CAJ | 학술논문

绝缘子覆冰闪络事故仍然严重威胁着电力系统的安全稳定运行，尽管国内外的电力科学研究者对此开展了大量广泛的研究工作，但是在覆冰闪络特性和机理方面依然未能达成统一认识。为对其进行深入探讨，在人工气候室内对圆柱形绝缘子物理模型进行了交流覆冰闪络试验，同时利用摄像仪记录了覆冰绝缘子的整个闪络过程，分析研究了局部电弧的起始位置和可能发展的形式。试验结果表明：无冰带的位置对闪络电压有较大的影响，覆冰水电导率越高闪络电压越低；较高电导率的融冰水膜和无冰带的存在，是使绝缘子沿面电位分布发生变化，从而可能导致电弧起弧和发展延伸形式有所不同的重要影响因素；在电弧的不同发展阶段，内部和外部电弧的速度和燃烧状态也有所差异。
절연자복빙섬락사고잉연엄중위협착전력계통적안전은정운행，진관국내외적전력과학연구자대차개전료대량엄범적연구공작，단시재복빙섬락특성화궤리방면의연미능체성통일인식。위대기진행심입탐토，재인공기후실내대원주형절연자물리모형진행료교류복빙섬락시험，동시이용섭상의기록료복빙절연자적정개섬락과정，분석연구료국부전호적기시위치화가능발전적형식。시험결과표명：무빙대적위치대섬락전압유교대적영향，복빙수전도솔월고섬락전압월저；교고전도솔적융빙수막화무빙대적존재，시사절연자연면전위분포발생변화，종이가능도치전호기호화발전연신형식유소불동적중요영향인소；재전호적불동발전계단，내부화외부전호적속도화연소상태야유소차이。
A series of AC flashover experiments based on a cylindrical insulator model are performed in the artificial climate chamber. The whole discharge process of ice-covered insulator is recorded by the camera technique at the same time, for the purpose of analyzing the formation and possible propagation of the arc. Experimental results indicate that flashover voltage is influenced by the position of ice free zone; as applied water conductivity rises, flashover voltage declines; the highly conductive water film and the presence of ice free zone are key factors to change the potential distribution along the cylindrical insulator, which can lead to the different initial position of partial arc and the different discharge path; during various stage of the arc development, the propagation velocities and states of outer and inner arcs are also different