Influence of Measurement Error on a New-Voltage-less Distance Protection Method

Li L, Biller M, Jäger J (2018)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2018

Pages Range: 54-58

Event location: Kaiserslautern DE

Abstract

On the one hand, closed ring operation of medium-voltage distribution networks leads to benefits such as voltage balancing and reduction of transportation losses and thus increases the networks capacity to integrate DERs. On the other hand, some significant problems for conventional distance protection arise. A new distance protection based on negative-sequence currents has been developed in order to determine the distance from the fault location to the relays at the substation for unbalanced faults. The impact of measurement errors from current transformers (CTs) and voltage transformers (VTs) on the accuracy of the new method is a question that remains. Thus, in this paper, an appropriate network model of an excerpt of a distribution grid is investigated. Steady-state fault calculation of unbalanced faults under several system states is executed using MATLAB. The impact of measurement errors from CTs and VTs on the determination of distance is considered. The results show that the distance results of the new method are by far more accurate than for the conventional distance protection method in most of the cases, even under the impact of measurement errors caused by CTs and VTs.

Authors with CRIS profile

Linjie Li Professur für Elektrische Energieversorgung Martin Biller Professur für Elektrische Energieversorgung Johann Jäger Professur für Elektrische Energieversorgung

How to cite

APA:

Li, L., Biller, M., & Jäger, J. (2018). Influence of Measurement Error on a New-Voltage-less Distance Protection Method. In Proceedings of the IEEE PESS Power and Energy Student Summit (pp. 54-58). Kaiserslautern, DE.

MLA:

Li, Linjie, Martin Biller, and Johann Jäger. "Influence of Measurement Error on a New-Voltage-less Distance Protection Method." Proceedings of the IEEE PESS Power and Energy Student Summit, Kaiserslautern 2018. 54-58.

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