Differential Protection Sampling Alignment Without Fourier Timing

The patent extracts and eliminates the harmful Fourier transformation step from the sampling synchronization process. By removing the Fourier calculation and angling operations that introduce error currents, the method directly uses raw sampling data for differential protection, thereby maintaining fault detection accuracy while achieving sampling synchronization through alternative means.

The patent introduces an intermediary synchronization mechanism that does not rely on Fourier transformation. Instead of using Fourier-based angle correction, the method employs a direct synchronization approach that communicates timing information between devices without requiring the harmful intermediate Fourier calculation step, thus avoiding the introduction of error currents.

The patent implements preliminary synchronization actions by establishing timing relationships before full Fourier analysis is required. The method pre-synchronizes sampling moments using direct timing communication, allowing protection devices to be ready for immediate action without waiting for a complete Fourier transformation cycle, thereby reducing the protection delay.

The patent skips the time-consuming Fourier transformation step in the synchronization process. By rushing through to a direct synchronization method that uses timing information without requiring complete cycle analysis, the system achieves synchronization faster and enables quicker protection action.

The patent enables the protection devices to self-synchronize without requiring external time sources. Each device uses its own timing information and communicates directly with the other end, performing self-service synchronization that eliminates the need for external GPS or master clock systems, thereby reducing system complexity.

The patent extracts and removes the Fourier transformation operations from the synchronization system. By eliminating this complex mathematical processing step, the system becomes simpler while maintaining synchronization accuracy through direct timing communication methods.