Rapid voltage change (RVC) is one of the voltage disturbances classified under the term voltage quality and is included in several standards internationally but without a fully unique definition. This paper describes the Norwegian regulator's motive for introducing requirements for RVCs in the public electricity quality of supply regulation. Furthermore, a research project is described with focus on which rapid voltage changes that are visible in lighting. This project gave a sound basis for providing a unique definition on RVCs, and the definition is also presented. Finally, the paper describes the regulator minimum requirements for RVCs.
Quality of supply regulation is a growing area of interest in liberalized energy markets. An important basis for the quality of supply regulation and management is the documentation of existing quality levels. The documentation should be based on standardized terms for recordings and measurements. In Norway the interruption recordings are standardized from 2000 by using the fault and interruption collection tool FASIT. Voltage quality measurements are based on EN 50160. This paper presents results from six years of mandatory interruption recordings in Norway as well as results from the national voltage measurement program going on since 1992.
Electric vehicles (EV) are by many seen as an integral part of the transformation to a green economy, and are thus expected to increase in number. The charging of EVs is a new challenge to distribution networks and the possible impact of EV charging has recently come to the attention of network companies. This paper presents high resolution measurements of the network impact from EVs during slow and fast charging and some conclusions based on what the measurements indicates.
Power quality measurement integrated in energy meters are presented as a potential benefit by some manufacturers. The Norwegian regulator has considered making minimum requirements for energy meters to include registration of interruptions. SINTEF Energy Research has performed tests on energy meters with power quality measurement capabilities. These tests include the ability to detect interruptions, supply voltage variations, voltage dips, among others. Results presented in this paper show large differences in capabilities for power quality measurement of 'smart' energy meters. The results also show that the power quality measurements are not according to international standards for such measurements like EN50160 [1], IEC 61000-4-30 [2] and others.
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