Enhancement of Transient Voltage Stability of Wind/PV Power System using Fuzzy Logic Based-SVC

Recently, meeting the strict criteria of grid codes for the integrating renewable energy sources (RES) has become a challenge for engineers and researchers. Moreover, voltage stability is an essential criterion for the stable performance of grid connected wind and Photovoltaic (PV) power plants during grid disturbances and fault ride through. This paper investigates the implementation of fuzzy logic-based Static VAR Compensator (SVC) for the voltage stability issue of IEEE-9 bus test system in the presence of Wind and PV energy systems. This paper introduces the application of the fuzzy logic-based SVC as a dynamic voltage restorer to maintain stable voltage and thereby protecting the RES during and after the disturbances. The effectiveness of the controller is evaluated under different fault conditions including three phase and single phase to ground faults. The power system model is simulated in MATLAB / SIMULINK and the comprehensive comparisons have been reported.