Multi machine collaborative / layered control, event triggering/ frequency and voltage recovery

Multi machine collaborative control simulation of layered control, event triggering mechanism, frequency and voltage recovery secondary control for islanded microgrids
Keywords: layered control, frequency recovery, voltage recovery, event triggering, droop control, islanded microgrid, secondary control
1. The controller update mechanism is an event triggered mechanism that determines whether a measurement error has reached the event triggering condition (ETC) related to the norm of a function with a standard state
2. The primary control adopts droop control to simulate the droop external characteristics of synchronous generators. Based on the approximate value of microgrid inductance or the implementation of virtual impedance, linear relationships between voltage amplitude and reactive power, as well as frequency and active power, are specified in the droop characteristics. From the droop characteristics, it can be seen that as long as DG bears a certain load, a single control strategy will cause the voltage and frequency of the micro source to deviate from the rated values. Because of this, it is necessary to restore voltage and frequency through secondary control
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