most of the load types in the power system are inductive loads, and power companies generally use power electronic equipment, which makes the power factor of the grid low. the lower power factor reduces equipment utilization, increases power supply investment, damages voltage quality, reduces equipment service life, and greatly increases line losses. Therefore, by connecting the capacitor compensation cabinet in the power system, the inductive load can be balanced, the power factor can be improved, and the utilization rate of the equipment can be improved. In order to improve the energy waste caused by the low power factor of the power grid and these factors that are unfavorable to the production of power supply, the power factor of the power grid must be effectively improved. Obviously, it is unreasonable, and usually impossible, for these reactive powers to be provided by generators and transmitted over long distances. A reasonable solution is to generate reactive power where reactive power is needed, that is, to increase reactive power compensation equipment and devices. The low-voltage capacitor compensation cabinet consists of cabinets, bus bars, fuses, isolating switch fuse groups, capacitor contactors, lightning arresters, capacitors, reactors, primary and secondary conductors, terminal blocks, power factor automatic compensation control devices, panel meters, etc. Composition. In the actual power system, most of the loads are asynchronous motors. Its equivalent circuit can be regarded as a series circuit of resistance and inductance, the phase difference between the voltage and the current is large, and the power factor is low. after the capacitors are connected in parallel, the current of the capacitor will cancel a part of the inductor current, so that the inductor current is reduced, the total current is reduced, and the phase difference between the voltage and the current is reduced, so that the power factor is improved.

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