电力系统的暂态安全问题主要是由大扰动引起的。

Large disturbances are the main threats to transient security of power systems.

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此方法能用于计算为提高电力系统暂态安全性而须付出的经济代价，经济代价可用于最佳可靠性指标研究。

By using this method the economic cost for improving system transient stability can be calculated, and the economic cost can be applied to the study of optimal reliability indices.

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以河南电网为例，采用暂态安全定量分析软件FASTEST计算了不同动态负荷模型比例时的暂态功角稳定裕度和临界切除时间。

The transient Angle stability margin and critical clearing time are computed by FASTEST under different proportion of dynamic electric load model using in Henan Power Grid.

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