风力对1100 kV GIS出线套管局放缺陷时温度特征的影响分析  

Influence of Wind on Temperature Characteristics of 1100 kV GIS Outgoing Bushing with Partial Discharge Defect

作　　者：张丕沛 师伟 李杰 王江伟 商攀峰 ZHANG Pipei;SHI Wei;LI Jie;WANG Jiangwei;SHANG Panfeng(State Grid Shandong Electric Power Research Institute,Jinan 250003,China;Shandong Electric Power Research Institute,Jinan 250003,China)

机构地区：[1]国网山东省电力公司电力科学研究院,济南250003 [2]山东电力研究院,济南250003

出　　处：《高压电器》2023年第12期209-215,共7页High Voltage Apparatus

基　　金：山东电力研究院科技项目(特高压变电站电压致热型设备温度分布研究及红外诊断方法优化)。

摘　　要：对于500 kV及以下的GIS出线套管,利用红外测温的手段诊断内部局放缺陷已有比较丰富的经验和案例,而用于特高压变电站的1100 kV GIS出线套管体型高大,内部屏蔽结构相对复杂,缺乏相关缺陷诊断经验,且其表面温度会不可避免的受到外界风力影响。对于某些特殊环境和地区,若等待风速满足红外测温要求则可能延误诊断时机,造成缺陷的进一步发展,因此有必要研究风力对1100 kV GIS套管局放缺陷时温度特征的影响。文中建立1100 kV GIS套管的三维温度场仿真模型,对不同局放位置时的表面温度特征进行仿真研究,并采用流体外掠圆管的模型进一步分析了风速、风向对套管表面热点的影响规律,结果表明:局放缺陷时套管表面温差约为2~3 K,当缺陷位置的正向风、背向风、侧向风的风速分别达到约5、6、9 m/s时,套管表面温差与无风时相比下降2 K,此时套管表面已不存在比较明显的热点,若开展红外测温则极易导致内部缺陷的漏判。For GIS outgoing bushing at 500 kV and below,it has rich experience and cases to diagnose internal par-tial discharge defects by means of infrared temperature measurement.However,1100 kV GIS outgoing bushing for UHV substation is large in size,relatively complex in its internal shielding structure as well as lacking in relevant de-fect diagnosis experience,and its surface temperature will inevitably be affected by external wind.For some special environments and areas,if we wait the wind speed to meet the requirements of infrared temperature measurement,the diagnosis time may be delayed,resulting in the further development of defects.Therefore,it is necessary to study the influence of wind on temperature characteristics of 1100 kV GIS outgoing bushing with partial discharge defect.In this paper,the three-dimensional temperature field simulation model of 1100 kV GIS bushing is set up,and the sur-face temperature characteristics of different partial discharge positions are simulated and studied.The influence of wind speed and wind direction on the surface hot spots is further analyzed by using the model of fluid sweeping round pipe.The results show that the surface temperature difference of bushing with partial discharge defect is about 2~3 K,and when the wind speed of the positive wind,the back wind and the side wind at the defect location reach about 5 m/s,6 m/s and 9 m/s respectively,the temperature difference on the surface of the bushing decreases by 2 K compared with that without wind.At this time,there is no obvious hot spot on the surface of the bushing,and if the infrared tem-perature measurement is carried out,it is likely to lead to the missed diagnosis of internal defects.

关 键 词：1000 kV GIS 套管 温度特征 局放 有限元 

分 类 号：TM595[电气工程—电器] TM855