IV. HARMONIC COMPENSATION SYSTEM USING A
SYNCHRONOUS MACHINE
A. The Design of Harmonic Compensation System Using A
Synchronous Machine
Fig.4 shows a harmonic compensation system with
synchronous machine. The armature windings of synchronous
machine and nonlinear loads are connected in parallel to power
networks. The nonlinear loads supply the harmonic currents.
According to the harmonic current amplitude and phase in the
customers’ loads, harmonic current is excited in the field
windings by an active excitation system or passive one, which
can decrease the harmonic reactance of synchronous machine
and absorb most of the harmonic currents in the customers’
loads.