Selection Method of Multi-infeed DC Dropping Location Based on MIIF Index

In order to reduce the interaction influences between DC terminals in multi-infeed DC systems and ensure stable operation of system, a selection method of multi-infeed DC dropping location is proposed based on MIIF index in this paper. Firstly, the system is partitioned by clustering method according to the system MIIF index. The interaction influences between nodes in the same sub-region are strong, and the interaction influences between nodes from different sun-regions are weak. Then, each DC terminal is located in one sub-region, and the schemes set is formed by random combining all dropping nodes. In the end, the resisting risk ability is regarded as the objective, the integrity and proportionality of all schemes are comprehensively evaluated, and the linear weighted method is used to filter out the optimal placement scheme. The method is verified by the example of IEEE 14 buses system. The results show that the method can provide the basis for the planning and operation personnels, and the calculation is time saving, which is convenient for the practical engineering application.