从高压电力线上监测50 Hz时间磁场:传感器设计和实验验证
Kenneth Deprez1, Tom Van de Steene1, Leen Verloock1
1Department of Information Technology, Ghent University/imec WAVES, 9052 Ghent, Belgium.
Sensors (Basel, Switzerland)
|August 29, 2024
概括
一个新的,负担得起的磁场传感器准确地监测电力线路的50 Hz场. 在现实条件下验证,它显示了长期环境磁场监测的高可靠性.
科学领域:
- 电气工程 电气工程
- 环境监测 环境监测
- 电磁学 电磁学 电磁学 电磁学
背景情况:
- 来自高压电线的磁场在环境和健康研究中越来越令人担忧.
- 需要准确且具有成本效益的监测解决方案来评估暴露水平.
- 现有的传感器可能是昂贵的,或者缺乏必要的灵敏度,用于低级域检测.
研究的目的:
- 设计,校准和验证一种低成本的三轴传感器,用于监测50 Hz磁场.
- 为了评估传感器的性能,使用现成的组件进行广泛应用.
- 为了验证传感器在现实世界高压电线环境中的准确性和可靠性.
主要方法:
- 使用商用部件和线圈开发三轴传感器.
- 车载和实验室校准程序,包括与基准EHP-50传感器进行比较.
- 在高压电力线和配电子站下进行现场验证.
- 在至少3个月的时间内,使用四个活跃传感器进行长期实地测试.
主要成果:
- 传感器测量50 Hz磁场从0.08μT到364μT在两个范围.
- 现场测量显示与文献值一致,与基准相比平均偏差为6.2%和1.4%.
- 实地测试产生了很高的正常运行时间 (81-96%),收集了超过600万个样本.
- 一个子站成功记录了高达113.3μT的测量,验证了两个范围.
结论:
- 开发的低成本传感器是监测高压电线50 Hz磁场的可行工具.
- 传感器在各种现场条件下表现出良好的准确性和可靠性.
- 建议进行进一步的长期测试,以完全确认在各种环境条件下运行正常时间.
相关概念视频
01:18Magnetic Field Due to Two Straight Wires
2.4K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
2.4K
01:16Induction
4.0K
An emf is induced when the magnetic field in a coil is changed by pushing a bar magnet into or out of the coil. emfs of opposite signs are produced by motion in opposite directions, and the directions of emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important. The faster the motion, the greater the emf. Additionally, there is no emf when the magnet is stationary relative to the coil.
A...
A...
4.0K
01:27Induced Electric Fields: Applications
1.6K
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
1.6K
01:17Magnetic Damping
437
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
437
01:19Magnetic Field Lines
4.1K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
Magnetic field lines follow several hard-and-fast rules:
4.1K
01:22Motional Emf
3.2K
Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the...
3.2K