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The Criterion for Electromagnetic Compatibility Evaluation in High Voltage Substations

  • Tomaž ŽivicEmail author
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 598)

Abstract

Currently, there is no international standardized method for assessing the provision of electromagnetic compatibility in substations. For more than 25 years a test method for measuring transient overvoltages in secondary circuits of instrument transformers is in use in the Slovenian electric power system. As a source of disturbances, this method uses the switching of the high voltage disconnector. Measurements are performed mainly in secondary circuits of current and voltage instrument transformers. After comparing the peak measured values to limit values conclusions are made whether the electromagnetic compatibility is achieved or not. It has been found that a different analysis procedure is needed, which is more flexible and provides more information. The solution was found in statistical approach to the analysis. A retrospective statistical analysis of oscilloscope recordings from 30 air-insulated high voltage substations was made. First, absolute values of recordings were calculated. Then they were tested for normality of distribution and transformed, since the distribution does not follow the normal one. On transformed data descriptive statistics (arithmetic mean and standard deviation) were calculated, which, in addition to the type test value of immunity for secondary equipment and two factors, comprise a new criterion. Two examples are presented that illustrate the use of the newly proposed criterion in assessing electromagnetic compatibility.

Keywords

Electromagnetic compatibility High voltage substation Transient overvoltage Statistical analysis 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Milan Vidmar Electric Power Research InstituteLjubljanaSlovenia

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