电力设备多级TMR传感器的设计和优化AC/DC泄漏电流检测电流检测
Xiaoxu Hu1, Xuetao Duan1, Wei Zhang1
1State Key Laboratory of Power Transmission Equipment and System Security, Chongqing University, Chongqing 400044, China.
本研究介绍了一种新的多级道磁阻 (TMR) 传感器,用于电力设备中的交流/直流泄漏电流检测. 改进的设计显著提高了测量精度和稳定性,防止外部磁干扰.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 传感器技术 传感器技术
背景情况:
- 道磁阻传感器 (TMR) 由于其弱磁场测量能力,为电力设备中的交流/直流泄漏电流传感提供了优势.
- 现有的TMR电流传感器在复杂环境中存在精度和稳定性的局限性,原因是易受外部磁场干扰的影响.
研究的目的:
- 提出和验证一种新的多阶段TMR弱交流/直流电流传感器结构,具有增强的测量灵敏度和抗磁干扰能力.
- 优化传感器结构,以在具有挑战性的工程应用中提高性能.
主要方法:
- 使用有限元模拟来分析多阶段环尺寸与传感器的磁性测量特性和干扰免疫性之间的关系.
- 使用改进的非主导排名遗传算法 (ACGWO-BP-NSGA-II) 来确定传感器结构的最佳多极磁环大小.
主要成果:
- 优化的多阶段TMR传感器显示测量范围为60mA,非线性误差低于1%.
- 传感器实现了0-80 kHz的广泛测量带宽,最小可检测的交流和直流电流分别为85 μA和50 μA.
- 实验结果证实了传感器的强大性能和对外部电磁干扰的强烈免疫力.
结论:
- 拟议的多阶段TMR传感器结构有效地提高了AC/DC泄漏电流检测的测量精度和稳定性.
- 优化的设计解决了传统TMR传感器的局限性,使其适合复杂的电力设备监控.
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