Abstract

The IEC 61970 Common Information Model (CIM) is an object-oriented representation of a power system and is used primarily as a data exchange format for power system operational control systems. This paper introduces the concepts behind class modeling and how this approach is used to define the power system components based on CIM. And a new modeling rule for the hierarchical Energy Management Systems (EMS) is presented. The rule is unified modeling and management in the superior EMS and the model of the underlying EMS divided and equaled from the unified model directly. To illustrate one of the effective means of using the CIM/XML model exported from EMS, a CIM toolkit implemented in C# is developed as the core of Automatic Voltage Control (AVC) system for storing, processing, extracting, and exchanging data directly from CIM objects.

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