A Digital Frequency Adaptive Synchronization Unit for On- and Off-Grid Systems

Robust support vector machine‐based zero‐crossing detector for different power system applications

“…Finally, because grid synchronisation is a major application of ZC detection, a comparative study of the proposed ZC detection technique with other state-of-the-art grid synchronisation methods was carried out, as presented in Table 1. The data on the other grid synchronisation techniques shown in Table 1 are obtained from [11] and hence the simulation conditions are not similar. The response time of the proposed system after implementation was found to be 14.4 µs.…”

“…Hence, the findings suggest that the proposed method can be suitably incorporated into the digital control of various processes included in the ever-expanding electrical power systems. [20] 40-60 40 ms N/P E-PLL [21] 30-90 50 ms 5 FRF-PLL [22] 38-62 50 ms 15 SOGI-QSG [23] 0.05-100 11-23 ms N/P MDSOGI-FLL [24] 40-60 40-60 ms 5 LES PLL [25] N/P 40 ms 10 T/4 DELAY PLL [26] 49-51 100 ms 0.8 FASU [11] 40-2000 30 ms 80 proposed method 49-51 100 µs 1…”

“…This issue has not been adequately addressed because very little research work on this subject has been carried out. In [10,11], the authors developed an adaptive sample rate FIR filter-based ZC detection technique that addressed the problem of harmonic distortion. However, in the current age of digital control, the aspect of signal noise introduces a substantial error into the system [9].…”