Abstract:Node vulnerability assessment plays a key role in risk warning and safe operation of distribution networks.To this end,a node vulnerability assessment method for distribution networks taking into account the equipment health index is proposed.Firstly,the health indices of the node equipment itself and the network are obtained from the equipment dimension based on the whole life cycle theory,so as to obtain the distribution network node vulnerability pre-assessment scheme.Next,in view of the radial characteristics of the distribution network,the improved assessment indexes are proposed in the system dimension based on the complex network theory and the risk theory.Then,the improved assessment indexes are utilized to carry out a re-identification of the node vulnerability pre-assessment scheme of the distribution grid in the equipment dimension,so as to obtain the node vulnerability assessment scheme of the distribution network.identification,and obtain the distribution network node vulnerability ranking.Finally,the IEEE 33 node distribution system is examplified,and the data analysis of the example results and the comparison of the results of other literature verify the reasonableness and feasibility of the method provided.