Transformerless Series-Connected Current Source Converter

Series-connected current source converters (SC-CSCs) are a good candidate for high-power, medium-/high-voltage applications. However, existing SC-CSCs require the use of bulky and costly transformer. In this article, a transformerless SC-CSC is proposed. The operation principle of the proposed SC-CSC is presented, and the modulation is developed. A case study is conducted to verify the performance of the converter.