Photovoltaic power generation is the process of converting energy from sun into electricity through the photovoltaic effect on the semiconductor interface; wind powergeneration is the process of converting energy from wind into electricity.

Energy storage technology refers to storing power and heat. Currently, energy storage methods are mainly divided into three categories: mechanical, battery and electrochemical energy storage. Energy storage plays an irreplaceable role in improving power quality, grid stability and availability, achieving energy efficiency and enhancing the utilization value of renewable energy.

Smart energy integrates not only electricity, but also gas, cold, thermal and renewable energy such as solar, wind and air engery. Micro grid is a small power distribution system composed of distributed power supply, energy storage device, energy conversion device, load, monitoring and protection device, etc.

Electricity transmission refers to the main channel that transfers a large amount of electricity from a power plant or generation center to the area where electricity is consumed or the communication channel that transmits electricity between different power grids. Power distribution refers to the distribution means to distribute power to users for direct usage in the area of electric energy consumption.