Propuesta metodológica para la protección de distancia en líneas de transmisión ante la integración de energías renovables no convencionales

M. F. Velasco; Génesis Maliza Paladines; Fernando Vaca-Urbano

doi:10.17163/ings.n30.2023.09

M. F. Velasco

Escuela Superior Politécnica del Litoral

https://orcid.org/0000-0001-6676-591X
Génesis Maliza Paladines

Escuela Superior Politécnica del Litoral

https://orcid.org/0000-0002-6466-619X
Fernando Vaca-Urbano

Escuela Superior Politécnica del Litoral

https://orcid.org/0000-0002-7207-1284

Abstract

This paper presents a methodology to set the distance protection (ANSI-21) in power systems that integrate nonconventional renewable energies (NCRE). The modified IEEE 9-bar New England system is used as a case study, with a wind farm comprising 33 2.5 MW wind turbines and control systems validated according to international standards, such as the IEC60909-2016. A fault resistance value calculated using the Warrington method is considered. The proposed settings are simulated using the Digsilent Power Factory® software and a Siemens 7SA522 relay with quadrilateral characteristics. The methodology uses voltage and current data from the instrumentation transformers to calculate the line impedance up to the fault point. The proposed adaptive method demonstrates positive performance under different shortcircuit scenarios, where the fault location, fault resistance, and power fluctuations of generating park are varied. This indicates that the relay effectively operates in the appropriate protection zone.

Keywords

Protección de distancia, característica cuadrilateral, parque eólico, resistencia de falla, fuentes basadas en inversores Distance protection, adaptive relay, adaptive quadratic characteristic, wind farms, fault resistance, inverter-based sources

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