Online monitoring system for grounding corrosion and use thereof

Abstract

The present application discloses an online monitoring system for grounding corrosion, comprising a device support column and a cement foundation pier used for being fixed to soil, wherein the device support column is fixedly connected or detachably connected to the cement foundation pier, and an energy supplementing power supply is arranged at the top of the device support column. The online monitoring system for grounding corrosion further comprises a sensor unit, a monitoring device box, and a grounding current test box which are connected in sequence; the monitoring device box and the grounding current test box are arranged on the device support column, and the sensor unit is arranged in the soil; the sensor unit is connected to the monitoring device box by means of a test cable; the grounding current test box is connected in series into a lead-down cable between the grounding end of an electrical device and a grounding grid; and the monitoring device box is connected to an external centralized control platform by means of a transmission line or a wireless network. Comprehensive real-time online monitoring of the grounding grid and a grounding material in industries such as electric power is achieved, and accurate data support and decision basis can be provided for electric power grounding design and management.

Description

An online monitoring system for ground corrosion and its application Technical Field

[0001] The present application relates to an online monitoring system for grounding corrosion and its application, belonging to the technical field of grounding grid and grounding material corrosion situation perception. Background Art

[0002] Currently, grounding grid inspections for power systems typically rely on conventional ground resistance testing and excavation testing. A grounding grid is considered healthy when its ground resistance is below the design value. Abnormal ground resistance requires local excavation or grounding grid fault analysis. These analyses fail to identify the corrosion status and causes of grounding materials, nor can they inform decision-making regarding grounding grid maintenance, modification, or design. Furthermore, these inspections are performed after a problem has been discovered, resulting in long inspection cycles and a lack of real-time early warning. Substation grounding system failures are a major contributing factor to power system accidents. The lack of ground corrosion status awareness and early warning capabilities prevents station managers from providing sufficiently accurate and timely grounding status information, effectively supporting decisions such as corrosion hazard assessments and safety assessments. Furthermore, these capabilities lack effective data support for grounding maintenance, modification, and design. The corrosion rate and corrosion factors of grounding materials are crucial data for grounding design and protection plans, but cannot be determined solely through existing grounding inspection methods. Therefore, the lack of ground corrosion status awareness and early warning represents a significant risk to power safety management and a key component of digital management.

[0003] At present, the lack of engineering and research on grounding monitoring of power transmission and transformation has led to many problems in the research, design, operation and maintenance of grounding grids, grounding materials and protection technologies of power companies: (1) The basic research on grounding material corrosion lacks long-term accumulated monitoring data. The operating environment of power grounding materials is complex, involving not only complex soil electrochemical corrosion, but also strong electromagnetic field environment is a key factor leading to grounding material corrosion. Traditional grounding material corrosion only simply considers the soil corrosion of materials, while ignoring the important factor of accelerated corrosion in strong electromagnetic field environment. This has led to the current standards and specifications being unable to meet the actual engineering needs. (2) Insufficient data accumulation for grounding grid corrosion engineering. National basic data accumulation and research on material soil corrosion are sampled every year, but the current situation is that it cannot meet the needs of materials in the power field. Materials, environments and actual application conditions are very different. The power industry itself lacks the accumulation, collection and research of data in this corrosion field, and cannot provide effective support in the design and management of grounding material corrosion. (3) The corrosion evaluation of power grounding cannot meet the actual production needs. The power industry's construction of the grounding material corrosion evaluation system mostly refers to other industries such as petroleum and petrochemicals, focusing on the soil corrosion of materials. At present, the characteristics of the power industry itself have not been taken into account. Research has shown that the ground current of power grounding is the main cause of local rapid corrosion of the grounding grid, but there is currently no standardized evaluation method to incorporate this. (4) The design, maintenance, and decision-making mechanism of the grounding grid are still in their early stages. The corrosion and protection design of the grounding grid is relatively rough, and the design life of the materials differs greatly from the actual service life. This not only results in large investment in the later stage of the actual project and waste of materials, but also fails to meet my country's demand for safe power operation.

