New Phase-Segregated Digital Busbar Protection Solutions

摘要

Simple busbars with dedicated Current Transformers (CTs) could be efficiently protected by the high-impedance principle - a fast and reliable scheme with tens of years of excellent field record. However, new power generation added recently, or to be added in the near future, complicates historically simple busbar arrangements and exposes existing CTs to saturation due to increased fault current level. New substations are often designed to satisfy cost requirements rather than keep the protection task straightforward and easy. This results in complex busbar arrangements.