Magnetic field aggregation component and non-contact leakage current measurement device and method

Abstract

The invention discloses a magnetic field aggregation component and a non-contact leakage current measurement device and method. The magnetic field aggregation component comprises at least two concentrically arranged magnetic field concentrators, wherein longitudinal air gaps are arranged in the magnetic field concentrators, a transverse air gap is arranged between two adjacent magnetic field concentrators, and a magnetic sensor is placed in the transverse air gap. The magnetic field aggregation component of the invention adopts four air gap structures, so that the widths of the longitudinal air gaps of the magnetic field concentrators are no longer limited by the size of the magnetic field sensor; the magnetic field strength of the edges of the longitudinal air gaps is remarkably improvedthrough the minimum widths of the longitudinal air gaps; and two superimposed edge magnetic fields are simultaneously measured by the magnetic sensor located in the transverse gap, the measured magnetic field strength is much larger than the magnetic field strength of a traditional single air gap structure, a signal-to-noise ratio is improved and then the leakage current with only a few milliampsto hundreds of milliamps can be measured, and the requirement for the precision of earth leakage current measurement of power equipment is met.

Description

technical field

[0001] The invention relates to the field of electric equipment leakage current measurement to the ground, in particular to a magnetic field gathering component, a non-contact leakage current measurement device and a measurement method. Background technique

[0002] Intelligent and automated operation and maintenance of power equipment has always been the development direction of power grid technology. At present, big data and Internet of Things technology has made great progress, which greatly expands the application scope and field of online monitoring technology for power equipment. Insulation performance is related to the safe and reliable operation of power equipment, and has always been the focus of on-line monitoring technology. In particular, the monitoring of multiple insulation performance-related index parameters such as insulation resistance and relative dielectric loss value requires the measurement of the ground leakage current of power equipmen...

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