ArticleScientific reports2026
Multi-objective hybrid GA-PSO optimized PI control for grid-connected PV-fed cascaded H-bridge multilevel inverter.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
The growing integration of PV energy systems into modern power grids necessitates advanced control techniques to maintain stable operation, fast dynamic response, and high-power quality under nonlinear and time-varying conditions. Cascaded H-bridge multilevel inverters (CHB-MLI) are widely adopted for grid-connected PV applications. This study develops a closed-loop control for a PV Integrated on-grid five-level CHB-MLI aimed at enhanced dynamic response and improved power quality. The hybrid GA-PSO technique is used for optimal tuning of PI controllers governing grid current regulation and DC-link voltage balancing through a multi-objective fitness function. The optimization framework simultaneously minimizes THD, DC-link voltage imbalance, steady state error and settling time. The simulation results are obtained by using MATLAB/Simulink, which demonstrates the feasibility of the proposed controller. Real-time validation using an OPAL-RT simulator further confirms the robustness and practical effectiveness of the hybrid GA-PSO-based PI control.
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