Abstract: With the increase of distributed energy source and highly uncertain load in space-time distribution， the distribution network needs to be more flexible. In the planning of power distribution network upgrading and reconstruction， this paper proposes a matrix-based flexibility evaluation method from two dimensions of coping with multiple scenarios and meeting multiple objectives for different optional regulation methods. In the dimension of running scene set， K-medoids clustering algorithm is used to extract the typical scene set， and DS Evidence Theory is used to reduce the dimension； In the dimension of operational performance， the index system including new energy consumption， power loss and feeder balance etc. is proposed， and the dimension is reduced by using the Entropy Theory； Finally in the case of IEEE 33-node distribution network， the flexibility analysis of traditional regulation methods such as reactive power compensation capacitor and no-load tap changer and new regulation method such as Soft Opent Point is carried out， and finally Soft Opent Point shows higher flexibility according to the evaluation method.

Key words: distribution network flexibility, typical operation scenarios, indictor system, information comentropy, DS evidence theory