基于MIIF指标的多直流落点选择方法

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

为了降低多直流受端系统中直流间交互影响作用,保障系统的稳定运行,提出了一种基于MIIF指标的多直流落点选择方法。首先根据系统MIIF指标使用聚类手段进行系统分区,子区中的节点交互影响作用强,区间的节点交互作用弱;然后每条直流落点到一个区域,随机组合所有落点形成方案集合;最后以每个落点处抵御风险能力指标为目标,综合评估所有方案指标的整体性与均衡性,利用线性加权法筛选出最优落点方案。经过IEEE 14节点算例验证提出方法,结果表明此方法可以为规划运行人员提供筛选依据,筛选计算规模小,便于实际工程应用。

In order to reduce the interaction influences be-tween DC terminals in multi-infeed DC systems and ensure stable operation of system,a selection method of multi-in-feed 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 propor-tionality 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.