【摘要】 为了分析各种不同缺陷在不同条件下的放电特点,根据气体绝缘组合电器(gasinsulated switchgear,GIS)设备绝缘缺陷放电形式和特点,采用超高频法对模拟装置内所设计的4种GIS局部放电物理模型进行了大量的局部放电(partial discharge,PD)实验,获得了真实可靠的超高频(ultra-high-frequency,UHF)局部放电(partial discharge,PD)波形样本;深入研究了4种典型GIS缺陷的物理模型分别在不同尺寸规格下、置于不同位置处、在不同电压等级下的UHFPD波形特征,实验的结果表明,不管是那种缺陷类型引起的PD激发的超高频电磁波,在不太高的实验电压下,放电脉冲波形发生突变之前,放电脉冲的形状变化不大且比较稳定,放电脉冲的持续时间通常是ns级。更多还原

【Abstract】 In order to analyze the discharge features of different insulation defects in various experimental conditions, according to characteristics of partial discharge (PD) from the insulation defects in gas insulated switchgear (GIS)) and using ultra high frequency (UHF) method, a lot of PD experiments are carried out based on the designed four typical physical models of insulation defects of GIS in the simulation device, and the real samples of UHF PD waveforms are recorded. The features of UHF PD waveforms in the different situations are discussed and analyzed in detail, which include different sizes or positions of the physical models or under the different voltages and so on. The results show that in low voltage, regardless of types of UHF electromagnetic wave excited by PD sources, the shapes of PD waveform changed little before the changes of waveform. The remaining time is about several nanoseconds.更多还原