Fault-Tolerant Distributed Load/Frequency Coordination Strategies for Multi-Area Power MicroGrids

A parallel distributed fault-tolerant supervisory strategy is considered for addressing Load/Frequency set-point reconfiguration problems in multi-area power microgrids. Besides the ability to coordinate the power subsystems under nominal conditions, it is shown here that the scheme is capable of reconfiguring, to some extent and whenever necessary in response to unexpected load changes and/or faults, the current nominal equilibrium. This is achieved by changing the nominal set-points on frequency and power production in such a way that viable evolutions arise for the overall power system during the transients and a new post-fault sustainable equilibrium is reached. An example on a four-area power system is considered in order to demonstrate the effectiveness of the strategy.