Synchronizer for power converters based on a limit cycle oscillator

摘要

The present invention presents a real-time synchronization system for power converters interconnected with the electrical network, whose operation is based on a structurally stable limit cycle oscillator and which develops pure sinusoidal trajectories, creating references free of harmonics and disturbances in network. The proposed invention has the advantage that it has a high degree of immunity and robustness within highly contaminated networks, either due to the presence of harmonics or other types of contamination that may exist in the network, with a better performance than the systems previously reported. Another advantage of the present invention is that regardless of the initial conditions that are established, the system always synchronizes with the signal of the network, guaranteeing a smooth transient from any initial condition to the limit cycle, so it does not require prior tuning. In addition, the proposed scheme does not require Phase-Locked Loop (PLL) or trigonometric functions for synchronization, thus reducing computational time and resources.