Accuracy of Electricity Metering and Monitoring Devices Under Industry-Typical Operating Conditions

In industrial electricity grids, an increasing number of applications coupled via power electronics, active energy recovery units, and renewable energy generation (e.g. photovoltaic) are connected. Additionally, it is common to utilize industrial energy monitoring and management systems including metering or monitoring installations within the industrial plant. The knowledge of distributed energy flows or local power demand allows companies to allocate energy costs to certain machinery or products, reduce energy costs, lower CO2 footprint or to establish a well-balanced energy distribution without bottlenecks in the factory. The accuracy of static (electronic) energy meters and industry-typical power monitors can deviate under distorted conditions as recent research work shows. The goals of this study are to establish a laboratory environment on NMI level (National Metrological Institute) to perform accuracy measurements for electricity meters and monitors under realistic conditions and to perform accuracy measurements on typical industrially used meters and monitors. To achieve the goals, first industry-typical load scenarios are measured and analyzed before test scenarios are developed, the test setup is realized and the accuracy of selected test objects under defined conditions is verified.