Abstract: The problem of secondary frequency recovery and active power distribution for AC microgrid

（MG）with bounded time delay were studied. A distributed dynamic event triggering control method was proposed

for distributed generator sets. The method used dynamic event triggering mechanism，which could greatly reduce

communication burden. Through the analysis of the system by the Lyapunov function，the sufficient conditions to

ensure the stability of the system，realize the asymptotic frequency recovery and active power distribution were

obtained. On the basis of this condition，the explicit tolerable upper bound for all time delays was obtained. The

upper bound could be used as a design guide in the planning stage of MG system，which improved the safety of realtime operation of the system. Finally，in order to verify the effectiveness of the proposed control method，an

experiment was carried out on the OPAL-RT real-time simulator based on DSP controller. The experimental results

verify the effectiveness and superiority of the proposed controller.

      Key words: dynamic event-triggered control；time delay；secondary frequency restoration；active power

distribution