Desain dan Implementasi Modul Pengujian Feroresonansi pada Transformator Tegangan Rendah

Rifma, Neisya Islamey (2018) Desain dan Implementasi Modul Pengujian Feroresonansi pada Transformator Tegangan Rendah. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Fenomena feroresonansi adalah suatu fenomena yang biasanya terjadi pada transformator yang diseri dengan kapasitor. Rangkaian ini akan menimbulkan tegangan lebih berosilasi pada transformator saat dipicu kejadian transien. Kejadian transien seperti hubung singkat, pengoperasian pemutus daya (switching), dan petir, ini memicu peralihan sistem secara tiba-tiba sehingga memberikan dampak buruk bagi transformator dan sistem. Pada studi ini, perancangan modul pengujian feroresonansi dilakukan untuk mendapatkan karakteristik fisik feroresonansi. Perancangan dimulai dengan pemilihan range kapasitansi dengan pendekatan Rudenburg’s graphical method berdasarkan kurva magnetisasi transformator. Modul langsung diimplementasi pada transformator satu fasa 110 V jenis inti H dan M. Variasi tegangan sumber, variasi nilai kapasitansi dan variasi konfigurasi dilakukan pada pengujian ini. Respon feroresonansi di tegangan transformator akan di lihat spektrum harmonisa dan besar THD untuk mengklasifikasi mode-mode feroresonansi yang muncul. Hasil menunjukan mode fundamental mendominasi bentuk feroresonansi yang muncul pada pengujian ini, dengan THD terbesar 26,55 % dimiliki oleh transformator inti H dengan kapasitor 10 uF di konfigurasi seri. Sementara mode subharmonic muncul pada konfigurasi seri-paralel (Cseries 70 uF dan Cshunt 30 uF) di transfomator inti M dengan THD maksimum sebesar 34.99 %. =================== Ferroresonance is a phenomenon that usually occurs in a series circuit between transformer and capacitor. This circuit will cause oscillating overvoltage on the transformer when triggered by transient events. Transient events such as short circuit, switching operation, and lightning, this triggers a sudden transition of the system to adversely affect transformers and systems. In this final project, the design of ferroresonance testing module is used to obtain the physical characteristics of ferroresonance. The design begins with the selection of capacitance range with Rudenburg's graphical method approach based on the transformer magnetization curve. The module is directly implemented on a single phase 110 V transformer type of core H and M. Voltage source variation, capacitance value variation and configuration variation are performed on this test. The ferroresonance response at the transformer voltage will see the harmonic and large spectrum of THD to classify the emerging feroresonance modes. The results show that the fundamental mode dominates the ferroresonance form that appears in this test, with the largest THD of 26.55 % owned by the H core transformer with a 10 uF capacitor in the series configuration. While subharmonic mode appears in the parallel-series configuration (Cseries 70 uF and Cshunt 30 uF) in the core transfomator M with a maximum THD of 34.99 %.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: modul pengujian feroresonansi, transformator, karakteristik fisik feroresonansi, ferroresonance test module, transformator, ferroresonance physical characteristics, oscillating overvoltage
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves).
Divisions: Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: Rifma Neisya Islamey
Date Deposited: 23 Oct 2018 04:33
Last Modified: 23 Oct 2018 04:33
URI: http://repository.its.ac.id/id/eprint/52840

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