Title :
Effects of terminal connections on sweep frequency response analysis of transformers
Author :
Al Murawwi, Esam ; Mardiana, Redy ; Su, Charles Q.
Abstract :
Many problems can arise in power transformers, beginning from the moment they arrive at the sites where they are to be installed [1], [2]. Sweep frequency response analysis (SFRA) is used by many industries and manufacturers to assess the mechanical integrity of the core, winding, and clamping structure of power transformers. It usually involves the application of low-voltage (LV) signal (2 to 15 V) at one terminal of the transformer, over the frequency range 20 Hz to 2 MHz, and measurement of the response at another terminal, as shown in Figure 1 [1]. The amplitude and phase transfer function are then determined.
Keywords :
frequency response; optical transfer function; power transformers; transformer cores; transformer windings; SFRA; amplitude transfer function; clamping structure; frequency 20 Hz to 2 MHz; mechanical integrity; phase transfer function; power transformer; sweep frequency response analysis; terminal connection effect; transformer core; winding; Frequency measurement; Frequency response; Magnetic cores; Oil insulation; Power transformer insulation; Windings; power transformer; sweep frequency response analysis; terminal connection;
Journal_Title :
Electrical Insulation Magazine, IEEE
DOI :
10.1109/MEI.2012.6192362
