Review of Modular High Voltage and Large Capacity DC/DC Converter
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.
voltage source converter based high voltage direct current transmissionDC gridmodular multilevel convertermodular high voltage and large capacity DC/DC converter
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