Event trigger load frequency control based method of multi zone interconnected power system

The invention discloses an event trigger load frequency control-based method of a multi-zone interconnected power system. The method comprises the steps of (1) building a mathematical model for load frequency control of a multi-energy power system; (2) researching an even trigger condition design of the load frequency control of the multi-zone interconnected power system on the basis of an event trigger mechanism; and (3) designing an event trigger-based controller. The system directly enters a sliding mode state from the beginning and a sliding mode exists in the overall control system; and for a sliding mode control system, after the system enters the sliding mode state, the dynamic property of the system is completely determined by the sliding mode state. The control method has the desired dynamic characteristic and has complete robustness on change of system parameters and external disturbance; and buffeting is eliminated. Due to use of the event trigger mechanism, the multi-energy power system can effectively inhibit dynamic frequency deviation and dynamic deviation of tie-line power and effectively reduce the network bandwidth occupancy.