Location of high impedance faults using smart meters in distribution systems with DGs, power electronic loads and electric arc furnaces

Radhakrishnan, A and Das, S (2019) Location of high impedance faults using smart meters in distribution systems with DGs, power electronic loads and electric arc furnaces. In: 2019 IEEE Milan PowerTech, PowerTech 2019, 23 June 2019 - 27 June 2019, Milan.

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Abstract

High Impedance Faults (HIF) are known to be difficult to detect and locate on account of their low fault current magnitudes. Numerous efforts have been made in the literature to address HIF detection. However, location of HIFs has remained as a challenge to the protection engineers. This paper proposes a novel method to locate HIFs using Smart Meters (SM) in distribution systems containing Distributed Generators (DGs), power electronic loads and Electric Arc Furnaces (EAFs). SMs are usually available at all the load points throughout the distribution network. They measure the load currents and the load voltages. The fault signature of HIF is significant at the SMs which are in close proximity to the fault. The proposed method uses the SMs to compute an index to capture second harmonic content in the load voltage measurements after removing the effect of EAFs. The HIF is then identified to be located in a zone defined by SMs adjacent to the SM with highest second harmonic index. The performance of the proposed method has been evaluated considering EAFs, DGs and power electronics interfaced loads. Additional test cases such as transformer energization, capacitor switching and load switching have been considered to evaluate the performance. The proposed algorithm has also been implemented on a commercial smart energymeter to demonstrate the feasibility. © 2019 IEEE.

Item Type:	Conference Paper
Publication:	2019 IEEE Milan PowerTech, PowerTech 2019
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electric arcs; Electric equipment protection; Electric fault currents; Electric fault location; Electric furnace process; Electric furnaces; Electric power distribution; Electric transformer testing; Location; Power electronics; Smart meters, Capacitor switching; Current magnitudes; Distributed generator (DGs); Distribution systems; Electric arc furnace; High impedance fault; Power electronic loads; Transformer energization, Electric load distribution
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	23 Dec 2022 06:49
Last Modified:	23 Dec 2022 06:49
URI:	https://eprints.iisc.ac.in/id/eprint/78533

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