Control system for combination of dynamic reactive power compensator and AVC

The utility model relates to a control system for combination of a dynamic reactive power compensator and AVC. In the system, when a system voltage suddenly raises or suddenly reduces to values exceeding an upper limit value or a lower limit values, quick response and voltage regulation of a dynamic reactive power compensator can be fully played, the control authority can be switched on the spot, that is the dynamic reactive power compensator carries out constant voltage control to regulate the system voltage within a limit range. When the system recovers in an allowable value range, the system is controlled by the AVC again, the system carries out instruction from the AVC. For avoiding repeatedly switching between two authorities which are the dynamic reactive compensation on-spot control and the AVC, a voltage dead zone DV is added based on the voltage upper/lower limit, the present control authority will not be changed when the voltage is in the voltage dead zone. By adopting the control system for the combination of dynamic reactive power compensator and the AVC, a control object between the dynamic reactive power compensator SVC and the AVC can be switched.