[0004] Currently, among the state perception methods for grounding corrosion in power transmission and transformation, the detection of the grounding resistance of the grounding grid is generally unable to determine the corrosion status and breakpoints of the grounding grid. Even if a breakpoint occurs in a grid of the grounding grid, the grounding resistance may still be qualified, and this method cannot obtain the cross-sectional loss status of the grounding electrode. Its grounding status diagnosis uses electrical network theory to judge the corrosion and breakpoint status of the grounding grid through the changes in the resistance of each grid conductor. This detection method is complex and has low accuracy. It is unable to obtain the corrosion rate of the material or understand the cause of the corrosion of the material, and cannot provide a basis for material selection, design, and decision-making. On-site excavation detection is even more time-consuming and costly, with extremely low detection efficiency. Large-scale excavation will affect normal power supply. Therefore, in the application of online corrosion monitoring of grounding corrosion in power transmission and transformation, there is no comprehensive and efficient real-time monitoring system and method, which is a bottleneck technology that urgently needs to be solved.

[0005] Summary of the Invention

[0006] According to one aspect of the present application, a grounding corrosion online monitoring system is provided, which realizes comprehensive real-time online monitoring of grounding grids and grounding materials in industries such as power, and can provide accurate data support and decision-making basis for power grounding design and management.

[0007] Power transmission and transformation grounding devices are buried in the soil, and their performance is directly linked to the soil. In addition to determining the grounding performance of the grounding device, soil can also corrode it, consuming the grounding conductor and reducing its performance, or even rendering it ineffective and creating safety issues. Soil is a complex system composed of three phases: gas, liquid, and solid. It also harbors varying numbers of soil microorganisms, whose metabolic products can also corrode the material. Large grounding devices sometimes also face corrosion issues caused by stray currents. The solid components of soil are relatively immobile and lack mobility. Therefore, even within the same soil type, physical and chemical properties can vary depending on location, ground vegetation, and surface topography. Therefore, measuring and assessing soil corrosivity is a complex issue.

[0008] Soil corrosivity is difficult to express with a simple explicit formula, nor is it easy to measure directly from soil. It is related to many factors and changes over time. This means that the soil corrosivity of a material cannot be determined solely by the physical and chemical properties of a single soil. From a macroscopic perspective, the corrosion of materials in soil is primarily related to the following factors:

[0009] (1) Electrochemical corrosion of the soil of the tower grounding material. The grounding electrode is buried in the soil and is in direct contact with the earth. Therefore, soil corrosion is the most important type of corrosion of the grounding electrode material. Soil is a collection of inorganic and organic colloidal mixed particles, composed of soil particles, water, and air. It is a complex multiphase structure. A large number of capillary micropores or pores are formed between the soil particles. The pores are filled with air and water, often forming a colloidal system, which is an ion conductor. The properties and structure of the soil are uneven and variable. The solid part of the soil is fixed to the metal surface of the grounding body buried in the soil, while the gas and liquid phases in the soil can move relatively limitedly. These physical and chemical properties of the soil, especially the electrochemical properties, directly affect the characteristics of the soil corrosion process. The complex and variable composition and properties of the soil make the corrosiveness of different soils vary greatly; (2) The grounding current of the grounding grid. The grounding electrode is the main component of the grounding device. It is mainly used for current discharge and voltage equalization to ensure the safe operation of the power grid and electrical equipment. Due to load changes, uneven three-phase peak currents, uneven phases, or poor line insulation due to factors such as climate and pollutants, the power frequency ground current formed in the line enters the earth through the grounding electrode and flows out through the grounding electrode. Electrochemical corrosion occurs at the outflow site due to the action of the current, accelerating the corrosion of the grounding electrode material. At the same time, various DC and AC stray currents in the external environment will also cause corrosion to the grounding grid material. Therefore, the grounding current and electric field changes of the grounding electrode material are also one of the important factors for ground grid corrosion; (3) Corrosion caused by the unevenness of the ground grid and its use environment. The solid components that make up the soil are relatively fixed, unlike the air and seawater, which are fluid. Even for the same type of soil, their physical and chemical properties are not the same. The unevenness of the soil may cause uneven ground grid corrosion. The large difference in the buried environment may also cause corrosion of the ground grid macrocell, accelerating the corrosion rate of the local ground grid.

