Fire Hawk Optimized DVR Strategy for Improved Power Quality and LVRT Performance in PV-Connected Grid

Power Quality (PQ) issues in power distribution
networks include voltage sags, swells, and harmonics, all of
which disrupt operations. Dynamic Voltage Restorer (DVR)
technology is deployed to mitigate these challenges. Existing
control methods integrated with DVR systems exhibited
drawbacks like steady-state errors, reduced efficiency, and high
Total Harmonic Distortion (THD). The introduction of Fire
Hawk Optimized (FHO) DVR proven effective in resolving these
issues. It uses solar PV cells to power the DVR’s DC link,
boosted by Interleaved Boost Converter (IBC). It effectively
converts low fluctuating PV power into enhanced power for
delivering desired power to the DC link. It is managed using
Perturb and Observe (P&O) methodology. The efficiency gets
further improved the FHO algorithm that produce optimal
solution for non-linear optimization problems. Thus, the
proposed DVR strategy mitigates PQ issues, minimizes low￾order odd harmonic components in the VSI output current and
reduces THD. The proposed system's performance tested using
Matlab/Simulink. The results validate that enhanced converter
efficiency of 95.69% and tracking efficiency of 99.15% is
attained, providing a novel method for the enhancement of PV￾connected grid performance