A new energy box-type substation with a protection unit

Abstract

This invention discloses a new energy prefabricated substation with a protection unit for use in substations. By installing a protection unit inside the insulating base, the insulation performance of the insulating base can be actively monitored, solving the problem in existing technologies where it is difficult to detect the deterioration of the insulating base's performance in a timely manner, leading to significant safety hazards. With the installation of heat transfer columns and their internal re-grounding units, when the insulating base has good insulation performance, heat can be conducted downwards, reducing the accumulation of heat on the insulating base and effectively slowing down the rate of insulation performance degradation. At the same time, the insulation performance of the insulating base can be effectively monitored. When its insulation deteriorates and its relative leakage current is high, the selective conductive pin can be connected to conduct this portion of the current directly to the ground, re-grounding the substation and effectively preventing excessive current accumulation inside the insulating base, thereby significantly reducing safety hazards.

Description

Technical Field

[0001] This invention relates to the field of substations, and in particular to a new energy prefabricated substation with a protection unit. Background Technology

[0002] A substation is a location in a power system that transforms voltage and current, receives electrical energy, and distributes it. A prefabricated substation is a typical example of a substation. It is a factory-prefabricated, compact indoor / outdoor power distribution device that integrates high-voltage switchgear, distribution transformers, and low-voltage distribution equipment according to a specific wiring scheme. It organically combines the functions of transformer voltage reduction and low-voltage power distribution, all housed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, theft-proof, heat-insulated, fully enclosed, and movable steel structure box. It is particularly suitable for urban power grid construction and renovation, and represents a new type of substation that has emerged after traditional civil engineering substations.

[0003] The protective structure of a substation is generally divided into physical protection and leakage protection. Physical protection is mainly concentrated on the outer shell, while leakage protection is generally achieved by setting a grounding wire and cooperating with an insulating base installed at the bottom of the box-type substation. For example, a box-type substation disclosed in Chinese patent CN213879049U and a box-type substation with an insulating protection device disclosed in Chinese patent CN212343109U are examples.

[0004] However, the aforementioned patents' technical means for insulation protection tend to be passive. When the insulation base deteriorates due to overheating, aging, cracking, or other reasons, it is often difficult to detect in time, which can easily lead to leakage. Moreover, the leakage is only discovered when it causes significant consequences, posing a considerable safety hazard. Summary of the Invention

[0005] The core of this invention lies in the ability to actively monitor the insulation performance of the insulating base by installing a protective unit within it. This addresses the problem in existing technologies where performance degradation of the insulating base is difficult to detect in a timely manner, leading to significant safety hazards. Simultaneously, it can conduct heat outwards when the insulating base is functioning normally, reducing heat accumulation on the base. In the event of an anomaly, it re-grounds the substation, thereby mitigating safety risks.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A new energy box-type substation with a protective unit includes a substation body, an insulating base fixedly connected to the lower end of the substation body, a grounding wire connected to the substation body, the insulating base including a lower protective layer in contact with the ground and an upper protective layer fixedly connected to the upper end of the lower protective layer, the bottom of the substation body being fixedly connected to the upper protective layer, and a protective unit being provided on the upper protective layer.

[0008] The upper protective layer includes a main insulation layer and a lower insulation layer fixedly connected between the main insulation layer and the lower protective layer. The protective unit includes a metal sheet fixedly embedded inside the lower insulation layer, an LED light strip installed outside the lower insulation layer, and two wires connected in series between the circuit containing the metal sheet and the LED light strip. An initial warning unit is also installed on the upper protective layer. A protective cover is fixedly embedded in one edge of the lower insulation layer. The initial warning unit includes a leakage current detection chip installed inside the protective cover and an alarm installed at the top of the upper protective layer. The leakage current detection chip is signal-connected to the alarm and electrically connected to the metal sheet. Both wires are located inside the protective cover, and the protective cover is offset from the bottom of the substation body.

[0009] Furthermore, both the lower and upper protective layers are made of rigid insulating materials, and the bottom area of ​​the substation body, the upper protective layer, and the lower protective layer gradually increases.

[0010] Furthermore, the metal sheet is made of conductive metal material, and the length and width of the metal sheet are not less than the length and width of the bottom of the substation body, respectively.

[0011] Optionally, the protective unit also includes multiple heat transfer columns that are uniformly fixed to the lower end of the metal sheet. The ends of the multiple heat transfer columns are fixedly inserted through the lower protective layer and extend into the ground. Some heat transfer columns are equipped with re-grounding units. The heat transfer columns are made of thermally conductive and non-conductive materials.

