What is the rural power grid maintenance fee?

According to the Interim Provisions on the Management of Rural Power Grid Maintenance and Management Fees of State Grid Corporation, the vascular fee refers to the reasonable fee necessary to ensure the normal operation of rural power grid, which consists of three parts: rural power loss, reasonable remuneration for electricians and rural power grid operation fee.

In rural areas and county towns, electricity is transmitted and distributed to users through the power grid. The power grid for rural power supply is called rural power grid. China's rural power grid is mainly composed of 1 10kV and below transmission and distribution lines and substations. The power supply for rural power supply mainly comes from large power systems, but also from various types of small and medium-sized power plants and generator sets. Rural power supply has the characteristics of scattered users, low load density, many small-scale electrical equipment, low natural power factor, strong seasonality of electricity consumption, few hours of equipment capacity utilization and high power supply cost. In some countries, the average transmission capacity of 6 ~ 20kV distribution lines in rural power grids is only about 1/20 of that in urban power grids. China's rural areas are vast, and the above characteristics of rural power supply are particularly obvious.

/kloc-rural power supply started at the end of 0/9. At first, small power stations or generator sets were used to supply power to small pumping stations for farmland irrigation. After World War II, the proportion of large power systems supplying power to rural areas has been increasing. By 1970, industrialized countries such as the Soviet Union, the United States, Japan, and European countries have mainly or almost completely supplied electricity to rural areas through large power systems. Since 1930s, electric lighting and electric pumping irrigation have been used in suburbs and counties of some big cities in China. However, the development of rural power supply in China is very slow. 1949 to 1957 combined with farmland water conservancy projects, a number of small hydropower stations were restored and built. At the end of 1950s, rural electrification began to be incorporated into the national economic construction plan, and the policy of giving priority to large power systems and supplying power to rural areas by large power systems and small hydropower stations accelerated the development of rural power grids and small hydropower stations.

China attaches importance to the use of small energy sources to generate electricity. The exploitable small hydropower resources in China are about 765,438+0,365,438+000 kW. There are 1104 counties with small hydropower resources exceeding110,000 kilowatts, which are mostly distributed in mountainous areas where the power system cannot be extended. Building small hydropower in these places can supplement the large power system to supply power to rural areas. Building a small thermal power plant with a single unit capacity of 750 ~ 6000 kilowatts in the pit of a small coal mine, using wind energy, biogas, geothermal energy and tidal energy to generate electricity, has also developed to varying degrees in China.

Before 1980, China's rural power consumption projects were mainly farmland irrigation and drainage, agricultural and sideline products processing and lighting. From 65438 to 0983, the construction of rural electrification pilot counties began in areas rich in small hydropower resources. The construction of pilot counties in power supply areas of large power systems is also under planning. At present, all kinds of electricity consumption at and below the county level are collectively referred to as rural electricity in China. Including rural electricity consumption and county electricity consumption. By the end of 1989, there were 229 1 county-level administrative districts with electricity in China [the standard is: the installed capacity of power generation equipment exceeds 1000 kW, the capacity of 35 (60) kV main transformer exceeds 1000kV/A or 3- 100 kV distribution. There are 654.38+43 million households with electricity, accounting for 70.2% of the total households in rural areas and counties.

China's rural power grid consists of 220, 1 10kV backbone network and 10kV distribution network. 10kV distribution network adopts three-phase three-wire distribution mode with ungrounded neutral point; In some rural areas with few telecommunication lines and less load, there is still a three-phase distribution mode with two lines and one place as the phase conductor. The three-phase single-phase hybrid distribution mode adopted by other countries is still in the trial operation stage in China. In the power supply area of small hydropower stations, small hydropower stations are interconnected to form a small power system with 35kV or 1 10kV lines as the backbone to supply power to counties or several counties. Some small power systems are also connected with large power systems.

The transmission and distribution lines in rural areas of China mainly adopt reinforced concrete towers, steel-cored aluminum stranded wires or aluminum stranded overhead lines. Some rural low-voltage distribution lines use simple plastic cable lines directly buried (commonly known as buried lines). The 35(60)kV substation adopts simple wiring mode, and there is no spare and light switch cabinet and necessary protection and control equipment. Large-capacity rural hydropower stations are equipped with synchronization devices, automatic voltage regulation and automatic speed regulation devices. Small capacity (single machine capacity below 500kW) power stations generally adopt manual regulation. Since 1980s, advanced and reliable electrical equipment, electronic technology and computer technology have been gradually adopted in rural power supply systems in some areas.