使用TMR传感器对三相矩形总线条进行非接触电流测量
Huafeng Su1, Haojun Li1, Weihao Liang1
1Dongguan Power Supply Bureau of Guangdong Power Grid Co., Ltd., Dongguan 523120, China.
Sensors (Basel, Switzerland)
|January 23, 2024
概括
本研究介绍了一种非接触式电流测量方法,使用道磁电阻 (TMR) 传感器用于三相总线条. 该系统以不到2.5%的RMS误差和1°的相位误差实现了高精度,使得可靠的功率监控成为可能.
科学领域:
- 电气工程 电气工程
- 传感器技术 传感器技术
- 电力系统 电力系统
背景情况:
- 精确的电流测量对于电力系统的监控和控制至关重要.
- 现有的非接触式方法经常面临动态范围,带宽或安装复杂性的限制.
- 三相矩形总线条需要专门的非接触式传感解决方案.
研究的目的:
- 开发和验证三相矩形总线杆的新型非接触电流测量方法.
- 利用道磁电阻 (TMR) 传感器的优势,提高测量性能.
- 为了实现当前传感器系统的准确和可靠的在线校准.
主要方法:
- 一个使用三个TMR传感器的非接触电流传感器阵列被设计并放置在总线杆附近.
- 一个由电阻控制的电阻负荷被用来产生可识别的校准电流.
- 开发了一种强大的方法,从TMR传感器信号中提取电压元件进行校准.
- 实现了一个完整的测量系统,集成TMR传感器,校准器和数据采集.
主要成果:
- 与商业探测器相比,开发的系统显示了相对RMS误差小于2.5%和相位误差小于1°.
- 基于TMR的电流传感器的非线性误差被发现比0.8%更好.
- 拟议的在线校准方法在确定精确的电流与磁场关系方面被证明是有效的.
结论:
- 建议使用TMR传感器的非接触电流测量方法对于三相矩形总线杆来说是准确和可靠的.
- 该系统的性能,包括低误差率和有效的在线校准,使其适用于实际的发电应用.
- 由于其有利的特性,TMR传感器为非接触式电流传感提供了可行的解决方案.
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