Event-triggered Frequency Coordination Control of Off-grid Microgrids Based on Improved Consistency Algorithm

In order to improve the stability of event triggered off grid microgrids, a frequency coordination control method for event triggered off grid microgrids based on an improved consistency algorithm is proposed. A dual layer correction mechanism was constructed based on an improved consistency algorithm, achieving coordinated optimization of voltage recovery and current sharing. Taking into account factors such as frequency deviation, construct the objective optimization function for the frequency coordination controller. The supercapacitor grid connected inverter is used to quickly respond to frequency difference signals and use the frequency error during triggering as a secondary control compensation value to allocate active power reasonably. The event triggered control strategy is used to optimize the objective function and achieve layered coordinated control of event triggered off grid frequency. The experimental results show that the triggering time of the design method in scenario 1 is highly consistent with the actual situation, with a deviation of $\pm 1.2 \mathrm{~ms}$. In scenario 2, when communication is interrupted, the frequency fluctuation is $\pm 0.12 \mathrm{~Hz}$, and the recovery time is 1.8s, effectively ensuring the stable operation of the off grid microgrid.