Grounding system and power supply and distribution system

Abstract

The utility model relates to a grounding system and a power supply and distribution system, the grounding system comprises a bearing device and a grounding device, a bearing frame of the bearing device is used for bearing at least one electrical device, the grounding device comprises at least three grounding electrodes, and the grounding electrodes are sequentially connected to form a closed loop, a grounding conductor of the electrical equipment is connected to the bearing frame, or the grounding conductor is connected to the grounding device; according to the grounding system provided by the embodiment of the invention, the bearing frame is fully utilized as a fault current discharge channel and then is connected to the grounding device, or the grounding conductors of the electrical equipment are uniformly connected to the grounding device, so that grounding protection of the electrical equipment is realized, and the wiring complexity is reduced while the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety grounding, in particular to a grounding system and a power supply and distribution system. BACKGROUND

[0002] Grounding plays a very important role in the power supply and distribution system. When abnormal operation, lightning surge, equipment failure and other unexpected conditions occur, the grounding device can effectively protect personnel and equipment through the discharge effect.

[0003] The traditional independent grounding method needs to ground each electrical equipment in the power supply and distribution system, which has a complex wiring method and increases the cost. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a grounding system and a power supply and distribution system which can reduce the cost.

[0005] In a first aspect, the present application provides a grounding system, comprising:

[0006] A bearing device comprising a bearing frame, the bearing frame being used for bearing at least one electrical equipment;

[0007] At least two grounding devices connected to the bearing frame, the grounding device comprising at least three grounding poles, each grounding pole being connected in turn to form a closed loop;

[0008] Wherein, the grounding conductor of the electrical equipment is connected to the bearing frame, or the grounding conductor is connected to the grounding device.

[0009] In one embodiment, the grounding conductor comprises the grounding wire of the electrical equipment.

[0010] In one embodiment, when the grounding conductor is connected to the grounding device, the grounding wires with the same function in each electrical equipment are connected, and at least one of the grounding wires with the same function is connected to the grounding device.

[0011] In one embodiment, the grounding wire of the electrical equipment comprises a working grounding wire and a protective grounding wire.

[0012] In one embodiment, the distance between any two grounding poles is at least one time the length of the grounding pole.

[0013] In one embodiment, the grounding resistance of the grounding device is determined by the minimum grounding resistance corresponding to the electrical equipment.

[0014] In one embodiment, the grounding device and the bearing frame are connected by a first wire;

[0015] Each grounding pole is connected by a second wire.

[0016] In one of the embodiments, the carrying device further comprises:

[0017] At least one connecting conductor, the connecting conductor connecting the carrying frame and the grounding conductor respectively.

[0018] In one of the embodiments, the connecting conductor comprises a grounding column, one end of the grounding column connecting the carrying frame, and the other end of the grounding column connecting any of the grounding conductors.

[0019] In one of the embodiments, the connecting conductor comprises a grounding row, the grounding row connecting the carrying frame, and a plurality of wiring holes being provided on the grounding row, any of the grounding conductors being connected to the grounding row through any of the wiring holes.

[0020] In one of the embodiments, the grounding pole is made of conductive material.

[0021] In one of the embodiments, the carrying device is a mobile carrying device.

[0022] In a second aspect, the application further provides a power supply and distribution system, comprising at least one electrical equipment, and the grounding system as described above, wherein the electrical equipment is arranged on the carrying device in the grounding system.

[0023] The grounding system and the power supply and distribution system as described above, the grounding system comprising a carrying device, and a grounding device connected to the carrying frame at at least two points, the carrying frame of the carrying device being used to carry at least one electrical equipment, the grounding device comprising at least three grounding poles, each grounding pole being connected to form a closed loop in turn, wherein the grounding conductor of the electrical equipment is connected to the carrying frame, or the grounding conductor is connected to the grounding device; the application connects the grounding conductor of each electrical equipment to the carrying frame, that is, fully utilizes the natural grounding body, i.e. the carrying frame, as a fault current discharge channel and then connects to the grounding device, or connects the grounding conductor of each electrical equipment to the grounding device, to realize the grounding protection of each electrical equipment, compared with the traditional independent grounding mode, the application does not need to separate various grounds in the electrical equipment independently, thereby reducing the wiring complexity and the cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some of the embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0025] Figure 1 The structural diagram of the grounding system in one of the embodiments;

