Electrical Power System Harmonics Explained

In this video, Jim answers the question, “What Are Harmonics?”

What are harmonics and how do they get into the power system? Electrical power system harmonics are multiples of a fundamental frequency typically 60 Hz. or 50 Hz. Jim walks you through multiple harmonic wave graphs and the math of harmonics and frequency overlay and some of the distortion that can occur. Six-pulse waveform has a lot of different harmonics that make it up based on certain types of loads. Like certain types of drives, rectifiers, resulting in the input current resembling as if it’s pulsed in six separate pulses instead of a clean sine wave. Jim then goes into a diagram explanation of harmonics analysis. The way that most harmonics get into the power system is the load, if you have a load that is distorting, or pulsing, or changing the characteristic of a current, that current can be rich in harmonics.


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[akirk]

i was looking for harmonics relative to a song on guitar, and now my brain has flashburn.

[qzorn]

very interesting subject with all the inverters going on the grid.. wind, solar, ac motor-inverters, electric vehicle large battery charger inverters... dirty power, burn-outs. thanks...:)

[danh]

Would you happen to have any information on the workings of harmonics and spurious transmissions together?

[Djoker]

very beautifully explained .thankyou sir

[shanegee]

What does he mean about the 5th harmonic? Why are they numbered?

[muhammadnoumankhan]

Supoose if the load was continuously changing and it was becoming the cause of 5th harmonic now lets suppose if the load is turned off where will go that superimposed 5th hormonics based wave shape?

[danh]

If I have a 10MHZ signal that is meant to be a system clock, how will harmonics affect it if i know the 10mhz will keep its signal characteristics through out the system?

[bunhengsuoy]

Dear sir I have some question to ask you. I would like to ask you about industrial MV capacitor bank. I would like to write my thesis related to MV capacitor bank that install at 'Tiger beer brewery limited'. I would like to ask some recommendation or do you have some documents related to MV capacitor bank? Could you send it to me? What step that i should follow? What kind of methodology or procedure? Does detuned reactor function both as filter and irrush current limited?

Best regard

SUOY Bunheng