Decoupled Double Synchronous Reference Frame PLL for Power Converters Control
Location: Brazil
Publication date: 2005-06-18
Published in: IEEE Transactions on Power Electronics, March 2005
ref. DOI: 10.1109/TPEL.2006.890000

Local members

Jose Ignacio Candela

PhD. Senior Researcher. Project Responsible

External members

Pou, J. , Bergas, J. , Burgos, R. , Boroyevich, D.



This paper deals with a crucial aspect in the control of grid-connected power converters, i.e., the detection of the fundamental-frequency positive-sequence component of the utility voltage under unbalanced and distorted conditions. Specifically, it proposes a positive-sequence detector based on a new decoupled double synchronous reference frame phase-locked loop (DDSRF-PLL), which completely eliminates the detection errors of conventional synchronous reference frame PLL's (SRF-PLL). This is achieved by transforming both positive- and negative-sequence components of the utility voltage into the double SRF, from which a decoupling network is developed in order to cleanly extract and separate the positive- and negative-sequence components. The resultant DDSRF-PLL conducts then to a fast, precise, and robust positive-sequence voltage detection even under unbalanced and distorted grid conditions. The paper presents a detailed description and derivation of the proposed detection method, together with an extensive evaluation using simulation and experimental results from a digital signal processor-based laboratory prototype in order to verify and validate the excellent performance achieved by the DDSRF-PLL


Associated projects

National public