针对频繁投切操作对干式空心电抗器绝缘产生的影响, 为保障电力系统的安全稳定运行, 文中采用仿真和实验分析的方法, 对空心电抗器稳态和投切暂态下的电场和电动力进行分析.通过建立基于Maxwell的空心电抗器仿真模型, 进一步比较两种状态下电场和电动力的分布特性及数值变化.研究结果表明, 投切下的电场强度和电动力较稳态运行下均有明显增大, 绝缘厚度需要达到0.032 5 mm才能约束投切过程中产生的径向电动力.投切暂态过程对电抗器绝缘厚度提出了更高的要求, 为空心电抗器的工业设计提供了一定的理论依据.%For the influence of frequent switching operations on the insulation of dry-type air-core reactors, in order to ensure the safe and stable operation of the power system, the simulation and experimental analysis methods were applied to analyze the electric field and electrodynamics force of the reactor under steady state and switching transient state. The distribution and numerical changes of electric and electrodynamics force were further compared under the two states through the establishment of simulation model of Maxwell's air-core reactor. The results showed that the electric field strength and electrodynamics force under the switching operation were significantly increased compared with that under the steady state operation, and the insulation thickness needed to reach 0.0325 mm to constrain the radial electrodynamics force generated during the switching process. The transient switching process imposed a higher requirement for the insulation thickness of the reactor, which provided a certain theoretical basis for the industrial design of the air-core reactor.
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