利用冲击电弧能量抑制工频电弧建弧率的机理研究

Through the method of theoretical modeling, simulation and scientific experiment combining, cold cathode arc formation in the study on the impact effect of extreme compression condition and improve the arc voltage, arc path formed by controlling multiple mutation point to weaken the strength of arc, radial pressure by the arc into axial pressure and arc ,which is extremely compressed in the multiple arc inflection point, will longitudinal spray into the open space, that makes the arc rapidly expanding in multiple fracture, realize avoiding the arc renewed while cutting the arc. Study on coupling relationship between the impact arc that is compressed, bended, expansive cut or other factors and transient arcing construction process. Study on the general rule of energy, temperature, inhibition effect on characteristics of arc temperature characteristics, channel compression characteristics of transient arc, in order to achieve a very early in the transient power frequency arc to arcing process interruption of purpose. Research content: By impact arc with the skin effect and capable of directing the frequency arc discharge frequency characteristics of the channel, determine the path of the compressed shock arc having an arc control method to achieve the purpose of a plurality of the inflection point mutations; The compressed impact arc decouple and optimize radial pressure equation with axial pressure equation; United solving equation and transient arcing equation of accumulated impact arc energy, to determine the effect of inhibiting effect of the impact arc energy on transient power frequency arc.

通过理论建模、仿真与科学实验相结合的方法，研究冲击电弧在极度压缩条件下形成的冷阴极效应和提高电弧压降、通过控制电弧路径形成多个突变拐点以弱化电弧强度、通过电弧径向压力转换成轴向压力并在多个电弧拐点处将被极度压缩的电弧纵向喷射到开放空间，使电弧在多个断口快速扩大，实现在切断电弧的同时避免重燃。研究冲击电弧被压缩、弯曲以及膨胀切断等因素与暂态电弧建弧过程的耦合关系。研究冲击电弧的能量特性、温度特性、通道内压缩特性对工频暂态电弧抑制效果的一般规律，以实现在暂态工频电弧的极早期将建弧过程中断的目的。研究内容：利用冲击电弧具有集肤效应并能够引导工频电弧放电通道的特点，确定受压缩的冲击电弧的路径控制方法以实现电弧具有多个突变拐点的目的；受压缩冲击电弧径向压力方程与轴向压力方程的解耦及优化；冲击电弧的能量积累方程和暂态建弧方程的联合求解，以确定冲击电弧的能量对暂态工频电弧抑制效果的影响。

通过理论建模、仿真与科学实验相结合的方法，研究了冲击电弧在极度压缩条件下形成的冷阴极效应，以提高电弧压降、通过控制电弧路径形成多个突变拐点以弱化电弧强度、通过电弧径向压力转换成轴向压力并在多个电弧拐点处将被极度压缩的电弧纵向喷射到开放空间使电弧在多个断口快速扩大，实现在切断电弧的同时避免重燃。研究了冲击电弧被压缩、弯曲以及膨胀切断时与暂态电弧建弧过程的耦合关系。研究了冲击电弧的能量特性、温度特性、通道内压缩特性对工频暂态电弧抑制效果的一般规律，实现了在暂态工频电弧的极早期将建弧过程中断的目的。完成研究内容：利用冲击电弧具有集肤效应并能够引导工频电弧放电通道的特点，确定了受压缩的冲击电弧的路径控制方法，从而实现电弧具有多个突变拐点的目的；解耦、优化了受压缩冲击电弧径向压力方程与轴向压力方程；对冲击电弧的能量积累方程和暂态建弧方程的进行了联合求解，确定了冲击电弧的能量对暂态工频电弧抑制效果的影响。以自膨胀气流机理，生产了新型灭弧防雷装置的样机，并通过中试生产线生产了产品，在多地10kV配网和高雷害地区风电场35kV集电线路试运行，取得良好运行效果，大大提升了线路防雷有效性、安全性和经济性。