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Power Quality Issues Concerning Photovoltaic Generation and Electrical Vehicle Loads in Distribution Grids

Smart Grid and Renewable Energy 2015年第6期6卷 164-177页

作者： Jaan Niitsoo paul taklaja Ivo Palu Joni Klüss Department of Electrical Power Engineering Tallinn University of Technology Tallinn Estonia Department of Electrical Engineering and Automation Aalto University Helsinki Finland

The high utilization level of renewable generation including residential photovoltaic (PV) systems together with the uncontrolled charging of electric vehicles (EVs) can have a significant impact on load characteristics in distribution networks. Harmonic content of PV generation, EV charging loads, and their influence on power quality indicators in residential distribution networks are discussed in this paper. For investigating likely power quality scenarios, PV generation and EV charging measurement results including current harmonic amplitude and phase angle values are used and compared with present load characteristics. Different modelling scenarios are analysed and a simplified model of harmonics in PVs and EVs is offered. The results of the study show moderate additional harmonic distortion in residential load current and voltage distortion at the substation’s busbar when PV generation and EV loading are added. The scenarios presented in this paper can be further used for modelling the actual harmonic loads of the PVs and EVs in distribution networks.

关键词： Current Measurement Distributed Generation Electric Vehicles Load Modelling Photo Voltaic Power Quality Power System Harmonics

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Power Quality Issues Concerning Photovoltaic Generation in Distribution Grids

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Smart Grid and Renewable Energy 2015年第6期6卷 148-163页

作者： Jaan Niitsoo Marek Jarkovoi paul taklaja Joni Klüss Ivo Palu Department of Electrical Power Engineering Tallinn University of Technology Tallinn Estonia Department of Electrical Engineering Tallinn University of Technology Tallinn Estonia Department of Electrical Engineering and Automation Aalto University Helsinki Finland

Unregulated utilization of renewable generation including residential photovoltaic (PV) systems can have a significant impact on load characteristics in distribution networks. For improving PV generation capabilities, power quality aspects have to be coordinated with present load characteristics. This paper discusses the harmonic content of PV generation and the influence to power quality indicators in residential distribution networks. PV generation measurement results including current harmonic amplitude and phase angle values are presented. Results of different modelling scenarios are analysed and a simplified model of harmonics in PVs is offered. The results of the study showed a moderate additional harmonic distortion in residential load current and voltage distortion at the substation’s busbar when PVs were added. Novelty of the paper is that harmonic current values at higher orders are presented and analysed. The results pointed out in this paper could be further used for modelling the actual harmonic loads of the PVs in distribution networks.

关键词： Current Measurement Load Modelling Photo Voltaic Power Quality Power System Harmonics

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