Corrosion protection method, device and equipment for down lead of grounding grid of transformer substation

Abstract

The invention provides a corrosion protection method, device and equipment for a down lead of a grounding grid of a transformer substation. The device comprises a viscoelastic body adhesive tape and a plurality of sacrificial anode blocks, the sacrificial anode blocks are arranged in a stone layer and a soil layer, each sacrificial anode block is connected with a down lead of a transformer substation grounding grid, the sacrificial anode blocks provide cathode protection current for the down lead, and the viscoelastic body adhesive tape is wound on the surface of the down lead so as to achieve corrosion protection of the down lead. The reliability of corrosion protection of the down lead of the grounding grid of the transformer substation can be improved, and safe and stable operation of the whole grounding grid is further guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of the downlead of a substation grounding grid, and particularly relates to a corrosion protection method, device, and equipment for the downlead of a substation grounding grid. Background Art

[0002] The grounding grid is a very important device in a power system substation. It is buried underground and consists of a grid-shaped grounding conductor. Large power equipment on the surface of the substation, such as transformers, circuit breakers, voltage transformers, current transformers, isolating switches, etc., are connected to the grounding grid underground through multiple downleads, and the downleads play a role in conducting current. The fault current and lightning strike current of large equipment in the substation can be introduced into the grounding grid through the grounding downlead in the first time, and then discharged deep into the earth, which plays a crucial role in protecting the safety of the main equipment.

[0003] The downlead generally uses carbon steel or galvanized steel. When it is buried underground for a long time, it will be eroded by corrosive media in the soil, such as chloride ions, sulfate ions, oxygen, pH value, salt content, etc. The downlead is oxidized and corroded as the anode; at the same time, there are stray currents in the soil, and their magnitude and direction are uncertain. After the stray current in the soil flows into the downlead, it will flow out of the downlead from the far point and enter the soil, and anode corrosion will occur at the place where the current flows out. In order to ensure that the downlead material can withstand the corrosion caused by soil media, stray currents, etc., generally, anti-corrosion treatment is carried out on the buried horizontal downlead, and hot-dip galvanizing or coating anti-corrosion methods are used to improve the anti-corrosion performance of the grounding grid and extend the service life of the grounding material.

[0004] Due to the diversity of corrosion factors (for example, gaps will be formed where the downlead is close to electrical equipment and buildings, rainwater and pollutants in the atmosphere will accumulate at the gaps, and corrosive media will be concentrated, causing crevice corrosion), simply using hot-dip galvanizing cannot solve the corrosion problem of the downlead. From the on-site investigation data, the corrosion and thinning or even fracture of some hot-dip galvanized downleads also prove this point. Coating anti-corrosion on the surface of steel structures is a commonly used method, generally configured in the form of zinc-rich primer - epoxy mica iron intermediate paint - topcoat. The coating can not only isolate corrosive media, but also the zinc in the paint is an active metal, playing the role of sacrificial anode cathodic protection. However, on-site investigation found that the coating anti-corrosion effect is not ideal. In the 20 cm area where the grounding downlead contacts the soil, the grounding conductor is severely corroded. In addition to the oxygen concentration difference corrosion in this area, at the same time, the coating is worn and contacted by hard substances in the soil, which will cause the coating to be damaged, exposing the base material and causing corrosion of the grounding downlead. Summary of the Invention

[0005] In view of at least one problem in the prior art, the present application proposes a corrosion protection method, device and equipment for the downlead of a substation grounding grid, which can improve the reliability of the corrosion protection of the downlead of the substation grounding grid, and thus ensure the safe and stable operation of the entire grounding grid.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] In a first aspect, the present application provides a corrosion protection device for the downlead of a substation grounding grid, including: viscoelastic tape and a plurality of sacrificial anode blocks; each of the sacrificial anode blocks is disposed in the pebble layer and the soil layer, and each sacrificial anode block is connected to the downlead of the substation grounding grid. The sacrificial anode block provides cathodic protection current to the downlead, and the viscoelastic tape is wound around the surface of the downlead to achieve corrosion protection of the downlead.

[0008] In an embodiment, the corrosion protection device for the downlead of the substation grounding grid further includes: a reference electrode and a cathodic protection test pile;

[0009] The reference electrode is buried in the pebble layer and the soil layer, and the cathodic protection test pile is respectively connected to the reference electrode and the downlead; the cathodic protection test pile is used to measure the potential of the reference electrode and the potential of the downlead.

