Expansion planning of active distribution networks achieving their dispatchability via energy storage systems

This paper presents a combined framework for power distribution network expansion planning (DNEP) and energy storage systems (ESSs) allocation in active networks (ADNs) hosting large amount of photovoltaic (PV) generations loads. The proposed DNEP ensures the reliable operation targeted ADN with objective achieving its dispatchability while minimizing grid losses by determining optimal to connect new nodes, reinforcement existing lines, ESS allocation. allocated ESSs compensate stochastic flows caused loads generation, allowing ADNs follow pre-defined schedule at connection point. constraints are modeled using modified augmented relaxed flow (AR-OPF) model that convexifies classical AC-OPF providing global exact solution OPF problem radial networks. problem’s complexity is handled employing sequential algorithm where nodes added one one, following priorities determined user. In each stage planning, Benders decomposition determines investments iteratively. Moreover, siting sizing problems associated line investment solved separately enhance convergence speed. Simulations conducted on real 55-node Swiss sizeable generation.