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There has been a strong drive to enable Distributed Energy Resources (DERs), such as Photovoltaic generators (PV), Combined Heat and Power (CHP), and Electric Vehicles (EV), in large scale, at a residential level. One notable aspect of these devices is their size. Typical rooftop PV systems are in the range of 5kW-15kW, residential CHPs are in the range of 1kW-20kW, and EVs are in the range of 2kW-15kW. Most these DERs are interfaced by using front-end power converters, which may impact the distribution grid in the form of power quality degradation. To elucidate this concern, this paper presents measurements and analyses of common PV, CHP and EVs deployed in Canada, and compares their electromagnetic compatibility emissions with the limits prescribed by applicable standards. Despite their power electronics topologies and sophisticated switching control, these DERs are expected to have a small impact on the distribution system voltage supply waveform.
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Nassif et al. (2018) studied this question.