浅谈沈阳地铁低压系统无功补偿

Talking about the Reactive Compensation of the Low Voltage System of Shenyang Underground

地铁设计及供配电系统设计均规定在降压变电所低压侧采用并联电容器进行无功补偿至功率因数0.9以上。但地铁系统在运行中,一般都不需要进行无功补偿。事实证明,在地铁低压配电系统中,无需采用电容补偿已满足供电系统对功率因数的要求。因为地铁无论是中压系统还是低压系统,是由大量电缆构成的,电缆产生的电容电流以完全可以补偿系统产生的电感性电流。下面说明一下过补偿的根源、危害及沈阳地铁的无功补偿。

The underground design and power supply and distribution system design are specified the low voltage sides in the voltage dropping substation to adopt shunt capactors to carry aut reactive componsation to power facter 0. 9 above.But in the underground system operation,reactive compensation is not needed. The fact shows that in the underground low voltage distribution system,no capactor compensation can meet the requirencent for power supply system power factor. No matter how medium voltage system and low voltage system,they are consisted of a lot of cables. The capacitance current roduced by cables can make up inductive current produced by the system. The next we talk about compensation origin and harm and the reactive compensation shenyang underground.