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Lightning flow sensor of Rogowski coil based on printed circuit board

A printed circuit board and lightning current technology, which is applied in the structural field of lightning current sensors, can solve problems such as poor ability to adapt to harsh outdoor environments, inability to measure lightning current, and inconvenience for popularization and application, so as to improve work reliability and stability. The effect of improving the anti-interference ability, facilitating the promotion and application

Inactive Publication Date: 2013-02-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current sensor can only measure the power frequency current with a periodic waveform that does not require a high frequency band (that is, it can only be used as a current transformer for a distribution network), and cannot measure a large amplitude and short rise time that requires a wide frequency range. The non-periodic waveform of the lightning current cannot be used as a lightning current sensor
[0005]2. Only filter circuit is used to suppress interference, and the anti-interference performance is poor
Therefore, the current sensor is only suitable for measuring the distribution network current based on the power frequency current, and it cannot measure the lightning current with a large amplitude and short rise time in the case of strong electromagnetic interference around the overhead transmission line.
[0006] 3. The sensor uses an active electronic transformer, and the power supply environment is complex, which leads to a complex structure of the current sensor, reduced working reliability, and the ability to adapt to harsh outdoor environments Difference
The measurement accuracy and service life of the sensor are affected, and the installation is complicated, inconvenient to use, and not easy to promote and apply

Method used

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  • Lightning flow sensor of Rogowski coil based on printed circuit board
  • Lightning flow sensor of Rogowski coil based on printed circuit board
  • Lightning flow sensor of Rogowski coil based on printed circuit board

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as Figure 1~5 As shown, a lightning current sensor based on a Rogowski coil of a printed circuit board is mainly composed of a substrate 3, an integrating circuit 2, a shielding layer 4, and the like.

[0030]The material of the substrate 3 is FR-4 sheet material with a thickness of 3 mm, and the shape of the substrate 3 is a circular ring with a boss on the edge. The outer diameter of the circular ring of the substrate 3 is 232 mm, and the inner diameter is 148 mm, which is used to make a PCB type Rogowski coil. The edge boss of the substrate 3 has a length of 20 mm and a width of 15 mm, and is used for installing the integrating circuit 2 . On the inner and outer circumferences of the circular ring of the substrate 3, 288 through holes (i.e. via holes 3-3) are evenly and symmetrically arranged respectively, and the diameter of the through holes (i.e. via holes 3-3) It matches the width of the printed wire of the PCB-type Rogowski coil, and is used as a wire ho...

Embodiment 2

[0034] A lightning current sensor based on a Rogowski coil of a printed circuit board, same as embodiment 1, wherein: the outer diameter of the circular ring of the substrate 3 is 200 mm, the inner diameter is 120 mm, and the inner and outer diameters of the circular ring of the substrate 3 are 200 via holes 3 - 3 are uniformly and symmetrically arranged on the circumference. Sampling resistor R a is a metal film resistor of 0.3kΩ, the integral resistor R is a metal film resistor of 30kΩ, and the product value of the capacitance value of the integral capacitor C and the resistance value of the integral resistor R is 1×10 -3 .

Embodiment 3

[0036] A lightning current sensor based on a Rogowski coil of a printed circuit board is the same as in Embodiment 1, wherein: the outer diameter of the circular ring of the substrate 3 is 280 mm, the inner diameter is 170 mm, and the inner and outer diameters of the circular ring of the substrate 3 are 330 via holes 3 - 3 are uniformly and symmetrically arranged on the circumference. Sampling resistor R a is a non-inductive resistor of 2kΩ, the integral resistor R is a non-inductive resistor of 80kΩ, and the product value of the capacitance value of the integral capacitor C and the resistance value of the integral resistor R is 4×10 -3 .

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Abstract

The invention provides a lightning flow sensor of a Rogowski coil based on a printed circuit board, and relates to a lightning flow sensor structure of a Rogowski coil based on a PCB (printed circuit board). The lightning flow sensor mainly consists of a base plate, an integral circuit, a shielding layer and the like. The lightning flow sensor has the advantages that the structure is simple, the manufacture is convenient, the cost is low, the measuring frequency band is wide, the response speed is high, the anti-interference capability is high, the measuring precision is high, the reliable work and stable operation can be realized under outdoor adverse environment, the lightning flow sensor is suitable for popularization and application, and the like. The lightning flow sensor can be widely applied to measure the lightning flow of an overhead transmission line, and can provide original data for the selection of lightning devices, the research of lightning flow electromagnetic radiation and the like.

Description

Technical field [0001] The invention is a lightning current measurement technology field, which involves the structure of the light current sensor based on the Rogowski coil based on the printing circuit board (PCB). Background technique [0002] The amplitude of the lightning current is large and the rise time is short. The resulting power system over voltage threatens the safe and stable operation of the power grid.Effectively measure the various parameters of lightning current provides the most primitive data for the selection of lightning protection equipment and the study of lightning electromagnetic radiation, which is of great significance for the basic research of lightning current.Common lightning current measurement methods include magnetic steel rods, cathode oscilloscope, tape method, Rogowski (Rogowski) coil.Wide application.In recent years, the PCB Rogowski coil current transformers have been developed. It is a current sensor that can accurately measure the current ...

Claims

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Application Information

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IPC IPC(8): G01R19/00
Inventor 李成祥吴俊锋姚陈果米彦王有元司马文霞杨庆袁涛
Owner CHONGQING UNIV
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