Abstract
This chapter discusses the effects of constant power loads ( CPLs) in DC-microgrids. Such loads are commonly observed in DC microgrids because of the extensive use of power electronic circuits to interface loads. As it is explained, due to their nonlinear nature, CPL creates a complex dynamic system that present two possible behaviors with an unstable equilibrium point unless power source convertor interfaces are properly controlled. In this chapter, both time domain and geometric control approaches that achieve stable equilibrium points in the presence of CPLs are explained. Passive approaches to compensate the destabilizing effect of CPLs are also discussed, but these approaches often lead to costly and bulky designs. Complex dynamics are also observed in rectifiers with CPLs, which often present excessively large output voltage variations.
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