工频试验变压器在高压开关设备试验中的运行工况  

Operating Conditions of Power Frequency Test Transformer Used in Dielectric Test for High-voltage Switchgears

作　　者：王春杰[1] 张弦[1] 王露[1] 苏春强[1] 邱凌伟 孔珍珍[1] 

机构地区：[1]西安高压电器研究院有限责任公司,西安710077

出　　处：《高压电器》2016年第2期115-120,共6页High Voltage Apparatus

摘　　要：随着高压开关设备的型式试验考核项目逐渐增多,工频试验变压器的试验工况也变得复杂,对其绝缘性能的要求更加苛刻。为了使试验变压器运行在安全工况下,并采取可靠的防护措施,需要对其运行工况做出清晰的判断。文中介绍了在工频耐受电压试验、联合加压试验和隔离开关开合容性小电流试验中试验变压器承受的稳态电压和暂态过电压,以及实际试验中采取的保护措施;提出了对试验变压器入口端VFTO进行建模仿真和实测研究以及利用磁环原理抑制VFTO侵入的建议。文中对工频试验变压器的设计制造和选型、试验标准的修订以及工频试验变压器寿命研究具有一定的参考意义。With the increase of type test items for high-voltage switchgears, the operating conditions of power frequency test transformer become more complicated, and the requirements for its insulation performance become more stringent. In order to keep the power frequency test transformer in safe operating conditions and take reliable protective measures, clear judgments on the operating conditions should be made. In this paper, the steady state voltage and transient overvoltage stressed on power frequency test transformer and the protective measures used in power frequency withstand voltage test,combined voltage test and disconnector switching lower capacitive current test are introduced, and suggestions for researches on measurement and simulation of VFTO at the entrance of power frequency test transformer and on using ferromagnetic rings to suppressing VFTO are given. This paper provides with some reference values for power frequency test transformer design, selection, test standard revision and the lifetime study.

关 键 词：高压开关设备 工频试验变压器 暂态过电压 防护措施 

分 类 号：TM564[电气工程—电器]