Single-ended full-line quick-action protection method and system based on active boundary

The invention discloses a single-ended full-line quick-action protection method and system based on an active boundary, the active boundary is actively constructed by using the high controllability of power electronic equipment, a setting value is determined according to the protection sensitivity requirement, the boundary signal injection intensity and the home terminal protection detection capability, and when a fault occurs, the single-ended full-line quick-action protection method and system based on the active boundary are provided. The opposite-end active boundary actively injects a preset boundary signal according to the fault condition, and the home-end protection detects the signal sent by the active boundary; comparing an active boundary signal detected by local end protection with a set setting value, if the action requirement is met, performing protection action, otherwise, if the action requirement is met, performing protection action, and if the action requirement is not met, performing protecti