模块化高压大容量DC/DC变换器综述

Review of Modular High Voltage and Large Capacity DC/DC Converter

随着新能源发电占比增加和电网规模的不断扩大,直流输电系统的容量不断提升,含有不同电压等级的直流电网是未来发展的必然趋势。在此背景下,DC/DC变换器作为直流电网关键设备,在多电压等级互联场景中发挥着重要作用。文中首先对已有的模块化高压大容量DC/DC变换器进行归纳、分类和比较,然后阐述了目前模块化高压大容量DC/DC变换器的拓扑结构、工作原理与特点,并针对其特点提出了不同变换器的适用场景,最后对未来的研究方向提出了建议。

With the increasing proportion of new energy generation and the continuous expansion of power grid scale,the capacity of DC transmission system is constantly improving,and DC power grid with different voltage levels is the inevitable trend of future development.In this context,DC/DC converter,as the key equipment of DC power network,plays an important role in multi-voltage level interconnection scenarios.In this paper,the existing modular high-voltage and large-capacity DC/DC converters are summarized,classified and compared,then the topology,working principle and characteristics of the current modular high-voltage and large-capacity DC/DC converters are expounded,and the applicable scenarios of different converters are put forward according to their characteristics.Finally,suggestions for future research directions are put forward.