Preventing voltage instability is an important aspect of safety and stability in power system.
防止电压失稳是电力系统安全稳定运行的一个重要方面。
Under this environment, voltage instability may result when reactive power support is insufficient.
在这一环境下，如果无功功率支持不足，就可能出现电压失稳。
A new calculation method for describing voltage instability coefficient based on model participation factors is proposed in this paper.
基于模式参与因子，提出一种新的电压失稳系数计算方法。
The high voltage direct current (HVDC) system connected with weak AC system is considered to be one of the causes for voltage instability.
与弱交流系统相连的高压直流系统被认为是引起电压不稳定的一个因素，评价交直流系统电压稳定性的方法相当复杂。
The voltage stability degree of a power system can be represented by that of the power transmission path, which is most prone to voltage instability.
电压失稳本质上是一种局部现象，系统的电压稳定程度可以由最易于电压失稳的功率传输路径的电压稳定性来表征。
Therefore, this paper proposes a method to calculate the probability of voltage instability based on the stochastic characteristic of load margin index.
针对这种情况，提出了一种基于负荷裕度随机特性的方法来计算系统电压失稳的概率。
The calculation results can be taken as the judging basis for the abundance of motor critical instability and critical voltage instability in power system.
所获结果可作为判断电力系统中异步电动机临界失步和临界电压失稳裕度的依据。
Considering the sensitivity of virtual nodal voltage to line reactance and variation of reactive power of power grid comprehensively, the voltage instability index is put forward.
综合考虑节点电压关于线路电抗和系统无功功率变化的灵敏度，提出了电压失稳指标。
The study of voltage stability about multi-infeed DC transmission systems is a new research field, so that voltage instability may probably threaten the security and stability of power grid.
多直流馈入输电系统的出现给电压稳定研究带来了全新的课题，电压失稳有可能成为这类电网安全稳定运行的最大威胁。
The study of voltage stability about multi-infeed DC transmission systems is a new research field, so that voltage instability may probably threaten the security and stability of power grid.
多直流馈入输电系统的出现给电压稳定研究带来了全新的课题，电压失稳有可能成为这类电网安全稳定运行的最大威胁。
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