Wind power grade and symbol

The following figure shows the wind grade symbol table:

Corresponding grades from left to right are: no wind, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9- 10, 165438. .

Extended data

Wind speed, its formula is "from all the way to the ninth level, each level is multiplied by 2." It means: from 1 to 9 winds, multiply each level by 2, and you can roughly get the maximum wind speed. For example, the maximum speed of the first wind is 2 meters per second, the second wind is 4 meters per second, the third wind is 6 meters per second, and so on. There are also transitional figures between different levels of wind, such as the first level wind 1-2 meters per second, the second level wind 2-4 meters per second, the third level wind 4-6 meters per second and so on.

According to the need, wind power can also be converted into corresponding wind speed, that is, the distance that air flows in unit time, in meters per second. The conversion formula is for reference: two to one is one, and three levels plus one. Grades four to nine are not difficult to calculate, and the series is reduced by two times three. Ten to twelve are rare, so ten is easy to remember. Ten-level wind speed is twenty-seven, with one more level every four levels. ?

That is, the wind speed of the primary wind is equal to 1 m/s, the wind speed of the secondary wind is equal to 2m/s, the wind level of the tertiary wind is added with 1, and its wind speed is equal to 4m/s, and the series from 4 to 9 is subtracted by 2, and then multiplied by 3 to get the corresponding wind speed. The wind speed algorithm from 10 to 12 is the same. The wind speed of 10 is 27m/s, and then the wind speed of 1 1 is 3 1m/s by adding 4, and the wind speed of 12 is 35m/s. ..

References:

Wind power rating table-Baidu Encyclopedia