Hormonics
Current harmonic in the network (multiples of fundamental current e.g., 5th 250 Hz, 7th 350 Hz) create:
– Voltage distortion when going through the feeding tranfoemer
– Heating of electrical components such as tranformers and motors
– Causes Tripping of the protechtion and control devices
– Abnormal amount of neutral currents
– Heat losses
Both current and voltage harmonics are often required to be within suitable ranges according to electrical syandards and recommendations. Harmonic voltage also improves via mitigating harmonic currents.

Reactive Power
– Reactive power consumes electrical network capacity
– Rapid changes create voltage fliker and voltage fluctuations
– Excess amount of reactive power might result in an unnecessarily-sized electrical feeder or generators
Excessive amount of reactive power can be penalized from the customer depending on local regulations.