抽水工况

常规PSS在抽水工况下将产生负的电磁阻尼力矩，不能直接用于抽水蓄能同步电机；

It can identify generating or pumping state of pumped storage machine and change the sign of PSS gain accordingly .

抽水工况平均流速从0.96m／s增大至1.25m／s时，1~测点的最大应变为17～22με，谱密度无明显的峰值。

During pumping operation the maximum strains are subject to variation from 17 V - e to 22p e with velocity from 0 . 96m / s to 1 . 25m / s and there is no evident peak shown on the spectrum curves .

在抽水工况出流时水面没有明显的环流现象。

And there are no obvious circulation flows under the pumping condition .

在抽水工况根据水头的变化自动调整导叶和轮叶，使机组达到最高效率。

The governor regulates automatically the guide vane and the blade in pump operation , to provide the highest efficiency .

实现智能闭环开机，与传统的两段开机相比，开机过程与水头无关，且迅速平滑。在抽水工况根据水头的变化自动调整导叶和轮叶，使机组达到最高效率。

Compared with the conventional two-segment start-up , the intelligent start-up can make the unit achieve quick start-up , without over speed , independent with the head . The governor regulates automatically the guide vane and the blade in pump operation , to provide the highest efficiency .

对调压室在发电和抽水各工况下的过流特性进行了观测和分析，得到了堰流系数与相对淹没度的变化关系。

The relation between the weir flow coefficient and the variation of the relative submergence degree is obtained through the observation and analysis made on the characteristics of the flow regimes under the various operation conditions of both the generation and the pumping of the surge tank .

调相压水是抽水蓄能机组工况转换过程中及调相稳定运行的一个重要的组成部分。

The condenser dewatering is an important component of the condition conversion process and stable operation as condenser to pumped storage units .

以单机无穷大系统为对象，采用考虑阻尼绕组作用的动态稳定分析模型，对抽水蓄能电机在发电工况和抽水工况下的动态稳定性进行分析。

In the model of one machine infinite-bus system , the symmetry of the dynamic stability of pump storage machines under generator and pump operation conditions is proved in this paper based on the dynamic stability analysis .

抽水蓄能电机发电与抽水工况动态稳定性的对称性

The Symmetry of the Dynamic Stability of Pump Storage Machines under Generator and Pump Operation Conditions

风力发电机组数学模型分别对风力机、轴系、桨距角控制、异步发电机进行了建模，抽水蓄能系统数学模型则分别针对其发电工况和抽水工况进行了建模。

The wind turbine , shaft , pitch angle control and asynchronous generator are modeled respectively in the wind power model .