The low-frequency instability in variable speed constant frequency doubly fed induction generator ( DFIG) widely used in wind power generation is investigated. 研究了广泛应用于风力发电的变速恒频双馈感应电机系统中的低频不稳定现象。
A problem in the determination of instability constant of colored complexes by Job method 关于用Job法测定有色络合物不稳定常数中的一个问题
Firstly, the linear method is used in analyzing the finite element model of the bridge, mainly computes the stability coefficient and instability mode of the bridge, considering the constant load, the wind load and the various disadvantage load. 在线弹性特征值分析中,主要计算了考虑恒载、风载、以及各种不利活载作用下的稳定安全系数以及失稳模态;
By means of model aggregation, the instability criteria of the discrete linear time-varying targe-scale systems with time-delays are reduced to those of the discrete linear constant systems with time delays. 并将滞后线性时变离散大系统的不稳定性通过模型集结简化为低维滞后线性定常离散系统的不稳定性的判定问题。
It is illustrated that the small time step may not contribute to the stability of the testing and too many interpolation points may result in the instability of testing when the time scale and time delay of the step response are constant value of the actuator. 稳定性研究结果表明,如果作动器阶跃响应时滞及时间相似常数一定,并不是积分步长越小越有利于试验的稳定性,而增大积分步长内的插值次数反而可能导致试验不稳定。