CAJ | 학술논문

根据上下湿污表面交流局部电弧特性的差异，建立了交流污闪电压双电弧计算模型。为获得模型参数，测量了三角形玻璃板上下表面的局部电弧，分别获得了上下表面局部电弧的静态伏安特性和重燃条件；利用高速摄像机对局部电弧进行观察，得到了上下表面弧道半径与泄漏电流峰值之间的关系；同时，研究了Π型玻璃板装置闪络过程中局部电弧延伸过程，发现上下表面局部电弧弧长均随泄漏电流峰值线性增加，弧长增量之比与表面盐密有关，由此获得了上下表面弧长之比与表面盐密的关系式。结果表明：该双电弧模型可以较为准确地计算交流绝缘子的污闪电压。
근거상하습오표면교류국부전호특성적차이，건립료교류오섬전압쌍전호계산모형。위획득모형삼수，측량료삼각형파리판상하표면적국부전호，분별획득료상하표면국부전호적정태복안특성화중연조건；이용고속섭상궤대국부전호진행관찰，득도료상하표면호도반경여설루전류봉치지간적관계；동시，연구료Π형파리판장치섬락과정중국부전호연신과정，발현상하표면국부전호호장균수설루전류봉치선성증가，호장증량지비여표면염밀유관，유차획득료상하표면호장지비여표면염밀적관계식。결과표명：해쌍전호모형가이교위준학지계산교류절연자적오섬전압。
Considering the differences in the characteristics of arcs on top and bottom wet polluted surfaces, an AC mathematical model was proposed to predict the flashover voltage of insulators. In order to obtain the parameters of the model, arcs on top and bottom surfaces of triangular glass plate were measured, and the staticU-I characteristics and recovery criteria were also acquired. In addition, an ultra-high speed camera was used to observe the AC partial arc characteristics on top and bottom surfaces the partial arcs. It is found that the U-I characteristics and recovery criteria of top and bottom arcs are different, and the radius and length of the arc column increase exponentially with the leakage current peak. It can be concluded that the ratio between arc length increments on top and bottom surfaces is related to equivalent salt deposit density (ESDD). The flashover voltages obtained by mathematic model commendably coincide with those obtained experimentally.