Power Factor Correction: What Is It & Why Is It Used?

VOLTAGE OPTIMISATION VS POWER FACTOR CORRECTION

Two distinct methods are utilised to raise the effectiveness and efficiency of electrical power systems: voltage optimisation and power factor correction.

Voltage optimisation alters an electrical system's voltage level to best for the linked equipment and loads. The ideal voltage level can change depending on the equipment and loads, but it usually is slightly lower than the recommended voltage level. The system can utilise less power and reduce energy losses by lowering the voltage, saving money and reducing carbon emissions.

On the other side, power factor correction raises the PFCof an electrical system by incorporating components like inductors or capacitors. A low PFC may indicate that a system is not utilising electricity as effectively as it may be. The PFC is the ratio of real power to apparent power. By increasing the power factor, the system may use electricity more effectively and reduce power losses.

PFC and voltage optimisation can boost the effectiveness and efficiency of electrical power networks. Additionally, you can combine them to get even better results. They are utilised in various contexts and address various challenges. PFC is mostly used to increase the power factor, whereas voltage optimisation primarily decreases energy usage.

It is crucial to perform a power system study to establish which technique is more appropriate or whether both are required in a particular installation.

What is the process of power factor correction?

To correct any phase mismatches between the voltage and current in the system, a device like a capacitor or an inductor is added to the electrical power system. The objective is to increase the power factor, or the ratio of real to apparent power, and get it as close to unity as possible.

When the power factor is less than one, the system does not use all the power being supplied to it. This is frequently caused by inductive loads, like motors, which can induce a phase shift in the system's current and voltage. The phase shift can be fixed, and the power factor can be raised by adding a power factor correction device.

The most popular power factor adjustment devices are capacitors. They can swiftly release electrical energy when required because they store it in an electric field. The phase shift and power factor can be improved when a capacitor is connected in parallel with an inductive load.

There are two ways to use the equipment for PFC:

Capacitor Banks: Along with the load and the power system, capacitor banks are linked in parallel. When there is a power factor deficit, they store energy that the loads can consume.

Synchronous motors: These are connected to the load and the power system and function as generators to produce reactive power when there is a deficiency in the power factor. They are used to counteract inductive loads.

The size of the necessary corrective equipment will depend on the power factor value. A power system analysis is required to choose the best size and position for the power factor correction equipment. Read more.