The invention discloses 
digital substation testing 
simulation method. In the method, an IEC61850 standard digital 
dynamic testing simulation technology-based substation 
system testing method is adopted, namely a substation 
simulation model is established, and the actual motion is simulated for 
system closed-loop testing so as to detect the dynamic characteristics of a device to be detected. For the 
integrated design of the 
system, a frame structure consisting of a PCI board card and a multi-CPU desktop is adopted, and a system 
simulation testing device consisting of the multi-CPU desktop, a PCI 
bus-based IEC61850 communication card and a small 
signal and switching value interface card is established, wherein the multi-CPU desktop is a system control platform, and is used for performing 
processing such as drawing, simulation computation, man-
machine interaction and the like; the PCI 
bus-based IEC61850 communication card provides a plurality of optical 
Ethernet ports to connect a plurality of protective devices and 
control equipment; and the protective devices receive MU data of the communication card, and the generated information such as switch position change and the like is returned to the desktop through the communication card to participate in 
electromagnetism transient calculation for the simulation model.