中文摘要：

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。

英文摘要：

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.