Abstract: The embodiments of the present disclosure provide a differential relay protection apparatus, device, system, method, and storage medium. The differential relay protection apparatus includes: a clock module configured to create a first clock for the differential relay protection apparatus, the first clock is configured in a Precision Time Protocol domain, and create a second clock for the differential relay protection apparatus, the second clock operates independently of the first clock; a power data acquisition module configured to acquire power data collected based on the second clock; and a processing module configured to perform differential relay protection function by the first clock.