Vector Control of Front-End Converters for

This paper presents a novel power-balance control method for a wind-diesel generation feeding an isolated grid. The system is based on a variable-speed wind energy conversion system (WECS) connected to an ac load using a power converter. An energy storage system (ESS), connected to the ac load using an additional converter, is used to balance the power generated by the WECS with the load. In this paper, the vector control systems for both interfacing power converters are discussed; the control uses the WECS converter to regulate the ac load voltage and the ESS converter to regulate the power flow to achieve a power balance. A small signal model is used to design the control systems. Finally, the proposed control is implemented in a 2-kW experimental prototype and the experimental results are fully analyzed and discussed in the paper.

[1]  W. E. Leithead.  Dependence of performance of variable speed wind turbines on the turbulence, dynamics and control , 1990 .

[2]  R. Cardenas,et al.  Sensorless vector control of induction machines for variable-speed wind energy applications , 2004, IEEE Transactions on Energy Conversion.

[3]  Robert E. Hebner,et al.  Flywheel batteries come around again , 2002 .

[4]  O. Ojo,et al.  Concise modulation strategies for four-leg voltage source inverters , 2004, IEEE Transactions on Power Electronics.

[5]  R. Jones,et al.  Application of a power-controlled flywheel drive for wind power conditioning in a wind/diesel power system , 1999, IEMDC 1999.

[6]  J.C. Clare,et al.  Control strategies for voltage control of a boost type PWM converter , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[7]  Eduard Muljadi,et al.  Pitch-controlled variable-speed wind turbine generation , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[8]  Roger Dettmer.  Revolutionary energy-a wind/diesel generator with flywheel storage , 1990 .

[9]  Zhe Chen,et al.  A hybrid generation system using variable speed wind turbines and diesel units , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[10]  Robert Ashley Gannett,et al.  Control Strategies for High Power Four-Leg Voltage Source Inverters , 2001 .

[11]  L. Garcia-Tabares,et al.  Design and simulation of a stand-alone wind-diesel generator with a flywheel energy storage system to supply the required active and reactive power , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[12]  Sergio Vazquez,et al.  A 800 kW wind-diesel test bench based on the MADE AE-52 variable speed wind turbine , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[13]  Zhihong Ye,et al.  Output filter design for a grid-interconnected three-phase inverter , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[14]  J. Clare,et al.  Power smoothing in a variable speed wind-diesel system , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[15]  L.G. Franquelo,et al.  A new power stabilization control system based on making use of mechanical inertia of a variable-speed wind-turbine for stand-alone wind-diesel applications , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[16]  M Maarten Steinbuch.  Optimal multivariable control of a wind turbine with variable speed , 1987 .

[17]  D. S. Zinger,et al.  A variable speed wind turbine power control , 1997 .