The Power Electronic Transformer (PET), also known as the Solid-State Transformer (SST), is an advanced transformer that utilizes power electronics technology for energy transfer and power conversion. Unlike traditional power frequency transformers, which rely on electromagnetic induction to transfer energy across different voltage levels in AC systems, the PET can handle power conversion between AC and DC, as well as manage different voltage levels and frequencies. This is achieved through the integration of power electronics and digital control technologies, offering greater flexibility and efficiency in energy management.