Search Space Reduction for Fast Multi-Objective Optimization of Inverter LCL Filters

LCL filter design is challenging due to the high number of degrees of freedom (DoF) and constraints to optimize Cost, Loss, and Volume (CLV). These challenges are addressed by eliminating the DoF and using approximate estimations of CLV in the literature. This paper proposes a novel approach to reduce the DoF without compromising the optimal design and considers the physical implementation with real-world components for accurate CLV optimization. This approach is used for designing an LCL filter for a 45KW, 416V T-Type three-phase inverter, and lead to significant improvements in terms of Cost, Loss, and Volume.