Research on Peak Capacity of Distributed Photovoltaic Generation Based on Voltage Deviation Model in Distribution Network

Abstract:

Large-scale grid-connected photovoltaic generators will cause out-of-limit of voltage deviation. The model of voltage drop caused by loads and voltage rise caused by PV generators are established under different loads or PV distribution modes along the line, and the maximum allowable capacity of PV power injected into the grid without causing over-voltage is calculated, assuming the bus voltage deviation reaching the upper limit. The maximum PV penetration level of typical distribution lines is derived under the condition that PV generators is of the same distribution mode with loads, and the voltage margin at the head end of the line without causing over-voltage is proposed. The results show that over-headlines can carry much more PV power than cables, and over-voltage will be avoided by controlling the PV power according to the connected bus voltage, and suitably lowering the bus voltage will allow more PV to connect into the grid.

• Periodical: Applied Mechanics and Materials (Volume 734)
• Pages: 775-780
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.734.775
• Online since: February 2015
• Authors: Tian Tian Li*, Jiang Bo Wang, Wen Li Wang
• Keywords: Distribution Network, Peak Capacity, PV Generation, Voltage Deviation

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