PV installation for grid-connected distribution system in Savannakhet Province, Lao People's Democratic Republic

Author(s): Thavy Khamchaleuna, Chayada Surawanitkunb, Arkom Kaewrawangc
Faculty of Engineering, Khon Kean University, Khon Kaen, Thailand
Faculty of Applied Science and Engineering, Khon Kaen University,  Khon Kaen, Thailand
Department of Electrical Engineering, Faculty of Engineering, Khon Kean University, Khon Kaen, Thailand
International Journal of Smart Grid and Clean Energy, vol. 9, no. 4, July 2020: pp. 737-745
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.4.737-745

Abstract: Currently, renewable energy is used to connect the grid power system because it is the clean energy and environmental friendly. It is getting worldwide attention such as solar photovoltaic (PV) and is used to generate electricity by stand-alone and grid-connected. The size and the position of the PV are important for installation. Therefore, the aim of this paper is the focus for analysis of PV installation in three positions with the grid-connected distribution system. The PV installation was established by varying capacity of PV considered 100% of the load at 9.46 MW. The DIgSILENT Power-Factory software version 15 was used for system simulation. The voltage in each bus of all cases increases for this analysis. The reactive power flow decreases and reverses to the external grid from 9.46 to -0.27 MW. The current in the 3rd bus to the external grid is reduced from 0.26 to 0.02 kA. The active power losses and reactive power losses are lowest in case of 25-25-50% and 0:50:50%, respectively. This research is the guideline to install the PV for grid-connected with medium voltage system in Lao People's Democratic Republic (Lao PDR) for planning the future policy.

Keywords: PV generation, distributed generation, power loss, voltage profile
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