HARMONIC FILTERS
Harmonic flows occur in power networks due to non-linear loads, such as computers, frequency converters and UPS equipment. When the level of harmonics in the network is so high that it may cause disruptions, a harmonic filter is needed.
HARMONIC FILTERS
Harmonic flows occur in power networks due to non-linear loads, such as computers, frequency converters and UPS equipment. When the level of harmonics in the network is so high that it may cause disruptions, a harmonic filter is needed.
POWER QUALITY ASSURANCE
As its name indicates, a harmonic filter is designed for a network with a high level of harmonics to improve the power quality by filtering out the harmonics. Among other things, the harmonic flows increase losses and cause malfunctions in electrical devices. In addition, the harmonic filter improves the power factor in the same way as a detuned filter capacitor bank. With moderate harmonics, using the less expensive detuned filter capacitor bank instead of the harmonic filter is recommended. A suspected high level of harmonics is confirmed by measurements.
Harmonics
Ideally, electric current and voltage follow a sinusoidal pattern. Some electrical devices cause distortions in the sine wave of the power network supplying the device. These distortions in the sine wave are called harmonics. Harmonics are multiples of the basic wave.
Sources of harmonics
Known sources of harmonics include frequency converters, switched-mode power supplies, thyristor switches, home and office electronics, UPS equipment, LED lamps and discharge lamps.
Harm
Harm caused by harmonics includes increased disturbances in the power network and the devices of the electricity users, as well as reduced capacity of the equipment. Harmonics also cause faulty meter readings as well as malfunctions of automation equipment and protective relays.
