Control system for improving frequency support capability of wind turbine generator set by super capacitor

The invention discloses a control system for improving the frequency support capability of a wind turbine generator set by a super capacitor. The system comprises a wind wheel, a gear case, a generator, a converter, a crowbar protection, a box transformer substation and the super capacitor, wherein the wind wheel, the gear case, the generator, the converter and the crowbar protection are orderly connected with one another; the box transformer substation is connected with a power grid; the super capacitor is added to a DC bus of the converter; the super capacitor is connected with the DC bus of a wind turbine converter through a DC/DC converter; and the super capacitor can carry out ordered charging and discharging and maintain the operating conditions according to the operating state of the wind turbine generator set, and has relatively good reliability.