Electric energy "generation, transmission, change, distribution, use" five links

I. Power generation

Overview of power generation

Power generation refers to the production process of converting water energy, fossil fuel (coal, oil, natural gas) heat energy, nuclear energy, solar energy, wind energy, geothermal energy, ocean energy, etc. into electric energy through power generation. It is used to supply the needs of various departments of the national economy and people's life.

2. Power generation type

Power generation power plants are divided into thermal power plants, hydroelectric power plants, nuclear power plants and other energy power plants according to the type of energy.

① Thermal power:

The use of coal, oil and natural gas and other fossil fuel energy generation is collectively referred to as thermal power generation: according to the power generation method, thermal power generation is divided into coal-fired steam turbine power generation, fuel turbine power generation, gas-steam combined cycle power generation and internal combustion engine power generation. Thermal power generation is now the main force of power development, in the present harmonious society, circular economy environment, we should focus on the direction of improving thermal power technology to consider the impact of electricity on the environment, the impact on non-renewable energy, although now in China has some nuclear power units, but thermal power still occupies most of the power market

② Water and electricity:

Hydropower is a comprehensive engineering facility that converts water energy into electric energy: generally including reservoirs formed by water retention and drainage buildings and hydropower station diversion system, power plant, mechanical and electrical equipment, etc. : The high water level of the reservoir flows into the plant through the diversion system to promote the hydropower turbine generator set to generate electric energy, and then input into the grid through the boost transformer, switch station and transmission line.

③ Wind power:

Wind power is the use of wind to drive windmill blade rotation, and then through the speed of the acceleration machine to increase the speed of rotation, to promote the generator to generate electricity. Based on current windmill technology, a breeze speed (the degree of breeze) of about three kilometers per second can start generating electricity.

Wind power generation is one of the most mature and large-scale power generation methods in the field of new energy, and the development of commercial development prospects. The development of wind power is of great significance to ensure energy security, adjust the energy structure, reduce environmental pollution, and achieve sustainable development.

④ Nuclear power:

Nuclear power plant is a new type of power station that uses the energy contained in the nucleus to produce electricity. Nuclear power plants can be divided into two parts: one is the nuclear island that uses nuclear energy to produce steam, including the reactor unit and the primary circuit system; the other is the conventional island that uses steam to generate power, including the turbogenerator system.

China's nuclear industry has been more than 40 years of development history, established from geological investigation, mining to component processing, post-processing and other quite complete nuclear fuel cycle system, has built a variety of types of nuclear reactors and has many years of safety "management and operation experience, has a professional complete, excellent technical team. The construction and operation of nuclear power plants is a complex technology. "Our country is now able to design, build and operate its own nuclear power plants.

⑤ Other energy generation: In addition to the above types of power generation, there are other energy generation:

Biomass power generation: A power generation method in which humans use organisms that can produce strong bioelectricity, and collect, transform and utilize the bioelectricity generated by them.

Tidal power generation: Use the potential energy of the water formed by the rise and fall of the sea tide to generate electricity.

Solar thermal power generation: The use of sunlight or heat, converted into European electricity generation.

Ii. Power Transmission

1. Overview of transmission:

Transmission is the transmission of electrical energy. It and power transformation, distribution, electricity together, constitute the overall function of the power system: through the transmission, the distant (up to thousands of kilometers) power plants and load centers are linked, so that the development and utilization of electric energy beyond the geographical restrictions, and other energy transmission (such as coal, oil, etc.) compared with the transmission of small loss, high efficiency, flexible and convenient, easy to control, less environmental pollution: Transmission can also connect power plants in different locations for peak and valley regulation. Transmission is an important embodiment of the superiority of electric energy utilization, and it is an important energy artery in modern society.

2. Transmission line composition: