SVG Configuration Scheme to Enhance Renewable Energy Accommodation Considering Voltage Stability Constraints in Renewable Power Grids

This study proposes an effective Static Var Generator (SVG) configuration scheme to enhance renewable energy accommodation while considering cost efficiency and voltage stability constraints. First, the multiple renewable short-circuit ratio (MRSCR) is employed as a voltage stability indicator, providing a computationally efficient representation of voltage stability constraints. Subsequently, a double-loop multi-objective optimization framework is developed to generate an optimal SVG configuration scheme. The hierarchical structure consists of: (1) an inner-loop optimal power dispatch model that determines the minimum curtailment of renewable energy under both voltage stability constraints and the SVG configuration provided by the outer loop; (2) an outer-loop multi-objective optimization model that simultaneously minimizes SVG configuration costs and annual renewable energy curtailment to establish the SVG configuration. Experimental validation on the SG-118 test system demonstrates the superiority of the proposed framework. Through a comparative analysis of MRSCR characteristics and renewable energy accommodation levels, this research presents an innovative SVG configuration methodology that effectively balances voltage stability maintenance with renewable energy integration enhancement.