A portable grounding grid corrosion state monitoring system and monitoring method

A technology for monitoring system and corrosion state, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., it can solve the problems of strong interference signal, inability to obtain electrochemical measurement response signal, etc., to achieve strong anti-interference ability, reduce Low-complexity, affordable effects

Inactive Publication Date: 2018-11-27
国网河南省电力公司超高压公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the strong interference signal in the environment where the substation grounding grid is located, the real electrochemical measurement response signal cannot be obtained without filtering means

Method used

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  • A portable grounding grid corrosion state monitoring system and monitoring method
  • A portable grounding grid corrosion state monitoring system and monitoring method
  • A portable grounding grid corrosion state monitoring system and monitoring method

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Embodiment Construction

[0033] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0034] The grounding grid corrosion state monitoring device of the present invention includes a 0-100uA step current signal module for applying a polarization excitation signal between the auxiliary electrode (2) and the research electrode (1) in the polarization reaction three-electrode structure and the dual integral voltage data acquisition module for collecting the excitation response between the reference electrode (3) and the research electrode (1), as well as the power management module for supplying power to each module of the device and the control of the 0-100uA step current signal and the double integral data The sampling signal is analyzed by the microprocessor module to obtain the soil corrosion rate.

[0035] Such as figure 1 As shown, the research electrode (1) is composed of an electrode test head (1-1...

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Abstract

The invention discloses a portable monitoring system for the corrosion state of a grounding grid and a monitoring method. The monitoring system comprises a plurality of identical tri-electrode sensing head structures, a step-index variable microampere constant-current excitation source circuit, an integration type millivolt detection circuit and a data display interface based on a Windows operation system. The monitoring system and monitoring method are mainly used for real-time automatic monitoring of the corrosion rate of the grounding grid of an electricity grid in the field and can effectively prevent accidents of an electrical power system caused by corrosion of the grounding grid; step-index constant-current charging curve technology enables the corrosion rate of a carbon steel grounding grid to be rapidly measured; and the monitoring system has a simple structure, low cost and high stability, is applicable to field long-term work and substantially improves the detection speed and accuracy of the corrosion rate due to usage of the unique double-integration type millivolt detection circuit.

Description

technical field [0001] The invention relates to a monitoring system for the corrosion state of grounding grids in power plants and substations, in particular to a device and method for measuring the corrosion rate of carbon steel grounding grids based on constant current charging curve technology. Background technique [0002] The grounding conductor material of the grounding grid in domestic power plants and substations is mostly carbon steel. Carbon steel is prone to corrosion in soil, and the corrosion rate can reach 8mm / a in highly corrosive soil. The corrosion of the grounding grid seriously threatens the power grid. safe operation. In my country, power system accidents caused by grounding grid corrosion occur frequently, and each accident has brought huge economic losses. The corrosion detection of the grounding grid can detect the severely corroded area of ​​the grounding grid in time, and take effective measures in time before it causes serious accidents, which will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/02
Inventor 王来军梁向阳方强华张渤王媛彬杜京义
Owner 国网河南省电力公司超高压公司
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