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Power distribution network low-voltage large-current magnetic field simulation display device

A magnetic field simulation and display device technology, applied in the direction of using digital measurement technology for measurement, can solve problems such as affecting normal power supply, electromagnetic equipment burnout, etc., and achieve the effect of automation and intelligence, easy portability and high precision

Active Publication Date: 2014-11-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the magnetization intensity of ferromagnetic materials reaches the limit and saturates part of the magnetic circuit, a local high current will be generated to burn out the electromagnetic equipment, thus affecting the normal power supply

Method used

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  • Power distribution network low-voltage large-current magnetic field simulation display device
  • Power distribution network low-voltage large-current magnetic field simulation display device
  • Power distribution network low-voltage large-current magnetic field simulation display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] according to the above Figure 2 to Figure 10 Configure and install the distribution network low-voltage high-current magnetic field simulation display device used in this embodiment, wherein the excitation transformer T 2 The secondary side of 2 is a turn of high-current copper wire, so when the autotransformer T 1 1 When the current increases, it will make the excitation transformer T 2 2 The magnetic circuit of the coil reaches saturation. From the relevant knowledge of magnetic circuit saturation, the excitation transformer T 2 A large distorted current can be generated in the coil of 2, and the distorted current can reach more than 300 amperes. Exciting transformer T 2 2. The secondary high-current copper wire has a length of 1.7147m and a cross-sectional area of ​​120mm 2 , The parameter is selected as 75mV / 300A. According to the transformer ratio formula Get, get the excitation transformer T 2 2 primary turns At this time, the power of the device is: P=...

Embodiment 2

[0047] In addition to the autotransformer T in the low-voltage and high-current generating circuit of the distribution network during operation 1 The secondary side voltage is adjusted to 127V, and the distribution network low-voltage high-current magnetic field simulation display device used in this embodiment and other operating procedures are the same as embodiment 1.

[0048] Result: The digital display shows that the result is 173.8A, and the error is 0.35%<0.5%, which is within the allowable range of error.

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Abstract

A power distribution network low-voltage large-current magnetic field simulation display device relates to detection on magnetic saturation large current of a power system and comprises a hardware part and a software part, wherein the hardware part consists of a power distribution network low-voltage large-current generation circuit, a low-voltage large-current detector, a 5-V voltage-stabilizing power supply, an A / D converter, a control single chip computer and a display; and the software part consists of operating procedures of a master control circuit, including a master control procedure, a data processing subprogram and a display subprogram. The device not only can generate large current under low voltage of a power distribution network, but also can simulate and display the large current in the display of the device, thus being an intelligent large-current magnetic field simulation display device which is convenient to carry, simple to operate, low in price and high in measuring precision.

Description

technical field [0001] The technical scheme of the invention relates to the detection of the magnetic circuit saturation and large current of the power system, specifically a low-voltage and high-current magnetic field simulation display device for the distribution network. Background technique [0002] At present, more than 90% of the electric energy generated by power generation equipment is distributed and used by electromagnetic equipment. Electromagnetic equipment is widely used in safe power distribution in the fields of industry, agriculture, transportation, national defense, science and education, culture and health, finance, commerce, tourism services and people's lives, and its working performance and reliability are directly related to the normal operation of national production . However, with the development of the national economy, the requirements for the quality of power supply are getting higher and higher, and the rapid development of the power system, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25
Inventor 张惠娟李玲玲韩培洁王杰
Owner HEBEI UNIV OF TECH
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