An expert system approach to designing and testing substation grounding grids

An expert systems methodology is described which has been used to develop a computer system for designing and testing the grounding grid system of power substations. The knowledge required to perform the substation ground design has been identified. Empirical rules are used to determine the characteristics of the grounding conductors and the type of conductor joints. The most economical design and construction of the grounding grid system are obtained by consulting a database of available workforce, machinery and materials. An interactive dialogue for testing a grounding system is included. Interactive graphical input-output is provided to help the user draw the substation layout plan and input the required data. The calculated grounding grid system and arrangement of conductors are shown in color on the computer screen. The expert system has been developed on a low-cost personal computer.>