What is low-voltage reactive power compensation?
Apr 29, 2025| Reactive power compensation is a technology that plays a role in improving the power factor of the power supply system, reducing the losses of power supply transformers and transmission lines, enhancing the power supply efficiency, and improving the power supply environment. It is applied in the power supply system to increase the power factor of the grid.
To understand reactive power compensation, one must first grasp several concepts, namely "active power", "reactive power" and "power factor".
1. Active Power
Directly consume electrical energy and convert it into mechanical energy, thermal energy, chemical energy or sound energy. Utilizing these energies to do work, this part of power is called active power.
2. Reactive Power
Reactive power. Many electrical devices can only convert and transfer energy by establishing an alternating magnetic field. The electrical power required to establish an alternating magnetic field and induce magnetic flux is called reactive power. Reactive power does not do any work, but it will occupy the capacity of power transmission and transformation equipment and reduce the utilization rate of equipment.
In short, active power is the power consumed by the equipment and converted into other forms of energy. Reactive power is the power that maintains the operation of the equipment but does not consume energy. Reactive power exists between the power grid and the equipment and is an indispensable energy part of the power grid and equipment.
3. Power Factor
Power factor: It is a data used to measure the efficiency of electrical equipment (such as power transformers in the power grid, transmission lines, etc.) in using electricity. Power factor = Active power / Apparent power.
cosφ = P / [(P2 + Q2)^(1/2)], when Q is closer to 0, the power factor is larger.
The power factor is an indicator reflecting the proportion relationship between reactive electrical energy and active electrical energy in the electrical energy. The closer the value of this indicator is to 1, the closer the reactive power flowing in the power grid system is to 0, which can reduce the power loss caused by reactive power in the system.