摘要
气体绝缘金属封闭组合电器(GIS)在电力系统中应用广泛,其运行安全可靠对电力系统至关重要。现场雷电冲击耐压试验受制于设备体积和回路电感,难以在GIS变电站,尤其是特高压GIS变电站应用。本文分析了目前GIS设备冲击耐压试验现状,并从波形参数、电压极性和加压间隔时间等方面阐述了GIS设备冲击电压绝缘缺陷检出影响因素。基于研发的特高压GIS变电站现场冲击耐压试验用的可移动式气体绝缘标准雷电冲击试验成套设备,成功在1000 kV南京站和苏州站开展了现场标准雷电冲击耐压试验。
Gas-insulated metal-enclosed switchgear （GIS） has been widely used in power system, and the safe and reliable operation of the GIS are very important. Restrained by the device structure and circuit inductance, the on-site lightning impulse （LI） withstand test is difficult to be carried out in the GIS substation, especially in the ultra-high voltage （UHV） GIS substation. In this paper, the present situation of GIS impulse test is analyzed. And then the influence factors of insulation defect detecting using impulse test such as waveform parameters, polarity and interval time between two impulse tests are elaborated. Finally, based on the moveable gas-insulated impulse voltage test complete equipment, the on-site standard lightning impulse test is applied successfully in 1000 kV Nanjing substation and 1000 kV Suzhou substation.
出处
《电力工程技术》
2017年第1期30-33,53,共5页
Electric Power Engineering Technology
基金
国家电网公司科技项目(SHJJGC1500189)
