The power margin index for Shanghai grid voltage stability is presented, and the time domain simulation checking method for the power margin index is discussed.

摘要介绍了上海电网电压稳定功率裕度指标，探索了电压稳定裕度指标的时域仿真校核方法。

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The power margin index for Shanghai grid voltage stability is presented, and the time domain simulation checking method for the power margin index is discussed.

阐述建立大受端电网电压稳定研究平台，提出“静态分析”与“中长期时域仿真”相结合的动态电压稳定工程分析新方法。

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By using the voltage stability analysis with uncertain factors of load variation considered in computation, more information about the critical point and the minimal power margin will be offered.

考虑负荷变化随机性的电压稳定分析方法可以更多地计及不确定因素，提供更丰富的电压稳定临界点以及最小功率裕度的信息。

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Power also thinks gross margin concerns are going to remain an issue.

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That would widen their margin of power before returns begin to roll in from the West, where Democrats hope to pick up as many as four seats in California, at least one and maybe two in Washington and one each in Utah and Montana.

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Rather, it will seek to defend and perpetuate the status quo, while expanding bureaucratic power and prerogatives at the margin.

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