Performance Analysis of Doubly Fed Induction Generator based Wind Energy Conversion System with Enhanced Low Voltage Ride Through Capability

Abstract

Electricity generation with renewable energy sources (RES) like wind and solar are newlinepromoted for reducing carbon footprint and global warming. As of December 2021, the newlineinstalled capacity of wind turbines worldwide had increased to over 837GW, helping newlinethe world to avoid more than 1.2 billion tonnes of carbon dioxide yearly. The operation of the power system currently faces new challenges due to the increased penetration of RES. In contrast to the conventional synchronous generators, renewable energy sourced power plants are unable to provide inertial responses during grid transients. Power newlineelectronic converters (PEC) have become essential to achieve grid integration of RES. newlineWind energy conversion system (WECS) configurations have undergone significant newlinetransformation with the developments in power electronics technology. Out of various newlineWECS configurations, permanent magnet synchronous generator (PMSG) and doubly newlinefed induction generator (DFIG) are the two types of generators that have recently newlinebeen used to extract wind energy in combination with power electronic converters. newlineDFIG based WECS is preferred because of its advantages such as back to back power newlineelectronic converter rating with a fraction of total generating power (30%) and the newlineability to operate as generator in both super-synchronous and sub-synchronous modes. newlineUnder typical operating conditions, the power system should be capable of active newlinepower control with frequency regulation and reactive power control with voltage newlineregulation. With the increased installation of WECS, the key research challenges in newlinemaintaining better frequency support, voltage profile, fault ride-through capability, low newlinevoltage ride-through (LVRT) capability, reliability, etc. for improved grid stability are to be addressed with the optimal control of power electronic converters. Balanced newlineor unbalanced voltage dips may be evolved in power system owing to various types newlineof faults. Currently, majority of WECS are disconnected from power system during newlinesignificant voltage sags