The N-1 security criterion is a key principle for distribution operation in the background of smart distribution network. However

no N-1 criterion is taken into account in any existing distribution network reconfiguration model. The results obtained may not necessarily satisfy the security requirements. In order to solve this fundamental problem

a new multi-objective reconfiguration strategy for distribution network considering the N-1 security criterion is proposed. Firstly

three indices-average value

equilibrium degree and equilibrium ratio are defined to describe N-1 security based on the concept of security distance in the distribution system security region (DSSR). Secondly

the multi-objective reconfiguration model for distribution network is given with the aim of minimizing net loss and equilibrium ratio of security distance. Thirdly

the model is solved by the improved genetic algorithm and dynamic niche differential evolution algorithm. Finally

considering static reconfiguration and dynamic reconfiguration

the model proposed is compared with the existing model. The results show that the reconfiguration strategy can satisfy the N-1 security criterion and is better than existing models when considering economics and security of power systems

which prove the correctness and effectiveness of the model and solving method proposed. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2014AA051901) and National Natural Science Foundation of China (No. 51477112).