sistema e mÉtodo para compensaÇço digital de erros induzidos por freqÜÊncia e temperatura em um deslocamento de fase na detecÇço de corrente de medidores eletrânicos de energia

摘要

The phase shift in an electronic energy meter is compensated for by obtaining temperature (100) and frequency (200) readings in the meter and using these readings in a digital signal processor (DSP) (14) residing within the electronic energy meter. The frequency and temperature compensation is performed to each phase calibration and the result is stored in the DSP. To reduce the possible influence of noise in the system, the compensated DSP values are filtered (120) to provide a smoothing of the data.