Active and reactive power sharing control strategy for VSGs in microgrid considering the different capacities of distributed energy resources

An Adaptive Droop Control Strategy for Islanded Microgrid Based on Improved Particle Swarm Optimization

“…Considering the proportional allocation of active and reactive power, bus voltage fluctuation and frequency oscillation, this paper designs a fitness function for IPSO proposed above. Since the output power of the DG is inversely proportional to the droop coefficient [41], [42], the algorithm can be used to appropriately adjust the droop coefficient in order to reasonably allocate power according to the DG capacity.…”

Effects analysis of excitation circuit on power control for VSG: a design‐oriented study

“…It has been proved that VSG control not only inherits the advantages of droop control, but also has larger inertia and better frequency stability performance than droop control [10]. Large amounts of investigations related to VSG can be found in [11][12][13][14][15][16][17][18][19][20][21].…”

“…There are various SG models that have been utilised in VSG [11][12][13][14][15]. Cvetkovic et al [11] restructure the well known machine model to resemble widely used power converter, dynamic model.…”

“…The classical three-order SG model is improved for VSG in [12], but the system modelling and analysis are lacking. Moreover, many extremely simplified SG models eliminating the electromagnetic transformation and other parts are proposed, but those models deviate from the original characteristics of SG [13][14][15]. Therefore, to study the VSG mechanism in-depth, the simplification of SG model needs to be concerned.…”

“…The excitation circuits in VSG are commonly emulated by proportional controller-based, integral controller-based, PI controller-based, or polynomial-based controls [13][14][15]20]. Alternatively, there is another idea to establish the excitation circuit by using the conventional SG models.…”