王渝红,刘进飞,曾琦,秦浩庭,邹朋,陈勇.一种具备直流故障阻断能力的新型子模块研究[J].电测与仪表,2020,57(19):1-7. Wang Yuhong,Liu Jinfei,Zeng Qi,Qin Haoting,Zou Peng,Chen Yong.Research on a new sub-module with DC fault current blocking capability[J].Electrical Measurement & Instrumentation,2020,57(19):1-7.
一种具备直流故障阻断能力的新型子模块研究
Research on a new sub-module with DC fault current blocking capability
Considering the problem that Half-Bridge Sub-modules which are widely used in the current flexible HVDC projects cannot deal with DC fault, a sub-module topology with DC fault current self-blocking capability is proposed. Firstly, the basic structure and operation principle of the proposed novel sub-module topology are expounded. Based on the equivalent circuit of the converter station during the time of DC fault, the fault current blocking mechanism and the voltage withstand level of the novel sub-module is analyzed in detail. Then calculate the hybrid implementation of the sub-module and compare the blocking capability and economic characteristics.Finally, a simulation model was built based on PSCAD/EMTDC software environment to verify the blocking ability of the proposed sub-module. From the simulation results, this sub-module topology can block DC fault current quickly and efficiently.
