Abstract: There are many problems in realizing semi-automatic/automatic station block based on relay circuits, such as the requirements for high-performance circuit components, high costs of inter-station cable laying and maintenance, complex fault analysis in special scenarios and so on. A scheme is proposed to realize semi-automatic/automatic station block by computer based on communication interactive extended information. Through comparison with the relay circuit scheme, it is analyzed that the extended information based on communication-mode interaction has clear meaning and more accurate timing judgment, which can overcome the design defects of the relay mode and adapt to an increased number of complex application scenarios. The proposed scheme also has obvious advantages in construction, operation and maintenance.

Key words: communication interaction, extended information, semi-automatic block, automatic station block

摘要： 基于继电电路实现半自动/自动站间闭塞功能存在对电路元件性能要求高、站间电缆敷设和维护成本高、特殊场景故障分析复杂等诸多问题,提出一种基于通信交互扩展信息由计算机实现半自动/自动站间闭塞功能的方案，通过与继电电路方案进行对比，分析出基于通信方式交互的信息含义明确，时序判断更加准确，可克服继电方式的设计缺陷，适应更多复杂的应用场景，并在施工和运营维护方面具有明显优势。

关键词: 通信交互, 扩展信息, 半自动闭塞, 自动站间闭塞