Vibration and Noise Reduction Method of 750kV Shunt Reactor Based on Optimization of Air Gap Structure

Abstract

Abstract The vibration noise issue is even more severe when compared to other power equipment because of the distinctive design of the air gap structure used in the 750kV ultra-high voltage shunt reactor. This research suggests an optimum design strategy for vibration reduction of a 750kV Ultra High Voltage (UHV) shunt reactor based on the study of the differential design of the iron core structure to address the issue of excessive vibration noise of this equipment. The 750kV UHV shunt reactor's electromagnetic-mechanical-acoustic field coupling model is first created, and the vibration and noise distributions produced by the iron core's combined magnetostriction and Maxwell force are analyzed and calculated; then, the simulation model of thirty distinct types of reactors with various air-gap architectures is built by modifying the arrangement of the length of the air gap of the iron core column. Then, by adjusting how the air gap lengths of the core columns are arranged, simulation models of 30 different types of reactors with various air gap structures are created. The effect of the air gap lengths in various core column regions on reactor vibration is then examined. The improved Hunter Prey Optimization (HPO) algorithm, with the inductance value being constant, determines the ideal air gap length of the iron core using the minimal vibration displacement of the reactor core as the objective function. The optimization method is crucial for reducing the vibration and noise of iron core reactors because the results show that the maximum reduction of the reactor's vibration displacement is 10.99%, the maximum reduction of noise at the measurement point is 9.2dB, and the change in inductance value is only 0.12% under the ideal core structural parameter.