Introduction.- Basic Approaches for Reducing Second Harmonic Current in Single-Phase Power Converter.- Second Harmonic Current Reduction for Two-Stage Single-Phase Inverter with Buck-Derived BVCC as Front-End DC-DC Converter.- Second Harmonic Current Reduction for Two-Stage Single-Phase Inverter with Boost-Derived BVCC as Front-End DC-DC Converter.- Second Harmonic Current Reduction for Cascaded Single-Phase Inverter with Pre-Regulator plus LLC Resonant...