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Phase Locked Loop PLL - Identification of the Instantaneous grid angle

Phase Locked Loop PLL - Identification of the Instantaneous grid angle

4 Enrollments Level : Advanced

Relevance

Phase-Locked Loops (PLL) are control systems that synchronize an output signal's phase and frequency with those of an input signal. PLLs are widely used in communications, signal processing, and power electronics and are versatile and essential components in modern electronic systems, enabling precise control of frequency and phase in a wide range of applications from communications to power systems.

Abstract

This section covers the Phase Locked Loop (PLL) and its in identifying the instantaneous grid angle θ. It explains the purpose of a PLL, detailing its input and output quantities and how it integrates into the overall system. The discussion includes both three-phase and single-phase implementations, providing insight into their applications and benefits. An outlook section offers perspectives on future advancements and potential developments in PLL technology.

Learning Outcomes

Students

  1. have a clear understanding of the functionality and the purpose of a PLL

  2. can implement PLL structures in simulations

  3. can implement PLL structures as code

in order to

  1. be enabled to apply PLL routines for grid connected applications

  2. design and test single- and three-phase grid-voltage detections

  3. to be enabled for step-by-step implementation including debugging steps

Prior Knowledge

1.           Inverter Leg Operation, Controller Interaction and Protection Features

2.           H-Bride Operation

3.           Basics on three-level converters

Keywords

Elements

1. About this Building Block

About this Building Block

08-PLL.pdf

2. Exercises

Exercises

08-PLL-Exercises.pdf

3. Simulations

Simulations

08-Exercise2-PLL.plecs
08-Exercise2-PLL-solution.plecs
08-Exercise2-PLL-solution-block.plecs
08-Exercise2-PLL-solution-both.plecs
08-Exercise2-PLL-solution-Coded.plecs
08-Exercise3-PLL-solution-SinglePhaseSOGI-PLL.plecs

4. Self-assessments

Self Assessment

08-PLL-SelfAssessment.pdf

Suggested Building Block