智能变电站过程层网络跳闸时间特性

Tripping Time Characteristics in Smart Substation Process Level Network

过程层网络性能直接影响智能变电站的安全、可靠运行,研究过程层不同组网方式的性能,可为智能变电站过程层网络方式的选择提供必要的参考,介绍过程层直采直跳、网采网跳等不同组网方式的特性,阐述虚拟局域网、优先级等技术工程应用的原则,详细测试不同网络方式和不同网络工况下继电保护的动作时间,分析过程层跳闸时间特性。试验结果表明,直跳的时间稳定,网跳的时间随着网络流量的增加而增大,且离散性较大。

The process layer network has a direct impact on the security and reliable operation of smart substation.Research on the performances of different network modes can provide an essential reference for the selection of process layer network mode.Firstly,the characteristics of different network modes are introduced,including direct sampling and tripping,network sampling and network tripping.The application principle of VLAN and priority level is elaborated.Then,the protection operation time under different network modes and network conditions is tested in detail.At last,an analysis is made on the characteristics of the process layer tripping time.The testing results show that the direct tripping time is stable; the network tripping time increases with the increase of the network traffic; and the discreteness is relatively large.