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Characterization of residential circuit impedance



DJ Anand, Md Amimul Ehsan, Wenqi Guo


Electrical harmonics associated with switching power electronics have been observed to induce electromagnetic interference with equipment sharing the same electrical circuit, some research studies have documented cases of malfunction and even damage of particularly sensitive equipment resulting from this interference. The harmonic spectra of commonly used switching power electronics in a residential electrical system have been profiled before. This paper provides a phenomenological characterization of the voltage and current transfer function (in the frequency range 20Hz – 100kHz) from purported sources of electrical harmonics to the point at which a utility meter is typically installed (also the point of coupling to the service transformer). This work also evaluates the impact of shunt capacitance close to the point of coupling, resulting in a complex zero in the transfer function and the consequent impact on phase margins of the system.
Proceedings Title
IEEE Innovative Smart Grid Technologies (ISGT) North America 2021
Conference Dates
February 16-18, 2021
Conference Location
Washington, DC, US


impedance measurement, transients, NZERTF, electrical power systems, smart grid


Anand, D. , Ehsan, M. and Guo, W. (2021), Characterization of residential circuit impedance, IEEE Innovative Smart Grid Technologies (ISGT) North America 2021, Washington, DC, US, [online],, (Accessed June 17, 2024)


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Created February 17, 2021, Updated October 23, 2023