一种直流互感器暂态校验装置及校验算法设计

暂态校验设备缺乏、校验技术水平较低和缺少试验规范是导致当前直流互感器暂态校验试验无法开展的重要原因,为了解决上述问题,研制了一种基于高速采样与FT3实时快速解析技术的直流互感器暂态校验装置.提出测量阶跃波形参考电平的众数法和平均值法,并对其进行分析比较,基于众数法的阶跃波形测量的准确度更高,故利用该暂态校验装置对某厂家的直流互感器进行暂态特性试验.试验结果表明,该直流互感器暂态校验装置可实现模拟量与数字量输出的直流互感器的全暂态参数校验.

Design of a transient calibration device and algorithm for DC transformer

The lack of transient calibration equipment, under developed calibration technology and lack of test specifications are important reasons for the termination of the transient calibration test for current DC transformer. In order to solve the above-mentioned problem, a transient calibration device for DC transformer based on high-speed sampling and FT3 real-time fast analysis technology was developed. A mode method and an average method for measuring the reference level of step wave form were proposed and compared. The step waveform measurement based on mode method has higher accuracy. Therefore, the as-proposed calibration device was used to perform transient characteristic test on a DC transformer from a manufacturer. The test results show that the transient calibration device for the DC transformer can realize the full transient parameter calibration of DC transformer with both analog and digital output.