Power System Model Integration for EMS and Planning

In power utilities, Independent System Operators (ISOs), and Reliability Coordinators (RCs), the power system models were often developed and maintained separately for grid operations and system planning departments to meet the distinctive business needs. Due to this de-facto modeling process, the two power system models for operations and planning tend to diverge over time, although they both intended to represent the same physical power systems. This creates significant challenges to engineers on both sides, as they assess the real-time and study the future states of the power grid using the EMS model and planning model respectively, but sometimes have to try to reconcile the gaps between the two models when models delta may cause unacceptable study results. The ultimate solution to this legacy issue is to build a central modeling authority, preferably based on Common Information Model (CIM) within the organization. This however is very resource intensive and costly to accomplish. In this paper an innovative approach is proposed, which integrates the operations and planning models using intelligent rule based methods to map equipment between two models in databases. The methodologies for establishing the mapping is discussed in great detail. With the accomplishment of model integration, several of its use cases are also discussed.