A 2-Step Multi-Energy Coupling and Substitution Reconfiguration Strategy for Distribution Network Restoration

The ever-increasing penetration of renewable energy impacts the network topology of distribution systems. Distributed generators (DG) perform well in powering the reconfiguration process. Nevertheless, they constraint the effectiveness of network restoration due to their limited capacity and unavoidable instability. Therefore, with DGs supporting the power supply during reconfiguration, this paper considers a 2-step strategy, which reduces the load pressure via the conversion of the load type in the integrated energy system (IES) before the traditional reconfiguration process. Firstly, models for distribution systems in IES were built featuring a high share of renewable energy by the source side and energy hubs (EH) by the grid side. Based on the multi-energy coupling mechanism, then, energy supply transformed to minimize the loads to be recovered with an interior point method. Afterwards, DGs powered the reconstruction and island partition based on second-order cone programming (SOCP). Finally, the effectiveness of the strategy was verified by test results of an IEEE 33 bus-system.