Collection lines are one of the important components of wind farm design. Due to the complex topography of mountainous wind farms, there are few available places and large height differences, the design of power collection lines in mountainous wind farms is more difficult than in plain wind farms.
1 Tower design
In plain wind farms, due to the flat terrain, the horizontal pulling force of the tower is more considered in the selection of towers. In mountainous wind farms, due to the terrain characteristics of the mountains, the lines often have large height differences. At this time, while considering the horizontal tension in the design, it is necessary to focus on the longitudinal tension to avoid occurrence in areas with large height differences. The tower is "pulled" out of the ground due to longitudinal tension.
2 Long-distance crossings
In plains, long-distance crossings rarely occur because the sag does not meet the requirements. In mountainous wind farms, since the wind turbines are located on the top of mountains and relatively far apart, if conventional poles and towers are used to "detour" when crossing long distances, it will cause a lot of waste, which is reflected in this case. Long-distance spanning has advantages in the design of mountain wind farms. Utilizing the gap in the valley before the peak, long-distance crossings can be used to complete the connection of the lines. Since the height difference between the valley and the peak is very large, the sag requirement of the conductors can be met when crossing over long distances. Compared with the "bypass" option, the amount of work will be greatly reduced.
The reasons why natural and market conditions are not conducive to the construction of wind power bases
Good.
1. Good technical service. Shanghai Hanmeng Power Equipment Co., Ltd. is the world's largest manufacturer of small gasoline engines: the first-level agent of Briggs & Stratton Company (B&S Company) in China and the world's leading lubrication tool manufacturer. Leader: The Chinese agent of lubrication tools of LINCOLN Industrial Company of the United States, the world-famous brand of fluid transportation and metering: the Chinese first-level agent of Tuthill of the United States, and the industry leader in the field of industrial hose reels —A first-class agent of American Ruijie Company.
2. High power generation efficiency. The driven wind turbine does not have a gearbox, which reduces transmission losses and improves power generation efficiency. Especially in low wind speed environments, the effect is more significant.
1>Wind resource situation in one year, too small or too large is not good
2>Land price, related costs
3>Is the power grid of obvious use? The power gap will affect whether the power supply will be restricted in the future
4>Whether the road conditions are mountainous or difficult to transport and erect, it will affect the construction cost
5>Whether the geographical location is a disputed area in the administrative jurisdiction. It is related to whether there will be disputes such as local villagers causing trouble in the future
6>The stratigraphic environment, subsidence zones, earthquake zones, rock formations, etc. will greatly increase the difficulty and cost of foundation ring construction
7>Climate factors , factors such as excessive corrosion by offshore salt spray, rainy and humid condensation, high lightning and lightning, high altitude, high sand and dust, etc., will require higher technical requirements, increase construction difficulty, and increase costs.
Of course, no matter how many unfavorable conditions there are, there are ways to solve them. Man will definitely defeat nature.