Harmonic Filtration System
- Customer pickup,
- Courier
- In detail
the case of the perfectly sinusoidal waveform (as should characterize the voltage supplied by the utility) only the fundamental harmonic of the first order will be present, which in India has a frequency of 50 Hz.
If a sinusoidal voltage is applied to a load, the circulating current will also have a sinusoidal waveform only in the presence of loads with "linear characteristics".
In the presence of a "non-linear" load the current waveform will deviate from the ideal pattern and breaking down the wave according to the Fourier theorem will show evidence of harmonics whose number and amplitude will increase with the degree of distortion in the current waveform.
The increasingly frequent use of non-linear loads in industrial facilities (inverters, fluorescent lamps, welders, DC drives etc.) Creates elevated distortions in the waveform of circulating current.
This is true in the case of ac/dc converters, for which the input current theoretically displays only harmonics of the order.
h=mp±1
The parameter used to determine the level of harmonic distortion presents in an electrical network is THD of voltage & current.