Performance Testing of Distance Protection under Weak in-feed Sources based on IEC61850 tools

Melake Kuflom, Peter Crossley

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Increasing penetration of non-synchronous generation and a decline in the availability of bulk synchronous power generators poses a challenge to the operating performance of conventional protection relays. Consequently, the effectiveness of conventional protection under low fault levels needs to be reviewed, particularly for expected future GB transmission network operating scenarios. Consider a double circuit transmission line with a converter source connected to the sending bus bar and then consider the operation of a time stepped distance relay located on a line connected to the sending bus. Variations in the fault level, seen when a fault occurs on the protected line or an adjacent line, may influence the effectiveness of the relay. The proposed paper will investigate the impact of low fault levels on the sensitivity of distance protection, and will take into consideration the fault level resulting from non-synchronous sources connected at the transmission level. The paper will also consider the protection problems caused by a strong in-feed source at one line end and an open circuit at the other end. An Omicron CMC 256-6 with IEC61850 functionality will be used to assess the operating performance of the distance relay. Various solutions will be proposed based on the problems observed
    Original languageEnglish
    Title of host publicationPAC World (PACW) 2018
    Pages1-6
    Number of pages6
    Publication statusPublished - 29 Jun 2018

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