[0026] Figure 2 Structure diagram of the grounding system in another embodiment;

[0027] Figure 3 Structure diagram of the grounding system in one embodiment in the way of common grounding;

[0028] Figure 4 Structure diagram of the grounding system in one embodiment in the way of independent grounding. DETAILED DESCRIPTION

[0029] For the purpose of promoting the understanding of the present application, the present application will be more fully described by reference to the following drawings. The following drawings represent embodiments of the present application. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It is therefore to be understood that no limitation of the scope of the present application is intended by the description of the embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] It should be understood that the terms "first", "second" and so on as used herein can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of the present application, a first wire can be referred to as a second wire, and similarly, a second wire can be referred to as a first wire. Both the first wire and the second wire are wires, but they are not the same wire.

[0032] It should be understood that "connection" in the following embodiments, if the circuits, modules, units and the like connected to each other have the transmission of electrical signals or data, should be understood as "electrical connection", "communication connection" and the like.

[0033] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It should also be understood that the term "comprising" or "including" or "having" and the like, specifies the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in the specification includes any and all combinations of the related listed items.

[0034] At present, the safety and reliability of the grounding system is crucial, and a good grounding system can ensure the fault-free operation of electrical equipment, greatly reduce downtime, and improve work efficiency. The electrical equipment includes a generator set, a transformer, a switch cabinet, a frequency converter, a motor, and other electrical equipment.

[0035] Grounding is an indispensable safety measure that can reduce the occurrence of electric shock accidents and abnormal accidents of equipment, and is therefore extremely important in the operation of power supply and distribution systems. Currently, the traditional independent grounding method requires grounding protection for each electrical equipment in the power supply and distribution system. However, the traditional independent grounding method for grounding protection has the following problems, but not limited to: ① The various grounds inside the electrical equipment need to be independently separated and separately connected to the grounding device outside the electrical equipment; ② Different grounds are connected through insulators and cables (or other conductive devices, not limited to cables), and the wiring design is complex and the material cost is high, wherein the insulator is used to isolate different conductors to form different electrical circuits; ③ In the traditional independent grounding method, the electrical equipment is not at the same potential, and when a grounding fault occurs, there will be a potential difference between the two different grounds on the electrical equipment, which can easily form a current loop and cause damage to the electrical equipment.

[0036] The grounding system provided by the embodiments of the present application connects the grounding conductors of each electrical equipment to the bearing frame, that is, fully utilizes the natural grounding body, i.e., the bearing frame, as a fault current discharge channel and then connects it to the grounding device, or connects the grounding conductors of each electrical equipment to the grounding device, thereby achieving grounding protection for each electrical equipment. Compared with the traditional independent grounding method, the present application does not need to independently separate various grounds inside the electrical equipment, ensures the safe and reliable operation of the electrical equipment, reduces the complexity of wiring, and thus reduces the cost. Further, when the grounding conductors of each electrical equipment are connected to the bearing frame, if a grounding fault occurs, there will be no potential difference between the two different grounds on the electrical equipment, ensuring the safe and reliable operation of the electrical equipment.

[0037] In one exemplary embodiment, as shown in Figure 1 The grounding system provided by the embodiments of the present application includes:

[0038] The bearing device 110 includes a bearing frame for bearing at least one electrical equipment;

[0039] The grounding device 120 is connected to the bearing frame at least at two points, and the grounding device 120 includes at least three grounding poles, each of which is connected in sequence to form a closed loop.

[0040] The grounding conductors of the electrical equipment are connected to the bearing frame, or the grounding conductors are connected to the grounding device 120.

[0041] The electrical equipment is a power utilization equipment arranged in the power supply and distribution system, and the number and type of the electrical equipment can be set according to actual conditions, which are not limited in the embodiments of the present application; the bearing frame can refer to a steel structure frame for bearing equipment, including a structure composed of bearing beams, auxiliary beams and other section materials, which are not limited in the embodiments of the present application.

