Power Quality Measurements in a Low-Voltage DC Microgrid in an Open Parking Garage

Low-voltage DC microgrids are becoming more widely acknowledged as a viable option as local extensions of the conventional AC distribution grid. Consequently, consistent definitions and measuring techniques of the parameters and criteria defining the power quality of these DC microgrids are needed, analogous to the traditional standards for AC electricity. An open issue in this aspect is the lack of available measurement results in real-world situations. In this paper, the results of a power quality measurement campaign performed in a unipolar 700 V DC microgrid in an open parking garage with currents up to 35 A are presented.