A DFT-based Phasor Estimation Method for Power Electronics Converter Control and Protection under Strong Grid Voltage Perturbations

• Type: Article in International Scientific Journal
• Date: 2009

Authors

António Pina Martins (Author) FEUP

Journal

Title: European Transactions on Electrical Power

Vol. 19 No. 8

Pages: 1082-1097

ISSN: 1430-144X

Publisher: John Wiley & Sons

Indexing

ISI Web of Knowledge - 4 Citations

ISI Web of Science

Scopus - 3 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

CORDIS: Technological sciences > Engineering > Electrical engineering ; Technological sciences > Engineering > Control engineering > Automation

Other information

Authenticus ID: P-003-EMA

DOI: 10.1002/etep.284

Abstract (EN): Power conditioning systems like active filters, universal power flow controllers, static compensators, and dynamic voltage restorers, among other ones, need accurate synchronization circuits capable of dealing with very different grid voltage perturbations. The DFT algorithm is one of best performers in phasor estimation, but is not perfect. The paper accurately describes the DFT errors under frequency variation, decaying DC components and harmonics, and analyzes the instantaneous phasor estimation, with absolute and recursive algorithms. Strong grid voltage perturbations, occurring in weak grids, especially in the grid connection of renewable energies, demand for a DFT-based robust estimation method. The proposed method, as demonstrated by extensive simulations, is capable of handling general grid voltage perturbations, imposing a compromise between dynamic response and accuracy. Also, its advantage over two other frequently used methods is demonstrated by comparative results.

Language: English

Type (Professor's evaluation): Scientific