Model for modeling large steam turbine generator with function of static excitation

Abstract

The invention discloses a model for modeling a large steam turbine generator with a function of static excitation. The model comprises a static excitation subsystem model, an excitation winding subsystem model and a rotor shafting subsystem model; the static excitation subsystem model implemented by a modeling method considers ground capacitance of a neutral point; the excitation winding subsystem model considers the influence of input-output upon an end and excitation winding loss related to frequency; the rotor shaft system subsystem model considers ground capacitance of a rotor shaft and shafting impedance of a steam turbine. The output end of the static excitation subsystem model is connected to the input end of the excitation winding subsystem model. The output end of the static excitation subsystem model is connected to the input end of the excitation winding subsystem model. The output end of the excitation winding subsystem model is connected to the input end of the rotor shafting subsystem model. The static excitation subsystem model of the generator is established, the excitation winding subsystem model and the rotor shafting subsystem model are established, shaft voltage waveform produced by a static excitation system can be acquired for the generator in a simulation manner, and simulation analysis and research for control of shaft voltage is facilitated. The model has the advantages of simple structure, easiness in implementation and high precision.

Description

technical field [0001] The invention relates to a modeling model of a statically excited large turbogenerator, which belongs to the technical field of turbogenerators. Background technique [0002] As one of the core equipment of electric energy production, turbogenerator plays a very important task in the power system. The failure and shutdown of the generator will not only damage the expensive motor body, but also directly threaten the safe and reliable power supply of the power system. With the increase of the single unit capacity of the generator set, enough attention should be paid to the bearing pad damage accident caused by the shaft voltage problem. If no attention is paid to it and protective measures are taken, the shaft voltage is enough to break through the oil film between the shaft and the bearing and discharge occurs, causing damage to the motor components and accelerating mechanical wear. Unnecessary maintenance and loss of generation. [0003] In recent y...

AI Technical Summary

Problems solved by technology

If no attention is paid to it and protective measures are taken, the shaft voltage is enough to break through the oil film between the shaft and the bearing and discharge occurs, causing damage to the motor components and accelerating mechanical wear. Unnecessary maintenance and loss of generation

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