Abstract
Verification of electric energy measurement is a very important issue. The research deals with the modified method of testing equations, which enables measurement-based electrical energy estimation of higher accuracy compared to the initial measurements. The influence of the testing equations number on the estimation error value is investigated. Test results are presented for 14-node IEEE scheme. The necessity of using the limited measurement level number is proved.
Highlights
Information about the measured values of electrical energy received from Automatic Meter Reading (AMR) systems is generally quite reliable
Grid companies draw up the electrical energy balance monthly, with the balance serving as the basis for deriving the actual energy losses in order to compare them to the regulatory-specified ones
Modern AMR systems are quite reliable sources of data comprising electrical energy flows corresponding to network elements
Summary
Information about the measured values of electrical energy received from Automatic Meter Reading (AMR) systems is generally quite reliable. The systems and their component devices become more and more technically complex, the actual electrical energy losses value remains high and significantly exceeds the technical and regulatory-specified values. The AMR complex measurement error depends upon the feeder operation conditions and load with energy value typically being underestimated under off-nominal conditions. Negative AMR complexes systematic errors might lead to commercial energy losses increase. Another issue is intentional commercial metering data distortion, especially in case the metering complexes are owned by consumers, who are interested in measurements understatement to decrease the electricity costs.
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