[0012] Furthermore, the heat transfer column with the re-grounding unit includes an outer heat-conducting layer and an inner heat-insulating layer fixedly embedded inside the outer heat-conducting layer. One end of the re-grounding unit is fixedly connected to a metal sheet, and the other end of the re-grounding unit penetrates the outer heat-conducting layer and extends to the bottom of the outer heat-conducting layer.

[0013] Furthermore, the re-grounding unit includes a lower guiding electrode fixedly connected to a metal sheet, a grounding conductive electrode fixedly embedded in the inner heat insulation layer, and a selective conductive electrode connected between the two. The lower guiding electrode and the grounding conductive electrode do not contact each other. The ends of the lower guiding electrode and the grounding conductive electrode that are close to each other are drilled with cylindrical blind holes. The two ends of the selective conductive electrode extend into the two cylindrical blind holes respectively. An electromagnetic plate is also installed at the top of the upper cylindrical blind hole.

[0014] Furthermore, the conductive needle includes a conductive segment and an insulating segment fixedly connected to the upper end of the conductive segment. The insulating segment is made of insulating material, and an iron core is fixedly embedded inside the insulating segment. The conductive segment, the lower guide needle, and the grounding conductive needle are all made of conductive material.

[0015] Furthermore, when the conductive segment contacts the bottom of the lower cylindrical blind hole, the upper end of the conductive segment is located below the lower guide needle, and the upper end of the insulating segment is located inside the upper cylindrical blind hole; when the insulating segment contacts the top of the upper cylindrical blind hole, the upper end of the conductive segment extends into the upper cylindrical blind hole.

[0016] Compared with the prior art, the advantages of this invention are:

[0017] (1) This solution can actively monitor the insulation performance of the insulating base by setting a protective unit inside the insulating base, so as to solve the problem that it is difficult to detect the degradation of the insulating base performance in time in the prior art, which leads to a large safety hazard.

[0018] (2) With the heat transfer column and its internal grounding unit set up, when the insulation performance of the insulating base is good, heat can be conducted downwards to reduce the accumulation of heat on the insulating base, thereby effectively reducing the decay rate of the insulation performance of the insulating base. At the same time, the insulation performance of the insulating base can be effectively monitored. When its insulation deteriorates and its relative leakage current is large, the conductive pin can be connected to realize the direct conduction of this part of the current to the ground, so that the substation is grounded again, effectively avoiding the accumulation of excessive current in the insulating base, thereby greatly reducing safety hazards. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a schematic diagram of the bottom of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of the insulating base of the present invention;

[0023] Figure 5 for Figure 4 A schematic diagram at point A in the middle;

[0024] Figure 6 This is a schematic diagram of the cross-section of the heat transfer column with a re-grounding unit in this invention;

[0025] Figure 7 This is a schematic diagram of the middle portion of the re-grounding unit of the present invention when it is not grounded;

[0026] Figure 8 This is a schematic diagram of the middle part of the re-grounding unit of the present invention when it is grounded.

[0027] Explanation of the labels in the diagram:

[0028] 1. Substation body, 2. Grounding wire, 31. Upper protective layer, 32. Lower protective layer, 311. Main insulation layer, 312. Lower insulation layer, 4. LED light strip, 51. Metal sheet, 52. Wire, 53. Protective cover, 501. Leakage current detection chip, 6. Heat transfer column, 61. Outer heat conduction layer, 62. Inner heat insulation layer, 71. Lower guide needle, 72. Grounding conductive needle, 731. Conductive section, 732. Insulating section, 701. Electromagnetic sheet, 702. Cylindrical blind hole. Detailed Implementation

[0029] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0030] First implementation method:

[0031] Figure 1-2 As shown, a new energy box-type substation with a protective unit includes a substation body 1, an insulating base fixedly connected to the lower end of the substation body 1, a grounding wire 2 connected to the substation body 1, the insulating base includes a lower protective layer 32 in contact with the ground and an upper protective layer 31 fixedly connected to the upper end of the lower protective layer 32, the bottom of the substation body 1 is fixedly connected to the upper protective layer 31, and a protective unit is provided on the upper protective layer 31.

