Influence of Negative Sequence Injection Strategies on Faulted Phase Selector Performance

María Teresa Villén (), Maria Paz Comech, Eduardo Martinez Carrasco () and Aníbal Antonio Prada Hurtado ()
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María Teresa Villén: Infrastructure of Electric Grids Group, Fundación CIRCE, Parque Empresarial Dinamiza, Avenida Ranillas Edificio 3D, 1ª Planta, 50018 Zaragoza, Spain
Maria Paz Comech: Instituto Universitario de Investigación CIRCE (Fundación CIRCE—Universidad de Zaragoza), C/Mariano Esquillor 15, 50018 Zaragoza, Spain
Eduardo Martinez Carrasco: Infrastructure of Electric Grids Group, Fundación CIRCE, Parque Empresarial Dinamiza, Avenida Ranillas Edificio 3D, 1ª Planta, 50018 Zaragoza, Spain
Aníbal Antonio Prada Hurtado: Infrastructure of Electric Grids Group, Fundación CIRCE, Parque Empresarial Dinamiza, Avenida Ranillas Edificio 3D, 1ª Planta, 50018 Zaragoza, Spain

Energies, 2022, vol. 15, issue 16, 1-19

Abstract: Renewable power is expected to increase drastically in the coming years due to the energy transition. A large part of the newly installed generators will be connected to the power system through inverters and electronic converters, whose behaviour differs from the generators connected synchronously to the network. One of the main differences is the current contribution during symmetrical and asymmetrical faults which can affect protection systems. New grid codes establish requirements for fast current injection, but the converter’s maximum current limitations during faults make it difficult to establish control strategies for such current contribution. This paper studies the performance of faulted phase selector algorithm of a commercial relay under the current contribution from renewables before unbalanced faults. Two positive and negative sequence current injection strategies in compliance with new Spanish grid code requirements are proposed and tested under fault conditions in HiL (Hardware in the Loop). Test results show that the selected injection strategy affects the fault phase identification algorithm. Furthermore, the negative sequence injection requirements established in the new grid code improve the relay performance when line-to-line faults are applied, but they are not enough to identify all fault types.

Keywords: negative sequence injection; decoupled control structure; injection strategies; asymmetrical faults; fault phase selector algorithm; HiL; photovoltaic generator and type-IV wind turbine (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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