Chained static synchronous compensator

The utility model relates to a chained static synchronous compensator and belongs to the field of electric automation equipment. The chained static synchronous compensator comprises three conversion current chains, three filter reactors, three current-limiting resistors, one three-phase contactor and three filter capacitor branches. One ends of the three conversion current chains are connected together, the other ends of the three conversion current chains are connected to one ends of the three filter reactors, the other ends of the three filter reactors are connected to one ends of three groups of normally open contacts of the three-phase contactor, the other ends of the three groups of normally open contacts of the three-phase contactor are used as three-phase alternating current output ends of the chained static synchronous compensator, one ends of the three filter capacitor branches are connected to the three-phase alternating current output ends of the chained static synchronous compensator, the other ends of the three filter capacitor branches are connected together, and the three current-limiting resistors are respectively in parallel connection with two ends of the three groups of normally open contacts of the three-phase contactor. The chained static synchronous compensator achieves high voltage application and can adopt low-voltage-grade insulated gate bipolar translator (IGBT) devices, thereby being capable of reducing the number of H bridges in series and reducing device cost and volume.