PLL structures for utility connected systems

This paper presents a detailed analysis of PLL structures for utility connected systems. The three-phase PLL (phase-locked loop) structure capable of fast tracking the utility voltage vector is studied. A single-phase PLL structure, derived from the three-phase PLL topology, is discussed and its behavior under distorted utility conditions is analyzed. Additionally, the conventional zero-crossing PLL is studied and an alternative implementation for this PLL is proposed in order to improve its dynamic behavior. Simulation and experimental results from a DSP-based system are included to support the theoretical analysis.

[1]  Guan-Chyun Hsieh,et al.  Phase-locked loop techniques. A survey , 1996, IEEE Trans. Ind. Electron..

[2]  S.M. Silva,et al.  Wide bandwidth single and three-phase PLL structures for grid-tied PV systems , 2000, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036).

[3]  Seung-Ki Sul,et al.  A new phase detecting method for power conversion systems considering distorted conditions in power system , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[4]  V. Blasko,et al.  Operation of a phase locked loop system under distorted utility conditions , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[5]  K. Nam,et al.  An instantaneous phase angle detection algorithm under unbalanced line voltage condition , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).