Placement and sizing of utility-size battery energy storage systems to improve the stability of weak grids

Abstract

Parallel to the fast uptake of renewable energy sources (RESs) connected to the grid, the electric power industry has experienced a number of issues related to system strength and inertia. Battery energy storage systems (BESSs) have been proved effective in mitigating numerous stability problems related to the high penetration of renewable energy sources. This paper investigates the role of BESSs in mitigating the voltage and frequency stability issues in weak grids. We utilize a binary grey wolf optimization approach to define the locations and sizes of BESSs to improve voltage and frequency stability in a weak grid. Simulation results show that compared to existing solutions, significant improvements in terms of voltage and frequency stability can be achieved by implementing our proposed solution.