A New Robust Experimentally Validated Phase Locked Loop for Power Electronic Control

Abstract P.L.L is one of the circuits frequently used in control in power electronic, such as in active power filters. Its first role in electronic applications, is to identify the frequency (or the angular position) of a periodical signal, in order to generate another signal synchronised with the last one. However, many power applications need a perfect sine signal phase locked to the utility voltages. As the utility voltages are not always sinusoidal and balanced, a P.L.L is used in order to extract its fundamental component. In this paper, a classical P.L.L with all mathematical development confirmed by simulations will be first studied. Then a new robust solution, which provides very good results under unbalanced and distorted voltages, will be proposed. Simulations, validated by experimentations, will confirm the proposed design. An application case will be studied in order to illustrate the performances of this new P.L.L.

[1]  S.-K. Chung,et al.  Phase-locked loop for grid-connected three-phase power conversion systems , 2000 .

[2]  Pascal ACCO.  Using an Event-Driven Model to Optimise Charge Pump Phase Locked Loops , 2001 .

[3]  Y. Komatsu,et al.  A control method of active power filter in unsymmetrical voltage system , 1997, Proceedings of Second International Conference on Power Electronics and Drive Systems.

[4]  Frank C. Hoppensteadt,et al.  Pattern recognition via synchronization in phase-locked loop neural networks , 2000, IEEE Trans. Neural Networks Learn. Syst..

[5]  Hirofumi Akagi,et al.  The theory of instantaneous power in three‐phase four‐wire systems and its applications , 2001 .

[6]  Seyed-Hamid Shahalami,et al.  Filtrage hybride des perturbations harmoniques produites par des systèmes d'entraînement asynchrone à vitesse variable , 2001 .

[7]  Hirofumi Akagi,et al.  Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components , 1984, IEEE Transactions on Industry Applications.

[8]  D. J. Adams,et al.  Harmonic and reactive power compensation based on the generalized instantaneous reactive power theory for three-phase four-wire systems , 1998 .

[9]  Hong-Seok Song,et al.  Dual current control scheme for PWM converter under unbalanced input voltage conditions , 1999, IEEE Trans. Ind. Electron..

[10]  Fang Zheng Peng,et al.  Reactive power and harmonic compensation based on the generalized instantaneous reactive power theory for three-phase power systems , 1996 .

[11]  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).