More and more customers care about the harmonics, then what is harmonic, what is the harm of harmonic, now let me give you some introduction.
In a word, in electric power system, harmonic of current or voltage waveform is a sinusoidal wave whose frequency is an integer multiple of the fundamental frequency.
In the USA, this fundamental frequency is 60Hz, but in European and Asian markets, it could be 50Hz. In a 60Hz system could include 2nd-order harmonics at 120Hz, 3rd-order at 180Hz, 5th-order at 300Hz, etc. In a 50Hz system could include 2nd-order harmonics at 100Hz, 3rd-order at 150Hz, 5th-order at 250Hz, etc. Combined, they deliver an overall distortion to the fundamental frequency waveform .
Do you have a big question about how harmonics are produced?
Nonlinear loads produce harmonic frequencies with rapid switching, such as variable frequency drives, variable speed drives, rectifiers, servo drives, LED lighting, or saturated electrical machines like welding equipment. In the process of rectifying and inverting, due to the high switching frequency, high harmonics will be produced.
Is harmonics any harm to electric power system? Yes, it must.
As more and more power electronic harmonic generators are integrated into our electrical distribution network, electrical power systems will see more damaging harmonics.
Harmonics must have very serious consequences. If harmonics damage a sensitive device, may result in the production failure. The harmonics may result in the whole power supply down. Due to reactive power, phase imbalances, voltage fluctuation (flicker), and high harmonic current impacts, the power supply grid must experience interference or dangerous overloading.
If any way we could solve the harmonics? Yes, Noker Electric will help you to do this.
Xi’an Noker Electric is a professional power quality product manufacturer, providing active power filter, reactive power compensator, hybrid compensator and other solutions. If you have a power quality problem, please feel free to contact us.
Post time: Apr-15-2023