A testing procedure for the new, electronic revenue energy meters

Abstract

Electric energy meters have been always designed\ud to account energy under sinusoidal conditions and therefore no\ud uncertainty specification was provided outside these conditions.\ud This was considered acceptable when voltage and current distortion\ud levels were low and the old, well known induction meters\ud were used. In fact, under these conditions, the measurement\ud errors caused by distortion did not, generally, penalize the customers.\ud The present situation is, however; quite different: distortion\ud is not negligible any longer; especially in low voltage systems,\ud and the modern electronic energy meters can be much more sensitive\ud to distortion than the induction ones, depending on the implemented\ud measurement algorithm. This paper proposes a new calibration\ud procedure, based on a synthesizer of randomly distorted\ud signals, capable of evaluating the measurement uncertainty of the\ud energy meters under the distorted conditions that are likely to be\ud met in their normal operating conditions

New Method of Active Power Measurement under the Conditions of Non-Stationary Distortion Signals

“…Studying the method of active power measurement under the conditions of the nonstationary distorted signals is urgent. In the developed countries, the problems of active power measurement under the conditions of non-stationary distorted signals were not completely resolved [1] [2] . This issue is particularly prominent in developing countries especially in China.…”