A new algorithm for relaying and fault location based on autocorrelation of travelling waves

✍ Scribed by Y.G. Paithankar; M.T. Sant

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 513 KB
• Volume: 8
• Category: Article
• ISSN: 0378-7796
• DOI: 10.1016/0378-7796(85)90047-1

✦ Synopsis

The technique employs correlation of the incident and reflected wave signals at one end of the line. Since the reflected wave is very similar in shape to the incident wave causing it, except for a constant time delay and attenuation, autocorrelation results. The property of 'evenness' of the autocorrelation is used to determine the delay time, which is a function of fault position, employing numerical integration which is suitable for a digital computer. It is shown that fast relaying as well as accurate fault location is accomplished on a real-time basis, even in the presence of a considerable amount of high frequency line transients. The technique has been tested by numerical simulations using the standard Electromagnetic Transient Program (EMTP).