Title :
Power factor measurement for rotating machines under system unbalance
Author :
Eren, Levent ; Devaney, Michael J.
Author_Institution :
Dept. of Electr. Eng., Missouri Univ., Columbia, MO, USA
Abstract :
Sequence powers are a form of electrical pollution for the vast majority of rotational loads, since these powers contribute to both line and machine losses. The negative sequence power resulting in counter-torque reduces useful work. Therefore, the negative sequence should be accounted for in the power factor calculations. In this paper, power factor is measured for a proposed power factor definition for treating unbalance under sinusoidal conditions. This is used to assess power quality at an industrial plant´s mains. In addition, this proposed sinusoidal definition is extended to assess power factor for three-phase machines operating under system unbalance
Keywords :
AC motors; machine testing; power factor measurement; power supply quality; counter-torque; electric motors; electrical pollution; negative sequence powers; power factor definition; power factor measurement; power quality; rotating machines; sinusoidal conditions; system imbalance; three-phase machines; Arithmetic; Circuits; Electric motors; Equations; Power measurement; Power quality; Reactive power; Rotating machines; Rotation measurement; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1999. IMTC/99. Proceedings of the 16th IEEE
Conference_Location :
Venice
Print_ISBN :
0-7803-5276-9
DOI :
10.1109/IMTC.1999.777035
