Periodic signal tracking based on zero-pole cancelation with application to inverter

A technique is developed to accomplish tracking of periodic signals with zero phase errors. The class of problems is characterized by lightly damped modes. The presented technique is firstly illustrated on first order systems, for a periodic signal. The technique is then illustrated on standard second order systems. A general formulation is posed for the design of time-delay filters for tracking periodic signals for minimum phase systems. Finally, a single-phase inverter system is used to illustrate the potentiality of the proposed technique.