[0010] This application adopts the following technical solutions:

[0011] An online ground corrosion monitoring system includes a device support column and a cement foundation pier for fixing on the soil, wherein the device support column is fixedly connected or detachably connected to the cement foundation pier, and a power supply is provided at the top of the device support column;

[0012] The ground corrosion online monitoring system also includes a sensor unit, a monitoring equipment box, and an underground current test box connected in sequence;

[0013] The monitoring equipment box and the ground current test box are arranged on the equipment support column, and the sensor unit is arranged in the soil;

[0014] The sensor unit is connected to the monitoring equipment box via a test cable;

[0015] The ground current test box is connected in series to the down conductor cable between the ground terminal of the electrical equipment and the grounding grid;

[0016] The monitoring equipment box is connected to the external centralized control platform via a transmission line or a wireless network.

[0017] Optionally, the sensor unit includes several sensors for in-situ monitoring of soil physical and chemical properties.

[0018] The combination of several sensors for in-situ monitoring of soil physical and chemical properties is a soil corrosivity parameter online monitoring sensor.

[0019] Optionally, the sensor unit is a corrosion test piece corrosion rate monitoring sensor.

[0020] Optionally, the ground corrosion online monitoring system is an in-situ material corrosion rate monitoring system based on ultra-micro resistance measurement.

[0021] Optionally, the sensor is made of the same material as the grounding grid.

[0022] Optionally, the soil physical and chemical properties include soil resistivity, soil redox potential, natural potential of grounding materials in the soil, soil pH value, soil moisture content, material corrosion rate, microbial parameters, stray current, and electromagnetic field.

[0023] Optionally, the soil physical and chemical properties include soil resistivity, soil redox potential, natural potential of grounding materials in the soil, soil pH value, material corrosion rate, and AC and DC stray currents.

[0024] Optionally, the soil physical and chemical properties include soil resistivity, soil redox potential, and soil pH value.

[0025] Soil resistivity is one of the most important physical and chemical indicators of soil corrosivity. It is generally believed that the lower the soil resistivity, the more corrosive the soil. When measuring the resistivity of undisturbed soil, the Vena quadrupole method or the soil electrode method can be used to measure the soil resistivity.

[0026] Redox potential (REDOX) is an important indicator of soil's physical and chemical properties. It can be understood as the soil's ability to donate or accept electrons. A high electron-accepting capacity indicates a high redox potential, while a high electron-donating capacity indicates a low redox potential. Factors such as soil aeration and microbial activity are related to soil corrosivity. The soil's redox potential can be measured using the inert electrode potentiometry method. A platinum or graphite electrode is placed in the soil to be tested, and the difference between its potential and that of a reference electrode is measured to obtain the soil's redox potential.

[0027] Once the cathode and anode reactions of a metal electrode in an electrolyte reach equilibrium, a stable equilibrium potential is established. The natural potential of a metal in soil reflects physical and chemical properties such as soil temperature, humidity, compactness, and aeration. It is a comprehensive factor that can be used to preliminarily assess the corrosion condition of the metal. The natural potential of a metal in soil can be measured by the potential difference between a test piece made of the same material as the grounding grid and a reference electrode. In a distributed system, the natural potential at each monitoring location can represent the uniformity parameters of the soil in that environment.

[0028] Soil acidity and alkalinity is one of the important parameters affecting soil corrosion rate. Metal sensors or glass electrodes are used to measure the sensor potential and convert it into soil pH value.

[0029] Water is the component that makes soil a corrosive medium. Therefore, soil moisture content is crucial to the corrosion of metal materials. Dielectric constant sensors can be used to measure changes in soil moisture online.

[0030] A metal test piece made of the same material as the grounding material is buried in the soil of the grounding grid environment, and the soil corrosion rate or erosion rate of the metal test piece is tested using electrochemical method, resistance method, inductance method and other methods.

[0031] Optionally, the ground current test box includes a sensor for monitoring the grounding electrode current of the grounding grid.

[0032] Optionally, the grounding grid grounding electrode current sensor includes a grounding grid grounding electrode DC sensor and a grounding grid grounding electrode AC sensor.

[0033] By disconnecting the grounding down conductor and connecting a high-power milliohm sampling device in series, the DC and AC voltage differences detected by the sampling device can be used to calculate the AC and DC currents flowing through the down conductor into the grounding grid and, in turn, into the earth. When AC and DC currents flow through the grounding material and into the earth, an electrochemical reaction occurs on the surface of the grounding material, causing the metal to lose electrons. The reaction when DC current flows is equivalent to electrolysis, accelerating corrosion of the grounding material. The monitored current intensity can be used to calculate the corrosion rate and cumulative corrosion loss of the grounding material.

