HARMONIC COMPENSATION USING A SYNCHRONOUS MACHINE WITH RESONANT FIELDCIRCUITS

This paper deals with a harmonic compensation method using a synchrono us machine with resonant field circuits. Recently, harmonics have beco me one of the major problems in power systems and a lot of methods of harmonic suppression have been studied. The authors have proposed a ne w method of harmonic suppression using a synchronous machine excited w ith the 6th harmonic current. This paper shows that armature inductanc es for the 5th or 7th harmonics decrease when the field circuits are c onnected to capacitors resonating at the 6th harmonic. The variations of armature impedances are explained theoretically by Park's equations . The optimal capacitances are selected so as to resonate with field i nductances for the short-circuited armature. The experiments to suppre ss the 5th and 7th harmonics using the synchronous machine are success ful.