Mains Voltage Dynamic Support by Means of Small Solar Power Plants
Abstract
The impact of small solar power plants on the depth of voltage sag is significantly dependent on the voltage level and grid impedance at the connection point. In this paper, we analyzed the contribution of small solar power plants to the depth of voltage sag in a low-voltage grid through dynamic support of the grid voltage. The approach that solves all the problems of grid-connected power plant operation simply by quickly disconnecting the power plant from the grid and bringing the distribution grid back to a passive state is no longer unconditionally acceptable, especially not when the share of power of these power plants at lower voltage levels becomes noteworthy. The ability of the power plant to maintain the stability of its grid-connected operation even in the event of a grid failure becomes highly desirable.
