Wind power generation has gained significant attention as a solution to environmental issues. However, the high costs associated with operating and maintaining wind farms, particularly offshore ones, have posed significant challenges. Specifically, the operation and maintenance expenses account for approximately 30% of the overall life cycle cost. One of the primary factors contributing to this high cost is the frequent failure of power converters, which results in extended downtime, especially for wind farms located far from the shore. Consequently, this reduces the capacity factor, underscoring the need to enhance the reliability of power converters to minimize maintenance requirements.

To address this issue, we propose a novel design for a full converter with Z-Source, specifically tailored for variable speed wind turbines. This novel structure offers a solution to the high failure rate of power converters by eliminating electrolytic capacitors, which are responsible for approximately 30% of converter failures. As a result, the proposed system has the potential to reduce maintenance frequency and improve the capacity factor of wind energy conversion systems. We verify the effectiveness of our proposed system through numerical simulations and expwriments.