Analysis of Electromagnetic Characteristics of Synchronous Condenser Under Stator Inter-turn Short Circuit Fault

摘要

The magnetic field, vibration characteristics of stator and rotor, and circulating characteristics of stator parallel branch, of a 300 MVA large capacity synchronous condenser were researched in cases of the stator inter-turn short circuit fault. A stator inter-turn short circuit fault model was established using the finite element method. Secondly, using the Maxwell stress method and the simulated magnetic field data, the dynamic electromagnetic force of the rotor core before and after the turn-to-turn short circuit is calculated. The Fast Fourier Transform was used to extract the harmonics of the magnetic flux density. It provides a theoretical basis for the study of stator inter-turn short circuit fault on air-gap flux density, vibration characteristics of stator and rotor, and circulating characteristics of stator parallel branch, and provides diagnostic criteria for synchronous condenser fault monitoring.