Why Reactive Power Compensation?

Why Reactive Power Compensation?

Reactive power is not the useless power, in communication power supply system, the inductance and capacitance are indispensable load, ferromagnetic loads such as motors, transformers, if there is no perceptual reactive excitation, equipment cannot work normally, such as distance transmission line itself, is the capacitive load, as long as it is sending would be equivalent to a capacitor in work. That is to say, in the AC power supply system, the existence of reactive power is of great significance to the transmission and exchange of energy, which is indispensable. In other words, the exchange system without reactive power cannot work normally.

So where does a lot of reactive power come from? Generally speaking, the reactive power absorbed by many reactive loads in the system, especially the inductive reactive loads, is provided by the power plant, that is to say, when the generator is working, it will release the active energy to the system and provide the corresponding reactive energy to the inductive loads. It is necessary to maintain appropriate reactive power output when the generator is running. If there is no reactive power output, it will have a destructive effect on the power generation system. That is to say, it is very important to protect the reactive power balance of the system.

When the system reactive power demand, if not artificially system installation of reactive power compensation device, power plant phase modulation ways to increase the reactive power output, as a result of the generator capacity is limited, so the potential necessary to reduce the active power output, which is to reduce the output of the generator capacity, to meet the requirements of electricity, The capacity of generators, power supply lines and transformers needs to be increased, which not only increases power supply investment and reduces equipment utilization, but also increases line loss.

In order to reduce the reactive power supply pressure of the power plant, we put corresponding capacitors in the points of the power supply system that consume large amounts of inductive load to provide reactive power for the inductive load, thus greatly reducing the reactive power supply pressure of the power plant. Users should design and install reactive power compensation devices on the basis of improving the natural power factor of power consumption, and timely input or removal with the change of load and voltage to prevent reactive power back. At the same time, the power factor of the user reaches the corresponding standard, so as to avoid the power supply department to charge power rate. Therefore, whether for the power supply department or the power consumption department, automatic compensation of reactive power to improve the power factor, prevent reactive power back, to save electric energy, improve the quality of operation is very important.