ABSTRACT
An active planning process is necessary to develop the business case for creating a substation or for making major modi™cations. Planners, operating and maintenance personnel, asset managers, and design engineers are among the various employees typically involved in considering such issues in substation design as load growth, system stability, system reliability, and system capacity; and their evaluations determine the need for new or improved substation facilities. Customer requirements, such as new factories, etc., should be considered, as well as customer relations and complaints. In some instances, political factors also in³uence this process, as is the case when reliability is a major issue. At this stage, the elements of the surrounding area are de™ned and assessed and a required in-service date is established.
