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Design of Distributed Generation with A Hybrid System in Karimunjawa Island Gunawan Gunawan; Suryani Alifah; Moh. Arif Raziqy
International Journal of Applied Power Engineering (IJAPE) Vol 4, No 3: December 2015
Publisher : Institute of Advanced Engineering and Science

The current condition, in Karimunjawa Island, is supplied by diesel power with a total power output of 400kW. The number of households in this island is 1545, while the number of electricity customers as many as 850 homes with the local electrification ratio of 55%. With such high load electrification, the generator is only operated from 05.00pm-06.00pm every day to limit the operating costs. Methodology used was the determination of the size of the PV generator capacity based on the percentage of daily generation. The selection of conversion technology with hybrid concept synergizes photovoltaic to be combined with diesel. Loading simulations are performed with HOMER application that provides a variety of features on a variety of configurations and scenarios designed.The first scenario is in the form of giving additional capacity by using the power of 100kW of PV system and at peak load by adding the duration of the day with 5 hours, it is obtained the production of PV of 800kWh/day with the selling price of $ 3,900;/kWh. The second scenario is in the form of giving additional capacity by using the power of 100kW of PV system at noon for 10 hours and during peak load, it gains total value production of PV with1400kWh/day and distributed to system with a selling price of Rp 3,867/kWh.

Studi Potensi dan Perencanaan Pembangkit Listrik Tenaga Mikro Hidro Di Bendung Simbang Kecamatan Doro Kabupaten Pekalongan M. Fanis Abdillah; Gunawan Gunawan; Agus Suprajitno
Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC) Vol 4, No 1 (2022): February
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v4i1.1132

The impact of greenhouse gas emissions is getting higher due to the use of fossil energy to drive power plants. Efforts to replace it is to develop renewable energy that is popular in Indonesia is micro hydro technology. This study aims to determine the potential of water energy and plant planning at Simbang Weir in Pekalongan. The method used combines water flow measurements with floating techniques and uses geographic information provided by Google Earth. The result of this research is that the water discharge is measured at 3.67 m3/s with a height of 11 meters. The turbine design uses crossflow with a potential power of 280.11 kW. The detailed engineering design is described in full in this study.

Analisis Partial Discharge dan Prediksi Usia Layak Isolasi Belitan Stator Generator 143,4 MVA Kukuh Widodo; Muhamad Haddin; Gunawan Gunawan
Energi & Kelistrikan Vol 12 No 1 (2020): Energi dan Kelistrikan: Jurnal Ilmiah
Publisher : Sekolah Tinggi Teknik PLN

ABSTRACT The arise of partial discharge in isolation of the winding stator generator is thing that general because existence ageing and excessive stress. Partial discharge in isolation of the winding stator occur in the core slot area or endwinding area. The problem that occur in isolation of the winding stator generator is the presence of corona and high partial discharge in the endwinding area caused by ineffective monitoring of partial discharge. This research discusses about that occurrence corona and partial discharge, and the effectiveness of repairing insulation of the stator winding that performed during overhaul. The analysis methods used is comparative, characteristics and trending, and linear regression to predict the age of operation worthiness in isolation of the winding stator. The results of the analysis showed that, the cause of corona and high partial discharge due to damage to the isolation surface consequence contamination from bearing seal oil which have seepage and load & thermal cycling, with the age of operation worthiness shortest isolation of the winding stator during ± 2 years 1 month 21 days or only increased 14 days after overhaul. Keywords : partial discharge, corona, linear regression, age of worthiness isolation of the winding ABSTRAK Timbulnya partial discharge pada isolasi belitan stator generator merupakan hal yang umum terjadi karena adanya penuaan dan tekanan yang berlebih. Partial discharge pada isolasi belitan stator terjadi di area slot inti atau area endwinding. Permasalahan yang terjadi pada isolasi belitan stator generator adalah adanya korona dan partial discharge tinggi pada area endwinding yang disebabkan karena kurang efektifnya monitoring terhadap partial discharge. Penelitian ini membahas tentang terjadinya korona dan partial discharge, serta efektifitas perbaikan isolasi belitan stator generator yang dilakukan saat overhaul. Metode analisa yang digunakan adalah komparasi, karateristik dan trending, serta regresi linear untuk memprediksi usia kelayakan operasi isolasi belitan stator. Hasil analisa menunjukkan bahwa, penyebab terjadinya korona dan partial discharge tinggi karena adanya kerusakan pada permukaan isolasi akibat kontaminasi minyak dari seal oil bearing 5 yang mengalami rembesan dan load & thermal cycling, dengan usia kelayakan operasi tersingkat isolasi belitan stator selama ± 2 tahun 1 bulan 21 hari atau hanya mengalami kenaikan 14 hari setelah overhaul. Kata kunci : partial discharge, korona, regresi linear, usia layak isolasi belitan

