Corrosion monitoring system for grounding grid of electric power system

Abstract

The utility model discloses a corrosion monitoring system for a grounding grid of an electric power system, which comprises a front-end grounding grid corrosion detection unit and a rear-end data comparison test unit, and the front-end grounding grid corrosion detection unit further comprises a three-electrode state sensor, an excitation module, a detector, a data acquisition module and a microprocessor, the rear-end data comparison test unit further comprises an upper computer and a cloud platform, the soil corrosion rate is obtained through data comparison of electrochemical reaction and polarization potential generated by the monitoring electrode and natural corrosion potential of the reference electrode, the microprocessor transmits the soil corrosion rate to the upper computer, and the cloud platform transmits the soil corrosion rate to the upper computer. The upper computer transmits the soil corrosion rate to the cloud platform through the wireless network, so that remote monitoring is realized, the tedious process that only small-scale monitoring can be carried out and monitoring data needs to be transmitted to a monitoring center through a special network in the prior art is broken, limitation of off-line operation is avoided, and large-area and large-scale monitoring of the corrosion condition of the grounding grid is realized.

Description

Technical Field

[0001] This utility model relates to the field of corrosion monitoring, and in particular to a corrosion monitoring system for power system grounding grids. Background Technology

[0002] With the continuous development and expansion of power systems, the safe and stable operation of power system grounding grids has become crucial. As an important component of the power system, the grounding grid's primary function is to provide a low-impedance discharge path for fault currents and lightning currents, ensuring the safety of power equipment and personnel. However, because grounding grids are buried underground for extended periods, they are susceptible to corrosion and damage due to factors such as soil chemical and electrochemical corrosion and stray currents. This reduces the conductivity and service life of the grounding grid, posing a serious threat to the safe operation of the power system.

[0003] In existing technologies, power system grounding grid corrosion monitoring typically involves installing sensors on the grounding down conductor and monitoring and recording data using mobile terminal devices held by staff. This process is cumbersome and limited by offline operation, allowing only small-scale monitoring.

[0004] Therefore, it is necessary to propose a power system grounding grid corrosion monitoring system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a power system grounding grid corrosion monitoring system to solve the problem that monitoring and recording data through mobile terminal devices in the hands of staff is cumbersome, and is limited to small-scale monitoring due to offline operation.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A power system grounding grid corrosion monitoring system includes a front-end grounding grid corrosion detection unit and a back-end data comparison and testing unit. The front-end grounding grid corrosion detection unit further includes:

[0008] The three-electrode state sensor is used to accurately measure the electrochemical reactions occurring on the research electrodes. An excitation module is electrically connected to the three-electrode state sensor. A detector module is electrically connected to the three-electrode state sensor. A data acquisition module is electrically connected to the detector module. A microprocessor is electrically connected to the data acquisition module. The back-end data comparison and testing unit also includes: a host computer connected to the microprocessor using a custom communication protocol; and a cloud platform that interfaces with the host computer via wireless network information transmission.

[0009] Preferably, the three-electrode state sensor includes a research electrode, an auxiliary electrode, and a reference electrode. The three electrodes are fixed at equal intervals and have wires leading out from their upper ends for applying potential to induce a polarization reaction.

[0010] Preferably, the excitation module includes a step current signal module, which is used to apply an excitation step signal between the auxiliary electrode and the research electrode.

[0011] Preferably, the detector module is configured to detect the polarization potential between the auxiliary electrode and the research electrode, and the natural corrosion potential of the reference electrode.

[0012] Preferably, the data acquisition module includes a voltage data acquisition module, which is used to acquire polarization voltage data between the auxiliary electrode and the research electrode.

[0013] Preferably, the microprocessor analyzes the data sampling signal controlled by the step current signal to obtain the soil corrosion rate.

[0014] Preferably, the host computer enables the microprocessor module control section to transmit the calculated soil corrosion rate to the host computer via a custom communication protocol.

[0015] Preferably, the host computer transmits the soil corrosion rate to the cloud platform via a wireless network to achieve remote monitoring.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] In this invention, the electrochemical reaction occurring at the electrodes is monitored by a front-end grounding grid corrosion detection unit. The soil corrosion rate is obtained by comparing the polarization potential with the natural corrosion potential of the reference electrode. The microprocessor in the back-end data comparison and testing unit transmits the calculated soil corrosion rate to the host computer via a custom communication protocol. The host computer then transmits the soil corrosion rate to the cloud platform via a wireless network. This achieves remote monitoring, breaking away from the previous cumbersome process of only being able to conduct small-scale monitoring, requiring monitoring data to be transmitted to the monitoring center via a dedicated network, and requiring staff to install corresponding monitoring terminals. It is not limited by offline operation and enables large-scale monitoring of grounding grid corrosion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a power system grounding grid corrosion monitoring system according to the present invention.

