Sensitivity of Dynamic Mho Characteristic to PLL Parameters of Grid Following PV

Meenu Jayamohan, Sarasij Das, Marjan Popov

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

The restructuring of the power system by replacing Synchronous Generators (SGs) with Inverter-Based Resources (IBRs) has resulted in a drastic change in power system dynamics. Positive Sequence Memory Polarized (PSMP) mho elements have been used to ensure the reliable operation of mho relays during close-in bolted faults. The use of memory voltage for polarization of the mho element causes dynamic expansion of the mho characteristics. In an SG-only system, the memory polarization-induced dynamic expansion of these mho characteristics helps to increase the resistive reach. However, as the integration of IBRs increases, the dynamic mho expansion will be affected due to the different fault characteristics of IBRs. Most IBRs currently integrated into the power system are Grid-Following (GFOL) type, which uses Phase-Locked Loops (PLL) for synchronization. The variations in control parameters and bandwidths of the PLLs used in the GFOL IBRs may also affect the dynamic mho expansion. The studies presented in this paper demonstrate the impact of different types of PLLs and their control parameters on the dynamic expansion of PSMP mho relays. For this analysis, a modified IEEE-39 bus system with a GFOL Photovoltaic (PV) generator is used. The PV s have Voltage Support (VS), Low Voltage Ride-Through (LVRT)/ High Voltage Ride-Through (HVRT) features and comply with IEEE 2800–2022 standard.
Original languageEnglish
Title of host publicationProceedings of the 2024 IEEE International Communications Energy Conference (INTELEC)
PublisherIEEE
Number of pages6
ISBN (Electronic)979-8-3503-7057-7
ISBN (Print)979-8-3503-7058-4
DOIs
Publication statusPublished - 2024
Event 2024 IEEE International Communications Energy Conference (INTELEC) - Bengaluru, India
Duration: 4 Aug 20247 Aug 2024

Conference

Conference 2024 IEEE International Communications Energy Conference (INTELEC)
Country/TerritoryIndia
CityBengaluru
Period4/08/247/08/24

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Dynamic mho expansion
  • Memory polarization
  • PV generator

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