Özet:

The paper analyzes the range of current from energy-efficient light sources (LSs), such as compact fluorescent lamps (CFLs) and light-emitting diodes (LEDs). The studied LSs exceed the standard values for the current harmonics, even with passive power factor correction. We have developed a methodology for calculating relative errors of active energy meters that measure the energy used by CFLs and LEDs and applied the methodology to determine the values of the relative errors of the induction and the digital meters. It is found that the errors of of both types of electricity meters for measuring power in the circuits with the tested LSs–CFLs and LEDs–exceed the maximum permissible errors by 3.0 % and 4.0 % respectively. Thus, when the load is a source of non-sinusoidal current, a consumer is overcharged for electricity. The values of errors in electricity metering can be reduced by eliminating the causes of the deteriorating quality of electricity, i.e. by supplying the lighting installations with energy-efficient light sources provided with active power factor correction.

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