[0032] like Figures 3-5 The upper protective layer 31 includes a main insulating layer 311 and a lower insulating layer 312 fixedly connected between the main insulating layer 311 and the lower protective layer 32. The protective unit includes a metal sheet 51 fixedly embedded inside the lower insulating layer 312, an LED light strip 4 installed outside the lower insulating layer 312, and two wires 52 connected in series between the metal sheet 51 and the circuit where the LED light strip 4 is located. The metal sheet 51 is preferably a copper sheet. When the insulation performance of the insulating base deteriorates and leakage occurs, the current leaking into the insulating base is captured by the metal sheet 51, thereby turning on the circuit where the LED light strip 4 is located and lighting it up. This alerts the staff to the abnormality of the insulating base, facilitating timely maintenance and intervention and reducing safety hazards.

[0033] A protective cover 53 is fixedly embedded in one edge of the lower insulation layer 312. Both wires 52 are located inside the protective cover 53. The protective cover 53 effectively protects the two wires 52 inside, making the connection points of the wires 52 with the metal sheet 51 and with the LED light strip 4 less susceptible to external pressure. This effectively reduces the probability of accidental disconnection of the connection points, allowing the protection unit to stably monitor the insulation performance of the insulation base. The protective cover 53 is offset from the bottom of the substation body 1, making the protective cover 53 and the wires 52 inside less susceptible to the influence of the gravity of the substation body 1, further improving the protection effect on the connection points of the wires 52 with the metal sheet 51 and with the LED light strip 4.

[0034] Both the lower protective layer 32 and the upper protective layer 31 are made of rigid insulating material, and the bottom area of ​​the substation body 1, the upper protective layer 31 and the lower protective layer 32 gradually increases, effectively increasing the effective range of the insulating base and increasing the insulation effect.

[0035] The metal sheet 51 is made of conductive metal material, and the length and width of the metal sheet 51 are not less than the length and width of the bottom of the substation body 1, respectively. When the insulation performance of the insulating base decreases, some current enters its interior, making the metal sheet 51 have a larger capture range for this part of the current leaking into the insulating base, thereby effectively ensuring the active monitoring effect of this protection unit on the attenuation of the insulation performance of the insulating base and reducing safety hazards.

[0036] This solution, by setting a protective unit inside the insulating base, can actively monitor the insulation performance of the insulating base, thus solving the problem in the prior art that it is difficult to detect the deterioration of the insulating base performance in a timely manner, resulting in significant safety hazards. In addition, in this embodiment, only the LED light strip 4, the metal sheet 51, and the wire 52 are needed to actively monitor the performance degradation of the insulating base, without involving additional sensors, power monitoring instruments, etc., making the overall cost lower.

[0037] Second implementation method:

[0038] This embodiment adds an initial warning unit or replaces the LED light strip 4, metal sheet 51 and wire 52 with an initial warning unit, based on the first embodiment. The rest remains the same as the first embodiment.

[0039] like Figures 4-5 An initial warning unit is also installed on the upper protective layer 31. The initial warning unit includes a leakage current detection chip 501 installed inside the protective cover 53 and an alarm installed on the upper end of the upper protective layer 31. The leakage current detection chip 501 is connected to the alarm signal and electrically connected to the metal sheet 51. In the early stage of insulation base performance degradation, the leakage current of the substation body 1 is relatively weak, so the current captured by the metal sheet 51 is limited and insufficient to light up the LED light strip 4. Based on this problem, the initial warning unit is set up, and the leakage current detection chip 501 inside can effectively monitor the leakage current. The system measures the weak current data captured on the metal sheet 51. When the current data exceeds the preset threshold, the alarm is triggered, achieving an early warning effect in the early stage of current leakage. If the initial warning is not addressed, or if the leakage develops rapidly before the staff has time to handle it, the current captured on the metal sheet 51 gradually increases, triggering the LED strip 4 to light up. On the one hand, this effectively expands the warning range; on the other hand, it reminds the staff that the leakage at the insulating base is of a high degree of urgency, making it easier to prompt the staff to take appropriate maintenance and intervention measures.

[0040] Compared to the first implementation method, this implementation method provides an earlier warning time for abnormalities in the insulating base, resulting in a better elimination of safety hazards caused by leakage.

[0041] It is worth noting that, in order to control costs, in this embodiment, the initial warning unit can be directly used to replace the LED light strip 4, the metal sheet 51 and the wire 52. In specific implementation, selective settings can be made according to actual needs.

[0042] The third implementation method:

[0043] This embodiment adds a heat transfer column 6 and a re-grounding unit to the first embodiment, while the rest remains the same as the first embodiment.