[0042] Specifically, the grounding conductor of the electrical equipment is a conductor for grounding, including but not limited to cables, insulated busbars and metal materials; as shown in Figure 1 The grounding conductor of each electrical equipment is connected to the bearing frame of the bearing device 110, and then connected to the grounding device 120 by using a natural grounding body, i.e., the bearing frame itself as a fault current discharge channel; or, as shown in Figure 2 The grounding conductor of each electrical equipment is connected to the grounding device 120, so as to realize grounding protection for each electrical equipment, wherein the connection mode between the grounding conductor and the grounding device 120 is not limited to Figure 2 The grounding conductor in the above figure is connected to the grounding electrode in the grounding device 120, and can also be connected to the connecting conductor between the grounding electrodes, which is not limited in the embodiments of the present application.

[0043] The grounding device 120 includes grounding electrodes buried in the ground and connecting conductors between the grounding electrodes, for realizing the purpose of connecting the electrical equipment to the ground, and at least two points of the grounding device 120 are connected to the bearing frame. It can be understood that each grounding electrode in the grounding device 120 or the connecting conductor between the grounding electrodes can be connected to the bearing frame of the bearing device 110, and the embodiments of the present application do not limit the connection position of the grounding device 120 to the bearing frame, as long as at least two points of the grounding device 120 are connected to the bearing frame. The closed loop formed by the grounding electrodes in the grounding device 120 are connected in sequence, and the grounding electrodes are buried in the soil or a specific conductive medium (such as concrete or coke), and the conductive part in electrical contact with the ground releases the current, thereby realizing grounding protection.

[0044] Exemplarily, the grounding electrode plays a crucial role in the grounding protection as an electrode in full contact with the ground to realize connection with the ground. The embedding depth of the grounding electrode is related to the grounding effect and directly affects the safety of the electrical equipment. Therefore, in general, the embedding depth of the grounding electrode should be below the frozen soil layer to ensure that the grounding electrode can form good contact with the surrounding soil, thereby reducing the grounding resistance of the grounding system and improving the grounding effect. It should be noted that the grounding electrode is a metal object in direct contact with the ground to realize electrical connection. The grounding electrode can be an artificial grounding electrode or a natural grounding electrode, which is not limited in the embodiments of the present application. The artificial grounding electrode refers to a metal conductor or a non-metal conductor buried in the soil or concrete to directly contact the ground and play a role in current dispersion. The artificial grounding electrode is usually specially set for grounding purposes. The natural grounding electrode refers to various metal components that have good contact with the ground but are not specially set for grounding purposes, such as metal well pipes, steel bars in reinforced concrete, buried metal pipelines and facilities, etc.

[0045] It should be noted that the number of grounding electrodes can be set according to actual conditions, Figure 1 and Figure 2 both exemplarily show that three grounding electrodes are connected to form a triangular closed loop. In addition to the triangular arrangement, a square arrangement or a polygonal arrangement can also be used, which is not limited in the embodiments of the present application.

[0046] The above grounding system includes a bearing device and at least two grounding devices connected to the bearing frame. The bearing frame of the bearing device is used to bear at least one electrical equipment. The grounding device includes at least three grounding electrodes, and each grounding electrode is connected in turn to form a closed loop. The grounding conductor of the electrical equipment is connected to the bearing frame, or the grounding conductor is connected to the grounding device. Compared with the traditional independent grounding, the grounding conductors of various grounds of the electrical equipment are independently separated and then connected to the grounding device. The present application fully utilizes the natural grounding body, i.e., the bearing frame, as a fault current discharge channel and then connects it to the grounding device, or connects the grounding conductors of each electrical equipment to the grounding device, thereby realizing grounding protection for each electrical equipment while reducing the materials such as grounding cables and insulators required for grounding, saving materials and costs. In addition, the connection method provided in the embodiments of the present application makes the electrical equipment equipotential. When a grounding fault occurs, there is no potential difference between the two different grounds of the electrical equipment, and no current loop is formed, thereby reducing the maintenance cost and further ensuring the safe and reliable operation of the electrical equipment.

[0047] In one embodiment, the grounding conductor includes a grounding wire of the electrical equipment.

