The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Partial discharge (PD) can be used to predict insulation failures in power transformers. Accurate detection of particular PD types has a significant role in anticipating forthcoming outages. However, the noise encountered with PD measurements negatively affects the detection accuracy. In this paper, we propose a robust PD detection technique that is immune to noise through efficient frequency domain-based...
Three Hilbert fractal antenna designs are proposed in this work to capture and classify common types of partial discharge (PD) in an oil insulated system. Each antenna design shows unique characteristics in terms of resonant frequencies, inception voltage, classification capabilities and noise performance. Three types of PD signals are artificially generated; namely, corona, surface and sharp PD....
This paper discusses the use of a one arm Archimedean Sinusoidal Spiral Antenna (ASSA) to capture high frequency signals generated by Partial Discharge (PD) in an oil filled transformer. The antenna is designed such that it blocks low frequencies which corresponds to corona and noise in the transformer and allows higher frequencies which result from harmful PD activities. The captured PD signals will...
Measuring partial discharge (PD) phenomena in power transformers is often conducted by acoustic emission (AE) method. However, many interference sources are usually encountered with the captured PD signals which negatively affect the PD detection and classification. Thus, an effective and efficient denoising technique is required to suppress such environmental noises. Most denoising attempts aim to...
In this paper the possibility to use an RF antenna for both partial discharge (PD) detection and transformer oil quality monitoring is investigated. First, several RF antenna designs such as the dipole, axial helix and circular loop, have been compared to obtain the best optimum design for the detection of partial discharge. It was found that the circular loop antenna has shown the best capability...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.