Data Warehouse and Analysis Agents

The paper discusses automated substation data integration and analysis. Recorded data collected from various substation IEDs is stored into a substation data warehouse that utilizes standardized file formats and database interface. The data warehouse allows different software agents to convert raw data to useful information and represents an interface for functional integration of different applications. The paper introduces a framework for application (software agent) integration. The framework allows accessing IED and configuration data, as well as organizing agent reports, and user interfaces. The transparent implementation of the application interfaces enables an open software environment design, an important feature of future automated analysis systems. Examples of open system implementations are given at the end. First example demonstrates a solution that integrates data from three types of substation IEDs and combines three processing and analysis agents. Second example demonstrates how adding digital protective relay data into an existing solution for automated integration, processing and analysis of DFR data may be done. Finally, the last example demonstrates analysis agent that performs two-end fault location calculation built on the top of the DFR data integration solution. Index Terms — substation measurements, substation automation, power system faults, power system monitoring, substation data warehouse, software agent, fault location