What is it about?
The paper starts with a short overview of grid requirements for photovoltaic (PV) systems and control structures of grid-connected PV power systems. Advanced control strategies for PV power systems are presented next, in order to enhance the integration of this technology. The aim of this paper is to investigate the response of the three-phase PV systems during symmetrical and asymmetrical grid faults. The performance of a three-phase grid-connected PV system under grid faults is investigated by performing simulations in Matlab and Simulink for a typical medium voltage (MV) distribution system, taking into account the factors of ambient temperature and solar irradiance, grid codes, power control strategies and utility grid conditions.
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Why is it important?
Our findings show that the photovoltaic (PV) array, the PV inverter and the point of common coupling (PCC) of the grid-connected PV system are perturbed by grid fault events. The impact of grid faults on PV systems depends on the fault type and less on the fault distance. Thus, symmetrical faults have a higher impact on PV systems performance than asymmetrical faults, both at the PCC and inside the grid-connected PV array.
Perspectives
In order to analyze the photovoltaic (PV) system during faults on utility power grid and to determine the effects of faults as a function of the location where the fault occurs, the simulation results are presented starting from the point of common coupling (PCC), followed by the voltage source converter (VSC) and boost converter and continuing with the PV array. The response and the comparison of the three-phase PV system operation during various types of short circuit grid faults such as symmetrical grid faults (three-phase faults) and unsymmetrical grid faults (unbalanced faults) are discussed and presented graphically.
Dr Ioan Viorel Banu
Universitatea Tehnica Gheorghe Asachi din Iasi
Read the Original
This page is a summary of: Study on three-phase photovoltaic systems under grid faults, October 2014, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/icepe.2014.6970086.
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