基于EtherCAT的ITER极向场电源现场层监控系统设计

Design of field monitoring system for ITER poloidal field power supply based on EtherCAT

根据ITER大功率极向场电源高实时性与高可靠性控制的需求,选取了具有高实时通讯性能的工业以太网现场总线EtherCAT(以太网控制自动化技术)设计ITER极向场电源现场层监控系统。依据ITER极向场电源装置体积大、分布较为分散的特点,为保障高可靠性的数据传输,对比了可构成的两种EtherCAT环网冗余拓扑的可靠性,选取从站单元中最末端从站是将E-BUS转换为100BASE-TX/FX的拓展模块的可靠性较高的环网冗余拓扑来设计极向场电源现场层监控系统的拓扑结构。使用了组态软件TwinCAT(基于Windows的控制和自动化技术)对系统进行配置,同时绘制了具有可直观显示并控制现场信号等功能的HMI界面。经测试,该系统可实现对现场层数百路模拟与数字量信号的实时监控,满足了ITER极向场电源的高实时性与可靠性的控制需求。

According to the high real-time and high-reliability control requirements of ITER high-power poloidal field power supply, the industrial Ethernet field bus EtherCAT (Ethernet Control Automation Technology) with high real-time communication performance is selected to design the ITER poloidal field power field layer monitoring system. Due to the characteristics of large size and distributed distribution of the ITER poloidal field power supply device, as well as to ensure high reliability data transmission, the reliability of two kinds of EtherCAT ring network redundancy topologies are compared, and the EtherCAT ring network redundancy topology where the last station in slave station unit is an extension module converting E-BUS to 100BASE-TX/FX is more reliable and is adopted to design the structure of the poloidal field power supply monitoring system. The configuration software TwinCAT (The Windows Control and Automation Technology) is used to configure the system, and Human Machine Interfaces with functions such as visual display and control of live signals are drawn by this software. The experimental tests and operation demonstrate that the system can preferably realize real-time monitoring of hundreds of analog and digital signals on the field layer, and meet the high real-time and reliability control requirements of the ITER poloidal field power supply.