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A Modular Multilevel DC-Link Front-to-Front DC Solid-State Transformer Based on High-Frequency Dual Active Phase Shift for HVDC Grid Integration

机译:基于高频双有源相移的模块化多电平直流链路从前到前的直流固态变压器,用于HVDC电网集成

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摘要

This paper proposes a modular multilevel dc-link dc solid-state transformer (MADCT) based on high-frequency dual active phase shift for HVDC grid integration. The proposed MADCT employs one arm of modular multilevel converter as HVDC active front-end interface and dual active bridge as high-frequency power transfer link, which brings many advantages and makes the operation of MADCT quiet different with traditional dc transformers. Compared with the traditional dc transformer schemes, the MADCT not only has good modularity and flexibility but also has good fault handling capacity. Especially, the performances of current stress, power transfer capacitor, and efficiency are improved. The topology, operation principle, voltage, current, power performances, and control and parameter design are presented and analyzed comprehensively in this paper. At last, a MADCT prototype is built and the experimental results verify the correctness and effectively of the proposed solution.
机译:本文提出了一种基于高频双有源相移的模块化多电平直流环节直流固态变压器(MADCT),用于HVDC电网集成。拟议的MADCT采用模块化多电平转换器的一个臂作为HVDC有源前端接口,并使用双有源电桥作为高频功率传输链路,这带来了许多优势,并使MADCT的运行与传统直流变压器不同。与传统的直流变压器方案相比,MADCT不仅具有良好的模块化和灵活性,而且具有良好的故障处理能力。特别地,改善了电流应力,功率传输电容器的性能和效率。本文对拓扑结构,工作原理,电压,电流,功率性能以及控制和参数设计进行了介绍和分析。最后,建立了MADCT原型,实验结果验证了所提方案的正确性和有效性。

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