DANTAS, N. K. L.; http://lattes.cnpq.br/4215806208827252; DANTAS, Nicolau Kellyano Leite.
Resumo:
In electrical energy generation systems based on primary sources, such as wind or photovoltaic
energy, static power converters are commonly used to connect directly to the
electrical grid. These converters are responsible for the energy processing, adjusting it
and delivering to the electrical grid. In order to get the converters to have satisfactory
performance, these converters must be well projected and precisely controlled. When it
refers to controlling, the synchronization in a three-phase system is very important to safe
and well-performed operation in grid connected applications. The most used techniques in
three-phase synchronization are based on PLL’s. In this academic work, it is presented a
detailed study about different PLL structures that are based on coordinate transformation
concepts to detect and track the frequency and the phase angle of the three-phase system
voltages or electrical currents. Simulation results in ideal and non-ideal conditions are
presented in order to analyze the behavior of each PLL structure in different conditions
to which the grid may be submitted.