It is pointed out that the main aspect of electric power quality problem is voltage sag.

指出电压暂降是现代电能质量的主要问题。

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Electric power quality of wind park is a key index if wind park connects with public power grid.

风电场的电能质量是风电场并入电网运行的关键指标。

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Much attention has been paid to harmonics as it is a main factor impacting electric power quality.

谐波是影响电力系统电能质量的一个重要因素。

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The availability of affordable, reliable and high-quality electric power has begun to challenge these conventional considerations in a circuitous way.

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More than one third of all business downtime results from power quality problems, according to Electric Light and Power magazine.

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The bottom line is that electricity supplied by the power grid is increasingly incapable of providing the quality of electric service needed to operate an advanced economy.

FORBES: Perfect Power: Clean Energy's Killer App