Systematic study of impedance locus of distance protection in the vicinity of VSC HVDC converters

Leterme, Willem; Chaffey, Geraint; Loenders, Raf; Vermunicht, J.; Shoushtari, S. M.; Hertem, Dirk Van

doi:10.1049/icp.2022.0905

Cited by 2 publications

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“…Given a focus on the steady-state performance of the relay, calculations are performed using the routines described in [16], using open-source software for power-flow calculations [26].…”

Section: A Study Setup For Two-bus Networkmentioning

confidence: 99%

“…Consequently, protection function maloperations are likely to occur in a system with a large share of GCCs given that these either cannot (e.g., they cannot supply fault currents with the same magnitudes as synchronous machines) or do not deliver such fault currents (e.g, they can actively control the angle of injected currents or suppress negative sequence components, see for instance [15]). Given the non-linear nature of fault current injections, protection function maloperations in systems with a large share of GCCs are often case-and system-specific, e.g., as shown in [16], [17] for distance protections or [18] for negative sequence protection.…”

Section: Introductionmentioning

confidence: 99%

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Rethinking Power System Protection Analysis and Setting: Introducing Bayesian Analysis and Decision Theory

Leterme

Heylen²

2024

IEEE Trans. Power Delivery

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Reliability of future renewable-driven power systems may be compromised under present operation and planning paradigms. Given the identified failures of existing protection functions in the vicinity of grid-connected converters, protection function reliability will become an important factor in overall system reliability. Current protection analyses and suggested improvements offer practical insights for specific test systems, but fail to quantify protection performance. Therefore, this paper proposes a framework for probabilistic protection analysis and setting, to quantify the upper limit on protection function performance and steering protection performance to a desired reliability level. Four case studies are considered to demonstrate setting protections to achieve a desired system reliability, quantifying limits on protection function performance and tuning controllable fault current infeed for improving protection performance. Future work will focus on exploring additional insights in protection functions and application of the framework to more complex settings.

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“…Given a focus on the steady-state performance of the relay, calculations are performed using the routines described in [16], using open-source software for power-flow calculations [26].…”

Section: A Study Setup For Two-bus Networkmentioning

confidence: 99%