Feasibility of IEC 61000-4-7 Class I gapless implementation of harmonics measurement on low-cost microcontroller device

—This paper presents the implementation of gapless harmonic analysis on a commercial microcontroller device, according to IEC 61000-4-30 Class A and IEC 61000-4-7 Class I requirements. The final aim is to investigate the feasibility of accurate power quality (PQ) measurements with low-cost metering platforms, to enable the capillary diffusion of PQ monitoring for smart grids applications, including distributed generation, loads, electric vehicles and so on. Signal sampling and processing have been implemented on a commercial board used as case study. Experimental tests have been carried out to verify the feasibility of gapless harmonic analysis according to Standards requirements, in terms of both measurement times and accuracy.