High voltage ride through device and method, wind power converter, and wind turbine set

Abstract

A high voltage ride through (HVRT) device and method, a wind power converter, and a wind turbine set. The HVRT device comprises: an unloading module (), which comprises a brake module () and a first switching element () that form a series connection with one another, and which is configured to discharge energy when a HVRT occurs; a controller (), which is configured to detect a direct current (DC) bus voltage so as to control the first switching element () to be turned on when a HVRT occurs and the DC bus voltage is greater than a first threshold and less than or equal to a second threshold, such that the brake module () inputs and discharges energy; and a passive driving circuit (), which applies a turn-on signal to a control terminal of the first switching element () by using the DC bus voltage in response to the DC bus voltage being greater than the second threshold, such that the brake module () inputs and discharges energy.