  In this paper, a data stream architecture is presented for electrical power
quality (PQ) which is called PQStream. PQStream is developed to process and
manage time-evolving data coming from the country-wide mobile measurements of
electrical PQ parameters of the Turkish Electricity Transmission System. It is
a full-fledged system with a data measurement module which carries out
processing of continuous PQ data, a stream database which stores the output of
the measurement module, and finally a Graphical User Interface for
retrospective analysis of the PQ data stored in the stream database. The
presented model is deployed and is available to PQ experts, academicians and
researchers of the area. As further studies, data mining methods such as
classification and clustering algorithms will be applied in order to deduce
useful PQ information from this database of PQ data.
