Abstract: [Objectives] To solve the problem of safe operation of the new distribution network caused by the access of new energy sources with high penetration, and optimize the operation of multiple flexible devices combining soft open point and multi-type shared energy storage, the paper proposes a coordinated optimization method for soft open point and multi-type shared energy storage devices with consideration of the flexibility deficiency risk. [Methods] Firstly, the flexible regulation mechanism of soft open point and multi-type shared energy storage flexible resources is described, and the index of flexibility deficiency risk based on conditional value-at-risk is established. Secondly, considering flexibility, safety, and economic indexes, a coordinated optimization model for soft open point and multi-type shared energy storage devices in the new distribution network is established. Finally, the proposed method is solved on the improved 33-bus system to verify its effectiveness. [Results] The proposed coordinated optimization method for soft open point and multi-type shared energy storage devices considering the flexibility deficiency risk can effectively deal with the fluctuations of new energy output and the randomness of load demand, reduce active power loss and voltage violation risk of the new distribution network, and improve the flexibility, safety, and economic efficiency of the network operation. [Conclusions] The proposed flexibility optimization model will provide high practical reference value for flexible scheduling of new distribution systems.

Key words:

text-align:justify, "> new energy, new distribution network, soft open point, multi-type shared energy storage, flexibility, conditional value-at-risk