ABSTRACT
Microgrids are reliable, sustainable and flexible small-scale power systems. Modeling of sources of an MG is a preliminary step in understanding the dynamics of MG power systems. Microgrid energy sources (MGES) like wind turbine generators (WTGs) are subject to uncertainties in wind velocity. Moreover, communication delays in transmitting control signal scan add to the problem of uncertain power generation. These problems can cause frequency deviations and unintended islanding of an MG. Control architecture of an MG should be designed to minimize frequency deviations. As a solution to the control design problem, this chapter discusses the development of hierarchical and distributed controls and introduces a wind-speed-dependent controller to attain the desired operation of an MG. The performance of the controllers has been tested on a detailed model developed for an MG in response to wind speed variations and communication delays.
