THE BENEFITS OF AN INTEGRATED APPROACH FOR STABILITY-CONSTRAINED POWER SYSTEM PLANNING

Increasing penetration of inverter-based resources in today’s power systems necessitates a replacement for the role of synchronous generators in providing dynamic voltage stability and inertial response. Traditional power system planning approaches are typically sequential, where stabilising measures are integrated only at later planning stages, which can lead to inefficiencies. This study investigates the advantages of an integrated approach to power system planning, wherein stabilising measures are considered concurrently with the expansion of generation, transmission, and storage systems, underpinned by simplified stability constraints related to inertia and voltage stability. Findings indicate that employing this integrated approach significantly reduces system costs and highlights the potential of dual-use options, particularly grid-forming battery energy storage systems, over other stabilising measures like static synchronous compensators. The methodology employed extends previous work by incorporating constraints on dynamic voltage stability and comparing integrated and sequential planning approaches, thereby offering enhanced insights into effective grid connection regulations and the strategic siting of stabilising technologies.