Autonomous control strategies for On-Load Tap-Changer automatic voltage control relays

摘要

On-Load Tap-Changer Transformers (OLTCT) provide a well established method for controlling the voltage on supply networks. Their associated automatic voltage control relays (AVC) include a selection of features to ensure that they enable the voltage to be controlled at a nominal supply point rather than just the transformer terminals and avoid complications when transformers are operated in parallel.