Correlation between total harmonic distortion of load and error percentage of kwh meter on inverter

Abstract

This study aims to describe the correlation between total harmonic distortion (current) of load and error percentage of kWh meter to overcome the electric circuit that supplied from inverter through digital kWh meter. The method used in this research was an experimental method with a design set that consists of an inverter connected to incandescent lamp as linear load through power qualty analyzer and digital kWh meter. Next, researcher observed and recorded the total harmonic distortion (current) and energy on the power quality analyzer that connected to the loads circuit for 1 hour. Then compared the energy measurement results with a digital kWh meter, calculated, and analyzed it as an error to be concluded the correlation between total harmonic distortion (current) of load and error percentage of digital kWh meter on the inverter. The load that presented by incandescent lamp affect to measurement of kWh meter. The energy that be consumed of load of 100 watt during 60 minutes is 102.99 Wh. Based on the measurement data, the average error percentage of kWh meter is 2.52% for linear load that caused by 2.85% of total harmonic distortion (current). The higher the total harmonic distortion (current), the higher the error percentage of kWh meter on the inverter that occurs is. And the equation of the correlation between total harmonic distortion (current) of load and percentage of error in kWh meter in inverter gives the R2 of 0,9236 that means the independent factors are not significant.