1) discrimination of rotor-angle instability and voltage instability
功角失稳与电压失稳的鉴别
2) voltage instability
电压失稳
1.
Analysis of the probability of voltage instability based on Thevenin equivalent parameters;
基于戴维南等值参数的电压失稳概率解析
2.
Mid and longer-term voltage instability are usually caused by the continuing increase of the load, and is characterized by a period when the voltage drop down quite slowly.
为理解中长期电压失稳现象的本质,采用小扰动分析法在系统特性曲线上展示静态特性不同的具体负荷的静态电压稳定域的确定过程,解释了失稳过程中系统电压稳定于低水平的现象,指出不同负荷在系统特性曲线下半支的稳定情况由负荷的静态特性所决定;在此基础上还讨论了目前两类截然不同的中长期电压失稳现象的机理解释,即无功功率和有功功率不平衡解释,指出这两种机理之间存在着紧密的联系和统一之处。
3.
In order to make up the deficiency of traditional analytical method used in the research of voltage stability problem, we need to know the probability information concerned with voltage instability.
为了克服传统分析方法在电压稳定问题研究中存在的不足,需要掌握与电压失稳现象相关的一些概率信息。
3) voltage weak stability zone
电压失稳区
4) oblate stability
压扁失稳
1.
The influence of deformation force and all kinds of technology parameters about cross rolling of hollow parts effect on oblate stability of cross rolling of hollow parts are analysed so that the standard of oblate stable is defined about cross rolling of hollow parts.
结合塑性铰的概念,用极值定理分析研究了空心件楔横轧的轧制力及各种工艺参量对压扁失稳的影响,从而确定空心件楔横轧压扁失稳的准则。
5) local instability
局压失稳
1.
Overbreak excavation instability and local instability are indicated on the phase of construction about soil nail wall on the base of different instability situation about two cases,when excavation beginning.
结合两个纯土钉墙工程实例,根据工程失稳时新开挖土层的不同失稳现象,提出了土钉墙施工失稳有超挖失稳和局压失稳两种类型。
6) compression instability
压缩失稳
1.
The numerical compression instability induced by the traditional kernel functions was discussed.
分析了传统的核函数产生压缩失稳现象的原因,提出了消除这种压缩失稳现象的一种新的核函数。
2.
It removes numerical compression instability which appears in corrective smoothed partic.
数值计算表明,改进算法可以提高自由面计算精度、克服拉应力不稳定性,避免了CSPM在核函数的影响域包含较多粒子且流场梯度很大时出现的压缩失稳现象。
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