Dry-type capacitor test method for flexible direct-current converter valve

The invention belongs to the technical field of flexible direct-current power transmission, and relates to a dry-type capacitor test method for a flexible direct-current converter valve, and the method comprises the steps: carrying out the alternating-current and direct-current superposition durability test for a to-be-detected dry-type capacitor, and obtaining a durability test result; for the to-be-detected dry-type capacitor, carrying out an ultimate withstand voltage test between terminals to obtain a withstand voltage test result; for the to-be-detected dry-type capacitor, carrying out a two-section impact discharge test to obtain a discharge test result; and determining the performance of the to-be-detected dry-type capacitor based on the endurance test result, the withstand voltage test result and the discharge test result, and obtaining a performance test result. According to various actual operation conditions of the dry-type capacitor for the flexible direct-current converter valve, a test assessmen