[0048] Specifically, the grounding protection as the most widely used electrical safety measure can refer to that the neutral point of a power system, an electrical device and an exposed conductive part of the electrical device are connected to the ground via a conductor. In the embodiments of the present application, the grounding conductor is taken as an example for illustrating the grounding line of the electrical device. The grounding line of the electrical device is connected to a bearing frame or a grounding device, so as to realize the grounding protection of the electrical device.

[0049] It should be noted that two connection modes are provided in the embodiments of the present application. One is a common grounding mode, that is, the grounding lines of the electrical devices are all connected to the bearing frame, the bearing frame is connected to the grounding device, and then the natural grounding body, i.e., the bearing frame, is used as a fault current discharge channel and connected to the grounding device, so as to realize the grounding protection of the electrical devices. The other is an independent grounding mode, that is, the grounding lines of the electrical devices are all connected to the grounding device, so as to realize the grounding protection of the electrical devices. Different from the traditional independent grounding mode, the common grounding mode or the independent grounding mode provided in the present application can realize the grounding protection of the electrical devices while reducing the grounding cables, insulators and other materials required for grounding, thereby saving materials and costs.

[0050] In the embodiments of the present application, the grounding lines of the electrical devices are connected to the bearing frame or the grounding device, so as to realize the grounding protection of the electrical devices while reducing the costs. Further, in the connection mode provided in the present application, the electrical devices are in an equipotential state. When a grounding fault occurs, there is no potential difference between the two different grounds of the electrical devices, and no current loop is formed, thereby reducing the maintenance costs and further ensuring the safe and reliable operation of the electrical devices.

[0051] In one of the embodiments, when the grounding conductor is connected to the grounding device, the grounding lines with the same function in the electrical devices are connected, and at least one of the grounding lines with the same function is connected to the grounding device.

[0052] Specifically, a plurality of grounding lines can be arranged in a single electrical device, and the functions of the grounding lines are different. The grounding lines can be divided into working grounding lines, protection grounding lines, lightning protection grounding lines and anti-static grounding lines according to their different functions. The functions and the number of the grounding lines of a single electrical device are not limited in the embodiments of the present application, as long as at least one grounding line is arranged in the electrical device. In the case that the grounding conductor is connected to the grounding device, it can be understood that the grounding lines of the electrical device are connected to the grounding device. For example, the working grounding lines in the electrical devices are connected, and the working grounding line of at least one electrical device is connected to the grounding device. It should be noted that the connection mode of the grounding line to the grounding device can be to connect any grounding pole in the grounding device or to connect the connecting wire between the grounding poles in the grounding device, which is not limited in the embodiments of the present application.

[0053] In the embodiments of the present application, the ground wires with the same function are connected, and at least one of the ground wires with the same function is connected to the grounding device, so that the grounding protection for the electrical equipment is realized. Compared with the traditional independent grounding mode, the various grounds in the electrical equipment do not need to be separated independently, the safe and reliable operation of the electrical equipment is ensured, and the cost is saved.

[0054] In one of the embodiments, the ground wires of the electrical equipment include working ground wires and protection ground wires.

[0055] Specifically, the electrical equipment can be provided with two kinds of ground wires, i.e., working ground wires and protection ground wires, which are used to prevent users from being electrocuted and electrical equipment and lines from being damaged; wherein the working ground wires are ground wires connected for ensuring the reliable work of the electrical equipment under normal conditions, and the protection ground wires are ground wires connected for preventing the metal shell of the electrical device, the framework of the power distribution device, and the line tower from being electrified to endanger the safety of the users and the electrical equipment.

[0056] It should be noted that the ground wires can be divided into working ground wires, protection ground wires, lightning protection ground wires, and anti-static ground wires according to their different functions, which are respectively used for working grounding, protection grounding, lightning protection grounding, and anti-static grounding.

[0057] Among them, the working grounding is the grounding for ensuring the reliable work of the electrical equipment under normal conditions, and various working groundings have their respective functions, for example: the neutral point of the transformer and the generator is directly grounded; for example: the neutral point of the voltage transformer primary coil is grounded, and the neutral point is grounded through the arc suppression coil to reduce the grounding fault current, prevent arc reignition, suppress overvoltage, and protect the equipment.

