局域屏蔽防雷击有源防护装置的优化设计

摘要

Owing to the continuously upgrade of the electrization and integration level of the equipment, traditional lightning protection methods can not satisfy the increasing requirements of lightning protection. In order to improve the protective reliability against lightning of the ambulant equipments and highly sensitive areas, an active protection device for local lightning protection is proposed based on the principle of shielding and cancellation of electric fields. The genetic algorithm (GA) combined with the AIVSYS simulation model is adopted in the modeling and optimum design of the protection device. And the optimum radius of upper electrode and the intensities of excitation power supply under different lightning background fields are obtained. The calculating result shows that the work status of the protection device under the optimum solution tallies with the ideal protective state, which validates the creditability of the optimum results.%研究防雷装置性能优化问题,由于设备电气化和集成化程度的不断提高,但抗干扰和抗损伤能力不足,传统的防雷方法已不能满足日益严峻的直击雷防护形势的需求.为提高大型移动设备和电子敏感区域在直击雷防护上的可靠性,根据电场屏蔽与对消原理,提出了一种局域屏蔽式的防直击雷有源防护装置.利用遗传算法(GA)与ANSYS电磁场建立仿真模型,对不同雷电背景电场下有源防护装置的上极板半径和激励源强度的最优配置进行仿真.结果表明:有源防护装置在最优配置下的工作情况与理想的防护状态相吻合,验证了优化结果的可信性.