TY - RPRT TI - Variable frequency response testbed to validate protective relays up to 20 kHz☆ AU - Piesciorovsky, Emilio C. AU - Karnowski, Thomas PY - 2021 DO - 10.1016/j.epsr.2021.107071 UR - https://www.osti.gov/biblio/1766424 ID - 1766424 ER -