  The ever-increasing use of renewable energy sources has underlined the role
of power electronic converters as an interface between these resources and the
power grid. One application of these converters is in three-phase inverters
utilized in a solar power plant to inject active/reactive power to the grid.
The dynamic model of power electronic converters is necessary for investigating
the overall system stability and the design of the controller for the
converters. Generally, the inverter dynamic model is needed to investigate the
dynamic behavior of inverters in different applications. This paper is a study
of the dynamical model of the grid-connected voltage source inverter, which is
extracted by the state-space averaging (SSA) method. This model is verified by
applying the values of the operating point to the inverter in Matlab Simulink
environment. To attain the steady-state operating point, the zero component of
the duty ratio of the converter is required. To obtain this component, the
matrix form of the converter's average equations is used. Overally, using the
above methods provides a more efficient and clear understanding of the dynamic
model of the converter.
