厦门柔直工程交流故障穿越失败事件分析及改进措施

Analysis and improvement for AC fault ride-through failure event in Xiamen flexible HVDC transmission project

针对±320kV厦门柔性直流输电工程中一起区外故障引起换流站交流故障穿越失败的事件进行分析。首先简要介绍厦门柔直工程接线方式及配置,然后详细阐述交流故障穿越失败事件的经过及现象,分析并指出事件原因。结合厦门柔直提升改造工程,提出针对阀控系统和极控制保护系统的优化方案,并通过各种运行工况下的仿真试验,验证了方案的可行性,以期为同类工程的改造提升提供参考。

This paper analyzes the AC fault ride-through failure event of converter station caused by an external fault in Xiamen ±320kV flexible HVDC transmission project. The connection mode and configurations of the project are introduced, the process and phenomenon of the event are described, and the causes of the event are analyzed and pointed out in this paper. In combination with the Xiamen flexible HVDC transmission improvement project, the optimization scheme for the valve control system,the pole control system and the pole protection system is proposed. Through the simulation under various operating conditions, the feasibility of the scheme is verified, and the experience can be used as reference for similar improvement projects.