数字化输出的电子式电流互感器在线校验系统研制  

Development of On-site Calibration System of Electronic Current Transformer with Digital Output

作　　者：童悦[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《高电压技术》2010年第7期1742-1746,共5页High Voltage Engineering

摘　　要：由于具有绝缘性能好、动态范围广、频带宽、无磁饱和等优点,电子式电流互感器已经开始取代传统式电流互感器而应用于电力系统和其它工业领域。然而供能电源和信号处理电路的引用给电子式电流互感器的可靠性带来了新的问题,因此电子式电流互感器的校验监测变得尤为重要。为此,提出了一种电子式电流互感器数字输出在线校验系统,它采用加多重矩形卷积窗的插值高精度算法,可以针对现场运行的数字化输出的电子式电流互感器进行在线校验,能更精确地反映一次侧电流电压值,大大提高了电力系统的可靠性。试验结果表明,该系统完全可以满足0.2s级电子式电流互感器的现场校验要求。Traditional current transformer is being replaced by electronic current transformer in power system and other industrial field. Nevertheless,the use of power supply circuit and signal processing circuit brings new challenge to the stability of electronic current transformer,so the calibration and monitoring of electronic current transformer is more important. We presented a calibration system based on a virtual instrument,which can calibrate the electronic current transformer with digital output on site. The experimental results show that this system has high precision to meet the requirements of calibrating 0.2 s class electronic current transformer.

关 键 词：电子式电流互感器 在线校验系统 数字化输出 多重矩形卷积窗 虚拟仪器 LABVIEW 

分 类 号：TM452[电气工程—电器]