Design and Operation of a Phase-Locked Loop with Kalman Estimator-Based Filter for Single-Phase Applications

This paper describes the design procedure of a phase-locked loop (PLL) preceded by a Kalman estimator-based filter. It provides a highly accurate and fast estimate of the grid frequency and phase angle in grid-connected power electronic applications. Moreover, it enables the transformation to the rotational dq frame for various control purposes. Closed-form… CONTINUE READING

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