Dynamic capacity adjusting electric reactor for filtering compensation device

The invention discloses a dynamic capacity adjusting electric reactor for a filtering compensation device. The dynamic capacity adjusting electric reactor for the filtering compensation device comprises a main coil, an auxiliary coil, a switch device, an optical fiber and a controller, wherein the auxiliary coil is connected with the switch device; the switch device is connected with the controller through the optical fiber; the controller outputs corresponding switch signals to the switch device according to a target capacity value, which is required to be adjusted, of the electric reactor; and the switch device generates current which is required to be outputted by the filtering compensation device under the control of the switch signals and outputs the current to the auxiliary coil, so that the capacity of the electric reactor is adjusted. Because the target capacity value, which is required to be adjusted, of the electric reactor corresponds to the current which is required to be outputted by the filtering compensation device, and the current generated by the switch device can be adjusted in a stepless manner according to the corresponding switch signals outputted by the controller, the capacity of the electric reactor can be dynamically adjusted in a stepless manner. The dynamic capacity adjusting electric reactor is not limited by the number of taps; the adjusting precision is high; and a high filtering effect of the filtering compensation device can be achieved.