Effective System Grounding. Analysis of the effect of High penetration of IBRs

The transmission system has been grounded since its interconnection began in the 1900s. For over a century, generation was overwhelmingly provided by rotating machinery, and industry standards were implemented to keep the grounding effective. With the growing interconnection of large quantities of e...

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Bibliographic Details
Published in2021 74th Conference for Protective Relay Engineers (CPRE) pp. 1 - 10
Main Authors Billaut, Sebastien C., Miles, Adam R., Chapman, Brittany N., Johnson, Joseph C., Konsavage, Colleen T., Kumar, Praveen K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.03.2021
Subjects
Fuses
Grounding
Industries
Insulation
inverter-based resources (IBRs)
Inverters
Protective relaying
Reliability
Transmission grounding
ungrounded
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Summary:The transmission system has been grounded since its interconnection began in the 1900s. For over a century, generation was overwhelmingly provided by rotating machinery, and industry standards were implemented to keep the grounding effective. With the growing interconnection of large quantities of electronic power sources (inverter-based resources, for example) on the transmission system, some underlying assumptions related to the sources being rotating machinery are no longer valid. Consequently, traditional system grounding practices must be reexamined to ensure proper grounding as the transmission system evolves. This paper reviews why transmission systems are designed to be grounded, then discusses ways to keep the system grounded when most of its generation sources are inverters.
ISSN:2474-9753
DOI:10.1109/CPRE48231.2021.9429857