Optimal Operation of Renewable Energy Bases Considering Short-Circuit Ratio and Transient Overvoltage Constraints

The increasing integration of renewable energy bases into power systems poses significant challenges for voltage stability and operational optimization. This paper develops an optimization model to maximize the total generation output in a renewable energy base while satisfying short-circuit ratio (SCR), transient overvoltage (TOV), and conventional operational constraints. To address the inherent nonlinearity of power systems, the trajectory sensitivities of SCR and TOV with respect to the decision variables are calculated, allowing the original nonlinear optimization problem to be transformed into a linear programming (LP) problem for efficient solving. Recognizing that the LP-based solution may not strictly satisfy all constraints during time-domain simulation verification due to system nonlinearity, the continuation method is introduced to ensure that a refined solution that satisfies all constraints is obtained. Case studies conducted on a real-world renewable energy base demonstrate the effectiveness and feasibility of the proposed approach.