Voltage and frequency control with neutral current compensation in an isolated wind energy conversion system

This paper presents a voltage and frequency controller with neutral current compensation in an isolated wind energy conversion system employing a capacitor excited asynchronous generator (CEAG). In isolated applications, because of unavailability of the neutral point at the generator terminals, it is difficult to access the neutral wire from the source. In view of this, a transformer integrated with a voltage source converter (VSC) based voltage and frequency controller is used to provide the neutral terminal for the single phase consumer loads. A star delta transformer is used to provide the path for flow of the load neutral current. The complete standalone system is modeled and simulated for isolated wind energy conversion system in MATLAB using Simulink and power system blockset (PSB).

[1]  Bhim Singh,et al.  Harmonic elimination, reactive power compensation and load balancing in three-phase, four-wire electric distribution systems supplying non-linear loads , 1998 .

[2]  Felix A. Farret,et al.  Renewable Energy Systems: Design and Analysis with Induction Generators , 2004 .

[3]  F. Blaabjerg,et al.  Harmonic cancellation by mixing nonlinear single-phase and three-phase loads , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[4]  Hirofumi Akagi,et al.  Instantaneous power theory and applications to power conditioning , 2007 .

[5]  Ying Hua Han,et al.  Grid Integration of Wind Energy Conversion Systems , 2000 .

[6]  D. S. Carr,et al.  Battery energy storage technologies , 1993, Proc. IEEE.

[7]  G. D. Marques,et al.  A neutral current electronic compensator , 1998, IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200).

[8]  L.A.C. Lopes,et al.  Wind-driven self-excited induction generator with voltage and frequency regulated by a reduced-rating voltage source inverter , 2006, IEEE Transactions on Energy Conversion.

[9]  Ion Boldea,et al.  Variable Speed Generators , 2005 .

[10]  Prasad Enjeti,et al.  Analysis and design of a new active power filter to cancel neutral current harmonics in three phase four wire electric distribution systems , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[11]  Loi Lei Lai,et al.  Distributed Generation: Induction and Permanent Magnet Generators , 2007 .

[12]  K. C. Divya,et al.  Battery Energy Storage Technology for power systems-An overview , 2009 .