[0010] In an embodiment, the downlead is divided into: an atmosphere part, a pebble layer part and a soil layer part; the viscoelastic tape completely covers the surface of the atmosphere part of the downlead, completely covers the surface of the pebble layer part of the downlead, and completely covers the surface from the connection of the pebble layer part and the soil layer part of the downlead to a preset depth in the soil layer part of the downlead.

[0011] In an embodiment, the sacrificial anode block is an anode block made of zinc alloy or magnesium alloy.

[0012] In an embodiment, the reference electrode is a copper / copper sulfate electrode pair.

[0013] In an embodiment, the corrosion protection device for the downlead of the substation grounding grid further includes: a sensor group disposed at each of the sacrificial anode blocks, and the sensor group includes at least one of a temperature sensor, a humidity sensor and a pH sensor.

[0014] In a second aspect, the present application provides a corrosion protection method for the downlead of a substation grounding grid, which is implemented by applying the corrosion protection device for the downlead of the substation grounding grid. The method includes:

[0015] Obtain the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile, and obtain an evaluation result of the corrosion protection effect of the downlead according to the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides cathodic protection current to the downlead.

[0016] In a third aspect, the present application provides a corrosion protection device for a downlead of a substation grounding grid, including:

[0017] An acquisition module, configured to acquire the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile;

[0018] An evaluation module, configured to obtain an evaluation result of the corrosion protection effect of the downlead according to the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides cathodic protection current to the downlead.

[0019] In a fourth aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the corrosion protection method for the downlead of the substation grounding grid described above is implemented.

[0020] In a fifth aspect, the present application provides a computer-readable storage medium, on which computer instructions are stored. When the instructions are executed by a processor, the corrosion protection method for the downlead of the substation grounding grid described above is implemented.

[0021] As can be seen from the above technical solutions, the present application provides a corrosion protection method, device and equipment for a downlead of a substation grounding grid. Among them, the device includes: viscoelastic tape and a plurality of sacrificial anode blocks; each of the sacrificial anode blocks is arranged in the gravel layer and the soil layer, and each sacrificial anode block is connected to the downlead of the substation grounding grid. The sacrificial anode block provides cathodic protection current to the downlead, and the viscoelastic tape is wound around the surface of the downlead to achieve corrosion protection of the downlead. It can reduce the corrosion rate of the atmospheric part, gravel layer part, and soil layer part of the grounding downlead, effectively protect the entire grounding downlead, reduce the risk of corrosion fracture and thinning of the grounding downlead, and ensure the safe and stable operation of the entire grounding grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1It is the first structural schematic diagram of the corrosion protection device for the down-lead of the substation grounding grid in the embodiment of the present application;

[0024] Figure 2 It is the second structural schematic diagram of the corrosion protection device for the down-lead of the substation grounding grid in the embodiment of the present application;

[0025] Figure 3 It is the flow schematic diagram of the corrosion protection method for the down-lead of the substation grounding grid in the embodiment of the present application;

[0026] Figure 4 It is the structural schematic diagram of the corrosion protection equipment for the down-lead of the substation grounding grid in the embodiment of the present application;

[0027] Figure 5 It is the system composition schematic block diagram of the electronic device in the embodiment of the present application.

[0028] Symbol description

[0029] 1. Electrical equipment; 2. Down-lead; 3. Atmosphere above ground; 4. Gravel layer; 5. Soil layer; 6. Sacrificial anode block; 7. Connecting wire; 8. Viscoelastic tape; 9. Horizontal grounding grid; 10. Reference electrode; 11. Cathodic protection test pile. Specific implementation manner

[0030] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] The down-lead is a crucial device connecting electrical equipment and the underground grounding grid, and its operating state and performance directly affect whether the fault current and lightning current can be quickly and normally introduced into the ground. The structure of the grounding down-lead generally uses round steel or flat steel, which is vertically downward after being connected to the electrical equipment in the atmosphere and will be bent after entering the soil, and finally is connected to the horizontal grounding grid in the buried soil by welding. Currently, the materials of the grounding down-leads of 110kV and 220kV substations in service generally use galvanized steel, and the grounding down-leads of older substations still use carbon steel bare steel. Through a large number of on-site investigations, it is found that the corrosion failure of the grounding down-lead is a high-frequency area for the occurrence of faults in the entire grounding grid. The reasons for its corrosion are analyzed as follows:

