Mutual inductor error test system in GIS based on frequency conversion anti-interference technology

The utility model discloses a mutual inductor error test system in a GIS based on a frequency conversion anti-interference technology. The system comprises an AD sampling unit, an AD sampling preprocessing unit, an I/O port expansion and logic control unit, a digital signal processing and storage unit, an LCD display module, a keyboard input module, a heat dissipation module and a USB interface module. The utility model has the advantages of anti-field interference ability, can test GIS and bushing type mutual inductor, non-standard transformation ratio mutual inductor and one piece of equipment simultaneously compatible with current transformer and voltage transformer test. 本实用新型公开的是一种基于变频抗干扰技术在GIS内的互感器误差测试系统，所述系统包括AD采样单元、AD采样预处理单元、I/O口扩展和逻辑控制单元、数字信号处理及存储单元、LCD显示模块、键盘输入模块、散热模块和USB接口模块。本实用新型具有抗现场干扰能力、同时可以测试GIS及套管式互感器、非标准变比互感器以及一台设备可同时兼容电流互感器和电压互感器测试的优点。