Performance of Grid-Connected Variable Speed WECS Using PMSG under MTPA Control with Common Synchronizing Circuit

Author Name(s): Dhanashree K. Porate, S. P. Gawande, K. B. Porate, J. A. Sheikh
Author Email: dhanashreeporate8@gmail.com

Abstract

This paper exclusively evaluates the performance of grid connected variable speed Wind Energy Conversion System (WECS) using Permanent Magnet Synchronous Generator (PMSG) with Maximum Torque Per Ampere (MTPA) control. A new approach is employed using common synchronising circuit for generator and grid-side converters. The back-to-back converters used in WECS are realized using conventional two-level converters with common DC-link. In MTPA control maximum power is extracted using Optimal Power Control (OPC) approach. The standard and modified space vector representation under separate and common synchronization conditions are also derived for the proposed control and its improvisation is discussed. A detailed system performance has been evaluated and compared for this control and effective analysis has been carried out and presented with experimental results.

Abstract

This paper exclusively evaluates the performance of grid connected variable speed Wind Energy Conversion System (WECS) using Permanent Magnet Synchronous Generator (PMSG) with Maximum Torque Per Ampere (MTPA) control. A new approach is employed using common synchronising circuit for generator and grid-side converters. The back-to-back converters used in WECS are realized using conventional two-level converters with common DC-link. In MTPA control maximum power is extracted using Optimal Power Control (OPC) approach. The standard and modified space vector representation under separate and common synchronization conditions are also derived for the proposed control and its improvisation is discussed. A detailed system performance has been evaluated and compared for this control and effective analysis has been carried out and presented with experimental results.

Conclusion

In this paper, the PMSG based variable speed WECS for variable speed with common synchronising circuits is implemented. The modelling and vector diagrams of both the schemes with MPPT controls are explained in detail. Further, the modified space vector diagram and its corresponding steady state performances under common synchronising circuits for MTPA control has been drawn and compared with conventional phasors. Also, the improved system performance under new control has been elaborated and presented. This control scheme can be helpful in extracting the maximum power from the system at different wind speeds and successfully injects the generated power into the grid with successful operation. The proposed scheme is also validated through appropriate experimental results.

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