Seminario nº63 A Robust PLL Algorithm to Synchronize Static Power Converters with Polluted AC Systems El profesor José E. Espinoza C., fundador de nuestro prestigioso laboratorio, expuso el 22 de junio la versión final de "A Robust PLL Algorithm to SynchronizeStatic Power Converters with Polluted AC Systems", el cual fue desarrollado por Marcelo Pérez L. durante el verano de 2006. Esta investigación fue uno de los trabajos aceptados en el IECON 2006. 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 are ensured per period of the
external reference signal. This is mainly achieved by using an improved discrete rectangular
window filter and a discrete PI controller. The algorithm code is simple, stable, and presents high
noise rejection. The theoretical justification and various experimental tests are included. |