High-sensitivity array type passive lightning current sensor

Abstract

The invention discloses a high-sensitivity array type passive lightning current sensor, which comprises a U-shaped pipe. The upper end of the U-shaped pipe is detachably connected with a sealing cover, the sealing cover and the U-shaped pipe form a symmetrical annular pipe, and the annular pipe is of a fillet square structure; a plurality of abutting blocks are arranged on the side face, adjacent to the sealing cover, of the outer side wall of the U-shaped pipe. A plurality of magnetoelectric structures are uniformly distributed in the annular pipe; magnetic aggregators are arranged at the positions between the magnetoelectric structures, and the magnetic aggregators are the same in structure and symmetrical to each other; the magnetoelectric structure comprises two mutually overlapped magnetostrictive sheets, and a piezoelectric sheet is arranged between the magnetostrictive sheets. The problem that in the prior art, an outdoor lightning current measuring device is insufficient in sensitivity can be solved, and measurement can be completed without an external power source; an opening-closing type detachable structure is used for solving the problem that an existing device cannot be detached after being installed; the performance of the sensor is improved by utilizing an array structure and combining a combined magnetic aggregator; the structure is simple, reliability is high and accuracy is good.

Description

technical field [0001] The invention relates to a current measuring device, in particular to a high-sensitivity array type passive lightning current sensor. Background technique [0002] For electrical facilities that are fixed outdoors, lightning current is the main factor affecting the normal operation of the line, so the measurement of lightning current is particularly critical to reduce its impact. The lightning current belongs to the pulse current of microsecond level, so it has high requirements for the measurement accuracy of the sensor. [0003] The Rogowski coil is a current sensor based on the principle of electromagnetic induction, and it is the most widely used transient current sensor at present. Its structure is mainly a coil and an integral circuit. [0004] Measuring lightning current with a Rogowski coil has high accuracy, but the cost of the entire detection system is relatively expensive, the amplitude of the induction signal is low, and the response spe...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a high-sensitivity array passive lightning current sensor capable of solving the problem of insufficient sensitivity of the device for measuring outdoor lightning current in the prior art

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