变电站GOOSE报文在IED中的实时处理

报文的通信延迟包括传输延迟和处理延迟2部分。IEC61850标准将面向通用对象的变电站事件（GOOSE）报文直接映射到数据链路层，能有效减少传输延迟。文中对GOOSE报文在变电站智能电子设备（IED）中的处理延迟进行了研究。分析了前后台方式的嵌入式系统在变电站IED中处理实时报文方面的不足，提出在IED中采用具有强实时内核的操作系统，并针对IED中实时报文和非实时报文混合处理环境需求，在RTAI实时操作系统上设计了保障GOOSE报文处理实时性的方案。实验验证了该方案的有效性和实用性。该研究结果对于使用IEC61850的变电站IED过程总线通信设计具有参考意义。

Real-time Processing of GOOSE Message in Substation

Messages communication delay is composed of transmission delay and handling delay.According to IEC 61850 standard,the generic object-oriented substation event(GOOSE)message is mapped onto the data link layer direct,which can decrease the transmission delay.The message handling delay in an intelligent electronic device(IED)of substation is discussed,and a hard real-time operation system in IED is adopted owing to the shortcomings of the traditional foreground/background system in handling real-time messages.According to the environment of mixed message transmission of real-time message and non-real-time message,a method is designed to guarantee disposing GOOSE message in real-time on a real-time application interface(RTAI)operating system.The experiment results demonstrate that this method is valid and practicable.The research result is significant for the design of IED process layer communication with IEC 61850.