# Power Load Demand Forecasting Model and Method Based on Multi-Energy Coupling
## 2 Power Load Demand Analysis
### Multi-Energy Coupling Analysis
#### 2.2.2 Multi-Energy Coupling of Typical Scenarios
Finally, the energy cost of the system is reduced, and the total load demand is reduced while the output of the product remains. In this system, the coupling effect of multi-energy system is to improve the efficiency of energy utilization through multi-stage energy utilization and reasonable coordinated energy dispatching. The magnitude of the improvement in energy efficiency is largely related to the structural design of energy systems. Figure 3: Energy flow comparison diagram of high energy consuming enterprises. (**a**) No multi-energy coupling system; (**b**) Multi-energy coupled system. * Digital platform In this mode, the controllable power supply and load are controlled by a digital platform. It generally includes comprehensive control platform, adjustable load, energy storage equipment, power supply equipment, and so on. Its advantage lies in the use of information control system and artificial intelligence technology to give full play to the flexibility of the system. Take the demonstration project of alternating current charging pile in Yangzhou, Jiangsu province [35], China as an example. The region connects electric vehicle (EV) users, distributed energy, and energy storage devices through energy routers charging piles, which manage and connect external supply and load through the Internet of charging piles platform. Its structure is shown in Figure 4.  
In this demonstration project, when the charging pile energy router is connected to the electric car, it can both charge and discharge, and can both fast charge and slow charge. With the permission of electric vehicle owners, electric vehicles can be used as a special energy storage device with the controlling of the digital platform. In the process of distributed energy consumption, if too much electricity is generated, the digital platform can be used to control the fast charging of electric vehicles or the energy storage to store distributed energy in a timely manner. On the contrary, the power is absorbed through integrated control. The main body of the multi-energy system is the EV charging pile, while the charging pile is used as the media access system for other types of energy, including wind power, photovoltaic, energy storage, and distributed energy. Of cause, the scale of the connected device needs to be limited. In the process of operation, there may be imbalance between energy supply and demand, as for the instability of renewable energy. In this case, in addition to the energy storage system to meet the scheduling demand, EV charging pile operators can also achieve energy supply and demand balance through reasonable charging and discharging regulation of EV. This kind of system will have an impact on the power supply of the grid, but its fluctuation range can be controlled within a certain range. However, for the quarterly load forecasting studied in this paper, we can directly study the quarterly generation of various renewable energy sources and ignore the daily scheduling relationship between them.