1. Wind power
Wind power generation refers to the conversion of wind kinetic energy into electrical energy. Wind energy is a clean and pollution-free renewable energy, which has long been used by people, mainly through windmills to pump water, grinding, etc. People are interested in how to use wind to generate electricity.
The use of wind power is very environmentally friendly, and the amount of wind energy is huge, so it is increasingly valued by countries around the world.

2、Grid-connected photovoltaic power generation
Photovoltaic power generation system can be divided into off-grid photovoltaic power generation system and grid-connected photovoltaic power generation system, grid-connected photovoltaic power generation system than off-grid photovoltaic power generation system investment reduced by 25%. The photovoltaic power generation system in the form of micro-grid access to the grid operation, and the grid support each other, is an important technical way to improve the scale of photovoltaic power generation, photovoltaic power generation system grid-connected operation is also the main direction of future technological development, through the grid can expand the scope and flexibility of solar energy use.
Grid-connected photovoltaic power generation means that the direct current generated by solar modules is converted into alternating current that meets the requirements of the mains power grid by grid-connected inverters and then directly connected to the public power grid. It can be divided into grid-connected power generation systems with and without batteries. Grid-connected power generation system with battery has schedulability, can be incorporated into or withdrawn from the grid according to needs, but also has the function of backup power supply, when the grid power failure for some reason can be emergency power supply, photovoltaic grid-connected power generation system with battery is often installed in residential buildings. Grid-connected power generation systems without batteries do not have the function of schedulability and backup power, and are generally installed on larger systems.
Centralized large-scale grid-connected photovoltaic power stations are generally national-level power stations, the main feature is that the power generation can be directly transmitted to the power grid, and the power grid is uniformly deployed to supply power to users. However, this kind of power station has large investment, long construction period and large land area, and has not been developed much. The distributed small grid-connected photovoltaic, especially the photovoltaic building integration photovoltaic power generation, due to the advantages of small investment, fast construction, small footprint, and large policy support, is the mainstream of photovoltaic power generation.

3、Hydropower technical reform
Hydropower station in the process of technological transformation, its types are mainly divided into: first, local transformation (equipment in the major repair, repair, the structure of the local technical transformation to a certain extent, to further promote the processing efficiency of equipment "; The second is the complete renewal and transformation (with relatively advanced, high-efficiency equipment to further replace the old technology backward equipment, the third is the system transformation (to a certain extent, the corresponding technical transformation of the entire production process system, with good quality equipment, high-efficiency equipment, low-energy equipment, to replace the original old equipment, And in the production process of the new layout).