Abstract
The application of combined overhead and cable power lines (OCPLs) of 110 kV voltage rate and higher call for new features for power system protection and automation devices. One of the most urgent is the problem of autoreclosing (AR) of OCPL. One or another solution to this problem significantly affects the reliability and efficiency of the OCPL operating. In many countries, both non-selective AR and selective AR are used. A method of selective AR of OCPL based on traveling waves is proposed, which increases the reliability of OCPL protection and automation. The method uses a special procedure of traveling wave pattern classification for faulted section identification.
Highlights
Nowadays, overhead and cable power lines (OCPLs) are becoming more common in large cities
There are several faulted section identification methods for selective AR of OCPL plenty large enough to classify them by operating principle. (Fig. 1): 1) The first class of methods is differential in which faulted section identified with signals measurements by the ends of controlled zones [1]–[3]
Distant methods of selective AR of OCPL can be described in terms of their operational principle as methods based on measurements of signals at the line terminals, not at ends of underground cable lines (UCL) or overhead lines (OL) sections
Summary
OCPLs are becoming more common in large cities This is due to the need to replace some overhead lines (OL) with underground cable lines (UCL). There is additional damage may be caused by re-energization OCPL without faulted section identification (nonselective AR of OCPL) in case of faults on UCL. Thereby it is relevant to employ selective AR of OCPL, which performs specified faulted section identification procedure before reclosing attempts and block AR if a fault on UCL. In this meaning, the paper's goal is to analyze and outlook existing methods of AR of OCPL and to evaluate prospects for their application
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