Page 94 - Power Quality in Electrical Systems

Power Harmonic Filters 77

Source
impedance
Z u

Bus

Transformer
Z t

Bus

Z c
Filter reactor
Equivalent
motor load
Z m Filter capacitor

Nonlinear load
Figure 6.2 A power system equivalent circuit [6.2]. A motor
load, nonlinear load, and a filter reactor are part of a power
factor correction circuit.
[© 2004, IEEE, reprinted with permission]

Utility
6 source

4 I hs
I hc
ICC 7
I
t bc 2
I hR I hs
I hf 6
1 5 Power
I h v hc capacitor
3 M
8

G
Converter Filter Motor (equivalent) load
Figure 6.3 Electrical model of the system, including nonlinear load.