Experimental Investigation of Power-to-Voltage Sensitivity Profiles of Residential Loads for Load Management Studies

The power-to-voltage sensitivity of a load describes how power consumption depends on changes in voltage magnitude. It is a critical system characteristic used for power system control actions such as conservation voltage reduction and voltage-led load management. Voltage sensitivity depends on the operating state of loads, which can vary over time. However, the time-varying characteristic of voltage sensitivity is often ignored in power system analysis and has been considered as a constant parameter. This paper seeks to contribute to filling this gap by experimentally analyzing the time-varying voltage sensitivity profiles of 21 common residential appliances with a sub-minute time scale resolution, conducted in a 60 m² apartment-like laboratory. The obtained sensitivity profiles, provided as an open-access dataset, can be used as building blocks that allow a flexible synthesis of voltage sensitivity profiles for complex aggregated residential loads. In addition to the individual load profiles, a typical daily power profile for a 2-person apartment was experimentally reproduced to study the voltage sensitivity profile of an aggregated residential load.