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- The wind turbine is a highly nonlinear system.This paper discusses the control concept of variable speed constant frequency (VSCF) wind turbines and their performances above rated wind speed. 由于風(fēng)能的隨機性及氣動(dòng)效應的影響，變速恒頻風(fēng)力發(fā)電系統具有強非線(xiàn)性，難于實(shí)現高精度控制，輸出電能質(zhì)量較差。
- Three stages wind speed control. 三段風(fēng)速控制。
- The wind speed had to be just right. 風(fēng)速必須得恰倒好處才行。
- In an average wind speed 2.0 m / sec. 年平均風(fēng)速為2.;0米/秒。
- No leakage in the windows under wind speed of 60m/s or 216 km/hr. 風(fēng)速每秒60米(時(shí)速216公里)之風(fēng)力下，玻璃窗沒(méi)有漏水。
- Incline the wind meter to find the maximum wind speed direction. 運用風(fēng)速計去發(fā)現最大風(fēng)速及風(fēng)向。
- Close to the ground, wind speed increases quickly with height. 靠近地面,風(fēng)速隨高度迅速增大。
- DPi, DTi and WIi were dew period, dew temperature and wind speed. DPi，DTi，WIi分別代表露時(shí)、露溫和風(fēng)速。
- The spring wind speeds the greening of the plants. 春風(fēng)催綠。
- Surface roughness has a profound effect on wind speed. 地表粗糙度對風(fēng)速有相當深刻的影響。
- The exponent P is a function of wind speed, ground roughness, stability, etc. 指數P是風(fēng)速、地面不平度、穩定度等的函數。
- They can generate wind speeds faster than 250 mph. 龍卷風(fēng)的風(fēng)速可以超過(guò)時(shí)速二百五十英里。
- To define wind speed and direction look at the shadow of a cloud on the ground. 空中風(fēng)速及風(fēng)向可由云在地面影子判斷。
- Lying between these high-speed air streams are air streams of lower wind speed. 在這些高速氣流之間,會(huì )出現較低速的氣流。
- Wind speed measurements shall be made with a cup classified anemometer. 用已分好類(lèi)別的杯狀風(fēng)速計進(jìn)行風(fēng)速測量。
- Area of wind of big range ion, wind speed zephyr measures OK adjustment. 大領(lǐng)域游子風(fēng)區,風(fēng)速和風(fēng)力能夠調解。
- The average wind speed 1.3 m / s, the maximum wind speed 22 m / sec. 平均風(fēng)速1.;3米/秒，最大風(fēng)速22米/秒。
- They were subject to violent yawing at low wind speeds. 它們在低風(fēng)速下會(huì )發(fā)生強烈的偏離。
- "Wind speeds of over 70 miles per hour were recorded here. 他說(shuō)：“這里的風(fēng)速曾經(jīng)達到每小時(shí)70英里。
- Measure average wind speed by anemometer. Find out wind direction by light thread and compass. 用風(fēng)速計量度平均風(fēng)速,用一條輕的線(xiàn)和一個(gè)指南針找出風(fēng)向。
