ASSESSING THE INFLUENCE OF SOLAR POWER PLANT ON THE DISTRIBUTION POWER GRID OF VIETNAM

Abstract

Currently, renewable energy sources integrated into Vietnam's medium-voltage power grid are
developing strongly nationwide. Operational reality shows that the integration of renewable energy
sources into the distribution grid is causing power quality problems such as overvoltage, increased
capacity loss on the grid, and especially negative impacts on power quality to the working of the
protective relay system. This article analyzes and evaluates the impact of the Yen Dinh solar power
plant in Thanh Hoa, Vietnam when connected to the 22kV power grid such as: reverse power flow,
overvoltage, influence of harmonics, changes operational methods for placing economic capacitors
and coordinating protection when the plant is connected to the distribution grid are also calculated
and analyzed. The research results are based on the connection standards of the distribution grid and
use ETAP software for simulation. The results are analyzed, evaluated show that the applicability of
this research in practice.