transmit electrical energy. Electric energy has many advantages. It is easy to use, clean, easy to transmit, concentrate and control, and easy to be converted into other forms of energy. It is an energy commonly used by all human beings. The power load is basically centered on cities, industrial areas, and residential areas, and power plants are generally built in river valleys, or areas rich in coal, oil, and natural gas, etc., away from users. Correspondingly, the high-voltage lines of each level undertake the task of sending the power generated by the power plant to the load center or connected to the substation in the power grid through long-distance transmission lines, so that the power can exert huge economic benefits on national production.
1. Match user power. The high-voltage power distribution line is determined according to the user’s power consumption, power consumption, and distance from the power supply. The distribution transformers and electrical equipment that send power from the power grid to users, or the original power supply grid, are obviously insufficient in scale and transmission capacity due to the development of the original power grid, and the newly erected ring network lines or multi-circuits play a role in supplementing power and adjusting power Allocate and ensure network lines with qualified power quality. At the current stage in urban and rural areas of our country, the voltage level of distribution lines is mainly 6~35KV. Only a small number of early-developed and fast-load-intensive areas are built. In order to ensure reasonable power distribution, 110KV high-voltage lines mainly undertake the task of power distribution. In foreign developed countries, many 500KV power line networks have also mainly played the role of power distribution.
2. Connect various areas of the power system to improve operational reliability and economy. In order to improve the safety and reliability of power grid operation and achieve maximum economic benefits, rely on high-voltage lines to organically connect various small power plants, power grids and power systems to become the largest power system; The high-voltage lines are connected to form a joint power system, and finally realize a unified national power system.
The parallel operation of power systems has incomparable advantages in economy and technology. High-voltage lines are responsible for connecting systems, connecting power plants, and exchanging capacity between systems, so that the connection between power systems can be strengthened. It can be seen that with the rapid development of science and technology and the socialization of production, the capacity of single generators and power plants is increasing. Electricity production tends to be more and more concentrated, and there will be more and more high-voltage lines connecting power systems or between various hubs in the system. This is the best proof of the tremendous development of the electric power industry.
