Abstract
At present, the use of DC convergence and DC transmission (abbreviated as all DC) is recognized as the most effective technical solution and inevitable trend to solve the flexible access of large-scale new energy generation. However, the high-voltage and large-capacity DC-DC converters used in the DC convergence of the full DC system are still in the preliminary research stage. This paper presents a high voltage and large capacity isolated DC-DC converter topology, which is composed of three-stage boost circuit. The simulation results show that the topology can increase the output voltage of wind turbine from 1kV to 320kV, effectively improve the boost ratio of converter, and provide a theoretical basis for the realization of full DC offshore wind power system.
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