Composite Pin Type Insulators 42kV

Wuhan Line Power have six workshops and total building area is 30,000 square meters. Our company owns the most advanced 18000cc full automatic overall injection molding machines and the voice-operated displacement crimping machines. Our company built up a high voltage testing hall with 1000 kV power frequency experimental transformer,600kV steep shock wave,1800kV lightning  impulse test complete equipment, 40kN·m bending torsion testing machine, 2000kN tensile testing machine etc., and physical & chemical laboratory, electrical laboratory with complete set of equipment, and the testing area is up to 2,000 ㎡. We have the ability of inspecting the raw material and insulators, and performing routine test and sample test.

 Analysts said that in the next five years, the amount of investment in UHV is expected to reach 270 billion yuan, which is a full increase of 13 times compared with the 20 billion investment during the "Eleventh Five-Year Plan" period.

The national "Twelfth Five-Year Plan" announced on March 16, 2011 mentioned that "adapt to the requirements of large-scale cross-regional power transmission and new energy power generation grid integration, speed up the construction of a modern power grid system, and further expand the scale of west-to-east power transmission, Improve regional backbone power grids, develop UHV and other large-capacity, high-efficiency, long-distance advanced transmission technologies, rely on advanced technologies such as information, control and energy storage, promote the construction of smart grids, effectively strengthen the construction and transformation of urban and rural power grids, and enhance the optimal allocation of power grids capacity and reliability of power supply.” This will mean that the UHV power transmission project has been officially included in the national “Twelfth Five-Year Plan”.

Zhang Ke, an expert from the State Grid Development Planning Department, told China Business News that the future development of nuclear power, wind power, including hydropower as clean energy will depend on the construction of UHV power grids. Taking wind power as an example, the national planning of wind power will reach an installed capacity of more than 150 million kilowatts in 2020, but the installed capacity of the eight major wind power bases has already accounted for 80% of the total installed capacity, and five of them are located in the three north regions (North China, Northwest China, Northeast China), only Xinjiang, Gansu, Inner Mongolia, Jilin and other provinces and autonomous regions have installed wind power capacity of 80 million kilowatts, so there is a big problem in wind power consumption. Only with the help of the UHV power grid can such concentrated and unstable power be transmitted to the middle load centers in North China and Central China. He said that after the completion of UHV, wind power can be developed on a large scale and consumed with high efficiency, so that the once serious wind curtailment phenomenon can be controlled to 1%.

In an interview with Reuters, Zhang Zhengling, Director of the Development and Planning Department of the State Grid Corporation, said that UHV smart grids are necessary for the development of power in the Mainland. In the next five years, the State Grid will invest 620 billion yuan to build 20 UHV lines. To transmit hydropower from the southwest and wind power from the northwest to eastern China. The development of UHV power grid is not only a technological innovation, but also realizes long-distance transportation, solves the large-scale development and utilization of renewable energy in China, and can improve the current severe environmental pressure faced by the central and eastern regions.

The so-called UHV power grid refers to the transmission network with a voltage level of 1000 kV AC, plus or minus 800 kV DC and above. Its biggest feature is that it can transmit power over long distances, large capacity, and low loss. 76% of the mainland's coal resources are in the north and northwest, 80% of the hydropower resources are in the southwest, and more than 70% of the energy demand is in the central and eastern regions. The transmission distance of ordinary power grids is only about 500 kilometers, which cannot meet the transmission requirements.

The UHV power grid in the Mainland has completed one UHV AC line and two UHV DC lines, totaling 4,633 kilometers, and two AC and two DC lines are under construction, totaling 6,412 kilometers.

On October 7, 2015, the 6000 MVA 1000 kV UHV main transformer system with the highest substation capacity in China was installed in Suzhou. This marks the completion of the core project of the 1000 kV UHV substation with the largest scale, the highest transformation capacity and the strongest single power supply capacity under construction in the world.

The 1000 kV UHV Suzhou Substation is the first UHV substation in China to be built on the same site with two stations. The power systems installed in the first phase of the project serve Shanghai and Jiangsu respectively. In the future, the substation will build six sets of 3000 MVA main transformer systems, with a total substation capacity of 18000 MVA.

As an important node of the "Huainan-Nanjing-Shanghai 1000 kV UHV AC Power Transmission and Transformation Project", after the Suzhou substation is completed and put into operation, it will improve the clean energy and load acceptance capacity of the power grid in East China, enhance the ability of the Yangtze River Delta power grid to resist major faults and the power grid in Anhui Province. The reliability of the east transmission is of great significance.