Rural power grid transformation on the fast track
The General Office of the State Council recently forwarded the National Development and Reform Commission's "Notice on the implementation of a New round of Rural power grid upgrading Project Opinions during the 13th Five-Year Plan", proposing to implement a new round of rural power grid upgrading process.
The Notice proposes that by 2020, the rural areas of the country will basically achieve full coverage of stable and reliable power supply services, power supply capacity and service level will be significantly improved, the rural power grid power supply reliability rate will reach 99.8%, the comprehensive voltage qualification rate will reach 97.9%, and the household distribution transformer capacity will not be less than 2 kVA.
The new round of rural power grid transformation includes five aspects
First, accelerate the transformation and upgrading of new small towns, central villages power grids and agricultural production power supply facilities, and complete the transformation and upgrading of central villages power grids by the end of 2017.
The second is to steadily promote the diversification of rural power grid investment, and use commercial mechanisms to introduce social capital to participate in the construction and transformation of rural power grids.
The third is to carry out the construction of rural power grids in Tibet, Xinjiang and Tibetan areas in Sichuan, Yunnan, Gansu and Qinghai provinces.
The fourth is to accelerate the transformation and upgrading of rural power grids in western and poor areas, and the power supply service level in poor areas will be close to the average level of rural areas in the province (autonomous regions and municipalities) by 2020. Fifth, promote the process of equalization of urban and rural power supply services in the eastern and central regions, gradually improve the information, automation, and intelligent water bottle of rural power grids, and further optimize the power supply structure
Three measures to ensure the implementation of a new round of rural power grid renovation
"Notice" proposed: multi-channel financing; Strengthen the management of loan repayment funds; Deepening the electric power system reform and other policy measures; It is required to strengthen overall coordination, strengthen planning and management, and do a good job of supervision and evaluation to promote the smooth implementation of a new round of rural power grid upgrading projects during the "13th Five-Year Plan" period.
Current characteristics of rural power grid in China
The rural population generally lives more dispersed, resulting in rural electricity load is more dispersed, and agricultural production is seasonal, resulting in rural power grid load showing strong seasonal characteristics.
peculiarity
The load density is low and scattered;
Electricity consumption has seasonal characteristics, especially in dry season, which often causes excessive load of the power grid and leads to low voltage of the power grid.
Rural power equipment is only used for a small period of time throughout the year, and distribution lines are often in light load or out of service. This makes the comprehensive use of rural power network equipment less time, allowing intermittent power outages.
What does amorphous change apply to rural power grids?
Amorphous transformers are transformers made of amorphous materials instead of silicon steel sheets. Its outstanding feature is low no-load loss, no-load current is small, compared with the same model S9 series transformer no-load loss decreased by 70%~80%, no-load current decreased by 40%~60%, load loss decreased by 20%~30%, so it has a great energy saving effect.
The light load or no-load operation time of distribution transformers in China's rural power grid accounts for 70% to 80% of the total operation time, especially in dry areas irrigated by machinery Wells, the load variation gap is larger, especially suitable for the use of amorphous alloy transformers, which can produce huge energy saving potential.
Amorphous transformation will play two major benefits in the transformation of rural power grid
The energy saving effect and economic benefit of amorphous transformer are obvious, and its application in distribution network will effectively reduce the loss of distribution network. In line with the requirements of national industrial policy and power grid energy saving and
economic effects.
Consumption reduction, it is expected to become the leading product in the future transformer market.
According to professional estimates, if the amorphous transformer can completely replace the new S9 series transformer, such as 10kV distribution transformer annual demand according to 50 million kVA calculation, a year can save more than 10 billion kWH, economic and environmental benefits are considerable.
Amorphous operation can reduce the loss of huge amounts of electricity every year
The test of replacing 50 and 100kVA amorphous transformers in 4 low-voltage station areas of a company in Jilin Province shows that the load rate is generally about 20%~30%, and the peak load during agricultural irrigation is 70%~80%, which generally lasts for 2 months. After a year of operation, the replacement of the four stations of the amorphous alloy transformer, compared with the four S11 transformer stations with the same capacity and close load, the line loss decreased by 2% to 4%, and the annual loss of a huge amount of electricity was reduced, which significantly increased the benefit.
It can be seen that the use of amorphous alloy transformers in the process of rural grid transformation is ******, which can create higher economic benefits.
4 years to recover the investment of the amorphous difference taking the 100kVA transformer
The price of amorphous transformers is generally about 25% higher than that of S11 transformers of the same capacity.As an example, the S11 transformer is 17,500 yuan, and the amorphous transformer of the same capacity is 22,000 yuan, which is 0.45 million yuan more than the S11 transformer.
Taking a region in Jilin Province as an example, the agricultural power system has a total of more than 12,000 high-consumption distribution transformers below S7, with a capacity between 30 and 200kVA, and an annual sales of about 800 million KWH. If all the use of amorphous transformers, according to the average price difference of 3000 yuan, the need to increase the equipment investment of about 36 million yuan, according to the average transformer loss rate of 2% to 4% calculation, can reduce the annual power loss of 2400~3000kWh, can create benefits of more than 10 million yuan, do not need four years to recover the transformer price difference part of the investment cost.
Brief
An important link in the process of rural power grid transformation is the renewal and transformation of distribution transformers, which is related to the long-term economic benefits of rural power grid transformation. The loss of transformer operation is a problem that should be fully considered in the rural power network transformation. The selection of transformer is very important in the rural power network transformation.
Amorphous transformer is a distribution transformer with ideal energy-saving effect at present, and it is a trend to play a leading role in rural power grid transformation.
With the continuous in-depth promotion of China's "energy saving and consumption reduction" policy, the state encourages the development of energy-saving, low-noise, intelligent distribution transformer products. The future energy saving, material saving, environmental protection, low noise amorphous transformer will occupy an important position in the future distribution transformer field with its significant energy saving advantages.