[0058] The protection grounding is the grounding for preventing the metal shell of the electrical device, the framework of the power distribution device, and the line tower from being electrified to endanger the safety of the users and the electrical equipment. The so-called protection grounding is a protection wiring mode in which the metal part (i.e., the metal structure part insulated from the electrified part) of the electrical device that is not electrified under normal conditions but may be electrified after the insulation material is damaged or under other conditions is reliably connected to the grounding body by a wire. Exemplarily, the protection grounding is generally used in the power supply system in which the neutral point of the distribution transformer is not directly grounded (three-phase three-wire system), to ensure that the ground voltage generated when the electrical equipment leaks due to insulation damage does not exceed the safety range.

[0059] Lightning protection grounding is the grounding protection for preventing damage when lightning strikes (direct strike, induction or line introduction). The grounding is set for the needs of lightning protection devices (lightning rod, lightning wire, lightning arrester, etc.). For direct lightning, lightning protection devices (including overvoltage protection grounding devices) promote the neutralization of lightning cloud positive charge and ground induced negative charge to prevent lightning strikes; for static induction lightning, the static charge generated by induction is quickly guided into the ground to avoid the risk of spark discharge or local heating causing flammable or explosive materials to burn and explode.

[0060] When different objects come into contact, due to the difference in the concentration and work function of the surface carriers of the objects, the carriers migrate from one surface to another. At this time, if the surface of one object is positively charged and the surface of another object is negatively charged, static electricity will be generated. Although the energy generated by static electricity is small (generally not more than millijoule level), it can generate a high static voltage, and the spark during discharge can ignite flammable and explosive materials and cause accidents. Therefore, anti-static grounding is used to eliminate static electricity on conductors, which is divided into direct grounding and indirect grounding. Direct grounding is to directly connect the conductor to the ground, and indirect grounding is to connect the conductor to the ground through conductive materials or anti-static materials other than the conductor.

[0061] Exemplarily, the grounding wire of the electrical equipment can also include an anti-static grounding wire; a lightning arrester can also be provided in the grounding system, i.e., a lightning protection device for accepting lightning strikes, including lightning rods, lightning belts (wires), lightning nets, and metal roofs and metal components used as lightning arresters, etc. The function of the lightning arrester is to quickly discharge the lightning to the ground through the down conductor (lightning protection grounding wire) and grounding device of the lightning arrester when the lightning directly hits the lightning arrester, thereby protecting the electrical equipment.

[0062] In order to facilitate the understanding of those skilled in the art, two specific examples are combined below to respectively illustrate the grounding systems corresponding to the two connection modes provided in the embodiments of the present application, as shown in Figure 3 and Figure 4 , Figure 3 exemplarily show the structure of the grounding system in the common grounding mode, Figure 4 exemplarily show the structure of the grounding system in the independent grounding mode.

[0063] As shown in Figure 3 , Figure 4 , taking an example of 3 grounding poles and 12 electrical equipment (referred to as equipment) and mobile equipment as the carrying device.

[0064] As shown in Figure 3As shown, the electrical equipment is provided with a protective grounding wire and a working grounding wire, both of which are connected to the bearing frame of the mobile device through corresponding grounding columns (which can be other forms, and are not limited to the grounding columns proposed here, as long as they can realize the function of connecting the grounding wire to the bearing frame), and the bearing frame is connected to the grounding device through a grounding cable to complete the frame grounding. The three grounding poles in the grounding device are connected in turn to form a closed loop in a triangle, and any two grounding poles in the grounding device are connected to the bearing frame through a grounding cable.

[0065] It can be understood that Figure 3 In the above embodiment, the protective grounding wire and the working grounding wire of each electrical equipment are connected to the bearing frame of the mobile device through corresponding grounding columns, that is, a common grounding mode is adopted and the natural grounding body, i.e., the jack itself, is fully utilized as a fault current discharge channel and then connected to the grounding device to realize the grounding protection of each electrical equipment, while reducing the grounding cables, insulators and other materials required for grounding, saving materials and costs. In addition, under the common grounding mode, the electrical equipment on the bearing frame is at the same potential, and when a grounding fault occurs, there will be no potential difference between the two different grounds on the electrical equipment, and no current loop will be formed, thereby reducing the maintenance cost.

