Capacitor compensation cabinet, commonly known as reactive power compensation device, is mainly used to adjust the power factor in the power system, reduce reactive power, and improve power supply efficiency and power quality.
The main function of capacitor compensation cabinet is to improve power factor and reduce reactive power. In the power system, power factor is a key indicator, which reflects the ratio of active power to apparent power. When the power factor is low, it means that there is a large amount of reactive power in the power grid, which leads to reduced power transmission efficiency and increased power loss. By investing in appropriate capacitors, reactive power can be offset and power factor can be improved, thereby reducing power loss and improving equipment utilization.
There are two main methods to determine the capacity of the capacitor compensation cabinet: one is to estimate based on the transformer capacity, usually taking 20% to 40% of the transformer capacity; the other is to determine the compensation capacity by calculating the actual reactive power required by the electrical equipment. For example, for a 500kVA transformer, the reactive compensation capacity is generally designed to be around 150kvar.
In actual configuration, the selection of internal components of the capacitor compensation cabinet is very important. The main switch should use a fuse-type knife switch with protection function to ensure system safety; the selection of capacitors needs to be reasonably configured according to the actual load conditions and installation location. The capacity of a single capacitor is generally between 16-30kvar. In addition, the selection of components such as switching contactors, wires, and protective electrical appliances is also very critical to ensure the stable operation and maintenance convenience of the compensation cabinet.
Capacitor compensation cabinet plays a vital role in the power system. Through reasonable selection and configuration, it can significantly improve the efficiency of electric energy utilization and reduce energy consumption. In actual applications, accurate calculation and configuration should be carried out according to the specific power environment and needs to ensure the optimal compensation effect.
Most of the load types in the power system belong to the perceptual load, and the widespread use of power electronic equipment by power enterprises makes the power factor of the network lower.Lower power factor reduces equipment utilization rate, increases power supply investment, damages voltage quality, reduces equipment service life, and greatly increases line loss.Therefore, by connecting the capacitor compensation cabinet in the power system, the perceptual load can be balanced, the power factor can be improved, and the utilization rate of the equipment can be improved.
The function of compensation cabinet is to raise the line voltage and reduce the reactive power loss by using the parallel connection of capacitor when the current leads the voltage 90 degrees.The capacitor compensation cabinet is full of compensation capacitors and contactors, that is to say, it uses the phase-shifting principle of capacitors to compensate the reactive power loss generated by the equipment.General power failure or power supply does not need to operate, it can be with the opening and closing of the main power supply in parallel operation.Generally, as long as the attention to check at any time inside the capacitor has leakage or abnormal sound and other abnormal conditions can be.
Capacitive compensation cabinet compensates inductive reactance of inductance load by capacitive reactance.Reduce reactive current to achieve energy saving effect.
