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在对分层分布式变电站综合自动化系统信息流通量、传递方式和实时控制要求分析的基础上 ,站内通信网采用 CAN现场总线。根据 CAN网具有的高可靠性、多主控节点和易开发优先权等特点及间隔层各单元功能的实际需要 ,研究和实现了间隔层内各间隔之间的强实时性控制功能信息的传递 ,证实了仿真试验数据与理论分析的一致性 ,它比传统实现方式具有更高的可靠性。从而提出低频时切负荷控制和备用电源启动 /闭锁控制实现基于 CAN数字通信的分散式控制的新结构 ,可节省二次控制电缆和减小电压互感器负载
Based on the analysis of information flow, transmission mode and real-time control requirements of integrated automation system of substation and substation, the communication network in the station adopts CAN field bus. According to the CAN network has the characteristics of high reliability, multi-master node and easy to develop priorities and the actual needs of each unit function of the spacer layer, research and implementation of the transmission of strong real-time control function information between the various intervals within the spacer layer , Which confirms the consistency between simulation test data and theoretical analysis. It has higher reliability than the traditional method. Thereby providing low-frequency load-cut control and standby power start / lock control CAN-based digital communications to achieve decentralized control of the new structure can save secondary control cables and reduce the voltage transformer load