Series compensation transformer protection circuit, equipment and control method thereof

The invention discloses a series compensation transformer protection circuit, equipment and a control method thereof, and belongs to the technical field of circuit protection. The series compensation transformer protection circuit comprises a series compensation circuit, a protection unit and a controller; the protection unit comprises a thyristor contactor; the series compensation circuit comprises a transformer, an inverter unit and a load, the transformer is respectively connected with the inverter unit and the load, the inverter unit is connected with the load, and a thyristor in the thyristor contactor is arranged on a circuit where the inverter is connected with the load; the controller is used for controlling the thyristor to close the contactor when the voltage output by the transformer is greater than a safe working voltage threshold value of the inversion unit or the current output by the transformer is greater than a safe working current threshold value of the inversion unit; and when the voltage o