Method for testing back-up power supply of wind generating set

The invention discloses a wind generating set back-up power supply test method, which comprises the following steps of: 1, judging whether the power supply type of a local machine is a storage battery or not when the last back-up power supply test time is up to a back-up power supply test period through fan detection; 2, if yes, performing the step 3; otherwise, setting the test mark, waiting for the next starting, performing the power supply test, and ending; 3, setting a test mark; 4, sending a back-up power supply test request to the monitoring software, and carrying out whole-field fan test queue sorting by the monitoring software; 5, the monitoring software outputs a test instruction to the current to-be-tested fan through the main control software; 6, after the to-be-tested fan receives the test instruction, the to-be-tested fan is shut down for backup power supply test; 7, performing a stack-out operation, and deleting the test request of the fan from the queue; and 8, carrying out the step 5 again unt