| This paper presents a case study for monitoring the quality of electric energy in an industrial consumer. The measurements were carried in the power supply point where the quality of the electric energy is influenced by the activity of the manufacturer, the transmission and distribution provider, the supplier as well as the electric power consumer activity. Transients occur at this limiting point, with negative effects on the consumer, as well as on the electric power supply network. There are two types of electric energy quality indicators, depending on the point of occurrence. Primary quality indicators are given by the production, transport and distribution of electric energy. Secondary indicators are given by the disruptive operation of industrial consumers. The data processing was achieved using LabVIEW software in terms of the two types of quality indicators. Based on the data obtained from the measurements and using the interface created in LabVIEW, it was possible to carry out the analysis of the average hourly consumption, the power factor, the wave forms of the current and voltage, the analysis of the current and voltage harmonics. The software application enables creation of customized reports with varying ease of use and flexibility. Using the software application developed in LabVIEW, full quality analysis of electric energy can be done at the user’s premises. |
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