Stand-by power: in a state of emergency, changes in the work load of the emergency power to run. Alternatperformance.

备用功率：在紧急状态时，变动负载工作的情况下应急运行功率。

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Electricity power limitation is an important measure to ensure safe operation of the system in the peak load power supply enterprise, or in a state of emergency.

推闸限电非供电企业反在背荷上峰或许者紧迫状况上，保证体解安齐运行的一项从要办法。

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In areas of poor power condition, where it's difficult to get an alternative power to supply class 1 load, an emergency power is required.

在供电条件比较差的地区，取得第二个电源供给一级负荷有困难时，也需要增设应急备用电源。

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Only as a last resort (Power Emergency) to avoid the risk of a complete blackout does ERCOT ask utilities to reduce demand by dropping load through rotating outages.

FORBES: Lights Dimming in Texas; Rolling Blackouts Likely