Abstract:
With ever increasing demand of electricity and depleting conventional energy sources
with their environmental concerns, renewable energy sources are an excellent
alternative for producing clean energy. Among many renewable energy sources, wind
energy has huge potential to contribute part of energy demand. However, as a result of
unprecedented integration of wind energy in low voltage and high voltage grids,
ensuring stability and power quality following grid codes is a challenge lately. Wind
Energy Conversion System (WECS) suffers from two main problems, 1) fluctuations
in output power due to unpredictable behavior of wind, and 2) retention of connection
during grid faults. The optimal solution to increase Fault Ride Through (FRT)
capability and smoothing of output power fluctuations in PMSG based WECS is still a
point of research in literature. In this research Work, the application of superconductors
to enhance the performance of Permanent Magnet Synchronous Generator (PMSG)
based WECS is investigated. The presented work considers optimal integration of
Superconducting Coil (SC) with PMSG based WECS. Fractional Order PI (FOPI)
control is used for control of SC circuit. Harmony Search (HS) optimization technique
is used for finding optimum parameter values of the SC and FOPI controllers. The
proposed strategy is then compared with PI based control of SC for disturbance in the
form of wind gust and grid fault.
