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Study on fluid model of disconnector arc applied in very fast transient overvoltage

机译：在非常快速的瞬态过电压下施加隔离开关电弧流体模型的研究

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摘要

The essence of the mathematical model of disconnectors' multiple reignition arc is the repeated breakdowns of SF6. In this study, the kinetic properties of microparticles are studies based on the streamer discharge theory, and a fluid arc mathematical model applied in centimetre clearance is established. Ultra-High Voltage (UHV) disconnector manufactured by Pingao Electric Co. Ltd of Henan Province is selected as the object and the resistance change process of contact clearance multiple reignition arc is simulated by finite difference method-finite element method-flux corrected transport self-programming in MATLAB based on the chamber structure and operating characteristics. UHV gas-insulated switchgear very fast transient overvoltage (VFTO) test platform is built to gain the characteristics of VFTO waveforms generated by the disconnector's operation. Compared with simulation results, the test data shows that the fluid arc mathematical model can scientifically explain the dynamic development process of microparticles in the contact clearance and the calculation results are consistent with the test data. In addition, the arc fluid mathematical model combines the structure and operating characteristics of the switch with the development process of microparticles, which can better guide the design of the switch, and provide a theoretical basis for the suppression of VFTO with the disconnector itself.
机译：隔离开关的数学模型的本质是SF6的重复故障。在该研究中，微粒的动力学性质是基于飘带放电理论的研究，并且建立了厘米清除的流体弧数学模型。由河南省Pingao Electric Co. Ltd制造的超高电压（UHV）隔离器被选为物体，并通过有限差分法 - 有限元方法 - 通量校正传输自动模拟接触间隙的电阻变化过程。基于腔室结构和操作特性的MATLAB编程。 UHV气体绝缘开关设备非常快速的瞬态过电压（VFTO）测试平台，以获得通过隔离开关的操作产生的VFTO波形的特性。与仿真结果相比，测试数据表明，流体弧数学模型可以科学地解释了微粒在接触间隙中的动态开发过程，并且计算结果与测试数据一致。此外，电弧流体数学模型将开关的结构和操作特性与微粒的开发过程相结合，可以更好地引导开关的设计，并为抑制vfto与隔离开关本身提供理论依据。

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