查询词典 oscillation

Also a fatigue loss program is developed to evaluate each fault's fatigue loss. Then we use this method to research a real SC power system's shaft torsional oscillation problem.

最后建立一新型输电网络模型，研究新型的输电系统如串补输电系统故障对发电机轴系扭振的影响。

Based on the whole trip-reclosure process and considered the two important targets,the stability of power system and the shaft torsional oscillation of generators,a scheme of optimal trip-reclosure process were all proposed.

针对输电线路继电保护跳闸—重合闸电气操作全过程，综合考虑电力系统稳定性和发电机轴系扭振两项指标，提出了最佳跳闸—重合闸过程。

As the development of the power industry, the generator unit has larger capacity and the shaft becomes more flexible, also the interconnected power gird is huger and more complicated, which make the torsional oscillation problem between the unit and grid more and more notable.

随着电力工业的发展，一方面发电机组单机容量大型化、轴系柔性化，另一方面互联电网规模大型化、结构复杂化，这种趋势使得大机组和大电网的扭振相互作用问题突出出来。

A torsional oscillation observer based on the general observer was discussed to estimate the speed of the turbine generator. The dynamic characteristics of standard Luenberger observer with quantization effects were studied by Lyapunov stability criterion. It is concluded that the state estimate error can not asymptotically converge to zero in-the-large in presence of quantization effects.

讨论了基于状态观测器的汽轮机轴系扭振测量方法，采用李亚普诺夫稳定性判据分析存在量化效应的条件下标准龙贝格观测器的动态特性，指出由于数字系统中的有限字长效应会使观测器的跟踪性能恶化，估计误差不能在大范围内渐进收敛。

The torsional oscillation problem will make the shaft endure big torque time and again, which produces the fatigue life loss and even makes the shaft broken.

机网扭振相互作用会使机组轴系反复承受较大的扭矩，从而造成疲劳寿命损耗、甚至直接损坏。

Then we use IEEE First Benchmark system model and the 500kV system which contain 500MW and 600MW turbo-machines, as typical examples, the shaft systems without exciter in these examples are also analyzed on its impact on torsional oscillation.

首先对采用静止励磁方式的汽轮发电机轴系建模进行了说明；然后以IEEE次同步谐振标准模型和东北电网中伊敏电厂计划安装的500MW和600MW汽轮发电机组为典型算例，研究了改用静止励磁方式对轴系扭振的影响。

Axial-system torsional oscillation Hopf ramification Nonlinear dynamic state Characteristic root analysis

轴系扭振； Hopf分歧；非线性动态；特征根分析

So this part will propose a new method based on the EMTDC to analyze the torsional oscillation problem. Since the EMTDC only has the 7 masses shaft model, use the user Module to develop a detailed shaft model.

由于EMTDC现有的轴系多质量块模型最多只能考虑7个质量块，所以基于模态转换与模态降阶的思想利用EMTDC自定义模块重新开发轴系的多质量块模型，使得能对轴系各截面进行考核分析。

The dynamic viscosity of In-55wt﹪Sb hypoeutectic alloy melt was measured in a wide temperature range above liquidus in heating and cooling processes by using a torsional oscillation viscometer.

利用回转振动粘度仪在液相线以上较大温度范围内，测量了In-55﹪Sb亚共晶合金熔体在不同的升降温过程中的粘度。

A high torsional torque oscillation will build up on elastic shaft during the starting process of a large squirrel cage induction motor driving an inertia load.

另外，文中还探讨了软起动对于感应电动机起动过程中转轴扭矩振荡的影响。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。