Effects of Types of Faults on Generator Vibration Signatures
نویسندگان
چکیده
Generators are frequently subjected to high currents and voltages caused by electrical disturbances in the power system. Faults in particular subject the generator to stresses beyond its design limits and cause high temperature increase, amplify and distort air gap torques, and create unbalanced flux densities. Even more stressful as a consequence of faults are sudden loss of load, fault clearance and reclosing. Mechanically, the abnormal forces that are generated excite the rotor and as a result, amplify the shaft’s normal mode of oscillation. The objective of this paper is to present the results on the experiment conducted regarding the effects of selected types of electrical faults on generators vibration signatures. It aims to examine the generated vibration frequencies, changes in rotor shaft orbits and increase in vibration magnitudes as a result of faults.
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تاریخ انتشار 2002