小电流下空心线圈电流互感器的输出波形质量测试  

Test of Output Waveform Quality of Hollow Coil Current Transformer Under Small Current

作　　者：侯姗[1] 赵志山[2] HOU Shan;ZHAO Zhishan(Jinzhong Vocational and Technical College,Jinzhong 030600,Shanxi,China;Langfang Power Supply Company,Langfang 065000,Hebei,China)

机构地区：[1]晋中职业技术学院,山西晋中030600 [2]廊坊供电公司,河北廊坊065000

出　　处：《电气传动》2021年第23期65-69,共5页Electric Drive

基　　金：国家自然科学基金(55208486)。

摘　　要：为了给生产厂家产品设计和改善提供依据,对小电流下互感器输出波形质量进行测试。介绍了空心线圈的结构和工作原理,对互感器输出波形进行采集。将一台220 kVGIS用互感器作为实验仪器,在小电流下对互感器输出波形精度、暂态饱和性和稳态性进行测试。发现小电流下,空心线圈传感头输出受干扰的影响较大,而积分放大单元和相位补偿单元输出信号受干扰程度不大;在小电流下,一定程度上会导致电流互感器出现局部暂态饱和,但不会长期保持;小电流下容易受到外界环境的干扰,导致不同时刻输出电压相差较大,互感器输出波形不稳定。In order to provide the basis for the design and improvement of the manufacturer's products,the output waveform quality of the transformer under small current was tested.The structure and working principle of the hollow coil were introduced,and the output waveform of the transformer was collected.A 220 kV GIS transformer was used as the experimental instrument to test the output waveform accuracy,transient saturation and stability of the transformer under small current.It is found that the output of the hollow coil sensor head is greatly affected by the interference under small current,while the output signals of the integral amplification unit and the phase compensation unit are not interfered to a large extent;under small current,the partial transient saturation of the current transformer will occur to some extent,but it will not be maintained for a long time;under small current,it is easy to be interfered by the external environment,resulting in a large difference of the output voltage at different times,the output waveform of transformer is unstable.

关 键 词：小电流 空心线圈 电流互感器 输出波形 质量测试 

分 类 号：TM452[电气工程—电器]