Abstract
Mechanical shift of windings is serious problem of power transformers which belong to the very significant components of power engineering system. Mechanical displacements and following insulation failure due to short circuit and inrush currents can lead to an emergency situation. That’s why the effective control technology of windings is an relevant task of a current power engineering. A new approach to winding state control technology is described in the paper. The described technology is based on nanosecond probing impulse duration with short (no more than 20 ns) rapidness of front impulse. The experimental results of sensitivity growth at decreasing front pulse duration are shown. The experimental equipment and research are described. It is established that duration of probing impulse has optimum value around 100ns. It is shown that it is possible to do a condition control under operating voltage. It is shown that both shorter probing impulse and front of probe pulse duration allows upgrading common effectiveness of the diagnostic technology.
Highlights
The Electrical strength of windings insulation is a necessary condition of a power transformer stable operation
The difference in the normogram and defectograms represents the problem in the winding
This method was very popular in European, American countries [2] and was called the Low-Voltage Impulses method (LVI)
Summary
The Electrical strength of windings insulation is a necessary condition of a power transformer stable operation. It is necessary to measure the normogram This is a response from the winding of the working transformer. The difference in the normogram and defectograms represents the problem in the winding This method was very popular in European, American countries [2] and was called the Low-Voltage Impulses method (LVI). The amplitude-frequency characteristics are compared with the normograms, received on the serviceable transformer. This allows to avoid strong influence of circuit parameters to measurement results.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
