ZHENG Mei, CHEN Qian, SONG Yuanjian, et al. Parameter Selection Method of Modular Combined DC Transformer and Its Main Circuit[J]. High voltageapparatus, 2021, 57(8): 151-158.
ZHENG Mei, CHEN Qian, SONG Yuanjian, et al. Parameter Selection Method of Modular Combined DC Transformer and Its Main Circuit[J]. High voltageapparatus, 2021, 57(8): 151-158. DOI: 10.13296/j.1001-1609.hva.2021.08.021.
DC transformer is the main method to solve the problem of inconsistent voltage levels in case of interconnection of DC transmission system.However
the traditional DC transformer contains AC transformer and its price is therefore very expensive.For this issue
a kind of modular combined DC transformer(MCT for short)without AC transformer is proposed in this paper.Firstly
the topological structure and operating principle of MCT are analyzed.Then
the selection principle of parameters is proposed in accordance with the performance requirements of MCT.Finally
the simulation model of DC transmission system containing MCT is studied in PSCAD.The feasibility of the MCT proposed in this paper is verified by the time-domain simulation results.