Stray current active absorption device

A stray current and absorbing device technology, which is applied in the direction of circuit devices, battery circuit devices, output power conversion devices, etc., can solve the problems that the suppression effect cannot be achieved, and the ground potential of the stray current flowing into the point tube is negative, etc., to achieve Effects of suppressing hydrogen embrittlement, suppressing corrosion, and preventing hydrogen embrittlement

Pending Publication Date: 2022-08-09
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the positive bias of the tube ground potential at the point where the stray current flows can be alleviated to a certain extent, it cannot effectively suppress the negative tube ground potential at the point where the stray current flows in.

Method used

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  • Stray current active absorption device
  • Stray current active absorption device
  • Stray current active absorption device

Examples

Experimental program
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Effect test

Embodiment Construction

[0041] like figure 1 As shown, an embodiment of the present invention provides an active absorbing device for stray current. The stray current active absorption device includes a four-quadrant converter unit, a battery, an energy regulation unit, and a control processing unit; the specific description is as follows:

[0042] (1) The four-quadrant converter unit is the main body of the stray current active absorption device, mainly including a bidirectional flyback circuit and a full bridge circuit; the input of the bidirectional flyback circuit is connected to the positive and negative poles of the battery, and the bidirectional flyback circuit The output adopts the voltage regulation control method to provide a stable DC voltage as the input of the full bridge circuit. The output positive pole A of the full-bridge circuit is connected to the pipeline, the output negative pole B is connected to the auxiliary anode, and the output voltage is U AB Indicates that the output cur...

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Abstract

The invention discloses a stray current active absorption device, and relates to the field of pipeline cathode protection, and the stray current active absorption device comprises a four-quadrant converter unit, a storage battery, an energy regulation and control unit and a control processing unit, and has reverse compensation and active absorption functions. And the microprocessor is used for analyzing the pipe-to-ground potential at the current position and controlling the working in different modes according to the requirements on reverse compensation/active absorption. The stray current is prevented from flowing out/flowing in from the damaged point of the pipeline, so that pipeline corrosion caused by positive pipe-to-ground potential deviation or pipeline hydrogen embrittlement caused by negative pipe-to-ground potential deviation is prevented, and the technical problem of pipeline direct-current stray current interference caused by rail transit is solved.

Description

technical field [0001] The invention relates to the field of pipeline cathodic protection, in particular to a stray current active absorption device. Background technique [0002] With the construction of rail transit in my country in recent years, there are more and more cases of parallel and intersection of oil and gas pipelines and rail transit, and the probability of receiving DC interference has increased significantly. However, the existing cathodic protection system is difficult to form effective drainage or absorption protection for dynamic stray current, and in severe cases, the amount of corrosion caused by DC interference is as high as 50 to 200 times the amount of corrosion caused by the same amount of AC, even resulting in a wall thickness of 7 to 8 mm. Corrosion and perforation of the steel pipe in several months, leading to the case of severe corrosion of the pipeline is increasing. The existing cathodic protection system is limited by its own structure and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/32H02J7/00H02J7/35
CPCH02M3/33584H02M1/32H02J7/007182H02J7/0068H02J7/0048H02J7/35H02J2300/26H02J2207/20Y02E10/56
Inventor 周乐明刘同旭王舒克罗安袁征雷志杰朱振华
Owner HUNAN UNIV
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