Insect Pest Control Innovation with Raindrop Sensor using Solar Energy Source in Shallots Farming Prasojo, Rahman Azis; Fahad, Waris Malik; Nadila, Dilavinsa Indar Putri; Duanaputri, Rohmanita; Hakim, Muhammad Fahmi; Sungkowo, Heri; Handani, Galuh Prawestri Citra
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 5, No 3 (2024): REKA ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v5i3.209-218

Abstract

Spodoptera exigua, commonly known as the beet armyworm, is a major pest affecting shallot (Allium ascalonicum L.) plants, leading to significant damage and economic losses for farmers. Traditional pest control methods, such as manual caterpillar removal and pesticide application, have proven ineffective and costly. In response, this study aims to develop an environmentally friendly and sustainable solution by designing a pest control system powered by solar energy, equipped with high-voltage wires, UV lamps, and a raindrop sensor for automatic operation. The system works by converting solar energy into electrical power, which then supplies the pest control unit. The UV lamps attract moths, while the high-voltage wire eliminates them. A raindrop sensor is used to ensure the system operates efficiently by shutting off during rainfall. The method involved discussions with local farmers, design and assembly of the device, followed by field implementation and monitoring in shallot farms. The results show that the device successfully trapped between 40 to 80 moths per day, significantly reducing pest populations and lowering production costs for farmers, as the use of chemical pesticides was minimized. Additionally, the quality of shallot crops improved, leading to higher market value. The solar-powered pest control system is an effective, eco-friendly alternative for managing pest infestations in shallot farming. It offers a cost-efficient solution, reducing the need for pesticides while improving crop quality and yield.
Rancang Bangun Miniatur Plant Pusat Simulator Pompa Air Kotor Menggunakan Panel Kontrol Relay Kontaktor Susilo; Sukamdi; Agus Andrianto; Heri Sungkowo; Dimas Eriyanto; Milzam Brillian Santana
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6252

Abstract

Water pumps play an important role in the management of wastewater, particularly in maintaining environmental cleanliness and health. This research aims to design and create a miniature plant simulator for wastewater pumps using a relay contactor control panel. This miniature plant is designed to simulate the operation of the wastewater pump system automatically, replacing the often inefficient manual methods. The research process begins by determining the main components needed, such as a three-phase induction motor, contactors, thermal overload relays, and related sensors. Subsequently, the design and construction of the simulator and its control panel are carried out. Implementation includes testing the functionality of each component and the integrity of the overall system, including individual component testing and testing under system failure conditions. The research results show that the miniature plant simulator built functions well as expected. The automatic control system using relay contactors has proven effective in operating the water pump efficiently and safely. This miniature plant can be used not only as a learning tool but also as a prototype for developing larger and more complex wastewater pump control systems
Pelatihan Bagi Siswa SMK Jurusan Teknik Listrik Dalam Menghadapi Lomba Kompetensi Siswa (LKS) Di Balai RW. 02 Desa Mulyoagung Kabupaten Malang Mieftah, Mochammad; Dhesah Kharisma, Dhimas; Prasojo, Rahman Azis; Epiwardi , Epiwardi; Novfowan, Anang Dasa; Sungkowo, Heri
Jurnal Pengabdian kepada Masyarakat Vol. 11 No. 2 (2024): JURNAL PENGABDIAN KEPADA MASYARAKAT 2024
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/abdimas.v11i2.4567

Abstract

Setiap tahun, Pemerintah Kota/Kabupaten selalu menyelenggarakan Lomba Kompetensi Siswa (LKS) di bidang teknik listrik antar SMK (Sekolah Menengah Kejuruan) tingkat kota/kabupaten. Kenyataan di lapangan, proses menyerap ilmu dan berlatih dari sekolahan masih kurang maksimal karena terbatasnya waktu. Pelatihan atau pembekalan bagi siswa SMK jurusan teknik listrik, diharapkan dapat memberikan arahan dan kisi-kisi tentang Lomba Kompetensi Siswa (LKS) bidang teknik listrik agar para siswa lebih mantap, percaya diri dengan adanya skill tambahan yang di berikan. Selain itu, dampak dari pembekalan ini adalah agar siswa mendapatkan nilai maksimal dan bisa menjadi pemenang dari lomba LKS ini. Dari pelatihan atau pembekalan tersebut didapatkan hasil yang memuaskan, siswa dapat merakit dengan cepat, benar dan rapi. Siswa juga dapat menjelaskan secara detail apa yang dikerjakan dan bahkan bisa menyelesaikan trouble shooting yang diberikan dengan sempurna.
Implementasi Least Square Method Dalam Evaluasi Hasil Uprating Transformator Distribusi Rachmat Sutjipto; Sungkowo, Heri; Khristiana , Harrij Mukti; Kharisma , Dhimas Dhesah; Galang Putra Fauzy; Faradina Agiesta Anjali
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6450

