基于改进数字滤波算法的电子式互感器稳态校验方法

传统电子式互感器校验方法一般采用电磁式互感器作为标准源,该校验方法不仅存在电磁互感器的铁磁谐振及铁磁饱和缺陷、增容困难、二次接线繁琐以及二次开路高压危险等客观困难,而且面临模拟信号和数字信号直接对比的问题,易导致电子式互感器稳态校验的效果差和准确性低,为此,提出了一种采用改进数字滤波算法的电子式互感器稳态校验方法。首先,简述了电子式互感器的校验流程,分析了传统电子式互感器稳态校验的不足;其次,详细阐述了改进的数字滤波算法,并提出了改进的数字滤波算法电子式互感器稳态校验方法;最后,通过算例对所提稳态校验方法进行了验证,以期为电子式互感器的大规模推广应用提供借鉴。

A Steady-state Calibration Method of Electronic Transformer Basedon Improved Digital Filter Algorithm

The traditional calibration method of electronic transformer usually uses the electromagnetic transformer as the standard source.This method is easy to cause low efficiency and low accuracy of the calibration of electronic transformer,due to the problems of the electromagnetic transformer,which including ferromagnetic resonance,magnetic saturation,difficulties of increasing capacity,complicated two wire connection and the hazard of two open circuit high voltage.And this method faces the problem of direct contrast between analog signals and digital signals.Therefore,a steady-state calibration method of electronic transformer based on the improved digital filtering algorithm is proposed.First of all,the calibration process of electronic transformer is introduced,and this paper analyzes the shortcomings of traditional calibration method of the electronic transformer.Secondly,the paper describes the improved digital filtering algorithm in detail,and proposes a steady-state calibration method of electronic transformer based on the improved digital filter algorithm.Finally,a case verifies the feasibility of the proposed steady-state calibration method,and provides the reference for the large-scale popularization of electronic transformers.