Multi-Infeed SCR Margin Evaluation Method Considering DC Terminal Location Selection

Multi-infeed short circuit ratio (MISCR) is an important index for evaluating the AC system capability interconnecting HVDC systems. With a view to analyzing the influence of the margin of MISCR on DC access, based on the MISCR established by the multi-infeed interaction factor (MIIF) based on the reduced Jacobian matrix. First, proposes the multi-infeed SCR margin index and the multi-infeed SCR margin interference index. Then, based on the method of constructing a weighted objective function, a method for evaluating multi-infeed SCR margin with consideration of DC terminal location selection is presented, and the procedure for applying this method to select the DC terminal location is provided. Ultimately, the proposed method's effectiveness is confirmed through simulation analysis of a 3-infeed 11-bus system. The findings indicate that the assessment approach suggested in this paper has the capability to quantitatively evaluate the multi-infeed SCR margin of the system and can be effectively applied to the selection of DC terminal location.