Operation Optimization Method of AC/DC Feed-In Receiving-End Power Grid Considering Multi-Infeed Short-Circuit Ratio

With high voltage direct current (HVDC) technology development, large-scale sustainable energy fed into the receiving-end grid via HVDC reduces system strength. To address this problem, this paper proposes an optimal operation model for AC/DC infeed receiving-end grids considering MISCR constraints. This model aims to enhance sustainable energy consumption and minimize system operating costs, while comprehensively accounting for multi infeed short circuit ratio (MISCR) constraints, rational reactive power compensation allocation, and multi-source collaborative optimization scheduling. Case studies demonstrates the model's effectiveness in balancing grid stability and economy, improving receiving capacity. A practical engineering study confirms that rational reactive power allocation enhances voltage stability.