[0019] Figure 2 This is a schematic diagram of the system flowchart structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the three-electrode state sensor structure of this utility model. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides, for example Figure 1-Figure 3 The power system grounding grid corrosion monitoring system shown includes a front-end grounding grid corrosion detection unit and a back-end data comparison and testing unit. The front-end grounding grid corrosion detection unit further includes:

[0023] A three-electrode state sensor is used to accurately measure the electrochemical reactions occurring on the research electrode. The three-electrode state sensor includes a research electrode, an auxiliary electrode, and a reference electrode. The three electrodes are fixed at equal intervals and have wires leading out from their upper ends for applying potential to polarize the reaction.

[0024] The research electrode is where the electrochemical reaction occurring on it is not affected by the electrode's own reaction. The reaction contact area is small. During the polarization reaction, the auxiliary electrode forms a circuit with the research electrode to ensure the smooth flow of current on the research electrode, thus guaranteeing the occurrence of the electrochemical reaction. The reference electrode, as a non-polarized electrode, has no current flowing through it.

[0025] An excitation module is electrically connected to a three-electrode state sensor. The excitation module includes a step current signal module, which applies an excitation step signal between the auxiliary electrode and the research electrode.

[0026] After the step current signal module applies an excitation step signal between the auxiliary electrode and the research electrode, a polarization potential is formed between the research electrode and the auxiliary electrode, while the natural corrosion between the reference electrode forms a natural corrosion potential. The soil corrosion rate can be determined by comparing the polarization potential and the natural corrosion potential.

[0027] The detector module is electrically connected to a three-electrode state sensor. The detector module is used to detect the polarization potential between the auxiliary electrode and the research electrode and the natural corrosion potential of the reference electrode.

[0028] A data acquisition module is electrically connected to the detector module. The data acquisition module includes a voltage data acquisition module, which is used to acquire polarization voltage data between the auxiliary electrode and the research electrode.

[0029] A microprocessor, electrically connected to a data acquisition module, analyzes data sampling signals controlled by a step current signal to obtain the soil corrosion rate.

[0030] The backend data comparison and testing unit also includes:

[0031] The host computer is connected to the microprocessor using a custom communication protocol. The host computer enables the microprocessor module control part to transmit the calculated soil corrosion rate to the host computer through the custom communication protocol.

[0032] The cloud platform connects with the host computer via wireless network, and the host computer transmits the soil corrosion rate to the cloud platform via wireless network to achieve remote monitoring.

[0033] The working principle of this utility model is as follows: In this utility model, the electrochemical reaction of the electrode is monitored by the front-end grounding grid corrosion detection unit. The soil corrosion rate is obtained by comparing the polarization potential with the natural corrosion potential of the reference electrode. The microprocessor in the back-end data comparison test unit transmits the calculated soil corrosion rate to the host computer through a custom communication protocol. The host computer then transmits the soil corrosion rate to the cloud platform via a wireless network. In this way, remote monitoring is realized, allowing relevant personnel to understand the corrosion status of the power system grounding grid in real time from any location with a network connection, so as to take corresponding maintenance and protection measures in a timely manner.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A power system grounding grid corrosion monitoring system, comprising a front-end grounding grid corrosion detection unit and a back-end data comparison and testing unit, characterized in that: The front-end grounding grid corrosion detection unit also includes: Three-electrode state sensor, used to accurately measure and study electrochemical reactions occurring on the electrodes; The excitation module is electrically connected to the three-electrode state sensor; The detector module is electrically connected to the three-electrode state sensor; The data acquisition module is electrically connected to the detector module; The microprocessor is electrically connected to the data acquisition module; The backend data comparison and testing unit also includes: The host computer is connected to the microprocessor using a custom communication protocol; The cloud platform interfaces with the host computer via wireless network information transmission.

2. The power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The three-electrode state sensor includes a research electrode, an auxiliary electrode, and a reference electrode. The three electrodes are fixed at equal intervals and have wires leading out from their upper ends for applying potential to induce a polarization reaction.

3. The power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The excitation module includes a step current signal module, which is used to apply an excitation step signal between the auxiliary electrode and the research electrode.

4. The power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The detection module is designed to detect the polarization potential between the auxiliary electrode and the research electrode, as well as the natural corrosion potential of the reference electrode.

5. A power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The data acquisition module includes a voltage data acquisition module, which is used to acquire polarization voltage data between the auxiliary electrode and the research electrode.

6. A power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The microprocessor analyzes the data sampling signal controlled by the step current signal to obtain the soil corrosion rate.

7. A power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The host computer enables the microprocessor module control section to transmit the calculated soil corrosion rate to the host computer via a custom communication protocol.

8. A power system grounding grid corrosion monitoring system according to claim 1, characterized in that: The host computer transmits the soil corrosion rate to the cloud platform via a wireless network to achieve remote monitoring.

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