An overview of grid fundamental and harmonic components detection techniques

The problem of grid fundamental component detection has intrigued many researchers due to its importance in the grid synchronization operation of grid-interfacing power electronics. The problem of harmonic detection is also a popular topic for the design of harmonic compensation devices. The existing techniques for the two problems often share some sort of similar methodology, because the fundamental component is essentially a harmonic in a wide sense. This paper reviews both problems, the techniques to solve them, and their advantages and limitations. The discussed literature and their methodology may provide a good source of information for further research work in this field.