A Control Strategy adopted for improving Transient Stability in EESG based Wind Turbines

The increase in addition of new wind generation to the grid have several issues related to grid stability and security. The LVRT capability of wind turbine is one of the major concerns during the grid fault and many countries tail different LVRT requirements of grid codes to ensure the proper operation of wind turbine throughout the fault condition without tripping it from the grid. Consequently, the high penetration of DER to the grid requires an optional method for controlling active and reactive power injection during the normal operation condition and grid fault. This paper discusses about two significant technical solution for LVRT during grid connected mode and seamless transfer during islanding and stabilisation after islanding. The objective of this paper is to comprehend these challenges in implementation of LVRT capability in India in order to come up with appropriate solutions. Simulation results on a 2.3-MW EESG-based WECS using DIgSILENT/Power Factory environment demonstrate the effectiveness of the proposed LVRT scheme under both balanced and unbalanced grid voltage sags.