Analisa Kelayakan Pentanahan Tower Saluran Udara Tegangan Tinggi (SUTT) 150kV Jelok – Bringin Menggunakan Metode Komparasi Dedi Pranatali; Gunawan Gunawan; Dedi Nugroho
JTEV (Jurnal Teknik Elektro dan Vokasional) Vol 8, No 2 (2022): JTEV (Jurnal Teknik Elektro dan Vokasional)
Publisher : Universitas Negeri Padang

Saluran Udara Tegangan Tinggi (SUTT) 150 kV Jelok – Bringin adalah salah satu penghantar di wilayah kerja PT PLN (Persero) Unit Pelaksana Transmisi Salatiga, penghantar ini menghubungkan dua Sub Sistem Utama yaitu Sub Sistem Ungaran dengan Sub Sistem Pedan. Sesuai dengan Buku Petir PLN Tahun 2020 tercatat sebanyak 722 kejadian petir selama tahun 2019 pada penghantar tersebut.Sebagai upaya mengurangi resiko akibat petir perlu memastikan sistem proteksi bekerja dengan baik. Obyek proteksi adalah tower SUTT 150kV dengan sistem pentanahan yang layak. Penelitian ini menelusur data menggunakan metode komparasi yaitu membandingkan antara hasil pengukuran di lapangan dengan nilai standar pengukuran yang digunakan. Informasi mengenai kelayakan perlu selalu terbarui yang didukung hasil pengukuran yang tepat dan akurat secara konsisten. Kondisi ground rod, kondisi tanah dan kondisi kontak antara ground rod dengan penghantar pentanahan merupakan variabel yang mempengaruhi hasil dari pengukuran pentanahan. Penambahan sebuah elektoda batang dengan panjang 6 meter dapat memperbaiki nilai tahanan pentanahan sebesar 3,5287 Ohm yang berarti memenuhi persyaratan (<10 Ohm-standar SK DIR PLN No. 0520-1.K/DIR/2014). Dari hasil pengukuran 23 unit tower dari 24 unit tower atau 95,83% dari total tower, karakteristik hasil pengukurannya masih relatif dalam kondisi layak yaitu dibawah 10 Ohm.

Pelatihan Digital Financial Literacy Bagi UMKM Ikan Asap Desa Bulak, Kecamatan Rowosari, Kabupaten Kendal Mutamimah Mutamimah; Lisa Kartikasari; Gunawan Gunawan; Indri Kartika
JPM: Jurnal Pengabdian Masyarakat Vol. 3 No. 1 (2022): Juli 2022
Publisher : Forum Kerjasama Pendidikan Tinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/jpm.v3i1.591

