Simulative Asymmetry of the External Electromagnetic Field in the Case of Damage to Synchronous Generators

Abstract

The failure of high-power synchronous motors leads to significant financial losses. This is of great importance for synchronous generators operating in high-power electrical networks and having an effect on a great many consumers. Sudden failure of the high-power generator results in heavy fines and repair costs, malfunction of the power-supply systems, and electric users. Troubleshooting of the equipment is aggravated by many interrelated factors. The method of measuring the external electromagnetic fields, which is widely used for the induction motors, is not used in practice for synchronous machines. Installation of field sensors inside the synchronous machine is not always possible, and measurement of external fields has weak methodological and factual bases. Simulation of the synchronous machine allows tracing the connection of a particular defect with the distortion of the external electromagnetic field of the machine. Full-scale experiments show the actual feasibility of measuring the magnetic fields in the off-synchronous generator housing. Investigation of an external electromagnetic field’s connections with specific machine defects, development of field measuring procedures and processing of the measurement result, and uncovering the diagnostic properties characterizing the state of an operating synchronous machine and allowing making a required decision, is an important scientific and technical issue.