Abstract

This paper represents the structure and functions of total power quality data management system including power quality monitoring system (PQMS), GUI system, and PQ diagnosis system. PQMS characterizes RMS value, harmonics, and frequency, and detects power quality (PQ) events. GUI system manages and stores power quality data received from a number of PQMSs and displays the power quality trends and events. PQ diagnosis system gives total solution of power quality problems such as statistical analysis, event prediction, power quality indexing, event identification, remedy suggestion, etc. Therefore, users can improve their power quality level according to advices provided by PQ diagnosis system. This paper explains the functions of PQ diagnosis system in detail. Moreover, a prototype of PQ diagnosis system as well as PQMS and GUI system is constructed and tested.

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