Substation DC system data diagnosis method

The invention provides a transformer substation direct current system data diagnosis method. A diagnosis model is constructed corresponding to a direct current system; performing diagnosis operation by taking the input parameters of the direct current system as the input parameters of the diagnosis model; constructing diagnosis nodes in the diagnosis model corresponding to the acquisition points of the direct current system; operation parameters at the diagnosis nodes are calculated; and comparing the obtained real-time parameters of the direct current system with the operation parameters at the diagnosis node, and performing early warning reminding when a comparison result exceeds a preset range. According to the method, the diagnosis model is constructed, the actual input of the direct-current system is used as the input, the theoretical operation parameters of the monitoring points during operation according to the actual parameters are calculated, and the real-time parameters monitored in real time and th