Self-locking method and device for high-voltage direct-current circuit breaker

The invention discloses a self-locking method and device for a high-voltage direct-current circuit breaker, relates to the technical field of direct-current circuit breaker control, and mainly aims to accurately calculate self-locking time under different working conditions and improve the availability of the high-voltage direct-current circuit breaker. According to the main technical scheme, the method comprises the steps of collecting target data based on an opening instruction, and calculating first absorption energy by using a preset energy consumption branch absorption energy calculation rule; judging whether second absorption energy is calculated or not according to a preset judgment rule; if yes, collecting the target data again, calculating second absorption energy by using a preset energy consumption branch absorption energy calculation rule, and summing the first absorption energy and the second absorption energy to obtain total absorption energy; if not, determining the first absorption energy as t