110kV复合型放电间隙避雷器的电气性能
发布时间：2018-11-28 12:21
【摘要】：为降低110kV架空输电线路雷击跳闸率,基于多短间隙过零熄弧后不重燃的机理,提出一种由多短间隙结构和单个大间隙相串联而成的复合型放电间隙避雷器。该避雷器允许多短间隙被击穿建立电弧通道,在间隙中产生的高气压作用下,电弧被推出短间隙。在工频续流自然过零熄弧后,由于分布到单个短间隙上的最大电压不足以重新燃弧,以确保电弧不发生重燃。该文首先通过工频续流试验考核多短间隙过零熄弧后不重燃的可靠性;进而通过雷电冲击试验、淋雨试验和污秽试验,检验该避雷器的电气性能。试验结果表明复合型放电间隙避雷器具有良好的工频续流遮断能力,且电弧不会发生重燃;具有良好的雷电冲击特性和淋雨特性,适用于重污秽地区。复合型放电间隙避雷器满足110kV输电线路安全运行的要求,并能够在继电保护动作前可靠熄灭电弧使其不发生重燃,可用于110kV输电线路防雷。
[Abstract]:In order to reduce the lightning tripping rate of 110kV overhead transmission lines, a composite discharge gap arrester composed of multi-short gap structure and a single large gap phase in series is proposed based on the mechanism of non-reburning after zero extinguishing of multi-short gap. The arrester allows the breakdown of the short gap to establish the arc channel, and the arc is pushed out of the short gap under the action of the high pressure generated in the gap. After the natural zero-extinguishing arc of the power frequency continuous current, the maximum voltage distributed on a single short gap is not enough to re-ignite the arc to ensure that the arc does not reburn. In this paper, the reliability of non-reburning of multi-short gap after zero-extinguishing arc is tested by power frequency continuous current test, and the electrical performance of the arrester is tested by lightning shock test, rain test and pollution test. The experimental results show that the composite discharge gap arrester has a good power frequency continuous current interrupting ability and no reburning of the arc, and has good lightning shock and rain characteristics, so it is suitable for heavy polluted areas. The composite discharge gap arrester can meet the requirements of the safe operation of the 110kV transmission line and can reliably extinguish the arc before the relay protection operation so that it does not reburn. It can be used for the lightning protection of the 110kV transmission line.
【作者单位】： 武汉大学电气工程学院;国网福建省电力有限公司;中国科学院电工研究所;
【基金】：国家自然科学基金青年科学基金项目(51307125) 国家电网公司重点科技项目(SGTYHT/14-JS-188)~~
【分类号】：TM862
本文编号：2362805
[Abstract]:In order to reduce the lightning tripping rate of 110kV overhead transmission lines, a composite discharge gap arrester composed of multi-short gap structure and a single large gap phase in series is proposed based on the mechanism of non-reburning after zero extinguishing of multi-short gap. The arrester allows the breakdown of the short gap to establish the arc channel, and the arc is pushed out of the short gap under the action of the high pressure generated in the gap. After the natural zero-extinguishing arc of the power frequency continuous current, the maximum voltage distributed on a single short gap is not enough to re-ignite the arc to ensure that the arc does not reburn. In this paper, the reliability of non-reburning of multi-short gap after zero-extinguishing arc is tested by power frequency continuous current test, and the electrical performance of the arrester is tested by lightning shock test, rain test and pollution test. The experimental results show that the composite discharge gap arrester has a good power frequency continuous current interrupting ability and no reburning of the arc, and has good lightning shock and rain characteristics, so it is suitable for heavy polluted areas. The composite discharge gap arrester can meet the requirements of the safe operation of the 110kV transmission line and can reliably extinguish the arc before the relay protection operation so that it does not reburn. It can be used for the lightning protection of the 110kV transmission line.
【作者单位】： 武汉大学电气工程学院;国网福建省电力有限公司;中国科学院电工研究所;
【基金】：国家自然科学基金青年科学基金项目(51307125) 国家电网公司重点科技项目(SGTYHT/14-JS-188)~~
【分类号】：TM862
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