Critical clearing time (CCT) is one of the most important stable indices in power system transient stability analysis.
临界切除时间是电力系统稳定问题分析中最重要的稳定指标之一。
Quantitative indices should be used in the gradation of the participating factors. Critical biological indices should be used as much as possible for the main grades.
参评因素的分级指标应尽量采用定量指标，为分等定级提出定量依据，其主要级差应尽量利用有生物学意义的临界指标。
Then, this paper divides the existing evaluating indices into long term evaluating indices and critical evaluating indices.
其次，将现有的评价指标分为长期市场力评价指标和当日市场力评价指标进行分析比较。
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