雾霾天气对复合绝缘子运行性能的影响

发布时间：2018-05-11 14:08

本文选题：雾霾 + 复合绝缘子　；参考：《电网技术》2014年07期

【摘要】：为探究雾霾天气对电力设备外绝缘的危害,以现场运行的复合绝缘子进行试验研究。雾霾对复合绝缘子的影响主要体现在2个方面:一是导致复合绝缘子表面积污量的增加;二是其产生的湿沉降会增加绝缘子的泄漏电流、降低闪络电压。利用河北省石家庄地区的雾霾天气进行了360 h的自然积污试验,分别在不同的雾霾脏污程度下试验3次,研究污秽度和泄漏电流与雾霾的脏污程度及作用时间之间的关系。试验结果表明:雾霾天气的发生会在短时间内增加绝缘子表面的污秽度,在数十小时内可以使绝缘子表面的等值盐密增加0.01?0.04 mg/cm2、灰密值增加0.05?0.2 mg/cm2;空气质量指数不同,试品表面污秽度增加情况也不同;雾霾日数的增加是影响复合绝缘子表面污秽度的重要因素;雾霾产生的湿沉降会增加复合绝缘子的泄漏电流。短期内雾霾天气不会导致复合绝缘子发生污闪故障,但随着雾霾作用时间的延长和环境污染的加剧,污闪的可能性是存在的。
[Abstract]:In order to explore the harm of fog and haze to the external insulation of electric power equipment, the composite insulators operated in the field are tested. The influence of haze on composite insulators is mainly reflected in 2 aspects: one is the increase of surface area pollution of composite insulators, and the two is that the wet deposition of the insulators will increase the leakage current of insulators and reduce the flashover voltage. The natural pollution test of 360 h was carried out in the haze weather in Shijiazhuang area of Hebei province. The relationship between pollution degree and leakage current and the effect time of fog and haze was studied 3 times under different degree of fog and haze. The results showed that the occurrence of haze weather would increase the surface of insulators in a short time. Contamination degree can increase the equivalent salt density of insulator surface by 0.01? 0.04 mg/cm2 in the last few hours and increase the ash density by 0.05? 0.2 mg/cm2, and the increase of surface pollution degree is different from the air mass index, and the increase of haze days is an important factor affecting the surface contamination of composite insulators; the wet deposition of haze will increase The leakage current of composite insulators. In the short term haze weather will not cause pollution flashover of composite insulators. However, the possibility of pollution flashover is possible with the prolongation of fog and haze time and the aggravation of environmental pollution.

【作者单位】：华北电力大学电气与电子工程学院;国网河北省电力科学研究院;青海省电力公司海西供电公司;
【基金】：国家自然科学基金项目(51177046) 中央高校基本科研业务费专项资金项目(13MS71)~~
【分类号】：TM216

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