混合级联输电工程的可靠性纵联保护技术研究

Research on Reliability Longitudinal Protection Technology of Hybrid Cascade Power Transmission Project

为提高混合级联直流输电线路工作的稳定性,文章提出了基于电网换相换流器–模块化多平换流器的混合级联输电线路纵联保护模型。试验结果表明,该保护模型在维护输电系统的稳定性与判断故障方面有较好的性能,对混合级联输电线路有较好的保护作用。

To improve the stability of hybrid cascaded DC transmission lines,this article proposes a longitudinal protection model for hybrid cascaded transmission lines based on grid converter modular multilevel converter.The experimental results show that the protection model has good performance in maintaining the stability of the transmission system and diagnosing faults,and has a good protective effect on hybrid cascaded transmission lines.