Mains converterGrid stabilization and energy recovery
Switched, predominantly converter-fed devices such as electric drives generate harmonics and voltage drops. They also require reactive power.
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Grid connection point A - principle G generator, XN grid reactance (transformer reactance, reactance of the grid choke), u generator voltage, u`ver voltage distorted by load at A, PC parallel capacitors, SK suction circuits (n = 5, 7...ordinal number of the harmonic; "red arrow" = reactive power; "blue arrow" = active power