# 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  
With the rapid development of comprehensive energy at home and abroad, different types of multi-energy coupling utilization modes have been established in various places. This section analyzes three common multi-energy coupling utilization scenarios. Through analyzing these scenarios, we could conclude the most appropriate characteristics of the multi-energy coupling system, and analyze the key influencing factors of the multi-energy coupling energy supply. * Coupling utilization of renewable energy  
The easy access, clean and low carbon performance of renewable energy provides a foundation for its wide application in comprehensive energy systems. Wind power, hydropower, photovoltaic, distributed energy, energy storage, and other systems realize the development and utilization of renewable energy through multi-energy coupling, coordination, and complementarity. Take the grid-connected micro-grid demonstration project of Luxi Island as an example [34]. Built on Luxi Island off the southeastern coast of China's Zhejiang province, the project is equipped with wind power of 780 kW, photovoltaic power of 300 kWp, an energy storage system of 2 MW, and residents of the island are equipped with a small single-family distributed power supply of small fans, small solar panels, and batteries. The project is built into an intelligent power supply system through wind power generation system, photovoltaic power generation system, energy storage system, single-household micro-grid system, and energy monitoring and management system. Luxi is energy self-sufficient and has the freedom to operate off-grid or off-grid. For the Luxi Island project, the integrated energy system reduces energy demand for the grid through multiple forms of energy-coupled supply. Figure 2: Schematic diagram of power supply and demand structure in the case of multi-energy coupling. Renewable energy sources such as wind power and photovoltaic often have large output volatility and seasonal differences. Under the influence of the geographical environment, Luxi Island has relatively stable wind power generation, which can be used as the main power supply source. At the same time, the energy storage equipment and the distributed energy at the user's house provide a guarantee for its power stability, and it can operate independently under certain conditions, in which case the power grid is not required to provide power. Therefore, the production of renewable energy needs to be fully considered before the construction of this type of multi-energy coupling system, and the resulting energy supply of the multi-energy system will eventually affect the power supply of the grid. Energy conservation in energy-intensive enterprises  
Multi-energy coupling is often designed to achieve efficient and low-cost operation of the organization, mainly serving system functions. Therefore, many multi-energy coupling application scenarios are energy saving and consumption reduction. They improve energy efficiency through supply-side energy coupling or multi-stage energy utilization, so as to reduce energy consumption per unit product. Taking a typical industrial base as an example, the comparison of energy flow before and after the multi-energy coupling design is shown in Figure 3.  
Electricity is the most efficient type of energy, with the smallest proportion of energy loss. Coal and natural gas work by converting chemical energy into heat. In this conversion process, there is energy loss caused by energy conversion efficiency, and energy loss taken away by residue and waste gas after conversion [15]. Without multi-energy coupling design, its energy flow is shown in Figure 3a. In high energy consuming enterprises with multi-energy coupling, we could improve energy efficiency by using energy saving systems to generate power with residual heat and voltage, and realize cascade utilization of energy resources. Their improvements in energy efficiency are shown in yellow in Figure 3b.