Smoked fish SMEs have a strategic role in economic empowerment and poverty reduction in Kab. Kendal. However, the smoked fish SMEs have not developed well, one of the reasons is that the majority of them do not have the knowledge, understanding and skills of digital finance. They use digital only through watshap, face book, IG to market smoked fish products to various regions. In addition, the MSMEs of smoked fish in Bulak Village do not understand the risks of using digital, and do not understand the method of digitally recording financial transactions. Therefore, the purpose of this community service is to increase knowledge, understanding, and digital financial skills through digital financial literacy for smoked fish MSMEs in Bulak Village, Kec. Rowosari, Kab. Kendal. The implementation method consists of 3 stages, namely: a). Conducted an initial survey to the location with the head of Bulak Village, smoked fish MSMEs players and the Kab. Kendal to find out the potential and problems of smoked fish MSMEs in Bulak Village, Kec. Rowosari, Kab. Kendal. b). Provide digital financial literacy training for smoked fish MSMEs in Bulak Village, Rowosari District, Kab. Kendal. c). Assessing the performance of community service. The results show that digital financial literacy training can increase knowledge, understanding and skills in conducting digital transactions, digital financial risks, digital bookkeeping, and digital financial reports as a basis for decision making for smoked fish MSMEs in Bulak Village, Rowosari District, Kab. Kendal.

Desain Pembangkit Listrik Tenaga Mikrohidro di Air Terjun Kedung Kayang Dedi Nugroho; Agus Suprajitno; Gunawan Gunawan
Jurnal Rekayasa Elektrika Vol 13, No 3 (2017)
Publisher : Universitas Syiah Kuala

Kedung Kayang waterfall is located on the border of Magelang and Boyolali regency of Central Java. The waterfall is 38 meters high, so it has the potential to be used as a micro hydro power plant (MHP). In designing the MHP, it requires some studies including hydrology, civil, mechanical, and electrical. The purpose of this research is to predict the water discharge, determine the potential of hydro power, selection of MHP sites, design of hydro turbine and electric generator. This research uses Penman Modification method to calculate evapotranspiration, Mock method to calculate water discharge, geographical mapping for MHP sites selection and cross-flow turbine design calculation. This paper presents the results of MHP design consist of MHP capacity, selection of MHP sites, penstock design, cross-flow turbine design and electric generator selection. The result showed that dependable water discharge is 0.143 m3 / sec, effective head is 19.5 meters, hydro potential is 27.33 kW, and electric power that can be produced is 18 kW, length and diameter penstock are 81,74 m and 26,77 m, hydro turbine used cross flow type with outer diameter of the runner is 17,17 cm, inner diameter is 11,45 cm and width is 59,16 cm. MHP site is located in Klakah village, Selo Sub-district, Boyolali District.

Desain Pembangkit Listrik Tenaga Mikrohidro di Air Terjun Kedung Kayang Dedi Nugroho; Agus Suprajitno; Gunawan Gunawan
Jurnal Rekayasa Elektrika Vol 13, No 3 (2017)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v13i3.8554

Kedung Kayang waterfall is located on the border of Magelang and Boyolali regency of Central Java. The waterfall is 38 meters high, so it has the potential to be used as a micro hydro power plant (MHP). In designing the MHP, it requires some studies including hydrology, civil, mechanical, and electrical. The purpose of this research is to predict the water discharge, determine the potential of hydro power, selection of MHP sites, design of hydro turbine and electric generator. This research uses Penman Modification method to calculate evapotranspiration, Mock method to calculate water discharge, geographical mapping for MHP sites selection and cross-flow turbine design calculation. This paper presents the results of MHP design consist of MHP capacity, selection of MHP sites, penstock design, cross-flow turbine design and electric generator selection. The result showed that dependable water discharge is 0.143 m3 / sec, effective head is 19.5 meters, hydro potential is 27.33 kW, and electric power that can be produced is 18 kW, length and diameter penstock are 81,74 m and 26,77 m, hydro turbine used cross flow type with outer diameter of the runner is 17,17 cm, inner diameter is 11,45 cm and width is 59,16 cm. MHP site is located in Klakah village, Selo Sub-district, Boyolali District.

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