[0066] As shown in the above embodiment, Figure 4 As shown, the electrical equipment is provided with a protective grounding wire and a working grounding wire, wherein the protective grounding wires of the electrical equipment are connected (red line part in Figure 4 , and the protective grounding wire of one of the electrical equipment is connected to the grounding device, the working grounding wires of the electrical equipment are connected (blue line part in Figure 4 , and the working grounding wire of one of the electrical equipment is connected to the grounding device, and at the same time, the bearing frame of the bearing device is connected to the grounding device at two points to complete the frame grounding. The three grounding poles in the grounding device are connected in turn to form a closed loop in a triangle, and any two grounding poles in the grounding device are connected to the bearing frame through a grounding cable.

[0067] It can be understood that Figure 4 In the above embodiment, the protective grounding wires of the electrical equipment are connected to each other and then connected to the grounding device, and the working grounding wires of the electrical equipment are connected to each other and then connected to the grounding device, that is, an independent grounding mode is adopted to realize the grounding protection of each electrical equipment, while reducing the grounding cables, insulators and other materials required for grounding, thereby saving materials and costs.

[0068] In one embodiment, the distance between any two grounding poles is at least one length of the grounding pole.

[0069] Specifically, since the earth is a poor conductor, an electric field with the grounding electrode as the center and gradually decreasing in strength in the surrounding direction is formed near the grounding electrode, when multiple grounding electrodes are close to each other, the dispersion of the grounding current repels each other, which is called shielding effect, which reduces the utilization rate of the grounding device; in order to improve the utilization rate of the grounding device, the distance between any two grounding electrodes is set to be at least one times the length of the grounding electrode, which effectively prevents the mutual influence of the two electric fields and causes poor grounding (the potential is higher than the zero potential of the earth), and improves the grounding effect of the grounding device.

[0070] In the embodiment of the application, the distance between any two grounding electrodes is set to be at least one times the length of the grounding electrode, which effectively prevents the mutual influence of the two electric fields and improves the grounding effect of the grounding device.

[0071] In one of the embodiments, the grounding resistance of the grounding device is determined by the minimum grounding resistance corresponding to the electrical equipment.

[0072] The grounding resistance is the resistance encountered by the current flowing from the grounding device into the earth and then flowing through the earth to another grounding body or spreading far away. The grounding resistance can be used to reflect the good degree of contact between the electrical equipment and the earth and the size of the grounding device.

[0073] Specifically, the grounding wire of the electrical equipment can be used for grounding protection with different functions, such as working grounding, protection grounding, lightning protection grounding, and anti-static grounding. Different functions of grounding protection have different requirements for the size of the grounding resistance. In general, the independent lightning protection grounding resistance should be less than or equal to 10 ohms; the independent safety protection grounding resistance should be less than or equal to 4 ohms; the independent AC working grounding resistance should be less than or equal to 4 ohms; the independent DC working grounding resistance should be less than or equal to 4 ohms; and the anti-static grounding resistance is generally required to be less than or equal to 100 ohms.

[0074] Since the grounding wire of each electrical equipment is directly or indirectly connected to the grounding device, the grounding resistance of the grounding device should be determined by the minimum grounding resistance corresponding to each function of the grounding protection, that is, the minimum grounding resistance corresponding to the electrical equipment. For example, the grounding resistance of the grounding device can be set to be less than or equal to 1 ohm to meet the grounding resistance requirements of each function of the grounding protection.

[0075] It should be noted that the smaller the grounding resistance, the smaller the residual voltage of the electrical equipment, which reduces the damage to the electrical equipment and improves the safety of the electrical equipment.

[0076] Exemplarily, when the grounding electrodes in the grounding device are connected in sequence to form a closed loop (also referred to as a grounding net), the grounding resistance of the grounding device is obtained, and it is determined whether the grounding resistance meets the preset requirement. If yes, it means that the grounding net meets the use requirement of the electrical equipment, and if no, the grounding resistance can be reduced by increasing the number of grounding electrodes. The way of obtaining the grounding resistance of the grounding device can be the existing way, which is not limited in the embodiment of the present application.

