基于现场总线强实时性控制信息传递的研究和仿真

STUDY AND SIMULATION OF FIELD-BUS BASEDTRANSFER OF CONTROL INFORMATION OF STRONG-REAL-TIME

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 。

In the analysis of information capacity. transfer mode and the real time control of hierarchical distributed integrated.automation system of substation, the CAN field-bus is adopted. In the base of the high reliability, multi-master control nodeand easy developing priority, and according to the actual requirements of CAN--bus for gap unit function in the gap layer. thecontrol function of strong real-time information transfer between gaps in the gap layer is developed. The consistency ofsimulation data and theory analysis is testified, and the new structure of distributed control based on digital communicationCAN field-bus for low-frequency cut--off load control and start/block control of reserve power function are proposed. This cansave the control cable and enhance the reliability.