A novel enhancing LVRT capability of DFIG based wind turbine systems
J.MOHAMMED FEROS KHAN Dr.N.SHANMUGA VADIVOO
In recent decades, concerns regarding carbon emissions, climate change, and limitation of fossil fuels have led to a large increase in generation of electricity via renewable resources. Wind energy has been one of the more successful of these new additions to the generation pool. In this work, doubly fed induction generators (DFIGs) are employed in the wind generation systems. The 3-phase power produced from the wind turbines is given in a grid by means of a suitable interfacing device. Normally the wind power systems are affected by environmental discrepancies and fault disturbances occurred at the transmission level. Hence a Fault Ride Through (FRT) system is employed in the wind power systems to prevent the disconnection of wind farm even under the fault condition. Typically the. A Low Voltage Ride Through (LVRT) is essential with a higher degree of control becauese transmission line undergoes an abrupt change of the fault. Here a nonlinear control system is employed to face the abrupt changes of the voltage and to maintain the system to be stable without a damping system. In this work, a fuzzy controlled active ride through control based on the parallel resonance fault current limiter is presented to obtain the best performance in the FRT systems. The parallel resonance type fault current limiter (PRFCL) is a new auxiliary device manifesting potential application in power systems, which can be simply controlled by determining the proper switching schemes. In order to vali
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