Improving the system for registration of electric energy consumption

Abstract

Existing system for registration of electric energy consumption is based on the application of commercial power meters and/or measuring groups at each load/consumer. National standards stipulate that the power meters register active, and measuring groups register both active and reactive energy. These requirements give a correct picture of consumption in systems where linear loads dominate. Unfortunately, the needs of electric energy consumers have significantly changed in recent years, so the number of nonlinear loads has increased remarkably. Non--registration of distortion component of power causes losses in power system that are proportional to power and number of nonlinear loads. Measurement results of the consumption of different types of modern loads have confirmed our presumptions. Modification of built-in power meters and measuring groups is proposed, so that it easily fits into the existing system.