空气绝缘输电线路中不同气压对UHF信号与放电量之间关系的影响

发布时间：2018-07-05 05:52

本文选题：超高频法 + 脉冲电流法　；参考：《高电压技术》2014年05期

【摘要】：气体绝缘输电线路(GIL)已成为替代架空输电线路与高压电缆的首选方案,为研究气体绝缘开关设备(GIS)中UHF信号与气压之间的关系,针对0.1~0.4 MPa不同气压下金属突出物缺陷模型的局部放电情况,提取了UHF信号的信号能量与重积分等典型特征量,与脉冲电流法信号进行了相关性分析。研究表明:各个气压下的UHF信号能量及其重积分与放电量平方的线性关系具有较高的相关系数;UHF信号能量的线性斜率与气体压力相对应;放电量的分布区域在高气压下狭小,但与低气压时相比,UHF信号的能量随之变化的灵敏度较高。研究结果丰富了气压变化条件下的UHF检测数据库,为标定空气型GIL UHF信号放电量的研究奠定了基础。
[Abstract]:Gas insulated transmission line (Gil) has become the first choice to replace overhead transmission line and high voltage cable. In order to study the relationship between UHF signal and air pressure in gas insulated switchgear (GIS), gas insulated transmission line (Gil) has become the first choice for replacing overhead transmission line and high voltage cable. According to the partial discharge of metal outburst defect model at different pressure of 0.1 ~ 0.4 MPA, the signal energy and re-integral of UHF signal are extracted, and the correlation between UHF signal and pulse current signal is analyzed. The results show that the linear relationship between the UHF signal energy and its multiple integral and the square of discharge quantity has a high correlation coefficient. The linear slope of UHF signal energy corresponds to the gas pressure, and the distribution region of the discharge amount is narrow at high pressure. However, compared with low pressure, the energy of UHF signal has higher sensitivity. The results enrich the database of UHF detection under the condition of air pressure change, and lay a foundation for the study of calibrating the discharge quantity of air type GIL UHF signal.
【作者单位】：重庆大学输配电装备及系统安全与新技术国家重点实验室;国网重庆市电力公司检修分公司;四川电力设计咨询有限责任公司;
【基金】：国家重点基础研究发展计划(973计划)(2009CB724506) 教育部“新世纪优秀人才支持计划”(NCET-12-0590)~~
【分类号】：TM863

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