[0034] Optionally, the monitoring equipment box transmits the data sensed and collected by the sensor unit and the ground current test box in real time to the centralized control platform for soil corrosivity assessment;

[0035] The assessment includes combining real-time monitored physical and chemical performance data with soil inherent indicators to score, comprehensively evaluating the corrosion level of the environmental soil through the score, and correcting the environmental soil corrosivity level with reference to the grounding grid ground current value;

[0036] The soil intrinsic indicators include soil texture and soil Cl ion content.

[0037] Soil texture and Cl ion content, as inherent soil indicators, can be obtained through a one-time test.

[0038] The grounding grid's grounding current value includes the grounding DC current intensity value and the grounding AC current intensity value. The grounding electrode DC current corrosion rate is calculated using Faraday's law using the grounding grid's grounding DC current intensity. The AC current corrosion rate is calculated using the empirical formula using the grounding grid's grounding AC current intensity. The calculation results are used to correct the environmental soil corrosion level.

[0039] The assessment uses a multi-index approach, and its results can be used as a basis for grounding grid material selection, operation, and maintenance. The long-term accumulation of corrosion test specimen erosion rates can be used to calculate grounding material corrosion losses, obtaining an accurate corrosion rate that can be used to warn of grounding grid corrosion accidents.

[0040] Optionally, the transmission line is selected from at least one of an optical fiber, a CAN bus cable, and a 485 cable.

[0041] Optionally, the wireless network includes a 4G transmission network.

[0042] Optionally, the energy supplement power source is selected from at least one of mains electricity, solar energy and wind energy.

[0043] The energy supplement power supply is used to provide power to the ground corrosion online monitoring system.

[0044] Optionally, the external centralized control platform includes at least one of a local industrial computer, a remote host computer software platform, and a cloud system.

[0045] Utilizing big data statistics and analytical modeling, decision-making data is generated and provided to production personnel and management personnel. Based on this system decision data, management personnel make decisions on the corrosion status of the grounding, corrosion prevention measures, design, and maintenance parameters, thereby forming an intelligent management strategy.

[0046] According to one aspect of the present application, a power grounding corrosion online monitoring system is provided, including the above-mentioned grounding corrosion online monitoring system.

[0047] Optionally, the down-lead cable is connected to the substation equipment on an insulating connection plate via insulating bolts.

[0048] According to another aspect of the present application, there is provided an application of the above-mentioned ground corrosion online monitoring system in the fields of electricity, construction, computers, industrial and mining enterprises, and communications.

[0049] A comprehensive power grounding corrosion monitoring system should encompass numerous corrosion parameters of the grounding device environment, including soil physical and chemical parameters, microbiological parameters, ground current parameters, and external current interference parameters of the grounding device, fully accounting for all factors influencing the corrosion of the grounding material. By collecting and accumulating complete corrosion data on the grounding material over its service life and utilizing big data statistical analysis, the most accurate corrosion status can be determined.

[0050] The beneficial effects of this application include:

[0051] Compared with the existing technology, the online grounding corrosion monitoring system provided by this application can achieve comprehensive monitoring of the soil corrosion behavior of grounding grids and grounding materials. It can comprehensively analyze the factors affecting the corrosion of grounding materials in industries such as the power industry, and complete online monitoring and early warning of comprehensive corrosion of grounding materials and analysis and prediction of grounding corrosion data. It solves the problems of lack of basic data for corrosion assessment and life prediction of grounding materials in industries such as the power industry, and insufficient decision-making basis. By accumulating soil environmental corrosiveness data and grounding material erosion rate data over a long period of time, it can achieve comprehensive assessment of grounding grid corrosion status and early warning of grounding material corrosion. It provides basic data and decision-making basis for the selection, design, maintenance, and management of grounding materials in industries such as the power industry, reduces grounding accidents, and ensures safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is a schematic diagram of the structure of the on-line monitoring system for ground corrosion of the present application.

[0053] Figures indicate: 1. sensor unit; 2. test cable; 3. ground current test box; 4. detection equipment box; 5. equipment support column; 6. down conductor cable; 7. transmission line; 8. energy supply; 9. cement foundation pier; 10. electrical equipment; 11. insulation plate; 12. insulation bolt. DETAILED DESCRIPTION

[0054] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0055] Unless otherwise specified, the raw materials and catalysts in the examples of this application were purchased from commercial sources.

