Recent researches show the importance of modeling and control the DC/DC and DC/AC power converters in order to obtain proper-islanded microgrids or safe connection of different generation sources to the utility grid. The control needs arise because the high penetration of the low scale generation may produce frequency and voltage deviations from desired levels. In this context, this paper develops a model of distinct power converters and proposes a decentralized control strategy to regulate the frequency and voltage in a microgrid with different generators and loads. Simulations show the application of the control strategy in a simple microgrid model with the evaluation of every control stage in the grid.