A synchronization technique for single-phase grid applications

The utility grid disturbances like dc offset and harmonic components can severely affect the estimated variables from phase-locked loop (PLL), resulting in poor performance of system relying on it. Therefore, there is an emerging need for well-designed PLL algorithms ensuring robust response against different operating conditions. This paper proposes a simple single-phase algorithm with inherent specific orders rejection capability. Utilizing adaptive time-delay fictitious signal generation. A full mathematical model proposed has been provided. compared other filter-based PLLs, to validate its simplicity excellent performance.