[0032] (1) Some down conductors that have been in operation for a long time are made of carbon steel, which has poor corrosion resistance. (2) During the installation and construction process, the down conductors are bent a lot in order to keep close to the surface of the building. The protective oxide film on the surface of the metal material is damaged at the bends, exposing the base material and making it easy to corrode. (3) The down conductors are easily affected by strong winds, equipment vibrations, etc. in the atmosphere, which causes stress corrosion over time and the roots are prone to corrosion and fracture. (4) The down conductors are in both the atmospheric environment and the soil environment. When the down conductor enters the soil surface at a depth of 5 cm from the atmosphere, the oxygen concentration drops significantly, forming an oxygen concentration cell. The area of ​​the down conductor in the atmosphere is very small. The area with high oxygen concentration is the cathode, and the area where the down conductor is in the soil with low oxygen concentration is the anode. Anodic corrosion occurs at this location, causing the down conductor to corrode, thin, or even break. (5) In the area where the down conductor in the atmosphere contacts electrical equipment, some of them are connected by bolts. The material properties of the bolts and nuts are too different from those of the down conductor, which causes galvanic corrosion. The electrode potential of the bolts and nuts is high, and the electrode potential of the down conductor is low. The dissolution rate of the metal anode of the down conductor with low electrode potential increases, causing contact galvanic corrosion. (6) Gaps will form where the down conductor is close to electrical equipment and buildings. Rainwater and pollutants in the atmosphere will gather in the gaps, and the corrosive medium will concentrate, causing crevice corrosion.

[0033] In summary, due to its crucial role, the performance and status of the down conductor are related to the efficiency of the entire substation grounding. However, after reviewing the literature, field investigation and research, it is found that the power system often pays more attention to the operating status of the buried horizontal grounding network, while ignoring the function and performance of the grounding down conductor.

[0034] Based on this, in order to solve at least one problem existing in the above-mentioned prior art, the embodiments of the present application provide a corrosion protection method, device and equipment for the down conductor of a substation grounding grid. According to the structural characteristics of the down conductor of the grounding grid, and taking into account the atmospheric corrosion, soil corrosion, large current impact and other scenarios faced by the down conductor, a sacrificial anode block is used in the soil to provide a cathodic current to protect the down conductor; in the interface area between the soil and the atmosphere, a viscoelastic tape with good thermal stability is used to wrap around the surface of the down conductor to fully isolate the down conductor from the corrosive medium. At the same time, the viscoelastic tape has better hardness than the coating, which can reduce the impact damage caused by sharp objects such as sand and stones in the soil; in the atmospheric part of the ground, a viscoelastic tape is used to fully isolate the down conductor from the corrosive medium in the atmosphere and protect it from corrosion, which can solve the problem of corrosion protection of the down conductor and ensure the safe and stable operation of the entire grounding grid.

[0035] The corrosion protection method, device and equipment for the down-lead of a substation grounding grid provided by the embodiments of the present application: (1) The sacrificial anode cathodic protection method can be adopted to apply cathodic current to the grounding conductors in the gravel layer and the soil layer, so that the down-leads in this area are protected; specifically, aiming at the anti-corrosion problem of the grounding down-leads in the gravel layer and the soil layer, the sacrificial anode protection method is adopted to provide cathodic protection current to the grounding conductors in this area. The anode block is corroded first, while the grounding conductor is protected from corrosion; (2) The viscoelastic tape can be used to protect the grounding conductors in the ground atmosphere layer, the gravel layer and the 5-cm soil layer, so that the down-leads in this area are fully isolated from the corrosive medium; specifically, aiming at the anti-corrosion problem of the grounding down-leads in the ground atmosphere layer, the viscoelastic tape with good thermal stability can be used for winding anti-corrosion to completely isolate the oxygen, chloride ions, sulfate ions, etc. in the atmosphere from corroding the down-leads. The construction steps of the viscoelastic tape include surface treatment of the grounding conductor, application of anti-corrosion paste, tape winding, etc.; aiming at the problem that the conductivity of the gravel layer is poor and the efficiency of the cathodic protection current flowing from the gravel layer into the grounding conductor is low for the grounding down-leads in the gravel layer, the viscoelastic tape is used to protect and wind the gravel layer area. The strength of the viscoelastic tape is better than that of the ordinary anti-corrosion coating and will not be damaged due to the collision between the gravels in the gravel layer. For the protection effect of the viscoelastic tape, the anti-corrosion tape is wound through the gravel layer and reaches 5 cm into the soil layer; (3) The cathodic protection test pile can be introduced, and the long-term copper / copper sulfate reference electrode is buried in the soil. The reference is close to the grounding down-lead conductor, and the working electrode lead is connected to the grounding conductor, so as to monitor the cathodic protection potential of the grounding down-lead in real time; the cathodic protection effect of the grounding down-lead can be known, and the cathodic protection potential can be monitored in real time; (4) Through case analysis, it is demonstrated that the corrosion protection method, device and equipment for the down-lead of the substation grounding grid provided by the embodiments of the present application have achieved beneficial effects in reducing the corrosion of the grounding down-lead.

