Power electronics serve as the interface between the power grid and end-users. The design of power electronic converters typically initiated by end-users. A new converter design comes after a new end-user, and to meet the need of a specific application scenario. Power converters will follow the requirements and deliver the power from the grid to the consumers.

As an increasing number of renewable energy resources actively participate in the power generation via power electronics, the grid with high penetration of renewable energy resources raises new requirements for power converters. Unlike conventional end-users, the requirements from the grid are more versatile, and therefore more challenging.