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Method and system for measuring polarization potential of buried metal pipeline

A technology of metal pipes and polarized potentials, applied in the direction of measuring electrical variables, measuring current/voltage, measuring devices, etc., can solve the problems that the influence of ground current IR drop cannot be eliminated, and achieve simple implementation, improved accuracy, and IR drop completely eliminates the effect of

Active Publication Date: 2019-05-21
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0006] In order to solve the technical problem that the prior art pilot test segment electric method can not eliminate the influence of the IR drop of the current in the ground when measuring the polarization potential of the buried metal pipeline, the present invention provides a method for measuring the polarization potential of the buried metal pipeline. The methods described include:

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  • Method and system for measuring polarization potential of buried metal pipeline
  • Method and system for measuring polarization potential of buried metal pipeline
  • Method and system for measuring polarization potential of buried metal pipeline

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Embodiment Construction

[0032] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0033] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention provides a method and a system for measuring the polarization potential of a buried metal pipeline. According to the method and the system, an even number of test pieces are symmetrically distributed around a participating electrode; the polarization potential of the buried metal pipeline is measured by adopting a test piece group and a test piece power-off method; then the IR drop error value of the grounding electrode is measured under the condition of no current and no passing current, and finally the polarization potential measurement value of the buried metal pipeline influenced by the current of the high-voltage direct-current grounding electrode is measured according to the measured polarization potential value and the IR drop error value. According to the method and the system, the influence of IR drop caused by current in the ground when the polarization potential of the buried metal pipeline is tested is effectively reduced, so that the measurement result can better reflect the actual influence degree.

Description

technical field [0001] The invention relates to the field of polarization potential measurement, and more particularly, relates to a method and system for measuring the polarization potential of buried metal pipelines. Background technique [0002] Polarization potential is an important index for evaluating the cathodic protection effect of buried metal pipelines, which is mainly obtained by measuring the potential difference between buried metal pipelines and the reference electrode. [0003] For the buried metal pipeline adjacent to the high-voltage DC grounding electrode, part of the current flowing into the ground from the grounding electrode will circulate in the soil near the pipeline, and some will flow into and out of the pipeline through the damaged point of the pipeline and circulate on the pipeline. Directly measure the potential difference between the metal part of the buried metal pipeline and the reference electrode, in addition to the required metal polarizati...

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Application Information

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IPC IPC(8): G01R19/00
Inventor 白锋曹方圆李雄刘国黄流建曾飞
Owner CHINA ELECTRIC POWER RES INST
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