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Dina Mariani
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Universitas Muhammadiyah Semarang FT-FMIPA Building, 7nd Floor. Department of Electrical Engineering Jl. Kedungmundu Raya No. 18, Kota Semarang, Prov. Jawa Tengah, Indonesia 50273 Phone: 085299398663 Email: mediaelektrika@unimus.ac.id
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MEDIA ELEKTRIKA
Published by Universitas Muhammadiyah Semarang
ISSN : 19797451     EISSN : 2579972X     DOI : 10.26714/me.14.2.2021.62-75
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Media Elektrika is an electrical engineering journal that gives concerns on sciences related to electrical engineering. It includes the following fields: Electrical power engineering Electronics Telecommunication Control Informatics and computer technology
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 5 Documents
 1 
Search results for , issue "Vol 5, No 1 (2012): MEDIA ELEKTRIKA" : 5 Documents clear
PENGENDALIAN BEBAN GENERATOR SECARA OTOMATIS DENGAN ALGORITMA PID PADA PLTMH BERBASIS PLC - Hardiansyah; Eka Firmansyah; M Isnaeni BS
MEDIA ELEKTRIKA Vol 5, No 1 (2012): MEDIA ELEKTRIKA
Publisher : PSTE UNIMUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12447.372 KB) | DOI: 10.26714/me.5.1.2012.%p

Abstract

Micro hydro power system (PLTMh) is a plant thai utilizes water flow. To stabilize the flow of electricity produced by the generator it is necessary to control the use of the load on the generator. PLTMh currently only using electronic devices to controls the lood have some weakness such as monitoring of the PLTMh to be done is directly and continuously so it will cost and effort very much. This research aims to control the PLTMH automatically using Programmable Logic Controller (PLC) twido TWDLMDA 20 DRT using the algorithm Proportional Integral Derivative (PID) and can allow remote monitoring of the PLTMH in combination with Supervisory Control and data Acquisition (SCADA). By wing the PLC controlling the generator can be stabilized on the circumstances we want is at a voltage of 220 volts with a frequency of 50 Hz.Keyword: PLTMH
PENGARUH OVER EKSITASI PADA TRANSFORMATOR DISTRIBUSI DI GARDU INDUK SERPONG TERHADAP PENUAAN ISOLASI KERTAS DITINJAU DARI SISI TERMAL Muhammad Luqmanul Hakim; Aris Kiswanto; M. Tony Prasetyo
MEDIA ELEKTRIKA Vol 5, No 1 (2012): MEDIA ELEKTRIKA
Publisher : PSTE UNIMUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10440.32 KB) | DOI: 10.26714/me.5.1.2012.%p

Abstract

Distribution of electricity to consumers through some process that begins from power plants to substations supplied (sub-station), then lowered into the substation -a low-voltage distribution substations. The distance is too far between the point on the voltage distribution in particular between the IBT to the parent distribution substation secondary voltage drop triggers, It is as well as on the distance between new or IBT IBT cilegon Gandul to trigger serpong substation secondary voltage drop at substation serpong.To stabilize the voltage of the secondary to the primary voltage on distribution transformer tap changer operation. Problems arise when the tap changer to operate too much will lead to the over-excitation of the distribution transformer. The side effects of the over-excitation also trigger an increase in temperature of the thermal transformer, so the effect on the components within it, is no exception to the isolation of paper inthe process of thermal temperature rise is accelerating aging insulating paper it self. The exixtence of aging insulating paper must be accompanied by the estimated number of clear that the replacement of aging insulating paper on time, so it requires the calculation of accurate data on the thermal temperature kenaiakan to aging transformer paper insulation.Keywords: electricity distribution process, reduced secondary voltage, over-excitation, aging insulating paper, the estimated value.
PENGUJIAN SUDUT KONTAK PADA BAHAN ISOLASI RESIN EPOKSI DENGAN PENGISI PASIR PANTAI YANG MENGANDUNG BANYAK KALSIUM M. Toni Prasetyo; Hamzah Berahim; T Haryono
MEDIA ELEKTRIKA Vol 5, No 1 (2012): MEDIA ELEKTRIKA
Publisher : PSTE UNIMUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6560.356 KB) | DOI: 10.26714/me.5.1.2012.%p

