Performance of Memory-Polarized Distance Relay in Presence of PV Generator with Vdc - Q Control

Radhakrishnan, A and Ghosh, A and Priyamvada, IRS and Das, S (2022) Performance of Memory-Polarized Distance Relay in Presence of PV Generator with Vdc - Q Control. In: 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022, 9 - 13 October 2022, Detroit.

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Abstract

This paper presents novel results associated with the impact of PV generator controls on the distance protection. Memory voltage polarization of mho element leads to dynamic expansion of the mho circle. This dynamic expansion increases the resistive reach of the mho element in transmission networks powered by synchronous generators. As the share of converter-interfaced PV generators grows at grid level, the converter control of PV generators starts to influence the performance of the memory-polarized distance relays. This paper presents an elaborate study on the impact of Vdc - Q control-based PV generators on the dynamic expansion of positive sequence memory-polarized (PSMP) mho distance element characteristics. Simulations have been performed on the benchmark IEEE-39 bus system to which additional PV generators are connected. The PV generators are facilitated with Low Voltage Ride Through (LVRT) capability. Performances of the PSMP mho characteristics during Zone 1 forward faults and Zone 3 reverse faults have been analyzed. The results indicate that during forward faults, there is a possibility of considerable reduction in the resistive coverage of the PSMP mho distance element. This may lead to incorrect operation of the distance relay in the presence of a fault resistance. It is also observed that the PSMP mho distance element may fail to operate if the fault is in the reverse portion of Zone 3. Explanations have been provided to describe the influence of converter control of PV generators on the dynamic expansion of the PSMP mho distance element. © 2022 IEEE.

Item Type:	Conference Paper
Publication:	2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electric equipment protection; Electric power system protection; Electric power transmission; Electric power transmission networks; Expansion; Polarization, Distance protection; Distance relay; Dynamic expansion; Dynamic mho; Memory polarization; Performance; PV generators; Q-control; Sequence memory; Vdc - Q control, Relay protection
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	25 Jan 2023 10:02
Last Modified:	25 Jan 2023 10:02
URI:	https://eprints.iisc.ac.in/id/eprint/79510

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