Details

Autor(en) / Beteiligte

• Reyes, M.
• Rodriguez, P.
• Vazquez, S.
• Luna, A.
• Teodorescu, R.
• Carrasco, J. M.

Titel

Enhanced Decoupled Double Synchronous Reference Frame Current Controller for Unbalanced Grid-Voltage Conditions

Ist Teil von

• IEEE transactions on power electronics, 2012-09, Vol.27 (9), p.3934-3943

Ort / Verlag

New York, NY: IEEE

Erscheinungsjahr

2012

Link zum Volltext

• Volltext

Quelle

IEEE Xplore / Electronic Library Online (IEL)

Beschreibungen/Notizen

• In the last few years, restrictive grid codes have arisen to ensure the performance and stability of electrical networks, which experience a massive integration of renewable energy sources and distributed generation systems that are normally connected to the grid through electronic power converters. In these codes, the injection of positive- and negative-sequence current components becomes necessary for fulfilling, among others, the low-voltage ride-through requirements during balanced and unbalanced grid faults. However, the performance of classical dq current controllers, applied to power converters, under unbalanced grid-voltage conditions is highly deficient, due to the unavoidable appearance of current oscillations. This paper analyzes the performance of the double synchronous reference frame controller and improves its structure by adding a decoupling network for estimating and compensating the undesirable current oscillations. Experimental results will demonstrate the validity of the proposed decoupled DSRF controller.