Abstract

Formation tracking power (electrical tracking) on the surface of an insulating material due to flashover continuously, especially when there are contaminants flotving on the surface of the insulating material. Due to electrical tracking the insulation material surface to be broken and easier flow of electric current. Insulating material must have good electrical characteristics leakage current is very small, the critical flashover voltage is very large and the surface is hydrophobic materials The material used in this study is an epoxy, resin insulating silicone rubber polymer with a fillerKukup beach sand containing a lot of caicium carbonate with stoichiomelric values (the ratio of materials and hardener or curing agent) is equal to 1, with values increasing sizefiller (filler) , 120x50 mm sample size. The study was conducted in the laboratory according to standard IEC 587: 1984. In this study, the effect of the variation of the filling of the contact angle and its influence on surface degradation caused by charging, were analyzed. The result showed that the epoxy resin used in this study whice are categorized partly wet (partially wetted) and approached hydrophobic. The more concentration of silicone rubber and sand as filler (filler.) will increase the hydrophobic nature of the contact angle shown is growing. lf the surface is hydrophobic, then the time required for the first discharge and breakdown on the surface of the old material.Keywords: epoxy resins, fillers, contact angle, hydrophobicity
ANALISA KEANDALAN SISTEM TENAGA LISTRIK JAWA TENGAH DAN DIY PERIODE TAHUN 2009-2011 Eri Yawantoro; Bambang Supradono; Achmad Solichan
MEDIA ELEKTRIKA Vol 5, No 1 (2012): MEDIA ELEKTRIKA
Publisher : PSTE UNIMUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10997.925 KB) | DOI: 10.26714/me.5.1.2012.%p

Abstract

Power Plant units are responsible for providing power generation in the power system so that the load can be served.Poer Plant units may trouble each time. The disorder resulting plants cannot operate. If this interference occurs at the same time on several large generating units, it is possible that the power available in the system is reduced such that the system is not sufficient to serve the load. Reliability cf the electrical system must be maintained and enhanced, so that the load needs to be served. Thus it is necessary to investigate whether or not the reliability of the system every year. Reliability of the electrical system can be determined by calculating the value of (loss of load probability) LOLP with units of days / year. The smaller the value, the better the level of LOLPkendalan an electrical system. In 2009 the electrical system of Central Java and Yogyakarta not meet the standards, ie the value of LOLP 4.088 days / year. For the years 2010 and 2011 has increased reliability and meet the standards, with the value of 0.043 days in 2010 and 0.017 in 2011 days.Keywords: LOLP, reliability of Electric Power Systems
RANCANG BANGUN ALAT PEMANAS AIR DAN KONSERVASI ENERGI PADA MESIN PENDINGIN AC 1PK Gilang Akbar Sumarta; Bambang Supradono; Aris Kiswanto
MEDIA ELEKTRIKA Vol 5, No 1 (2012): MEDIA ELEKTRIKA
Publisher : PSTE UNIMUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5900.341 KB) | DOI: 10.26714/me.5.1.2012.%p

Abstract

Presidential Instruction recently about saving and energt efficiency, it is necessary that efforts should be made to support the program. In energy savings in the household sector can be done in various wavs from the smallest thing turning off lights that are not necessary to the utilization of waste heatfrom air conditioning to hot water purposes. Alternative technologies, the heat energy generated by the air conditioning unit is the potential energy that can be utilized to get hot water for free. Given theclimate in Indonesia is quite hot, many hospitals, hotels, residential upper middle or apartment is equipped with air-conditioning and heat generated in the cooling system is disposed into the environment. Infact. the heat energy can be used for heating water can be usedf or water bath or otherpurposes. It is necessary to develop a means of combined cooling and heating water. These devices are expected simultaneously to increase comfort and save energy.Keywords: Conservation of energy in refrigeration I pk

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