Modeling and application of we-energy in energy Internet

This study aims to propose we-energy (WE), which is a novel energy autonomous region. WE provides an energy management strategy for the local consumption of renewable energy, the plug-and-play of distributed generators, and the multi-energy complementation of production-consumption-storage integration. A quaternary model based on the information, physics, energy, and economic subsystems (Information-Equipment-Energy-Economical System, IEEES) was established to address the problems of multi-energy coordination and WE optimization under different operating conditions. Four operating modes of the WE were presented. Using the coupling characteristics of the abovementioned four subsystems, modal transformation was performed in accordance with the operational situation of the energy internet, and the corresponding state equations of the WE were established. The operation of the WE under several typical application scenarios, such as distributed optimization and coordinated control, was analyzed. An optimal marketing strategy between multiple WEs was established through economic optimization, which realized the appropriate allocation of energy sources inside the WE. Moreover, the coordinated control of inner devices of WE ensured the stability of both the parameters and energy exchange at grid-connected spots under fluctuating conditions.