[0036] Specifically, it is described through the following various embodiments.

[0037] In order to improve the reliability of the corrosion protection of the down-lead of the substation grounding grid, and further ensure the safe and stable operation of the entire grounding grid, as Figure 1 shown, this embodiment provides a corrosion protection device for the down-lead of a substation grounding grid, including: a viscoelastic tape 8 and a plurality of sacrificial anode blocks 6; each of the sacrificial anode blocks is arranged in the gravel layer 4 and the soil layer 5, and each of the sacrificial anode blocks is connected to the down-lead 2 of the substation grounding grid. The sacrificial anode block provides cathodic protection current to the down-lead, and the viscoelastic tape is wound around the surface of the down-lead to achieve the corrosion protection of the down-lead.

[0038] Specifically, the electrochemical activity of the sacrificial anode block is higher than that of the down-lead. Preferably, the sacrificial anode block is an anode block made of zinc alloy or magnesium alloy. Each sacrificial anode block can be connected to the down-lead via its respective connecting wire 7. Spiked sacrificial anode blocks can be used in the gravel layer to increase the contact area between the sacrificial anode block and the soil. The sacrificial anode blocks can be arranged in both the gravel layer and the soil layer simultaneously.

[0039] Specifically, the earthing down-lead, i.e., the down-lead, can be made of galvanized steel, with an L-shaped form and a flat cross-section (size 50mm×5mm). The earthing down-lead is located in the ground atmosphere, gravel layer, and soil layer. After being led out from the electrical equipment, it first enters the atmosphere vertically, then enters the gravel layer vertically, penetrates the gravel layer and enters the soil layer vertically, and turns horizontal in the soil layer to connect with the horizontal earthing grid 9 in the soil layer. The viscoelastic tape can be a viscoelastic tape with high thermal stability, strong adhesiveness, good wrapping property, high corrosion resistance, and excellent surface strength performance. It completely covers the above-ground atmosphere part of the down-lead, completely covers the gravel layer of the down-lead, and is wound and covered by 5 cm in the soil layer of the down-lead.

[0040] In order to monitor the corrosion protection effect of the earthing down-lead of the substation earthing grid, as Figure 2 shown, in one embodiment, the corrosion protection device for the earthing down-lead of the substation earthing grid further includes: a reference electrode 10 and a cathodic protection test pile 11; the reference electrode is buried in the gravel layer and the soil layer, and the cathodic protection test pile is respectively connected to the reference electrode and the down-lead; the cathodic protection test pile is used to measure the potential of the reference electrode and the potential of the down-lead.

[0041] Specifically, a copper / copper sulfate reference electrode that is long-term buried in the soil can be used. Taking the earthing down-lead conductor (i.e., the down-lead) as the working electrode, and fixing the lead terminal in a closed box, which is called the cathodic protection test pile, can realize the real-time online monitoring of the cathodic protection potential of the earthing down-lead conductor.

[0042] The sacrificial anode block can produce the effect of sacrificial anode cathodic protection. The cathodic protection current enters the down-lead along with the soil, and the place where the current flows in is protected from corrosion. It can protect the earthing conductor in the soil from corrosion. However, a large part of the earthing down-lead is in the atmosphere, and due to the atmospheric insulation in this area, the down-lead conductor cannot receive the protection current. Based on this, in order to improve the reliability of the corrosion protection of the down-lead in the atmosphere part, in one embodiment, the down-lead is divided into: an atmosphere part, a gravel layer part, and a soil layer part; the viscoelastic tape completely covers the surface of the atmosphere part of the down-lead, completely covers the surface of the gravel layer part of the down-lead, and completely covers the surface from the connection between the gravel layer part and the soil layer part of the down-lead to a preset depth in the soil layer part of the down-lead.

