Large generator end iron core fault electromagnetism simulating device

Abstract

The invention provides a large generator end iron core fault electromagnetism simulating device. The device comprises a real machine iron core, a main magnetic yoke and an auxiliary magnetic yoke; a left exciting winding and a right exciting winding are wound around the left and right sides of the main magnetic yoke; a middle exciting winding is wound around the auxiliary magnetic yoke body; the left exciting winding is connected with a left alternating current source, the right exciting winding is connected with a right alternating current source, and the middle exciting winding is connectedwith a middle alternating current source; on a static model, independent control over radial, tangent and axial component magnetic fields of the side section iron core is achieved, the large generatorend alternating magnetic field distribution under different working conditions can be simulated, and the influence of the radial peripheral magnetic field intensity on the penetration depth of the axial magnetic field, the relation among voltage between iron core pieces at different positions, the ventilating slot plate voltage and yoke magnetic density and punching orientation, the influence rules on the iron core safety and even the reasonable value range of the iron core magnetic intensity can be quantitatively researched.

Description

technical field [0001] The invention relates to the technical field of generator electromagnetic simulation, in particular to an electromagnetic simulation device for iron core fault at the end of a large generator. Background technique [0002] The end magnetic field of a real large generator is a difficult and hot issue in the electromagnetic field of large generators. The reason is that the end structure of a large generator itself is very complex, and the end magnetic field has three different properties and different influence components: radial, circumferential, and axial, and under different end structures and different operating conditions, these three The size and properties of each component will change, so it is difficult to design a static simulation device that simulates the independent changes of the three components at the same time, so it is difficult to study the effect of the radial and circumferential magnetic field strength of the end core on the axial ma...

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Problems solved by technology

The reason is that the end structure of a large generator itself is very complex, and the end magnetic field has three different properties and different influence components: radial, circumferential, and axial, and under different end structures and different operating conditions, these three The size and properties of each component will change, so it is difficult to design a static simulation device that simulates the independent changes of the three components at the same time, so it is difficult to study the effect of the radial and circumferential magnetic field strength of the end core on the axial magnetic field by controlling their changes. The influence of the penetration depth, the relationship between the voltage between the core pieces at different positions, the voltage of the ventilation slot plate and the magnetic density of the yoke, the relationship with the orientation of the punching sheet, the quantitative influence on the safety of the core, and even the reasonableness of the magnetic density of the core Important issues such as value range

So far, there are still no definite, rigorous, and proven research results on the above issues

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