Abstract
Low-frequency transient oscillatory voltages and currents have prompted the development of new distance protection schemes for UHV and EHV power lines with large stray capacitances. The authors describe a scheme that is based on a differential equation for the transmission lines. An integral method with an interpolation technique is applied using a very limited number of data at a sampling rate of 600 Hz. A prototype digital distance relay composed of two 16-bit microprocessors is developed. The characteristic test results correspond well to the results of fault simulations. The method is verified to have an accuracy of +or-5% and require an operating time of less than 50 ms.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.