[0043] Specifically, the atmosphere part can represent the part of the downcomer in the ground atmosphere 3, the pebble layer part can represent the part of the downcomer in the pebble layer, and the soil layer part can represent the part of the downcomer in the soil layer. The preset depth can be set according to the actual situation. Preferably, the preset depth is 5 cm. The reference electrode can be a copper / cupric sulfate electrode pair.

[0044] In order to monitor the soil state in real time, in one embodiment, the corrosion protection device for the downcomer of the substation grounding grid further includes: a sensor group arranged at each sacrificial anode block, and the sensor group includes at least one of a temperature sensor, a humidity sensor, and a pH value sensor.

[0045] Each sensor can be wirelessly communicatively connected to the corrosion protection device of the downcomer of the substation grounding grid.

[0046] To further illustrate the present solution, the present application provides an application example of a corrosion protection device for the downcomer of a substation grounding grid. In this application example, its main devices include: a sacrificial anode block 6, a connecting wire 7 between the anode block and the protected metal, a viscoelastic tape 8, a horizontal grounding grid 9, a reference electrode 10, and a cathodic protection test pile 11. Among them, the downcomer 2 is connected to the electrical equipment 1, and the downcomer 2 includes parts of the ground atmosphere 3, the pebble layer 4, and the soil layer 5.

[0047] The electrical equipment 1 is a general term for equipment such as transformers, circuit breakers, disconnectors, voltage transformers, current transformers, and gantries in the substation.

[0048] For the downcomer 2, each electrical equipment is equipped with a grounding downcomer to timely introduce the short-circuit current and lightning current in the electrical equipment into the ground to protect the electrical equipment from harm. The grounding downcomer is generally L-shaped. Generally, after being led out from the electrical equipment, it vertically enters the pebble layer and the soil layer, turns horizontally in the soil layer, and finally connects to the horizontal grounding grid in the soil layer.

[0049] The ground atmosphere 3 is the part of the grounding downcomer that is exposed to the atmosphere above the ground after being connected to the electrical equipment and is above the pebble layer.

[0050] The pebble layer 4 is located between the ground atmosphere and the soil layer, about 15 - 20 cm. It mainly exists in the form of sand and stone particles and is laid on the soil layer. Since the hardness of the pebbles is greater than that of the soil, it plays the role of a hard and neat road surface. There are gaps between the pebbles in the pebble layer, and there will be some oxygen, which will cause oxygen concentration difference battery corrosion. At the same time, the pebble layer is not compact, has poor conductivity, and the cathodic protection current circulation ability is weak, so the cathodic protection effect is not good.

[0051] The soil layer 5, the part below the gravel layer, is the main carrier of the substation grounding grid. The entire horizontal grounding grid is buried in the soil layer, and the short-circuit current and lightning strike current in electrical equipment ultimately drain into the soil layer.

[0052] The sacrificial anode block 6 is an anode block prepared from zinc, magnesium, and aluminum with relatively high electrochemical activity. It is also arranged in both the gravel layer and the soil layer. One end of the anode block is connected to the metal to be protected (the downlead conductor). The anode block corrodes first because it is more active than the metal to be protected. Metal ions enter the soil and flow towards the downlead conductor, and electrons flow into the conductor through the connection line between the sacrificial anode block and the downlead conductor, forming a current loop: sacrificial anode block - soil - downlead conductor - connection line - sacrificial anode block. The current flows through the soil into the area where the metal to be protected, and the grounding conductor is protected from corrosion.

[0053] The connection line 7 is a device that connects the metal to be protected (the downlead conductor) and the sacrificial anode block, with good electrical conductivity. Electrons flow from the anode block to the downlead conductor through the connection line.

[0054] The viscoelastic tape 8 is a viscoelastic tape with high thermal stability, strong adhesiveness, good wrapping property, high corrosion resistance, and excellent surface strength performance. It is directly wound around the surface of the downlead conductor to isolate the corrosive medium. At the same time, the viscoelastic tape has a certain strength, and the part buried in the gravel layer and the soil layer will not be damaged by gravel collision, thus affecting the anti-corrosion effect.

