Quality of the electrical supply on an electrical network

In practice, we see that these conditions do not always apply, basically due to two types of causes:

Generators and the distribution system have a certain internal impedance which causes voltage collapses and losses in the distribution system.

The loads absorb:

• transitory currents (start-ups and load connections)
• non-sinusoidal currents (non-lineal loads)

Sometimes the causes for the disturbances are external: atmospheric, all of which contribute negatively to the quality of the power supply.

This type of disturbance causes:

• An increase loss thus causing lower performance.
• Electromagnetic compatibility problems (EMC): poor operation or untimely stoppages to the system and cause significant efficiency losses to production systems.