[0044] like Figure 4 and Figure 6 The protection unit also includes multiple heat transfer columns 6 that are uniformly fixedly connected to the lower end of the metal sheet 51. The ends of the multiple heat transfer columns 6 are fixedly inserted through the lower protective layer 32 and extend into the ground. Some heat transfer columns 6 are equipped with re-grounding units. The heat transfer columns 6 are made of thermally conductive and non-conductive materials. During operation, the insulating base will absorb some of the heat generated on the substation body 1, resulting in heat accumulation. Excessive heat accumulation can easily accelerate the aging of the insulating base and cause the insulation performance to deteriorate faster. Since the metal sheet 51 is made of metal, it is easier to absorb heat. At this time, for some heat transfer columns 6 that are not equipped with re-grounding units, their function is to quickly conduct the heat accumulated on the metal sheet 51 from the insulating base or the substation body 1 into the ground, thereby effectively reducing the amount of heat accumulation, reducing the working temperature of the insulating base, and slowing down the rate of insulation performance deterioration.

[0045] The heat transfer column 6 with a re-grounding unit includes an outer heat-conducting layer 61 and an inner heat-insulating layer 62 fixedly embedded inside the outer heat-conducting layer 61. One end of the re-grounding unit is fixedly connected to the metal sheet 51, and the other end of the re-grounding unit passes through the outer heat-conducting layer 61 and extends to the bottom of the outer heat-conducting layer 61. Under normal circumstances, this part of the heat transfer column 6 with the re-grounding unit also serves as a heat conduction, transferring heat to the ground. After the insulation performance of the insulating base has weakened considerably, a large current is captured on the metal sheet 51. This current is sufficient to light up the LED strip 4 and also sufficient to generate a magnetic force in the electromagnetic sheet 701 that can attract the selective conductive needle. This allows the path of the lower conductive needle 71, the selective conductive needle, and the grounding conductive needle 72 to be connected, so that the leaked current can be grounded again and conducted into the ground. This effectively ensures safety after the insulating base malfunctions and significantly reduces the safety hazards to the substation body 1 and surrounding personnel.

[0046] like Figure 7The grounding unit includes a lower guiding needle 71 fixedly connected to a metal sheet 51, a grounding conductive needle 72 fixedly embedded in the inner heat insulation layer 62, and a selective conductive needle connected between the two. The lower guiding needle 71 and the grounding conductive needle 72 do not contact each other. The ends of the lower guiding needle 71 and the grounding conductive needle 72 that are close to each other are drilled with cylindrical blind holes 702. The two ends of the selective conductive needle extend into the two cylindrical blind holes 702 respectively. An electromagnetic plate 701 is also installed at the top of the upper cylindrical blind hole 702. The selective conductive needle includes a conductive section 731 and an insulating section 732 fixedly connected to the upper end of the conductive section 731. The insulating section 732 is made of insulating material, and an iron core is fixedly embedded inside the insulating section 732. The conductive section 731, the lower guiding needle 71, and the grounding conductive needle 72 are all made of conductive material.

[0047] like Figure 7 When the conductive segment 731 contacts the bottom of the lower cylindrical blind hole 702, the upper end of the conductive segment 731 is located below the lower guide needle 71. At this time, the insulating segment 732 contacts the lower guide needle 71, making it difficult for the current captured by the metal sheet 51 to be conducted to the ground. This facilitates accurate monitoring of leakage current by the leakage current detection chip 501 or the LED light strip 4. Furthermore, the upper end of the insulating segment 732 is located inside the upper cylindrical blind hole 702, allowing the conductive needle to smoothly approach the electromagnetic sheet 701 after being subjected to magnetic force. When the insulating segment... When 732 contacts the top of the upper cylindrical blind hole 702, the upper end of the conductive section 731 extends into the upper cylindrical blind hole 702. After the leakage current is relatively large, the magnetic force generated by the electromagnetic plate 701 is sufficient to attract the selective conductive needle, causing the conductive section 731 to move upward and contact the lower guide needle 71, thereby making the grounding unit conductive. The current leaked into the insulating base due to the abnormality can be conducted to the ground, making it difficult for current to accumulate at the insulating base, so that the staff are less likely to have the safety hazard of electric shock during maintenance.

[0048] It is worth noting that, in practice, technicians can adjust the weight of the conductive needle according to the safe current threshold when leakage occurs, so that the conductive needle can be attracted when the leakage current exceeds the safe threshold, thereby making the grounding unit conductive.

[0049] By setting up the heat transfer column 6 and its internal re-grounding unit, heat can be conducted downwards when the insulation performance of the insulating base is good, reducing the accumulation of heat on the insulating base and thus effectively reducing the decay rate of the insulation performance of the insulating base. At the same time, the insulation performance of the insulating base can be effectively monitored. When its insulation deteriorates and its relative leakage current is large, the selective conductive pin can be connected to conduct this part of the current directly to the ground, so that the substation is re-grounded, effectively avoiding excessive current accumulation in the insulating base and thus greatly reducing safety hazards.

