Intermittent generator failures caused by such as equipment aging and poor contact may threaten the frequency stability of power systems. In this paper

an adaptive event-triggered load frequency control(LFC) scheme is proposed. First

considering that the consequence of a generator failure is that the active generation cannot reach the expected level

a series of operating scenarios are preset according to the degrees of failure. Then

this paper esablishes an adaptive event-triggered detector(ETD) is to upload the statuses and update the control parameters only when generator failure occurs or the LFC performance degrades below a preset threshold. Furthermore

considering that the synchronously matching between the control parameters and actual operation scenarios cannot be achieved due to the communication delays between ETD and control center

the LFC system under intermittent generator failures is described as an asynchronous switched model. Finally

based on the average dwell time technique

the control parameter design constraints and updating criteria have been deduced. Simulation results have shown that compared with traditional event-triggered schemes

the proposed method can improve the damping performance of area control errors by more than 15.16%.