畸变电源条件下矩阵变换器的谐波抑制

The use of matrix converters for AC-to-AC power conversion provides economy on weight and size, high reliability and efficiency. For these reasons, the matrix converter technology is currently being adopted in various applications, including variable speed AC drives for mining vehicles. This paper treats harmonic issues surrounding the matrix converter operation, such as transfer of the supply side distortions to the load side and injection of excessive current harmonics into the supply. The paper explores fundamental limitations to the harmonic performance and proposes a flexible control scheme that provides full harmonic compensation at the load side or at the supply side. A trade-off approach to the harmonic suppression at both sides simultaneously is also investigated. The strategies presented in this paper make matrix converter-based drives suitable for power systems with weak and distorted supplies. The findings of the paper are validated by simulation and experiment.