Power screen cabinet multi-type device connection cable length pre-calculation method

The invention relates to a method for pre-calculating the length of a multi-type device connecting cable of an electric screen cabinet. The method comprises the following steps: firstly, constructing a device model library and an expert knowledge library; the expert knowledge base is used for converting the wiring process requirements of the screen cabinet and the wire length measurement experience into expert knowledge for semantic representation; secondly, according to a screen cabinet design BOM and a device model library, a screen cabinet space geometric model is constructed, and the screen cabinet space geometric model mainly comprises component connection point coordinate modeling and screen cabinet routing modeling; on the basis of a screen cabinet space geometric model, expert knowledge and a shortest path algorithm, inputting a device connection relation table, and calculating to obtain cable lengths and cable routing directions among the connecting devices; then, based on a negotiation and deadlock