1. Current Distortion – BAD juju Excess currents in distribution infrastructure –Heat –Wasted Power/Lost Revenue Shunt capacitors –High currents due to low reactance at harmonics –Undesired resonances Induced distortion of Voltage Waveform

2. Power Quality Guidelines IEEE-519 Consumers – Limit Distortion on load current waveform Utilities - Limit distortion of voltage waveform I sc /I 1 Odd HarmonicsTHD % H < 1111< h <1717< h <2323< h <3535< h <204.02.01.50.60.35.0 20 - 507.03.52.51.00.58.0 50 - 10010.04.54.01.50.712.0 100 - 100012.05.55.02.01.015.0 >100015.07.06.02.51.420.0

3. Rectifier Bridges