CAJ | 학술논문

输电线路绝缘子冰闪过程中泄漏电流的变化发展与放电过程以及冰的融化状态紧密相关，泄漏电流的特征量能够反映冰层的状态变化以及放电的发展。为了解超高压500kV线路绝缘子融冰闪络特性，在环境气候试验室开展了污秽、覆冰条件下的试验研究，同步测量了融冰闪络试验中闪络和耐受两种状态下的泄漏电流，并进行了特性分析。分析结果表明：冰闪过程中泄漏电流的变化发展与放电过程紧密相关，电弧越强烈泄漏电流越大且波形畸变越小；在恒压下闪络和耐受的波形变化率有明显差异，且两种情况的平均波形变化率存在明显分界线e，该值可以为超高压绝缘子冰闪预警提供参考。
수전선로절연자빙섬과정중설루전류적변화발전여방전과정이급빙적융화상태긴밀상관，설루전류적특정량능구반영빙층적상태변화이급방전적발전。위료해초고압500kV선로절연자융빙섬락특성，재배경기후시험실개전료오예、복빙조건하적시험연구，동보측량료융빙섬락시험중섬락화내수량충상태하적설루전류，병진행료특성분석。분석결과표명：빙섬과정중설루전류적변화발전여방전과정긴밀상관，전호월강렬설루전류월대차파형기변월소；재항압하섬락화내수적파형변화솔유명현차이，차량충정황적평균파형변화솔존재명현분계선e，해치가이위초고압절연자빙섬예경제공삼고。
The characteristics of leakage current can reflect the state change and ice discharge development. We ex- perimentally study on UHV 500 kV transmission line insulator ice flashover characteristics in contamination and ic- ing conditions in environmental climatic test chamber, measured the leakage current in ice flashover test under the conditions of withstand and flashover at the same time, and analyzed the characteristics. The analysis results show that： the variation and development of the leakage current in the process of insulator ice flashover are related to the discharge process. When discharge is stronger, the leakage current is larger and the distortion of waveform is smal- ler; There exists a remarkable difference in the waveform change rates between flashover and withstand condition at the constant vo｜tage. And there exists obvious boundary in the two cases. This value can provides a reference for the prediction of high voltage insulator ice flashover.