The KSSVC high-voltage static dynamic filter compensation device is composed of a thyristor controlled reactor (TCR) and a filter bank (FC). It is a compensation device that is connected in parallel to the power grid and dynamically adjusts the reactive power of the system according to the working state of the load. Applied to the power transmission system, it can improve the power transmission capacity of the grid, stabilize the system voltage, dampen the low frequency oscillation of the system and suppress the subsynchronous oscillation.