基于RTDS仿真的柔直阀控双从策略优化研究

Research on Optimization of Double Slave Strategy for VSC⁃HVDC Valve Control Based on RTDS Simulation

柔性直流输电换流阀阀控的双从故障是唯一从套系统可以出口跳闸的故障,为了避免从套系统误出口带来的跳闸,提出了一种优化的双从判断策略。首先,对当前柔直阀控结构和双从判断机理进行了分析;其次,结合现场出现的跳闸故障分析其原因,对双从判断策略进行了优化;最后,在实验室搭建RTDS实验系统完成了验证。所提方案已经成功应用于鲁西柔直工程,为柔直工程安全稳定运行提供了保证,对后续柔直阀控研发也具有一定的参考价值。

The double slave fault of valve control in VSC⁃HVDC transmission is the only fault tripping from the slave system.In order to avoid the tripping due to the incorrect output of the slave system,an optimized double slave judgment strategy is proposed.Firstly,the current valve control structure and double⁃standby judgment mechanism are analyzed.Then,the double slave judgment strategy is optimized in combination with analysis of the reason of tripping occurred at site.Finally,the RTDS test system is setup in the laboratory for verification.The proposed scheme has been used successfully in Luxi VSC⁃HVDC project,has provided guarantee for safe and stable operation of VSC⁃HVDC project and also has a reference value for subsequent VSC⁃HVDC projects.