查询词典 transient stability

The derivation of the method is papered in highly paralleled relaxed Newton method for transient stability real-time simulation-paralel algorithm.

关于该方法的导出在《基于高度并行松驰牛顿方法的暂态稳定性实时分析计算的并行算法》［1］中发表。

matlab sps is used to build a simulink model of single-machine infinite-bus system, and based on the simulink model, simulation on effect of pss suppressing small disturbances low frequency oscillation is carried on, and some methods of improving power system transient stability are simulated, including avr and pss, short circuit cleared rapidly, fault current limiter and single-phase auto reclose. the study unifies the simulink model to realize matlab and vb seamless integration using the activex technology, and demonstrated the matlab simulation result with the vb contact surface. this method of matlab and vb integration can make up the matlab contact surface unfriendly flaw and offers a reference for the design for cai of power system analysis course.

运用matlab电力系统仿真模块集sps构建了单机—无穷大系统simulink模型，对电力系统稳定器抑制电力系统小扰动低频振荡的效果进行了仿真；对提高电力系统大扰动功角稳定性的措施，如自动电压调节器及电力系统稳定器、快速切除故障、故障限流器、自动重合闸等手段的使用效果进行了仿真验证；并结合单机—无穷大系统的simulink模型运用activex 技术实现sps与vb的无缝集成，将sps的仿真结果用vb界面显示，较好地弥补了matlab用户界面不友善的缺陷，为《电力系统分析》课程进行cai设计提供了思路。

After flow and transient stability calculating of the 330kV grid, we got the over-load and hazard lines set. Then we gained the redundant network needed to be built according to the increasing power supply and load in 2010. Adopting regradation step-by-step algorithm by which we can improve the calculation efficiency , we compared the validity of every line, deleted lines with low validity until no redundant line is in the network. At last we got the target network framework adopting the improved ant colony algorithm. Flow distribution, construction investment assessment and target framework of Gansu long-term planning all be considered, from the viewpoint of to be economic and reliability the feasibility of the improved ant colony algorithm is discussed.

在对2006年该网架结构进行了潮流计算与暂态稳定计算分析后，得出了系统的过负荷与危险线路集，并针对2010年新增的电源和负荷点确定了冗余的待建网架，然后利用逐步倒推法比较各待选线路在系统中的有效性，逐步去除有效性低的线路，直到网络中没有冗余线路为止，以此来以提高优化算法的计算效率，最后利用改进后的蚁群算法确定优化后的目标网架结构，并从潮流分布、建设投资估算等方面与甘肃电网远期规划中确定的目标网架进行了比较，从可靠性和经济性角度论证了改进蚁群算法在网架优化中的可行性。

The system periodically evaluates the static security and transient stability based on on-line information, which is integrated by state estimation in EMS, the real time actual network data telemetered from control substations, and the typical network operation mode data, selects the optimum generators and load to be shed, accordingly to refresh the control decision tables in two different area control substations every 5 minutes.

河南电网多区域安全稳定紧急控制在线预决策系统综合利用EMS 在线数据、安控实测数据、电网典型运行方式数据，全面定量评估电网安全稳定性（暂态功角稳定和潮流越限），优化紧急控制决策并在线刷新多个区域安全稳定控制系统策略表。

A new method for fast valving decision to maintain multi-machine power systems transient stability by feedforward neural network is proposed.

这种输入和输出的选取是通过详细的理论分析，使输入和输出间呈连续函数关系，再经对输入量进行简化而决定的，从而应用前向神经网络的函数逼近功能说明了所提神经网络结构的合理性。

Power system ; transient stability ; excitation control ; robust adaptive control ; back-stepping

电力系统；暂态稳定；励磁控制；鲁棒自适应控制；反步法

Based on typical complex hydraulic system with upper and lower surge tanks, different models of hydro-turbine and conduit system used in power system transient stability analysis are presented.

以具有上下游调压井的典型复杂水力系统为对象，建立了用于电力系统暂态稳定分析的水轮机和输水系统不同形式的数学模型。

Hydro-turbine ; conduit system ; model ; transient stability computation

水轮机；输水系统；模型；暂态稳定计算

This thesis is focused on the study of contingency screening method of power system. The main work fulfilled is as follows. 1 Various performance indexes which represent severity degree of contingencies are proposed and analyzed. These indexes are gotten system state before and after contingency clearing obtained by the means of time domain simulation. They can be computed conveniently and immediately and can meet the need of online transient stability analysis.

论文针对电力系统的暂态稳定事故扫描的方法展开研究，主要完成的工作如下： 1提出并分析了能够表征事故严重程度的各种性能指标，这些指标利用时域仿真工具获得事故清除前后的系统状态计算得到，计算方便快捷，可用于事故的快速筛选和排序。

The PEBS method is improved to make it suitable for the transient stability analysis when the affect of exciters is incorporated.

对PEBS法进行了改进，使之能够分析考虑励磁调节作用的详细模型下系统的暂态稳定性。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了