[0055] The horizontal grounding grid 9 is in the soil layer and is the main part of the entire substation grounding grid. It is constructed into a network structure by a large number of grounding conductors in the horizontal direction, and the grounding downleads of all electrical equipment will ultimately be connected to the same horizontal grounding grid.

[0056] The reference electrode 10 is buried in the soil and is used to monitor the cathodic protection potential. It serves as a reference for measuring the potential and uses a copper / cuprous sulfate electrode pair with extremely good potential stability.

[0057] The cathodic protection test pile 11 is, according to the standard specifications, the potential of the cathodic protection system needs to be below -850 mV (relative to the copper / cuprous sulfate reference electrode). The cathodic protection system test pile is a device used to measure the cathodic protection potential and is composed of a reference electrode lead and a working electrode lead. The reference electrode lead is connected to the reference electrode in the soil, and the working electrode lead is connected to the grounding downlead conductor.

[0058] In order to improve the reliability of the corrosion protection of the downleads of the substation grounding grid and thus ensure the safe and stable operation of the entire grounding grid, this embodiment provides a corrosion protection method for the downleads of the substation grounding grid, where the corrosion protection device for the downleads of the substation grounding grid includes but is not limited to a server, such as Figure 3As shown, the method specifically includes the following content:

[0059] Step 100: Obtain the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile.

[0060] Specifically, the cathodic protection test pile can be a server, and the corrosion protection device can be the cathodic protection test pile.

[0061] Step 200: Obtain an evaluation result of the corrosion protection effect of the downlead according to the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides cathodic protection current to the downlead.

[0062] Specifically, if the difference between the potential of the reference electrode and the potential of the downlead is less than the potential difference threshold, it can be determined that the evaluation result of the corrosion protection effect of the downlead is excellent, otherwise it is poor. Preferably, the potential difference threshold is -850mv.

[0063] In order to improve the reliability of the remaining life prediction of the sacrificial anode block, and further improve the reliability of the corrosion protection of the downlead of the substation grounding grid, in an embodiment of the present application, the corrosion protection method for the downlead of the substation grounding grid further includes: obtaining the soil data collected by the sensor group at each sacrificial anode block, where the soil data includes: temperature, humidity, and pH value; determining the remaining life of the sacrificial anode block according to the soil data collected by the sensor group at each sacrificial anode block and a preset sacrificial anode block remaining life prediction model, where the preset sacrificial anode block remaining life prediction model is obtained by pre-training a classification algorithm based on a batch of historical soil data and their respective corresponding actual remaining lives of the sacrificial anode blocks; if there is a sacrificial anode block with a remaining life less than the life threshold among the sacrificial anode blocks, output a warning prompt message for the sacrificial anode block, and the warning prompt message may include: the location information of the sacrificial anode block.

[0064] From a software perspective, in order to improve the reliability of the corrosion protection of the downlead of the substation grounding grid, and further ensure the safe and stable operation of the entire grounding grid, the present application provides an embodiment of a corrosion protection device for the downlead of the substation grounding grid for implementing all or part of the content in the corrosion protection method for the downlead of the substation grounding grid. See Figure 4 The corrosion protection device for the downlead of the substation grounding grid specifically includes the following content:

[0065] An acquisition module 01, configured to obtain the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile.

[0066] An evaluation module 02 is configured to obtain an evaluation result of the corrosion protection effect of the downlead based on the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides a cathodic protection current to the downlead.

[0067] The embodiment of the corrosion protection device for the downlead of the substation grounding grid provided in this specification can specifically be used to execute the processing flow of the embodiment of the above-mentioned corrosion protection method for the downlead of the substation grounding grid. Its functions will not be elaborated here, and reference can be made to the detailed description of the embodiment of the corrosion protection method for the downlead of the substation grounding grid above.

[0068] Currently, the main idea for the corrosion protection of the downlead of the substation grounding grid is to use an anti-corrosion coating. This anti-corrosion coating has a bright color, and its main function is to play a role in making the above-ground part eye-catching due to its color characteristics. Its anti-corrosion effect is poor, which can be proved by the fact that a large number of grounding downleads are corroded. At the same time, this idea does not consider the complex scenarios such as the atmosphere layer, gravel layer, and soil layer where the downlead is located, and its anti-corrosion method is not comprehensive enough. From the above description, it can be seen that the corrosion protection method for the downlead of the substation grounding grid provided by the embodiments of this application can consider the corrosion environments faced by the grounding conductors in the atmosphere layer, gravel layer, and soil layer at the same time, and use cathodic protection and viscoelastic tape to systematically solve the problems of the entire downlead, filling the gap in this field.

