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<p>The 750 kV ultra-high voltage shunt reactor faces serious vibration and noise problems due to its unique air gap structure. Based on this, a method to reduce vibration by changing the core air gap structure is proposed. Firstly, an electromagnetic-mechanical-acoustic field coupling model of the reactor is established to analyze the vibration of the reactor caused by electromagnetic force and its noise distribution characteristics. Secondly, the influence of different air gap heights on reactor vibration is investigated by adjusting the air gap arrangement between the reactor cores. Finally, based on the simulation results, a polynomial model that can accurately predict the vibration displacement of the iron core is established. The Improved Hunter Prey Optimization algorithm is used to obtain the optimum air gap height of the reactor to minimize the vibration displacement of the reactor core while keeping the inductance value unchanged. The optimization results show that under the optimum core structure parameters, the reactor measurement point vibration displacement is reduced by 11.28%, the measurement point noise is generally reduced by 5 dB, and the inductance value changes by only 0.12%. The optimization method is of great reference significance for reducing the vibration of the reactor.</p>

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

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Yongzhi Min,
  • Yichen Huo,
  • Guo Wang,
  • Jianming Wu

摘要

The 750 kV ultra-high voltage shunt reactor faces serious vibration and noise problems due to its unique air gap structure. Based on this, a method to reduce vibration by changing the core air gap structure is proposed. Firstly, an electromagnetic-mechanical-acoustic field coupling model of the reactor is established to analyze the vibration of the reactor caused by electromagnetic force and its noise distribution characteristics. Secondly, the influence of different air gap heights on reactor vibration is investigated by adjusting the air gap arrangement between the reactor cores. Finally, based on the simulation results, a polynomial model that can accurately predict the vibration displacement of the iron core is established. The Improved Hunter Prey Optimization algorithm is used to obtain the optimum air gap height of the reactor to minimize the vibration displacement of the reactor core while keeping the inductance value unchanged. The optimization results show that under the optimum core structure parameters, the reactor measurement point vibration displacement is reduced by 11.28%, the measurement point noise is generally reduced by 5 dB, and the inductance value changes by only 0.12%. The optimization method is of great reference significance for reducing the vibration of the reactor.