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All Journal Majalah Ilmiah Teknologi Elektro JAREE (Journal on Advanced Research in Electrical Engineering) Jurnal Nasional Teknik Elektro dan Teknologi Informasi
Tedy Juliandhy
Universitas Gadjah Mada
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Kegagalan Alat Flue Gas Desulphur Terhadap Tegangan Lewat Denyar Isolator di Gardu Induk Pembangkitan Tanjung Jati B Jepara Tedy Juliandhy; T Haryono; Suharyanto Suharyanto
Jurnal Teknologi Elektro Vol 13 No 1 (2014): (January - June) Majalah Ilmiah Teknologi Elektro
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (139.481 KB)

Abstract

Tegangan lewat denyar ( flashover ) adalah  fenomena pelepasan muatan  bersifat merusak yang melintasi  seluruh bagian permukaan isolator. Pelepasan muatan ini disebabkan pembebanan medan listrik pada permukaan isolator yang melebihi harga ketahanan elektriknya. Penyebab terjadinya tegangan lewat denyar adalah pengotoran permukaan isolator, hujan asam, surja hubung dan surja petir. Tegangan  lewat denyar atau flashover ini berupa loncatan api yang terjadi antara isolator atau komponen listrik tegangan tinggi. Hal ini dapat terjadi akibat gagalnya isolasi  sistem tegangan tinggi tersebut. Salah satu penyebab kegagalan isolasi pada isolator tegangan tinggi di Gardu induk Tanjung Jati B Jepara adalah  timbulnya hujan asam akibat kondensasi asap yang keluar dari cerobong  PLTU Tanjung Jati B.  Hujan asam timbul karena kegagalan peralatan Flue Gas Desulphur (FGD) yang dipasang di PLTU untuk mengurangi gas emisi sebagai persyaratan pembangkit listrik ramah lingkungan yang diprogramkan pemerintah melalui Kementerian  Lingkungan Hidup. Tindakan nyata ini dilakukan untuk menepis anggapan bahwa PLTU dengan bahan bakar batubara merupakan salah satu industri yang mengeluarkan gas  emisi SOx dan NOx yang tinggi pada proses operasionalnya. Efek gas emisi ini merupakan salah satu  penyebab terjadinya hujan asam pada lingkungan.  Banyaknya  kadar keasaman hujan asam yang terjadi di daerah industri akan selalu berpengaruh terhadap jaringan listrik tegangan tinggi yang sedang beroperasi menyalurkan daya listrik.  Adakalanya fungsi  peralatan tegangan tinggi seperti isolator di gardu induk yang menyalurkan daya listrik pada jaringan SUTET 500 kV pada jaringan JAMALI di Pulau Jawa terganggu dalam sistim operasinya karena polutan yang menempel di isolator. Hujan dengan pH antara 4 – 5 dikategorikan sebagai hujan asam dan pada pengujian ini mempengaruhi penurunan tegangan saat terjadinya  flashover sebesar  145,5 kV – 142,5 kV  dari tegangan kerja, hal ini  menyebabkan isolator sebagai bahan isolasi dapat diperkecil jarak rayap permukaan isolatornya sehingga dapat berpengaruh terhadap ketahanan suatu isolator dalam menjalankan fungsinya sebagai alat untuk menahan terjadinya kegagalan tegangan lewat denyar ( Flashover ) dari bagian-bagian yang bertegangan.
Breakdown Voltage Using Bond Energy Calculation for CF3CHCl2/CO2 Mixture as Insulation Applied Tedy Juliandhy; T. Haryono; Eka Firmansyah; Indra Perdana
JAREE (Journal on Advanced Research in Electrical Engineering) Vol 3, No 1 (2019): April
Publisher : Department of Electrical Engineering ITS and FORTEI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25796216.v3.i1.68

Abstract

Sulfur hexafluoride gas according to the Montreal Protocol and Kyoto protocol needs to be limited and gradually reduced because it causes global warming, the greenhouse effect and acid rain on the environment. The Kyoto protocol recommends the use of dichlorotrifluoroethane gas as one of the alternatives to substitute sulfur hexafluoride gas. This research discusses the use of dichlorotrifluoroethane gas mixed with CO2 gas which was known to be able to withstand the breakdown voltage of 592-870 kV. Comparing to breakdown voltage predictions using methods based on bond energy, Paschen's law and high voltage tests. Breakdown voltage deviations using bond energy were better than Paschen's law. The dichlorotrifluoroethane gas economy has a price of 5.18 times cheaper than hexafluoride sulfur gas. The ability of dichlorotrifluoroethane gas to insulation gas in gas insulated switchgear needs to be applied as a real potential substitute for sulfur hexafluoride gas.Keywords- bond energy, dichlorotrifluoroethane, gas insulated switchgear, Paschen’s law, sulfur hexafluoride, techno-economy.
Efek Kegagalan Alat Flue Gas Desulphur Terhadap Tegangan Lewat Denyar Isolator Tedy Juliandhy; T. Haryono; Suharyanto
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 3 No 2: Mei 2014
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (168.011 KB)

Abstract

Flashover is a disorder condition that occurs in the form of sparks appearing between insulators or electrical component of high voltage. This can occur due to insulation failure of the high voltage system. Failure of insulation in high voltage insulators in Tanjung Jati B substation Jepara is one of the causes of acid rain due to the condensation of smoke from the Tanjung Jati B power plant chimney. Acid rain arises due to failure Flue Gas Desulphur ( FGD ) devices were installed in the plant to reduce gas emissions as a condition of eco-friendly power plant that is planned by the government through the department of Environment . The real action is taken to dismiss the notion that power plant fuel coal is one of the industries that emit SOx and NOx emissions are high on operational processes . The effects of gas emissions is one of the causes of acid rain on the environment . The amount of acidity of acid rain that occurred in the industrial area will always affect the high voltage power lines that distribute power in operation . Sometimes the equipment functions as an insulator in high voltage substations that distribute power at 500 kV network SUTET JAMALI network on the island of Java in a system of operation is interrupted because of pollutants attached to the insulator . Rain with a pH between 4-5 categorized as acid rain and the test affects the time of the flashover voltage drop of 145.5 kV – 142.5 kV of the working voltage , this causes an insulator as insulation materials can be minimized distance insulator surface so that termites can affect the resistance of an insulator in its function as a tool to restrain the occurrence of flashover voltage from voltage parts.
Co-Authors Eka Firmansyah Indra Perdana Maemonah, Maemonah Suharyanto T Haryono T. Haryono T. Haryono