Research On Technique Of Rotor Magnetism Extinguishing And Over-voltage Protection For Large Generator

This topic obtains from the degaussing side at first, carried on the analysis from the principle through the linear resistance, the nonlinear resistors and some other ways , compareing with their application feasibilities, we conclude that the nonlinear resistance of magnetism extinguishing and the extinguishing of arc grid magnetism are two ideal ways of magnetism extinguishing . while for the concideration of blocking the flow , magnetism extinguishing DM2 switchs which are used with the extinguishing of arc grid exsist inevitable shortcoming . Therefore, from consideration of two sides, the way of using the DMX magnetism extinguishing switchs and the non-ohmic resistor coordinated magnetism extinguishing will become an improvement general orientation in the field of magnetism extinguishing. Finally, take a Mount Taishan 310MW unit for example, to improve the system of magnetism extinguishing , and summarize the methods which coordinately used with non-ohmic resistor parameter, and these methods can offer important references to the skillful people who need these methods to improve the magnetism extinguishing devices to engines in the future.