A Third-harmonic Injection Matrix-Type Solid-State Transformer for Permanent Magnet Wind Energy Generation systems

Conventional back-to-back converters with the power frequency transformer for permanent magnet wind energy generation systems have a simple structure. However, there are still some shortcomings such as low power density, high cost, and relatively low efficiency. To address the above issues, an active third-harmonic injection matrix-type solid-state transformer topology well-suited for the high power permanent magnet wind energy generation system is proposed in this paper. The topology has advantages such as high power density, high efficiency, as well as a simple control method. This paper analyses the operating principle and control method of the topology in detail. Finally, a 10kW simulation model verifies the effectiveness of the presented topology.