Modern electrical equipment requires quality energy, so they demands strict requirements regarding the stability of the tension and quality energy .The trasmisision network must be harmonic free and other electrical disturbances..
If the harmonic filters are installed, several benefits will be achieved:
Higher power factor, better tension stability and lower losses in the network.
Harmonic filtering of the system.
Absence of resonance problems and amplification of the electrical disturbances.
A “clean” network imposes a much lower load on equipment, increases their durability, which means lower maintenance cost and the replacement of worn out equipment.
Problems that the harmonic may cause.
Higher losses, for example, the machines will work with higher temperatures and they might overheat.
Resonance problems between the inductive and capacitive parts of the transmission network.
Control system malfunction, since electronic measurement equipment, the relays, etc., they are sized for the fundamental frequency.
Sobrecarga de los condensadores, que deriva en mal funcionamiento y envejecimiento prematuro.Interferencias con telecomunicaciones y ordenadores.
Perturbaciones en los sistemas de control rizado.
Intensidades de corriente elevadas en los conductores neutros.
LasNon-linear loads such as: rectifiers, inverters, speed variators, ovens, etc., they absorb periodic non-sinusoidal currents from the network, these currents are formed by a fundamental component of 50 or 60 Hz frequency, plus a series of overlapping currents of multiple frequencies of the fundamental denominated harmonics. The result is a deformation of the current, and as a tension consequence, wich leads to a series of associated side effects.