[0077] In the embodiment of the present application, the size of the grounding resistance of the grounding device is determined according to the minimum grounding resistance corresponding to the electrical equipment, so as to meet the requirement of the size of the grounding resistance for grounding protection of different functions, facilitate subsequent completion of grounding protection, and ensure safe and reliable operation of the electrical equipment.

[0078] In one of the embodiments, the grounding electrode is made of conductive material.

[0079] The conductive material can be metal or non-metal material capable of conducting electricity, which is not limited in the embodiment of the present application.

[0080] Specifically, the material of the grounding electrode includes but is not limited to copper bar, angle steel or round steel, as long as the conductive material can release the current to the ground.

[0081] In one of the embodiments, the grounding device is connected to the bearing frame through the first wire.

[0082] The grounding electrodes are connected through the second wire.

[0083] The material of the first wire and the second wire can be set according to the actual situation, as long as the first wire can provide a conductive path between the bearing frame and the grounding device, and the second wire can provide a conductive path between the grounding electrodes. In the embodiment of the present application, the first wire and the second wire are both taken as grounding cables as an example for description.

[0084] Specifically, the grounding electrodes are connected through the grounding cables, and any two grounding electrodes are connected to the bearing frame (frame grounding) through the grounding cables.

[0085] Exemplarily, the grounding electrodes can also be connected by conductive copper or flat steel metal conductor, so as to form a closed loop.

[0086] In the embodiment of the present application, the grounding device is connected to the bearing frame through the first wire to release the subsequent current, and the grounding electrodes are connected through the second wire to form a grounding net to complete the grounding protection.

[0087] In one of the embodiments, the bearing device further comprises:

[0088] At least one connecting conductor, the connecting conductor connecting the carrying frame and the grounding conductor respectively.

[0089] The number and form of the connecting conductor can be set according to actual conditions, which are not limited in the embodiments of the present application. For example, the connecting conductor can be in the form of a row, a plate, a column or a buckle, as long as the connecting conductor can provide a conductive path between the carrying frame and the grounding conductor.

[0090] Specifically, the carrying device is provided with a connecting conductor, which is used to connect the carrying frame and the grounding conductor of the electrical equipment.

[0091] In the embodiments of the present application, the connection between the carrying frame and the grounding conductor is realized by the connecting conductor, and then the natural grounding body, i.e., the carrying frame, is utilized as a fault current discharge channel and connected to the grounding device, thereby realizing the grounding protection of the electrical equipment and ensuring the safe and reliable operation of the electrical equipment.

[0092] In one of the embodiments, the connecting conductor includes a grounding column, one end of the grounding column being connected to the carrying frame and the other end of the grounding column being connected to any grounding conductor.

[0093] The number of the grounding column can be set according to actual conditions, which is not limited in the embodiments of the present application.

[0094] Specifically, at least one grounding column is welded on the carrying frame, and one grounding column is used to press a grounding wire, i.e., any grounding wire is connected to the carrying frame through any grounding column, and the natural grounding body, i.e., the carrying frame, is utilized as a fault current discharge channel.

[0095] For example, as shown in Figure 3 , a plurality of grounding columns are welded on the carrying frame, and any grounding wire of the electrical equipment is connected to the carrying frame through a corresponding grounding column, thereby realizing the grounding protection.

[0096] In one of the embodiments, the connecting conductor includes a grounding row, the grounding row being connected to the carrying frame, and the grounding row being provided with a plurality of wiring holes, any grounding conductor being connected to the grounding row through any wiring hole.

[0097] The number of the grounding row can be set according to actual conditions, which is not limited in the embodiments of the present application.

[0098] Specifically, the grounding row is provided with a plurality of wiring holes, a single wiring hole being able to press a single grounding wire, and any grounding wire being connected to the carrying frame through a grounding hole on a corresponding grounding row, and the natural grounding body, i.e., the carrying frame, is utilized as a fault current discharge channel.

