Comparative analysis of measurement errors of electric energy meters in cold and high-altitude environments

Abstract

Electric energy meters are the most important measurement devices in State Grid. The measurement accuracy of electricity meters is related to the interests of users and the reputation of the enterprise, and the measurement error of electric energy meters is affected by various environmental factors, such as temperature and humidity. However, quantization of effects of complex working conditions on performance stability and measurement accuracy of the electric energy meters is few. In this paper, the basic error data of electricity meters running on site for more than one year in high and cold regions of Heilongjiang Province and high-altitude regions of Tibet Province are collected. The metering errors of the batches of electricity meters in the two test bases under the conditions of power factor 0.8C, current 0.1Ib, Ib and Imax are compared and analyzed. Finally, the trend of the variation of the errors of electricity meters under the condition of power factor 0.8C is analyzed with the combination of temperature and humidity. The results show that the measurement error of batch meters in the Heilongjiang base in spring, summer, autumn and winter was greater than that in the Tibet test base, especially in winter.