变电站过程总线采样值传输仿真系统

为验证基于IEC61850-9-2过程总线的继电保护方案,提出一种基于采样值传输的过程总线仿真系统.仿真系统包括网络平台、流量源和流量控制3个部分.系统底层采用网络数据包过滤器(NPF)内核组件设计,配置高精度定时器,工作在数据链路层,可定性、定量地产生采样值报文,为继电保护实验提供稳定的电压、电流信号.为了对采样值及其传输控制进行验证,构建了基于IEC61850-9-2/LE的采样值传输模型,并在工控机上实现了对信号源的仿真,验证了采样值数据完全符合标准.

Simulation system of substation process bus based on sample transmission

To verify the protection scheme based on IEC61850-9-2,a simulation system of substation process bus based on sample transmission is proposed, including network platform, traffic source and traffic control. Its network driver is developed by NPF(Netgroup Packet Filter) with a high precision timer,works on the data link layer and quantitatively and qualitatively generates the sample messages of voltage and current signals for protection experiments. To verify the simulation of samples and its transmission control,a sample transmission model based on IEC61850-9-2/LE is built in an industrial PC and the traffic source is simulated, which proves that the sample messages conform to the standard.