[0099] In one of the embodiments, the carrying device is a mobile carrying device.

[0100] Specifically, the mobile bearing device can be a mobile device or a skid-mounted device configured with a transportation device, wherein the mobile device or the skid-mounted device refers to a structural type of product, the mobile refers to a semi-trailer or a vehicle-mounted type, the device itself is provided with a transportation device such as a tire and the like, and the device can be transported under the traction of a vehicle head, and the skid-mounted device refers to a device without the transportation device at the bottom, which needs to be placed on a special transportation tool during transportation.

[0101] It should be noted that when the power supply and distribution system is used for operation, the electrical equipment in the power supply and distribution system will be transferred to the next operation area after completing the operation in the area, and the frequency of relocation is high. The electrical equipment is carried on the mobile bearing device, which facilitates the relocation of the electrical equipment. The grounding device can be constructed after the mobile bearing device moves to the specified position, which is simple and reliable, and reduces the construction cost.

[0102] Exemplarily, the electrical equipment can be integrated and installed on the bearing frame of the mobile bearing device, which facilitates movement.

[0103] In the embodiment of the application, the bearing frame of the mobile bearing device is used to bear the electrical equipment, which facilitates the transfer of the electrical equipment from one operation area to the next operation area, and reduces the construction cost.

[0104] In one exemplary embodiment, the application also provides a power supply and distribution system, comprising at least one electrical equipment and a grounding system as described above, wherein the electrical equipment is arranged on the bearing device in the grounding system.

[0105] Specifically, the power supply and distribution system is used for power operation, and by being provided with the grounding system, the grounding protection of the electrical equipment in the power supply and distribution system is realized.

[0106] In the description of the specification, the description of the terms "some embodiments", "other embodiments", "ideal embodiments" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0107] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the specification.

[0108] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A grounding system, characterized by, The application relates to a grounding system for at least one electrical equipment, comprising: a bearing device comprising a bearing frame for bearing the at least one electrical equipment; at least two grounding devices connected to the bearing frame, the grounding devices comprising at least three grounding poles, each of the grounding poles being connected in sequence to form a closed loop; wherein a grounding conductor of the electrical equipment is connected to the bearing frame, or the grounding conductor is connected to the grounding devices.

2. The grounding system of claim 1, wherein, The grounding conductor comprises a grounding wire of the electrical equipment.

3. The grounding system of claim 2, wherein, When the grounding conductor is connected to the grounding devices, grounding wires with the same function in each of the electrical equipment are connected, and at least one of the grounding wires with the same function is connected to the grounding devices.

4. The grounding system according to claim 2 or 3, characterized in that The grounding wire of the electrical equipment comprises a working grounding wire and a protective grounding wire.

5. The grounding system of claim 1, wherein, The distance between any two of the grounding poles is at least one time the length of the grounding poles.

6. The grounding system of claim 1, wherein, The grounding resistance of the grounding devices is determined by the minimum grounding resistance corresponding to the electrical equipment.

7. The grounding system of claim 1, wherein, The grounding devices are connected to the bearing frame through first conductors; each of the grounding poles is connected through second conductors.

8. The grounding system of claim 1, wherein, The bearing device further comprises: at least one connecting conductor, the connecting conductor being connected to the bearing frame and the grounding conductor respectively.

9. The grounding system of claim 8, wherein, The connecting conductor comprises a grounding column, one end of the grounding column being connected to the bearing frame, and the other end of the grounding column being connected to any of the grounding conductors.

10. The grounding system of claim 8, wherein, The connecting conductor comprises a grounding row, the grounding row being connected to the bearing frame, and a plurality of wiring holes being arranged on the grounding row, any of the grounding conductors being connected to the grounding row through any of the wiring holes.

11. The grounding system of claim 1, wherein, The grounding poles are made of conductive material.

12. The grounding system of claim 1, wherein, The bearing device is a mobile bearing device.

13. A power distribution system, characterized by The application further relates to an electrical equipment comprising at least one electrical equipment, and the grounding system as claimed in any one of claims 1 to 12, wherein the electrical equipment is arranged on the bearing device in the grounding system.

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