Adaptive Service Restoration Strategy of Distribution Networks with Distributed Energy Resources and Soft Open Points

Abstract

Soft Open Point (SOP) is a type of power-electronic devices which can replace the traditional tie switches (TSes). This paper proposes an adaptive service restoration strategy by coordinating and optimal dispatching SOPs, Energy Storage (ES) Systems, Distributed Generations (DGs) and TSes to adapt to different combinations of load and DG output in the distribution network. With the convex relaxation approach, the service restoration problem can be transformed into easily-resolved second-order cone programming (SOCP). Finally, case studies on the IEEE 33-node system are used to verify the effectiveness of the proposed model and approach. For fault scenarios, the coordinated operation of SOPs, ESs, DGs, and closing corresponding TSes can realize the adaptive service restoration in an active distribution network.