针对电气化铁路变电所功率因数低，不能满足剧烈变化的牵引负荷对无功补偿要求的现状。

The power factor for the railway substation of the electrified railway is low and can not meet the conditions of severe tractive load to reactive compensation requirements.

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由于感性负荷的比例大，造成供电电网的功率因数低，损耗大。

Because of inductance loading is larger, the power factors of electrified wire netting are lower and the loss is higher.

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配电网中许多负荷功率因数低、波动大、变化快，传统的无功功率补偿装置很难起到理想的补偿效果。

Many load in distribution network has low power factor, fluctuates greatly, and changes fleetly. It is hard to achieve perfect compensation by traditional compensator.

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