A method for calculating vibration and noise of an ultra-high voltage shunt reactor

Abstract

A method for calculating vibration and noise of an ultra-high voltage shunt reactor is provided. The method comprises the following steps: a process of generating vibration and noise of reactor is considered, and a reactor electromagnetic-structure-noise full process simulation process of multi-field coupling is established based on the finite element theory of multi-physical field coupling, andthe vibration noise of reactor is calculated. Various sizes and related parameters of UHV shunt reactor are obtained, and the three-dimensional model of the reactor with real data is established. In the transient magnetic field, the electromagnetic force acting on the reactor windings and the iron core is calculated by the imaginary displacement method. The frequency, amplitude and phase of the electromagnetic force acting on the reactor are obtained by FFT transformation. Taking the FFT transform electromagnetic force as the load excitation, the modal analysis and harmonic response analysis are carried out, and the vibration velocity and vibration characteristics of the reactor are obtained. Taking the reactor vibration velocity as the load excitation, the noise distribution of the reactor is obtained by noise analysis. The invention provides a theoretical basis for vibration suppression and noise reduction of the ultra-high voltage shunt reactor, and has good application value.

Description

technical field [0001] The invention belongs to the technical field of reactor multi-physics field coupling calculation, and in particular relates to a calculation method for vibration noise of an ultra-high voltage shunt reactor. Background technique [0002] UHV shunt reactors, as key equipment for improving voltage distribution and reactive power compensation, play a vital role in power systems, so large UHV substations are equipped with UHV shunt reactors. [0003] However, due to the huge capacity and high voltage of the UHV shunt reactor, coupled with its special structure and other reasons, it is easy to cause problems such as increased vibration and serious noise pollution. On the one hand, the increase of vibration affects the operation of the reactor itself, reducing the service life; on the other hand, the noise causes great disturbance to the environment and brings other problems. [0004] Existing methods are difficult to accurately judge and predict the vibrat...

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Problems solved by technology

[0004] Existing methods are difficult to accurately judge and predict the vibration and noise of reactors. This is because on the one hand, vibration and noise belong to the category of machinery, and the law of motion changes greatly; on the other hand, vibration and noise are difficult to predict, and engineering practice is more difficult.

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