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風力發(fā)電機?the?power?flow?手工翻譯

Generally the absolute value of slip is much lower than 1 and, consequently, Pr is only a fraction of Ps. Since Tm is positive for power generation and since ωs is positive and constant for a constant frequency grid voltage, the sign of Pr is a function of the slip sign. Pr is positive for negative slip (speed greater than synchronous speed) and it is negative for positive slip (speed lower than synchronous speed). For super-synchronous speed operation, Pr is transmitted to DC bus capacitor and tends to rise the DC voltage. For sub-synchronous speed operation, Pr is taken out of DC bus capacitor and tends to decrease the DC voltage. Cgrid is used to generate or absorb the power Pgc in order to keep the DC voltage constant. In steady-state for a loss less AC/DC/AC converter Pgc is equal to Pr and the speed of the wind turbine is determined by the power Pr absorbed or generated by Crotor. The power control will be explained below. The phase-sequence of the AC voltage generated by Crotor is positive for sub-sync
提問者:網(wǎng)友 2018-07-22
最佳回答
通?;瑒拥慕^對值比1,并且,因而, Pr Ps的低僅分數(shù)。 因為Tm為電力發(fā)動是正面的,并且,因為ωs是正面和常數(shù)為恒定的頻率柵壓,Pr的標志是滑動標志的作用。 Pr為消極滑動(速度大于同步轉(zhuǎn)速)是正面的,并且它為正面滑動(速度更低比同步轉(zhuǎn)速)是消極的。 為超級同步速度操作, Pr被傳達給DC公共汽車電容器并且傾向于上升直流電壓。 為次級同步速度操作, Pr被采取在DC公共汽車電容器外面并且傾向于減少直流電壓。 Cgrid用于產(chǎn)生或吸收力量Pgc為了保留直流電壓常數(shù)。在穩(wěn)定為損失較少AC/DC/AC交換器Pgc與Pr是相等的,并且風渦輪的速度取決于力量Crotor吸收或引起的Pr。 電能控制下面將解釋。 crotor引起的交流電壓的階段序列為次級同步速度和陰性是正面的為超級同步速度。 這電壓頻率與柵格頻率和滑動的絕對值的產(chǎn)品是相等的。 Crotor和Cgrid有產(chǎn)生或吸收無功功率的能力,并且可能使用控制無功功率或電壓在柵格終端。
回答者:網(wǎng)友
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