Research on suppression of external magnetic field interference of tunnel magnetoresistive sensor based on versoria variable step improved adaptive filtering method

Yu, Jicheng; Yue, Changxi; Jiang, Chengzhou; Zhang, Dongdong; Huang, Xiaoning; Cui, Yang; Li, Lei

doi:10.1016/j.egyr.2021.08.043

Cited by 4 publications

(1 citation statement)

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“…In an effort to enhance the measurement accuracy of these sensors, researchers have explored various designs and techniques. One such improvement is the proposal of an enhanced adaptive filtering method based on a versatile variable step size, aimed at suppressing external magnetic field interference and improving the measurement accuracy of the current sensor [ 11 ]. However, due to its reliance on array sensor arrangements, this interference suppression method is primarily suitable for high-current measurements at the ampere level, as smaller target currents may be easily overwhelmed by the useful signal.…”

Section: Introductionmentioning

confidence: 99%

Research on Residual-Current Measurement System of Substation Considering Magnetic Shielding Effect

Tian,

Xu,

Yang

et al. 2024

Sensors

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Residual current is an important monitoring quantity of a power system, and a current sensor plays an important role in detecting current. The substation environment is complex. In addition to the power frequency signal, residual current also has AC and DC components. But it is also affected by the stray magnetic field of the substation. Therefore, the accuracy of the current sensor demands higher requirements. The tunnel magnetoresistive sensor has the advantages of a stable operation, high efficiency, and energy saving, but it is easily affected by the external stray magnetic field during measurements, resulting in a large error. Therefore, this paper proposes a residual-current sensing monitoring system considering the magnetic shielding effect. The root mean square error of the magnetic shielding structure is only 0.572 mA, which can effectively reduce the influence of the external magnetic field and improve the detection accuracy. At the same time, the DC measurement error is less than 1%, the AC measurement error is less than 5%, and the hybrid AC/DC error is less than 8%. It has good response ability and can accurately detect residual current.

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Section: Introductionmentioning

confidence: 99%