Measures for reactive power compensation of electricity-consuming enterprises

power consumption enterprise reactive power compensation method:

power consumption enterprises generally use parallel capacitors to stop reactive power compensation, in order to improve the power factor, reduce the current of the power supply line and reduce the line loss, but in practice, the compensation effect of different compensation methods is different.

① High-voltage capacitor reactive power compensation

has a significant effect on improving the total circuit power factor, but it is not as ideal as direct compensation for low-voltage power grids and electrical equipment for the power saving effect of enterprises.

② Low-voltage capacitor centralized reactive power compensation

centralized compensation is divided into fixed capacity compensation and automatic compensation, which can greatly explore the potential of transformer rated capacity and increase load capacity. The defect of low-voltage centralized compensation is that it cannot handle the activity of reactive current inside the low-voltage network, the investment is higher when the compensation capacity is large, and it is easy to make up at low load, resulting in reduced efficiency, and the equipment is often damaged due to the large impact surge in the process of switching.

③ reactive power local compensation

reactive power local compensation method can greatly reduce the current of the line, but for frequently operated equipment, due to the frequent impact of large current in a moment, capacitor damage is also easy to form. On the other hand, since the capacitor is switched on and off immediately, its effective application rate is also low.

④ Low-voltage decentralized reactive power compensation

has the advantage that it is more economical to switch, and local compensation capacitors can be shut down accordingly at low load to prevent overcompensation. Its defect is the need for manual frequent switching operation. When the switching is not timely or the switching capacity is not appropriate, it is also easy to form over-compensation or under-compensation.

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