嵌入式实时操作系统VxWorks在数字化变电站间隔层设备中的应用

摘要

VxWorks,a kind of embedded real-time operating system,is applied in the design of the integrated digital protection, measuring and control devices to meet the requirements of smart grid for the high performance of bay-level devices in digital substations. Its hardware platform is introduced and the realization of its high reliability and real-time performance is explained,which divides all functions into various interrupts and tasks with different priorities and applies the semaphore and message queue to properly dispatch the tasks. The implementation of the embedded Ethernet technique based on IEC61850 is discussed,which adopts the MMS+TCP/IP+Ethernet application mode to communicate with the station-level devices. The design has been applied in real projects.%为满足智能电网对数字化变电站间隔层设备高性能的要求,提出了将嵌入式实时操作系统VxWorks应用于数字化保护测控一体化装置的设计方案.介绍了VxWorks运行硬件系统及其强实时性和高可靠性的实现方法,将装置功能划分为不同优先级的中断和任务,采用信号量和消息队列对任务进行合理调度.阐述了基于IEC61850标准的嵌入式以太网在装置上的实现方法,采用制造报文规范(MMS) +TCP/IP+以太网实现与站控层的网络通信.该设计方案已在工程实际中成功应用,并取得良好效果.