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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Edufisika: Jurnal Pendidikan Fisika Jurnal Psikologi Perseptual Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Pengembangan Rekayasa dan Teknologi Elektrika Jambura Journal of Electrical and Electronics Engineering International Journal on Advanced Technology, Engineering, and Information System (IJATEIS) Electrician : Jurnal Rekayasa dan Teknologi Elektro Tematik Jurnal Pembelajaran dan Ilmu Pendidikan Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Gotong Royong Journal of Community Engagement in Health
Titik Nurhayati
Program Studi Teknik Elektro, Universitas Semarang
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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PEMODELAN SISTEM PEMBANGKIT HYBRID ENERGI SOLAR DAN ANGIN Harmini, Harmini; Nurhayati, Titik
Elektrika Vol. 10 No. 2 (2018): Oktober 2018
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1008.067 KB) | DOI: 10.26623/elektrika.v10i2.1167

Abstract

Hybrid energy system is to combine two energy sources that will provide power to the load. Sources of solar energy and wind energy will be used to generate power. In this research will be designed a model of hybrid system of solar energy and wind energy. The system is made equipped with energy storage systems in the form of batteries. Simulation or modeling using a circuit with components appropriate to the field application. Analysis of this system is the performance of hybrid generator characteristics based on load changes in the form of voltage, current and power values. The power generated by the PLTS is 3,000 Watts and the wind generator is 1,000 Watt with a resistive load of 4,000 Watt. Hybrid system generates a power of 2640 Watt so that the efficiency of hybrid system by 66%Keywords: Hybrid system, wind energy, solar energy
SIMULASI PH AIR UNTUK AIR BOILER DAN AIR CHILLER PADA MESIN PRODUKSI REFRIGERATOR DENGAN MENGGUNAKAN LOGIKA FUZZY Irawan, Andhika; Heranurweni, Sri; Nurhayati, Titik
Elektrika Vol. 11 No. 1 (2019): April 2019
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.48 KB) | DOI: 10.26623/elektrika.v11i1.1541

Abstract

The need for water is very important for the production process, the water quality must also be considered the pH value so that the water is suitable for use in boilers or chillers. Seeing from these needs a simulation was made on matlab R2017a using a fuzzy toolbox that can find out the water quality with fuzzy mamdani method. This fuzzy logic simulation can determine the standard value of boiler water pH (10.5-11.5) and the standard pH value of chiller water (6-8) in the production machine. The methods in fuzzy logic used are mamdani and centroid methods as deffuzification with R2017a matlab simulation tool. The fuzzy inference system used is the mamdani method. This study made a simulation of mamdani method that can determine the quality of the PH water produced by using fuzzy logic. Chiller water pH can be used if iron ion values (0-2 ppm), silica ions (50-150 ppm), Total Dissolved Solid (TDS) (500-1000 ppm), total Hardness (100-200 ppm), M-alkalinity (500-750 ppm) from the standard value, the pH of the chiller water can be proven to reach a water pH value of 6-8. Boiler water pH can be used if iron ion values (0-2 ppm), silica ions (100-150 ppm), Total Dissolved Solid (TDS) (2000-3500 ppm), total Hardness (0-3 ppm), M-alkalinity (700-800 ppm) from the standard value, the pH of boiler water can be proven to reach a water pH value of 10.5-11.5.Keywords: fuzzy logic, Mamdani method, pH of boiler water
Desain Solar Power Inverter pada Sistem Photovoltaic Harmini, Harmini; Nurhayati, Titik
Elektrika Vol. 12 No. 1 (2020): April 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (750.951 KB) | DOI: 10.26623/elektrika.v12i1.1863

Abstract

Solar power inverter is one of the main components in the PLTS system in order to produce the power or energy needed by the load. Solar power inverter is used to convert from DC energy (Direct Current) to AC (Alternating Current) to load. In this research a simulation of a solar power inverter system on a photovoltaic system will be designed. Simulation is done using SIMULINK-MATLAB software. Solar power inverter is designed using a boost converter as a controller and a Full-Bridge Inverter. Boost Converter is designed from 12VDC - 17 VDC to 300 VDC. Full Bridge Inverter produces AC voltage of 240 VAC with modulation index 0.8 and frequency 60 Hz. Total Harmonic Distortion is 46.07%. Power of Photovoltaic Solar panels generated at 3500 Watts at 1000 Watt / m2 irradiation conditions and temperature temperatures of 25 degrees Celsius.
Pendekatan Diagnostik Dielectric Frequency Response (DFR) dan Water Content Dalam Mengidentifikasi Anomali Tan Delta yang Melebihi Standar Cigré TB 445 Pada Pengujian Transformator Daya Wijayanto, Muhammad Alvis; Supari; Nurhayati, Titik
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i5.58756

Abstract

Keandalan transformator daya bergantung pada kondisi isolasi, di mana tan delta >1% (CIGRE TB 445) mengindikasikan degradasi. Namun, penyebab spesifik anomali ini seringkali tidak terdiagnosis secara holistik. Tujuan dari penelitian ini adalah untuk menyelidiki penyebab tan delta tinggi melalui integrasi pengujian DFR dan water content pada transformator 80 MVA berusia 20 tahun. Pengujian tan delta (GST-g, UST), DFR, dan Karl Fischer untuk water content, diikuti analisis komparatif terhadap standar. Nilai tan delta 1,0509% disebabkan degradasi oli (water content 28,56 ppm), meskipun kertas isolasi kering (1,8%) dan konduktivitas oli optimal (4,1 pS/m). Penelitian ini menekankan pentingnya kombinasi DFR-water content untuk diagnosis akurat dan merekomendasikan purifikasi/regenerasi oli sebagai mitigasi. Temuan ini mendorong pengembangan model prediktif dan evaluasi oli alternatif dalam penelitian selanjutnya.
Co-Authors Aditya Pradana, Aditya Andi Kurniawan Andi Kurniawan Nugroho aryan, isya Budiani Destyningtias Budiani Destyningtias Destiningtyas, Budiani Dinar Mutiara K.N Fariansyah, Irham Hardani Widhiastuti Harmini Harmini Harmini, Harmini Irawan, Andhika Istata, Marita Dony ISYA ARYAN, ISYA ARYAN SULISTYO Juliartadi, Hendra Ady Karnoto . Nurul, Yusuf Rusliyana Nuarita, Rusliyana Samsuri Samsuri Satria Pinandita Septiani, Tri Asih Sianipar, Niko Ardiansa Sri Heranurweni Supari Supari Supari, Supari Wahyu Pramon, Eko Wijayanto, Muhammad Alvis Yudi Kurniawan