Abstract

Overloading in distribution transformers negatively affects operational reliability, efficiency, and equipment lifespan. At Gardu Distribusi C0058 PT PLN (Persero) ULP Bululawang, the transformer with a 160 kVA capacity exceeded the safe loading threshold of 80%, reaching 92.2% in the first semester of 2022 and 90.1% in the second semester of 2022. This study aimed to analyze the effectiveness of the uprating method as a solution to mitigate overloading issues while ensuring long-term transformer performance. The research employed quantitative analysis with direct measurement, load factor evaluation, and load forecasting using the Least Square method. Before the uprating process, the transformer experienced a peak load of 147.55 kVA (91.7%), significantly surpassing the recommended safety limits. The uprating process increased the transformer capacity from 160 kVA to 200 kVA, reducing the loading percentage to 73.57%, which brought it back within the acceptable operational range. Furthermore, load forecasting using the Least Square method predicted that the transformer would remain within a safe load level, reaching 79.73% in 2027, ensuring stability for the next five years. These findings align with previous studies emphasizing the effectiveness of transformer uprating as an alternative to relocation or additional transformer installation. However, further research is required to evaluate the impact on protective devices and system reliability. This study highlights the viability of uprating as an efficient and cost-effective strategy for managing transformer overloading in distribution networks.
Evaluasi Operasional Pemutus Tenaga Gas SF6 di Gardu Induk 150 kV Rachmat Sutjipto; Heri Sungkowo; Muhammad Khairan; Slamet Nurhadi; Muhammad Fahmi Hakim
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6847

Abstract

Circuit Breaker (CB) is a critical component in high-voltage substations that functions to switch and disconnect electrical currents under normal and fault conditions. Over time, operational aging and environmental factors may degrade the performance of CB, potentially impacting power system reliability. This study aimed to evaluate the feasibility of 150 kV CB at Probolinggo Substation, particularly in Transformer Bay 1 and Transformer Bay 3, through a comparative analysis of insulation resistance, contact resistance, contact simultaneity, and SF6 gas purity based on tests conducted in 2021 and 2023. The study employed experimental methods and standard-based evaluations, referring to VDE (Catalogue 228/4), IEC 60694, SKDIR-0520/2014, and CIGRE standards. The findings revealed that although insulation resistance values showed slight degradation in 2023, they remained above the minimum threshold, ensuring safe operation. Contact resistance increased marginally due to dust accumulation and aging but still met the IEC 60694 standard. Contact simultaneity remained well within SKDIR-0520/2014 limits, indicating proper switching operation. SF6 gas purity tests showed a minor increase in moisture content due to condensation, yet all parameters complied with CIGRE standards. These results align with previous studies that highlight CB degradation over time but confirm that regular maintenance can sustain its operational reliability. This research underscores the importance of periodic monitoring and predictive maintenance strategies. Future work should explore real-time IoT-based monitoring and numerical simulations to enhance failure prediction models and optimize maintenance strategies for high-voltage circuit breakers.
Co-Authors Abd. Rasyid Syamsuri Agus Andrianto Aldiansyah Dwi Teguh Setyawan Anang Dasa Novfowan Awan Setiawan Awan Setiawan Bakti Indra Kurniawan Bakti Indra Kurniawan Budi Aji Dhesah Kharisma, Dhimas Dhimas Dhesah Kharisma Dimas Eriyanto Dinda Ayu Amalia Edo Enka Putra Pradana Epiwardi Epiwardi Epiwardi Epiwardi , Epiwardi Epiwardi Epiwardi Fahad, Waris Malik Fahmi Hakim, Muhammad Faradina Agiesta Anjali Galang Putra Fauzy Hafiz Furqoni Hafiz Furqoni Hakim, Muhammad Fahmi Handani, Galuh Prawestri Citra Hari Kurnia Safitri I Ketut Suada Ikfi Asmaul Khusna Joto, Ruwah Kharisma , Dhimas Dhesah Khristiana , Harrij Mukti Mieftah, Mochammad Mieftah, Muhammad Milzam Brillian Santana Mochammad Mieftah Mochammad Mieftah Mudjiono Mudjiono Muhammad Fahmi Hakim Muhammad Khairan Nadila, Dilavinsa Indar Putri Novfowan, Anang Dasa Nunun Setyo Nadia Putri Nurhadi - Nurhadi, Slamet Prasojo, Rahman Azis Rachmat Sutjipto Rachmat Sutjipto Rahmad Dwi Pramudya Rahman Azis Prasojo Rahman Azis Prasojo Reni Dwi Lestari Rohmanita Duanaputri Ruwahjoto Ruwahyoto Slamet Nurhadi Sukamdi Sukamdi Sulistyowati Susilo Sutjipto, Rachmat Wiwiek Rabiatul Adawiyah