Keywords
three-phase network
measurement errors
electricity metering
electricity consumption
angular error режими роботи електричної мережі
трифазна мережа
похибки вимірювань
облік електричної енергії
втрати електроенергії
кутова похибка
How to Cite
Abstract
One of the reasons of losses of the electric power caused by imperfection of means of its account is revealed. The analysis of errors of means of the account of active and reactive energy in the conditions of work of a network in low-sine and low-sine modes is executed. The dependences of the angular errors of the means of measuring active and reactive energy are found. The graph of the change of the angular error of the active energy meter in the range of phase shift angles between voltage and current from -90o to 90o and the graph of the angular error of the reactive energy meter in the range of phase shift angles between voltage and current from -0 degrees to 180 degrees are presented. The loss of active energy due to imperfection of active energy meters reaches infinity under the conditions of approaching the phase shift angle between current and voltage vectors to 90o, and the loss of reactive energy reaches infinity under the conditions of approaching the phase shift between current and voltage vectors to 180o are shown. The errors of active energy measurement are calculated, which indicate the unsuitability of electricity meters manufactured in accordance with existing standards for metering of electricity in low-cosine modes of network operation. References 14, figures 2, tables 1.
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