[0069] Figure 5 It is a schematic diagram of the physical structure of an electronic device provided for an embodiment of the present invention. As Figure 5 shown, the electronic device includes: a memory 501, a processor 502, and a computer program stored on the memory 501 and executable on the processor 502. When the processor 502 executes the computer program, the following method is implemented:

[0070] Obtain the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile, and obtain an evaluation result of the corrosion protection effect of the downlead based on the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides a cathodic protection current to the downlead.

[0071] This embodiment discloses a computer program product, which includes a computer program. When the computer program is executed by a processor, the following method is implemented:

[0072] Obtain the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile, and obtain an evaluation result of the corrosion protection effect of the downlead based on the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides a cathodic protection current to the downlead.

[0073] This embodiment provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the following method is implemented:

[0074] Obtain the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile, and obtain an evaluation result of the corrosion protection effect of the downlead according to the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides cathodic protection current to the downlead.

[0075] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0076] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of processes and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0077] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0078] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1Steps of the functions specified in one or more boxes.

[0079] In the description of this specification, the description with reference to terms such as "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0080] The above-described specific embodiments have further elaborated on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A corrosion protection device for the downlead of a substation grounding grid, characterized in that Comprising: A viscoelastic tape and a plurality of sacrificial anode blocks; Each of the sacrificial anode blocks is disposed in the gravel layer and the soil layer, and each sacrificial anode block is connected to the downlead of the substation grounding grid. The sacrificial anode block provides cathodic protection current to the downlead, and the viscoelastic tape is wound around the surface of the downlead to achieve corrosion protection of the downlead.

2. The corrosion protection device for the downlead of the substation grounding grid according to claim 1, wherein, Further comprising: A reference electrode and a cathodic protection test pile; The reference electrode is buried in the gravel layer and the soil layer, and the cathodic protection test pile is respectively connected to the reference electrode and the downlead; the cathodic protection test pile is used to measure the potential of the reference electrode and the potential of the downlead.

3. The corrosion protection device for the downlead of the substation grounding grid according to claim 1, wherein The downlead is divided into: an atmosphere part, a gravel layer part and a soil layer part; The viscoelastic tape completely covers the surface of the atmosphere part of the downlead, completely covers the surface of the gravel layer part of the downlead, and completely covers the surface from the connection of the gravel layer part and the soil layer part of the downlead to a preset depth in the soil layer part of the downlead.

4. The corrosion protection device for the downlead of the substation grounding grid according to claim 1, characterized in that, The sacrificial anode block is an anode block made of zinc alloy or magnesium alloy.

5. The corrosion protection device for the downlead of the substation grounding grid according to claim 2, characterized in that, The reference electrode is a copper / cupric sulfate electrode pair.

6. The corrosion protection device for the downlead of the substation grounding grid according to claim 1, characterized in that, Further comprising: A sensor group disposed at each of the sacrificial anode blocks, and the sensor group includes at least one of a temperature sensor, a humidity sensor and a pH value sensor.

7. A corrosion protection method for the downlead of a substation grounding grid, characterized in that, Implemented by using the corrosion protection device for the downlead of the substation grounding grid according to any one of claims 1 to 6, and the method includes: Obtaining the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile, and obtaining an evaluation result of the corrosion protection effect of the downlead according to the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides cathodic protection current to the downlead.

8. An anti-corrosion protection device for the downlead of a substation grounding grid, characterized in that, Comprising: An acquisition module for obtaining the potential of the reference electrode and the potential of the downlead measured by the cathodic protection test pile; An evaluation module for obtaining an evaluation result of the corrosion protection effect of the downlead according to the potential of the reference electrode and the potential of the downlead; the sacrificial anode block provides cathodic protection current to the downlead.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the corrosion protection method for the downlead of the substation grounding grid according to claim 7.

10. A computer-readable storage medium having computer instructions stored thereon, characterized in that, When the instruction is executed by the processor, it implements the corrosion protection method for the downlead of the substation grounding grid according to claim 7.

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