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During the last few years, smart home devices have become increasinglypopular. Smart plugs, smart lights, and smart switches are now found in as manyas 37 percent of German households, and the popularity of these devices isrising. Smart devices sometimes also integrate sensors for measuring voltageand current. The increase in renewable generation, e-mobility and heat pumpslead to scenarios for which the distribution grid was not originally designed.Moreover, parts of the distribution grid are only sparsely instrumented, whichleaves the distribution grid operator unaware of possible bottlenecks resultingfrom the introduction of such loads and renewable generation. To overcome thislack of information, we propose a grid monitoring that is based on measurementsof widely available smart home devices, such as smart plugs. In the presentpaper, we illustrate the collection and utilization of smart plug measurementsfor distribution grid monitoring and examine the extent and effect ofmeasurement inaccuracy. For this evaluation, we analyze the measurements ofmultiple commercially available smart plugs and test the effect of measurementerrors on the monitoring when using a single smart plug.

Distribution Grid Monitoring Based on Widely Available Smart Plugs