探讨SF6气体变压器的应用

介绍了香港电灯公司使用SF6气体变压器的情况，比较了气体变压器与油变压器的优缺点，提出了使用气体变压器的必要性和可能性。     

SF6气体密度继电器的现场检验

文章概述了青海电网所用的三种SF6气体密度继电器的工作原理，对目前SF6气体密度继电器的检验方法进行了分析，并对青海电网SF4气体密度继电器的检验工作进行了总结。     

用于超高压GIS的SF6气体绝缘套管的绝缘特性

用于超高压ＧＩＳ的ＳＦ＿６气体绝缘套管的绝缘特性张炳江（沈阳变压器厂）１．前言目前，为了减少电站的占地面积，减少维护，保证运行安全，在现代变电站中，ＧＩＳ（气体绝缘配电设备）已得到广泛应用。随着经济和技术的发展，ＧＩＳ也将随着高压、超高压变电站一同发...     

SF6气体绝缘变压器综述

本文概述SF_6气体绝缘变压器的发展过程、应用情况、产品类型、结构特征、工序过程,最后就我国发展该产品提出了建议。     

陡波作用下SF6气体的绝缘特性

用尖一板电极研究了极不均匀场中ＳＦ６气体在陡波作用下的绝缘特性，并和球－板间隙进行了比较。     

基于GPRS的SF6气体监测系统的设计

采用嵌入式和GPRS技术,通过Internet和GPRS来监测电力设备中SF6绝缘气体的密度和湿度。介绍了GPRS在电力系统中的应用和相关技术,可以实现变电站的SF6电力设备中SF6气体的无线实时监测。     

SF6全封闭组合电器应用中的问题探讨

分析了SF6全封闭组合电器在工程实践中存在的问题,从怎样能使用户更加方便检修及维护的角度出发,对进一步提高SF6全封闭组合电器的安全性及经济性进行了探讨。     

GIS设备气体分解物及其影响因素研究

文章利用专门设计的110 kV气体绝缘封闭组合电器(gas insulated switchgear,GIS)故障仿真装置,研究了GIS设备在局部放电作用下,气体分解物的产生规律,以及局部放电强度、放电形式、SF6湿度及吸附剂等对气体分解物含量的影响,初步探讨了气体分解物在GIS设备诊断中的应用价值和应注意的问题。     

浅谈运行中六氟化硫全封闭组合电器的气体监督检测

六氟化硫(SF6)全封闭组合电器(GIS)在我国电力系统中的应用越来越广泛,建立运行中的气体分析的有效检测手段,对此类电气设备进行监督管理显得尤其重要.为此,结合深圳供电局220 kV奋进变电站110 kVGIS运行中存在的问题和处理经验,提出了SF6全封闭组合电器气体监督检测方面的建议,可为SF6全封闭组合电器的安全运行和监督提供参考.     

A highly accurate algorithm for SF6 leakage detection

Sulfur hexafluoride (SF₆) is widely used in high‐voltage applications such as gas‐insulated switchgear (GIS) because of its excellent arc‐quenching properties. The main drawback of SF₆ is that it is a strong greenhouse gas. Detecting small SF₆ leakages in GIS is very important to protect the environment and to prevent the failure of aged GIS. To detect SF₆ leakage, the gas pressure is measured and compensated by gas temperature. Usually, the temperature of the container surface is measured instead of the actual gas temperature. However, the temperature of the container surface is affected by ohmic heating of the internal components and by ambient temperature changes. These factors lead to a difference in temperature between the container surface and the gas inside the container, causing significant fluctuations in the compensated gas pressure. To remove such fluctuations, we have developed a computational fluid dynamics (CFD) transient model that simulates the correlation between the mean gas temperature inside the container and the container's surface temperature. The CFD simulation factors in the load current and ambient temperature to estimate the true temperature of the gas inside the container as accurately as possible. The mean gas temperature inside the container is obtained using CFD simulation and by measuring the surface temperature. The fluctuations in the compensated gas pressure were reduced from 2.4 to 0.48% by using the proposed algorithm based on pressure compensation with the mean gas temperature. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Study on field demonstration of high‐sensitivity SF6 leakage detection method for gas insulated switchgear

SF6 gas is widely used in power equipment such as gas insulated switchgear or gas circuit breaker. However, its global warming potential is 23,500 times higher than that of CO₂. In consideration of environmental protection, detection of SF6 gas leakage with high sensitivity is necessary. The authors proposed an algorithm to accurately estimate the average gas temperature from the tank surface temperature for establishing a high‐sensitive SF6 slow leak detection technology. Since the gas temperature depends on the temperature of the conductor, the algorithm was characterized by estimating the gas temperature from the tank surface temperature and the load current. The relationship among the tank surface temperature, the gas temperature, and the current was preliminarily investigated by the use of the thermal fluid analysis and stored in the database. By use of this method, the fluctuation of the converted pressure in the basic examination test was suppressed to 20% as compared with that without considering the current. In addition, database was also created from the machine learning of field test result in substitution. In the field test, it was confirmed that the detection time of 0.5%/year slow leak could be detected in about 8 months by considering the load current.     

全封闭组合电器(GIS)中SF6气体水分控制

结合江门变电站220 kV全封闭组合电器（GIS）中SF6气体水分含量超标的实例,列举GIS设备中SF6气体所含水分的主要来源,并对运行中GIS设备水分含量的测试结果进行分析,提出水分含量超标时现场的处理方法和措施.     

全封闭组合电器(GIS)中SF_6气体水分控制

结合江门变电站220 kV全封闭组合电器(GIS)中SF6气体水分含量超标的实例,列举GIS设备中SF6气体所含水分的主要来源,并对运行中GIS设备水分含量的测试结果进行分析,提出水分含量超标时现场的处理方法和措施。     

SF6分解产物体积分数检测在SF6电气设备故障诊断中的应用

根据多年积累的SF6分解产物检测数据和对多起SF6电气设备故障的分析结论,笔者阐述了通过SF6分解产物体积分数检测判断SF6电气设备是否存在故障的理论依据和实际可行性,分析了SF6电气设备故障诊断的实际案例和故障诊断过程,为SF6电气设备的监督检测和故障诊断提供参考.     

220kV气体绝缘开关设备(GIS)耐压击穿故障分析

气体绝缘开关设备(GIS)相对于常规敞开式开关设备具有运行可靠性高、环境适应能力强、耐地震能力强、防污闪能力强以及占地面积和占有空间小等众多优点,近年来大量应用于电力系统。但随着电网基础建设的快速发展,GIS用量急增,厂家生产能力接近饱和,产品质量难以保证,导致基建过程中出现了大量问题,尤其是内部绝缘击穿问题,严重影响电网运行的安全。分析一起220kV变电站基建过程中GIS交流耐压试验击穿故障,通过对设备解体检查发现,该次击穿故障是由于元器件处理工艺不完善、有遗留污水所致,表明对合资企业产品均应加强监制。