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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.