Vertical shaft hub wind power technology invention Wind power may not need subsidies

Data show that as of the third quarter of 2015, China has connected 108.
85 million kilowatts of wind power to the grid, completing the "Twelfth Five-Year Plan" installation target
ahead of schedule.
As early as the end of 2010, China's grid-connected wind power surpassed the United States, ranking first
in the world.

However, although wind power has developed rapidly, its development is inseparable from government subsidies, and although wind power is strongly supported by the state, its inherent shortcomings still limit its development
.

For the horizontal axis wind turbine commonly used at present, on the one hand, with the increase of power, the sweeping area and blade length of the wind blade will increase, and the speed of the blade tip will also increase
.
Take the best-selling Siemens SWT-3.
6-120 as an example, its blade tip speed is already as high as 245 km/h
.
On the other hand, higher power means longer blades and taller towers, but the mechanical fatigue caused by the inertial forces of the blades and the alternating loads of their own gravity limits their length, and the higher the tower, the more difficult
it is to install and maintain.
Therefore, in recent years, the new installed capacity of domestic wind power has been dominated by 1.
5 MW and 2 MW models, and the market share of more powerful 2.
5 MW and 3 MW models has been stagnant
.

Compared with horizontal axis wind turbines, vertical axis wind turbines do not have its troubles, but vertical axis wind turbines also have huge defects
.
Because at the same power, the vertical axis wind turbine has a lower rotation speed than the horizontal axis wind turbine, it is more difficult to obtain electricity, and the cost is higher, especially for megawatt-level wind power generation
.
This is why the current megawatt-level wind turbines are almost all horizontal shafts, and the vertical axis is mainly used for off-grid independent small fans
.

The recently launched vertical shaft hub wind power generation technology can effectively make up for the shortcomings
of vertical axis wind turbines.
Liu Hangxian, its patent holder, said that once the vertical shaft hub wind power technology invented by him is commercialized, the cost of wind power will be greatly reduced, even lower than thermal power and nuclear power, and the wind power industry will no longer need government subsidies
.

A simple schematic model of vertical shaft hub wind power generation technology

According to reports, the core of this technology is to use the hub to directly draw power
from the linear speed of large vertical axis wind turbines.
Usually the vertical axis wind turbine always draws power through the generator located at the center of the circle, and the speed of the generator is the speed
of the wind turbine.
But in fact, even at very low speeds, the linear speed of large vertical axis wind turbines is still relatively fast, which can reach tens to hundreds of kilometers
per hour.
Therefore, if the hub generator is used to directly draw power to the circumferential speed of the vertical axis wind turbine, the volume of the generator can be designed to be smaller to effectively reduce the cost
of the generator.
At the same time, due to the large number of configurable generators, with the change of wind speed, some or all of the hub generators can also be selected for power generation, which improves the flexibility and reliability
of the scheme.

It is understood that at present, the technology has been reviewed by experts from China Wind Energy Association, Wind Energy Professional Committee of China Renewable Energy Society, Wind Energy Equipment Branch of China Agricultural Machinery Industry Association, Sinovel Wind Power, and Beijing Jianheng Certification Center
.
Experts fully affirmed the innovation of this concept, and suggested that the whole machine system data should be obtained through simulation analysis, principle prototype, etc.
as soon as possible, and accelerate the pace
of industrialization on the basis of verifying feasibility, safety and other issues.