Seminario N° 73
A Robust PLL Algorithm to Synchronize Static Power Converters with Polluted AC Systems
El señor Cristian A. Sepúlveda V., alumno de doctorado, realizará su segunda exposición consecutiva titulada "A Robust PLL Algorithm to Synchronize Static Power Converters with Polluted AC Systems". La exposición se llevará a cabo el Jueves 02 de Noviembre a las 16:00 horas en las dependencias del LCDA.
A Phase Locked Loop algorithm appropriated for DSP-based control implementations
where the operation of a static power converter needs to be synchronized with an AC
network is presented. The operating principle of the proposed algorithm includes a
multiplier, a filter, a feedback closed loop, and a Voltage Controlled Oscillator (VCO)
stage. As a result, a discrete sine (and cosine) signal is generated in perfect
synchronism with the fundamental component of an external reference signal.
Moreover, the sampling period of the algorithm is adjusted at each sampling instant
such that an integer number of sampling periods is ensured per period of the external
reference signal. This is mainly achieved by using an improved discrete rectangular
window filter and a discrete controller. The algorithm code is simple, stable, and
presents high noise rejection. The theoretical justification and various experimental
tests are included.