Harmonic Impact of Residential Type Photovoltaic Inverters on 11kV Distribution System
نویسندگان
چکیده
The number of installations of photovoltaic solar panels and associated inverter systems within residential premises is increasing. As these systems incorporate a power electronics front end, they will have an influence on the quality of supply in regards to voltage harmonics. This paper investigates the harmonic impact on an 11kV distribution system due to the installation of residential type grid connected photovoltaic inverter systems (PVIS). To characterise the aggregated harmonic current spectrum contributed from the low voltage system, a typical inverter spectrum is utilised. Conventional harmonic modelling techniques are applied to determine a medium voltage system model and resulting network wide harmonic voltages for various penetration levels of residential type photovoltaic inverter systems. Based on this study, a recommendation is made for acceptable penetration levels to limit the harmonic impact of grid connected photovoltaic inverter systems.
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