[0056] According to an embodiment of the present application

[0057] The power grounding corrosion online monitoring system, also known as the power grounding corrosion perception and safety early warning system, mainly consists of the following parts:

[0058] (1) Soil electrochemical corrosion and corrosion rate sensor unit

[0059] (2) Grounding grid AC and DC current sensor unit

[0060] (3) Integrated data acquisition and transmission device

[0061] (4) Host computer system

[0062] The soil physical and chemical properties sensor unit and the grounding grid current sensor unit are responsible for reflecting key data that affects the corrosiveness of grounded soil. The data acquisition unit converts these data into digital signals, which are then transmitted to the host computer system via the transmission unit, forming a test hardware system. Technicians or managers can remotely measure, record, and analyze soil corrosion conditions and grounding material corrosion data.

[0063] Among them, the soil corrosive parameter sensor test includes: soil resistivity, soil redox potential, natural potential of grounding material in soil, soil pH value, soil moisture content, grounding grid grounding electrode current, and material corrosion rate.

[0064] The data acquisition and transmission unit can use mains electricity, solar energy, or wind energy as a supplemental power source. System sensors transmit soil corrosivity data via wired or wireless networks to a host computer software platform or cloud system. Using big data statistics and analytical modeling, decision-making data is generated and provided to production and management personnel. Based on this data, management personnel make decisions on the grounding corrosion status, anti-corrosion measures, design, and maintenance parameters, forming intelligent management strategies.

[0065] Soil corrosivity can be assessed using the multi-index method. Scoring the environmental corrosion level and correcting the soil corrosivity level based on the grounding grid's ground current value can be used. The assessment results can serve as a basis for grounding grid material selection, operation, and maintenance. The long-term accumulation of corrosion test specimen erosion rates can be used to calculate grounding material corrosion losses, yielding an accurate corrosion rate that can be used to provide early warning of grounding grid corrosion incidents.

[0066] Example 1

[0067] An online monitoring system for electric grounding corrosion comprises an equipment support column (5) and a cement foundation pier (9) for fixing on soil, wherein the equipment support column (5) is fixedly or detachably connected to the cement foundation pier (9), and a supplementary power supply (8) is provided at the top of the equipment support column (5), and the supplementary power supply (8) is solar energy;

[0068] The ground corrosion online monitoring system further comprises a sensor unit (1), a monitoring device box, and a ground current test box (3) connected in sequence;

[0069] The monitoring equipment box and the ground current test box (3) are arranged on the equipment support column (5), and the sensor unit (1) is arranged in the soil;

[0070] The sensor unit (1) is connected to the monitoring equipment box via a test cable (2); the sensor unit includes a sensor made of the same material as the grounding grid,

[0071] Among them, the soil physical and chemical properties include soil resistivity, soil redox potential, natural potential of grounding materials in the soil, soil pH value, soil moisture content, material corrosion rate, microbial parameters, AC and DC stray currents, and electromagnetic fields.

[0072] The ground current test box (3) is connected in series to a down conductor cable (6) between the transformer substation equipment and the grounding grid; the ground current test box (3) includes a grounding grid current sensor.

[0073] The lower lead cable is connected to the substation equipment on the insulating connecting plate (11) through an insulating bolt (12).

[0074] The monitoring equipment box is connected to the external centralized control platform via a CAN bus cable.

[0075] The sensing unit is used to monitor soil physical and chemical properties in real time;

[0076] The grounding grid current sensor is used to monitor the grounding grid grounding electrode current in real time;

[0077] The sensing unit and grounding grid current sensor are responsible for reflecting key data that affects the corrosiveness of the grounded soil. The monitoring equipment box then converts the real-time sensed and collected data into digital signals and transmits them to the remote host software platform of the centralized control platform to evaluate the soil corrosiveness. Technicians or managers can remotely measure, record, and analyze soil corrosion conditions and grounding material corrosion data.

[0078] The assessment may adopt a multi-index method to determine the corrosion level of the environmental soil through a score, and to correct the environmental soil corrosivity level with reference to the ground current value of the grounding grid. Specifically, for the corrosion of the soil grounded by power transmission towers, the indicators used include: soil texture, soil resistivity, soil redox potential, soil Cl ion content, and soil pH value. Among them, soil texture and Cl ion content are inherent indicators of the soil and can be obtained through a one-time test. Combined with the online monitored soil resistivity and soil redox potential indicators, the soil corrosion level is comprehensively evaluated through a scoring method. The DC current corrosion rate of the grounding electrode is calculated using the DC current intensity of the grounding grid and Faraday's law. The AC current corrosion rate is calculated using the AC current intensity of the grounding grid and an empirical formula. The calculation results are used to correct the environmental soil corrosion level.

