A great deal of electricity is used in pumping unit every year, which caused by load performance and the higher capacity used than actual need, and the electricity leakage.

抽油机每年需要大量的电能，由于抽油机的负载特性，所配电机的功率大于实际使用功率，使其效率很低，存在巨大的浪费电能现象。

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How meet to carry on a valid energy conversion with the electricity load need, focus had become indeed nowadays the electric power system to pay attention to increasingly.

如何符合用电负载需求进行有效的能量转换，确已成为当今电力系统日益关注的焦点。

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