Publications (2)0 Total impact
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Conference Proceeding: The Design of A High Amplitude Impulse Current Generator
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ABSTRACT: More and more applications of ZnO arrester in electrical system experienced more problems. One thing, that is still under some investigation, is the effect of multiple lightning strike to the performance of ZnO arrester. As we know, the design of ZnO arrester for transmission system and for distribution system differs in the point of view of the number of ZnO blocks. Transmission system, due to its higher nominal voltage than distribution system, has more numbers in ZnO blocks inside an arrester tube. In term of the current rating of an arrester, it is found that there is some different value of the current rating. The current rating of an arrester installed closer to electrical substation is higher than that of some further away from the substation. To the respond of a lightning impulse strike, the arrester will let a high value of impulse current flowing. It tends to heat the ZnO material of the arrester. If the number of impulse strike is quite high then it may give the effect to the change of the arrester performance. This condition will endanger the equipment that is protected by the arrester from lightning strikes. During this research, the scope of work is limited to making an impulse current generator toward to one having 8/20 microsecond wave-shape. This kind of impulse current wave-shape is the one that is used for studying the performance of ZnO block.High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on; 12/2008 -
Article: Model Arrester SiC Menggunakan Model Arrester ZnO IEEE WG 3.4.11
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ABSTRACT: Arrester model is needed to analyse the insulation coordination in power system. The model should give a suitable respon for varying transient fault. In this paper, we conduct simulation that modified from IEEE WG 3.4.11 model. The model is modified by insert a switch that voltages dependent. Arrester modeling respons then compare to the laboratory testing result, with SiC 12 kV arrester sample. Testing conduct with time front varying from 1.2 to 29.7 s with magnitude 51 kV, 52.5 kV dan 54 kV. The difference between simulation and laboratory testing was 4.332 % for sparkovervoltage and 3.259 % for residual voltage discharge current Abstract in Bahasa Indonesia : Model arrester sangat dibutuhkan untuk menganalisis koordinasi isolasi dalam suatu sistem tenaga listrik. Model arrester yang dibuat harus memberikan tanggapan yang sesuai untuk semua kondisi gangguan transient. Dalam makalah ini dihasilkan simulasi dengan menggunakan model yang dimodifikasi dari model IEEE WG 3.4.11. Model ini dimodifikasi dengan menambahkan saklar yang dipengaruhi tegangan. Hasil yang didapatkan dari pemodelan kemudian akan dibandingkan dengan pengujian di laboratorium terhadap arrester SiC 12 kV. Pengujian dilakukan dengan surja tegangan dengan waktu muka 1.2 sampai 29.7 s dan puncak tegangan diberikan sebanyak 3 tingkatan, 51 kV, 52.5 kV dan 54 kV. Perbandingan hasil pengujian dan simulasi memberikan perbedaan sebesar 4.332 % untuk tegangan potong dan 3.259 % untuk tegangan residu arus pelepasan. Kata kunci: Model Arrester, Arrester SiC, Respons Transient.