[0079] This online monitoring system for power grounding corrosion monitors the key soil corrosion parameters and material erosion rates that affect the grounding materials of the power grounding grid. It can be used to comprehensively assess the corrosion of the grounding materials of the grounding grid, obtain the power grounding corrosion situation by accumulating long-term data and integrating multiple corrosion factor tests and analyses, and can be used to estimate the remaining service life of the grounding grid.

[0080] Example 2

[0081] The online monitoring system for electric grounding corrosion is the same as that in Example 1, except that the monitoring equipment box is connected to an external centralized control platform via a 485 cable, and the centralized control platform includes a local industrial computer.

[0082] Online soil corrosivity parameter monitoring sensors and corrosion coupon corrosion rate monitoring sensors collect data, convert it into digital signals through the data acquisition device built into the monitoring equipment box, and transmit it to the on-site industrial computer via a 485 cable. The industrial computer stores and calculates the collected data, generating soil corrosivity assessment results and grounding grid status analysis for on-site personnel to use and assist in decision-making. This example does not utilize remote data transmission, and the monitoring data does not pass through open networks, making it suitable for confidential data requirements.

[0083] The above descriptions are merely a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application discloses the preferred embodiments as above, they are not intended to limit the present application. Any technical personnel familiar with the present profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A ground corrosion online monitoring system, characterized in that: It includes an equipment support column and a cement foundation pier for fixing on the soil, the equipment support column is fixedly connected or detachably connected to the cement foundation pier, and a power supply is provided at the top of the equipment support column; The ground corrosion online monitoring system also includes a sensor unit, a monitoring equipment box, and a ground current test box connected in sequence; The monitoring equipment box and the ground current test box are arranged on the equipment support column, and the sensor unit is arranged in the soil; The sensor unit is connected to the monitoring equipment box via a test cable; The ground current test box is connected in series to the down conductor cable between the ground terminal of the electrical equipment and the grounding grid; The monitoring equipment box is connected to the external centralized control platform via a transmission line or a wireless network; The sensing unit includes a plurality of sensors for in-situ monitoring of soil physical and chemical properties.

2. The ground corrosion online monitoring system according to claim 1 is characterized in that: The monitoring equipment box transmits the data sensed and collected by the sensor unit and the ground current test box in real time to the centralized control platform for evaluating the soil corrosivity.

3. The on-line monitoring system for ground corrosion according to claim 2 is characterized in that: The evaluation includes combining the real-time monitored physical and chemical performance data with the inherent indicators of the soil to score, comprehensively evaluating the corrosion level of the environmental soil through the scores, and correcting the environmental soil corrosiveness level with reference to the grounding current value of the grounding grid; Wherein, the soil inherent indicators include soil texture and soil Cl ion content.

4. The on-line monitoring system for ground corrosion according to claim 1 is characterized in that: The sensor is made of the same material as the grounding grid.

5. The on-line monitoring system for ground corrosion according to claim 1 is characterized in that: The soil physical and chemical properties include soil resistivity, soil redox potential, natural potential of grounding materials in the soil, soil pH value, material corrosion rate, and AC and DC stray currents.

6. The on-line monitoring system for ground corrosion according to claim 1 is characterized in that: The ground current test box includes a sensor for monitoring the grounding electrode current of the grounding grid.

7. The on-line monitoring system for ground corrosion according to claim 1 is characterized in that: The transmission line is selected from at least one of optical fiber, CAN bus cable and 485 cable.

8. The on-line monitoring system for ground corrosion according to claim 1 is characterized in that: The energy supplement power source is selected from at least one of city electricity, solar energy and wind energy.

9. The on-line monitoring system for ground corrosion according to claim 1, characterized in that: The external centralized control platform includes at least one of a local industrial computer, a remote host computer software platform, and a cloud system.

10. Application of at least one of the ground corrosion online monitoring systems according to any one of claims 1 to 9 in the fields of electricity, construction, computers, industrial and mining enterprises, and communications.

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