淋雨条件下瓦型导线的电晕特性

Study on Corona Characteristics of Tile-type Conductor in Rainfall Environment

为研究淋雨条件下瓦型导线的电晕特性,在人工气候室中对单根瓦型导线JRLX/T-310/40和钢芯铝绞线LGJ-300/40进行干燥和不同程度淋雨条件下的电晕实验,利用紫外成像仪和声级计观察电晕放电情况。结果表明,在同等电场强度的条件下,瓦型导线在淋雨条件下的电晕损失和可听噪声值明显高于干燥条件,且随着雨量的增大,电晕损失和可听噪声值增加,起晕电压明显下降;同等条件下,瓦型导线的电晕损失和可听噪声值都明显低于钢芯铝绞线,表明瓦型导线能较好改善导线的电晕特性。

To study corona characteristics of T-type conductors under rain conditions,this paper built a corona cage in artificial climate chamber,using ultraviolet imager and sound level meter to observe corona discharge of JRLX/T-310/40(T-type conductor)and LGJ-300/40(steel core aluminum wire)under dry environment and environments of different rainfall densities.Experimental results show that,under the same electric field intensity,corona loss and audible noise value of T-type wire in rain environment are significantly higher than those in dry environment.With increase of rainfall density,corona loss and audible noise value increase,and corona inception voltage decreases obviously.Under the same conditions,the corona loss and audible noise value of T-type conductors are obviously lower than those of steel core aluminum stranded wires,indicating that T-type conductors can improve corona characteristics remarkably.