Evaporative cooling system of reactive compensation device

An evaporative cooling system of a reactive compensation device comprises a plurality of cooling assemblies (13) and a condenser (14). Each cooling assembly (13) comprises a plurality of thyristors (11), a damping resistor (12), a plurality of cold plates (21), at least one evaporation cooling radiator (24) and a cold fluid collection tube (23). One thyristor is clamped between every two cold plates, and the cold plates (21) are clamped with the thyristors (11) through fasteners. By means of the cold plates (21) and the cooling thyristors (11), the cold plates (21) are communicated with the evaporation cooling radiator (24) through a pipeline, the damping resistor (12) is arranged in an inner cavity of the evaporation cooling radiator (24), and evaporation cooling media in the evaporation cooling radiator (24) directly cool the damping resistor (12). The cold fluid collection tube (23) is communicated with the evaporation cooling radiator (24), the condenser (14) is arranged on the lateral face of the reactive compensation device, and the cooling assembly (13) is communicated with the condenser (14).