摘要
为了评估智能变电站过程总线网络性能,从交换式以太网的工作原理出发,研究了过程总线通信模型。根据IEC61850描述的发布/订阅通信机制,引入了网络系统的最小空间概念。建立了由采样值(sampled value,SV)和通用面向对象的变电站事件(generic object oriented substation event,GOOSE)构建的网络交换空间模型。给出了交换空间的多播映射方法,以获得网络最优(流量)传输模型。根据优先级调度队列的阻塞特性,推导了SV、GOOSE共网传输时延上界的理论计算公式。提出了一种简单、高效且不依赖同步时钟源的过程总线网络时延评估算法,解决了工业现场网络性能的实时监视和诊断问题。以一典型变电站过程总线实验为例,验证了评估模型和算法的正确性。该项研究对智能变电站过程总线优化设计具有参考意义。
To assess the overall network performance of process bus in smart substation, the mathematic model of process bus communication was analyzed from the working principle of switched Ethernet. According to the publish/subscribe communication mechanism specified in IEC 61850, the minimal space concept of network system was presented. The switch space shared by sampled value （SV） and generic object oriented substation event （GOOSE） was modeled. The multicast mapping method of the switch space was introduced to obtain the optimal network （traffic） transmission model. The upper delay calculation formula for the shared-network of SV and GOOSE was deduced based on the blocking characteristics of priority scheduling queue. A simple and efficient evaluation method of process bus network latency which can work without the help of synchronous clock source was proposed to implement the real-time monitoring and diagnosis of network performance in industrial field. A typical process bus experiment validated the availability of proposed models and methods. The researching result is valuable for the process bus optimization design of smart substation.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第7期1072-1078,共7页
Proceedings of the CSEE
