Coordinated Optimal Allocation of DGs, Capacitor Banks and SOPs in Active Distribution Network Considering Dispatching Results Through Bi-level Programming

Abstract

Distributed generation (DG) is increasingly being integrated into distribution networks, and the coordinated allocation of controllable devices including capacitor banks and SOPs is an important issue. This paper proposes a coordinated optimal allocation method of DGs, capacitor banks and SOPs in active distribution network. Firstly, the multistate models of renewable energies and loads considering time-sequence are developed, in order to obtain the operation scenarios of the power grid and probability in different periods. Then, a bi-level programming model is established, in which a chance-constrained programming is embedded. The sitting and sizing of DGs, capacitor banks and SOPs are optimized in upper level considering minimum annual cost as objective. Chance constraint programming is embedded in upper and lower level to obtain the optimal results under a confident level because of the uncertain outputs of DGs. Simulations studies are performed to verify the proposed method.