- #1
OliskaP
- 38
- 7
I have been thinking of this and can not seem to understand why nonlinear loads can be tought of harmonic current sources injecting current back into the grid?
For example if you connect a passive filter in parallel to attenuate the 5th harmonic, the 5th harmonic would flow between the filter and the load, and the supply do not need to supply 5th harmonic current.
I can not seem to understand why? How can the load produce harmonic currents? I have always been thinking that current flows from the source to the load, but then again its AC the current flows back and forth all the time.
Still, I can not figure out why non linear loads can be tought of current sources injecting into the grid instead of drawing harmonic current from the source.Best regards
For example if you connect a passive filter in parallel to attenuate the 5th harmonic, the 5th harmonic would flow between the filter and the load, and the supply do not need to supply 5th harmonic current.
I can not seem to understand why? How can the load produce harmonic currents? I have always been thinking that current flows from the source to the load, but then again its AC the current flows back and forth all the time.
Still, I can not figure out why non linear loads can be tought of current sources injecting into the grid instead of drawing harmonic current from the source.Best regards