[0050] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A new energy box-type substation with a protection unit, comprising a substation body (1), wherein an insulating base is fixedly connected to the lower end of the substation body (1), and a grounding wire (2) is also connected to the substation body (1), characterized in that: The insulating base includes a lower protective layer (32) in contact with the ground and an upper protective layer (31) fixedly connected to the upper end of the lower protective layer (32). The bottom of the substation body (1) is fixedly connected to the upper protective layer (31), and a protective unit is provided on the upper protective layer (31). The upper protective layer (31) includes a main insulating layer (311) and a lower insulating layer (312) fixedly connected between the main insulating layer (311) and the lower protective layer (32). The protective unit includes a metal sheet (51) fixedly embedded inside the lower insulating layer (312), an LED light strip (4) installed outside the lower insulating layer (312), and two wires (52) connected in series between the metal sheet (51) and the circuit containing the LED light strip (4). An initial warning unit is also installed on the upper protective layer (31). A protective cover (53) is fixedly embedded in one edge of the lower insulating layer (312). The initial warning unit includes a leakage current detection chip (501) installed in the protective cover (53) and an alarm installed on the upper end of the upper protective layer (31). The leakage current detection chip (501) is connected to the alarm signal. The leakage current detection chip (501) is electrically connected to the metal sheet (51). Both wires (52) are located inside the protective cover (53). The protective cover (53) is misaligned with the bottom of the substation body (1). The protective unit also includes multiple heat transfer columns (6) uniformly fixedly connected to the lower end of the metal sheet (51). Some of the heat transfer columns (6) are provided with re-grounding units. The heat transfer column (6) with the re-grounding unit includes an outer heat-conducting layer (61) and an inner heat insulation layer (62) fixedly embedded inside the outer heat-conducting layer (61). The re-grounding unit includes a lower guiding electric needle (71) fixedly connected to the metal sheet (51), a grounding conductive needle (72) fixedly embedded in the inner heat insulation layer (62), and a connection between the two. The selective conductive needle is provided, and the lower guide needle (71) and the ground conductive needle (72) do not contact each other. The lower guide needle (71) and the ground conductive needle (72) are both drilled with cylindrical blind holes (702) at their close ends. The two ends of the selective conductive needle extend into the two cylindrical blind holes (702) respectively. An electromagnetic plate (701) is also installed at the top of the upper cylindrical blind hole (702). The selective conductive needle includes a conductive section (731) and an insulating section (732) fixedly connected to the upper end of the conductive section (731).

2. A new energy prefabricated substation with a protection unit according to claim 1, characterized in that: The lower protective layer (32) and the upper protective layer (31) are both made of rigid insulating material, and the bottom area of ​​the substation body (1), the upper protective layer (31) and the lower protective layer (32) gradually increases.

3. A new energy prefabricated substation with a protection unit according to claim 1, characterized in that: The metal sheet (51) is made of conductive metal material, and the length and width of the metal sheet (51) are not less than the length and width of the bottom of the substation body (1).

4. A new energy prefabricated substation with a protection unit according to claim 1, characterized in that: The ends of the plurality of heat transfer columns (6) are fixedly inserted through the lower protective layer (32) and extend into the ground. The heat transfer columns (6) are made of a thermally conductive and non-conductive material.

5. A new energy prefabricated substation with a protection unit according to claim 4, characterized in that: One end of the re-grounding unit is fixedly connected to the metal sheet (51), and the other end of the re-grounding unit penetrates the outer heat-conducting layer (61) and extends to the bottom of the outer heat-conducting layer (61).

6. A new energy prefabricated substation with a protection unit according to claim 1, characterized in that: The insulating section (732) is made of insulating material and an iron core is fixedly embedded inside the insulating section (732). The conductive section (731), the lower guide needle (71) and the grounding conductive needle (72) are all made of conductive material.

7. A new energy prefabricated substation with a protection unit according to claim 6, characterized in that: When the conductive segment (731) contacts the bottom of the lower cylindrical blind hole (702), the upper end of the conductive segment (731) is located below the lower guide needle (71), and the upper end of the insulating segment (732) is located inside the upper cylindrical blind hole (702); when the insulating segment (732) contacts the top of the upper cylindrical blind hole (702), the upper end of the conductive segment (731) extends into the upper cylindrical blind hole (702).

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