The high-voltage TSC dynamic reactive power compensation device adopts an all-digital intelligent control system, and uses high-power thyristors in series to form a high-voltage AC non-contact switch, which can realize fast zero-crossing switching of multi-stage capacitor banks. High-voltage TSC dynamic reactive power compensation device response The time is less than or equal to 20ms, and the impact load and time-varying load can be monitored in real time and dynamically compensated to achieve the goal of power factor compensation above 0.9; at the same time, this product absorbs foreign advanced technology, which solves the problem of complicated voltage regulation and easy control switch in the existing compensation methods. It has the dual functions of dynamically compensating reactive power and stabilizing system voltage due to the disadvantages of impact and short service life, and its technical level is domestically leading. At the same time, the product has the characteristics of significantly reducing network loss, saving electric energy, and improving power supply quality, which can bring huge economic and social benefits to users.