尹仕红,范小飞,宋宏天,赵雪松,裘星,罗奕.直流偏磁影响下电流互感器误差分析与校验技术研究[J].电测与仪表,2026,63(1):193-200. YIN Shihong,FAN Xiaofei,SONG Hongtian,ZHAO Xuesong,QIU Xing,LUO Yi.Research on error analysis and calibration technology of current transformers under the influence of DC bias magnetization[J].Electrical Measurement & Instrumentation,2026,63(1):193-200.
直流偏磁影响下电流互感器误差分析与校验技术研究
Research on error analysis and calibration technology of current transformers under the influence of DC bias magnetization
Under the influence of DC bias, the iron core of the current transformer is prone to saturation, causing the ratio error to shift towards negative direction and the phase error to shift towards positive direction, resulting in measurement inaccuracy. This paper discusses the principle of the impact of DC bias on the error of current transformers, introduces a new type of anti-DC bias current transformer, which has anti-DC bias function compared to traditional current transformers. The paper briefly describes the verification requirements, methods, and schemes of
anti-DC bias current transformers, and conducts a large amount of experimental verification work. The paper also develops an AC / DC standard current transformer based on self-excited oscillation flux gate technology and magnetic integrator technology with an accuracy level of 0.02, which can measure both DC and AC, and has been applied in the error verification of anti-DC bias current transformers, achieving good results.
