This paper studies the method for measuring the loop resistance of GIS conductor pole based on the super capacitor producing impulse current up to several thousand amperes. This method overcomes the limitations of con...This paper studies the method for measuring the loop resistance of GIS conductor pole based on the super capacitor producing impulse current up to several thousand amperes. This method overcomes the limitations of conventional diagnostic method. Typical GIS conductor poles are chosen. Based on FEA and lab tests, the effect of different forms of current and contact condition, relationship between the temperature of contact and the loop resistance is researched. In full- scale testing under realistic operating conditions on the new 220 kV GIS using prototype instrumentation a very good sensitivity in an early stage was obtained.展开更多
隔离开关是电力系统中关键的一次设备。表征设备负载能力的温升,特别是GIS封闭式隔离开关温升的计算在工程上具有重要参考价值。针对GIS隔离开关的热计算,基于传热学基本原理,建立了220 k V三相共箱式SF_6隔离开关等效热路模型,给出了GI...隔离开关是电力系统中关键的一次设备。表征设备负载能力的温升,特别是GIS封闭式隔离开关温升的计算在工程上具有重要参考价值。针对GIS隔离开关的热计算,基于传热学基本原理,建立了220 k V三相共箱式SF_6隔离开关等效热路模型,给出了GIS外壳及导体表面的对流换热及辐射换热的计算公式,提出了针对其在运行工况下,考虑环境温度、接触电阻、负荷电流等因素的稳态热场计算方法,计算结果与FEM计算结果的对比分析表明,所提出的模型能有效、快速计算GIS隔离开关正常运行条件下的热点温升,为电力设备的动态增容提供重要参考。展开更多
文摘This paper studies the method for measuring the loop resistance of GIS conductor pole based on the super capacitor producing impulse current up to several thousand amperes. This method overcomes the limitations of conventional diagnostic method. Typical GIS conductor poles are chosen. Based on FEA and lab tests, the effect of different forms of current and contact condition, relationship between the temperature of contact and the loop resistance is researched. In full- scale testing under realistic operating conditions on the new 220 kV GIS using prototype instrumentation a very good sensitivity in an early stage was obtained.
文摘隔离开关是电力系统中关键的一次设备。表征设备负载能力的温升,特别是GIS封闭式隔离开关温升的计算在工程上具有重要参考价值。针对GIS隔离开关的热计算,基于传热学基本原理,建立了220 k V三相共箱式SF_6隔离开关等效热路模型,给出了GIS外壳及导体表面的对流换热及辐射换热的计算公式,提出了针对其在运行工况下,考虑环境温度、接触电阻、负荷电流等因素的稳态热场计算方法,计算结果与FEM计算结果的对比分析表明,所提出的模型能有效、快速计算GIS隔离开关正常运行条件下的热点温升,为电力设备的动态增容提供重要参考。