WRLS-Driven Robustness Enhancement of Nine-Switch Unified PV-DVR Systems Under Unbalanced Grid Conditions. - Jefferson Rafael Pereira De Assis; Darlan Alexandria Fernandes; Maurício Beltrão de Rossiter Correa; Alfeu J. Sguarezi Filho; Fabiano Fragoso Costa; Edison Roberto Cabral da Silva (IEEE Access, 2026)