A substation with the function of detecting abnormal heating

Abstract

The present invention provides a substation with a function of detecting abnormal heating. The substation is provided with several electrical cabinets, the electrical cabinets including an insulating plate, a control module, a conductive part, a movable part, a medium storage box, a magnet, and a piston; the conductive part includes a first contact, and the movable part includes a second contact; when abnormal heating occurs in the electrical cabinet, the pressure in the medium storage box is greater than the pressure in the electrical cabinet, and the piston moves upward in a vertical direction under the action of the internal pressure of the medium storage box, driving the magnet to move and then the movable part to move and abut against the conductive part, thereby providing a conduction signal to the control module. After receiving the conduction signal, the control module issues an alarm indicating abnormal heating. The present application detects changes in the pressure of the gas in the electrical cabinet in the substation to determine whether abnormal heating occurs, which can reduce the use of sensors and avoid inaccurate detection due to incorrect sensor placement, thus having excellent practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a transformer substation with a function of detecting abnormal heating. Background Art

[0002] Sulfur hexafluoride (SF6) has excellent electrical insulation and arc-extinguishing properties. Its dielectric strength is 2.5 times that of nitrogen at the same pressure, its breakdown voltage is 2.5 times that of air, and its arc-extinguishing capability is 100 times that of air. It is a new generation of ultra-high voltage insulating dielectric material, superior to both air and oil. The electrical industry utilizes its high dielectric strength and excellent arc-extinguishing properties for widespread use as an insulating material for high-voltage switches, large-capacity transformers, high-voltage cables, and gas.

[0003] To prevent sulfur hexafluoride leakage and contamination of electrical components within electrical cabinets, they are typically sealed. However, abnormal heating is common in substation environments. Installing multiple temperature sensors within a cabinet to monitor the entire cabinet's temperature would undoubtedly increase production costs. Reducing the number of temperature sensors would result in incomplete detection and the potential for missed detections. Consequently, existing solutions for detecting abnormal heating in substations are not cost-effective or practical. Summary of the Invention

[0004] Based on this, in order to solve the problem that the existing solutions for detecting abnormal heating in substations are not economical and applicable, the present invention provides a substation with the function of detecting abnormal heating, and its specific technical solution is as follows:

[0005] A substation with a function of detecting abnormal heating, wherein a plurality of electrical cabinets are provided in the substation, and the electrical cabinets include:

[0006] an insulating plate fixedly connected to the outer surface of the housing of the electrical cabinet;

[0007] The control module, the conductive part and the movable part are all arranged on the insulating plate;

[0008] The medium storage box, the magnet and the piston are all arranged in the electrical cabinet;

[0009] The medium storage box has an upward opening, the piston is sealed and connected to the medium storage box and slides in a vertical direction, the medium storage box is filled with a preset volume of medium, the magnet is provided on the upper surface of the piston, the movable member is magnetically connected to the magnet, and the conductive member and the movable member are respectively connected to the control module via wires;

[0010] When the electrical cabinet is abnormally heated, the movable part magnetically connected to the magnet abuts against the conductive part and forms a conduction signal. After the control module obtains the conduction signal, it issues an alarm of abnormal heating. When the electrical cabinet is normal, the movable part magnetically connected to the magnet is disconnected from the conductive part.

[0011] The substation with the function of detecting abnormal heating can detect the pressure change of the gas in the electrical cabinet in the substation to know whether there is abnormal heating, which can reduce the use of sensors and avoid inaccurate detection due to incorrect sensor setting position, and has good practicality.

[0012] Furthermore, the magnet is fixedly connected to the piston.

[0013] Furthermore, the electrical cabinet is also provided with:

[0014] A heat dissipation device is signal-connected to the heat dissipation device.

[0015] Furthermore, the heat dissipation device has a plurality of successively increasing gears.

[0016] Furthermore, the control module controls the heat dissipation device to adjust the gear position according to the comparison between the duration of the conduction signal and a preset time threshold, until the conductive member is disconnected from the movable member.

[0017] Furthermore, the heat dissipation device includes a cooling fan and a supporting arc plate, the cooling fan is arranged on the supporting arc plate, the supporting arc plate is provided with air guide holes adapted to the cooling fan, the supporting arc plate is fixedly connected to the top of the shell of the electrical cabinet, and the supporting arc plate and the shell of the electrical cabinet form an air duct.

[0018] Furthermore, a plurality of heat dissipation fins are provided on the top of the shell of the electrical cabinet, and the heat dissipation fins are located in the air duct.

[0019] Furthermore, the heat dissipation device also includes an adjustment plate, which includes a first hinged plate, a flexible connecting plate and a second hinged plate connected in sequence, the first hinged plate and the second hinged plate are respectively hinged to the top of the shell of the electrical cabinet, and the flexible connecting tube is provided with a clearance position adapted to the heat dissipation fins.

[0020] Furthermore, a plurality of heat sinks are provided on the supporting arc plate and the adjusting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but rather the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0022] Figure 1 This is a structural diagram of a power distribution cabinet of a substation with a function of detecting abnormal heating in one embodiment of the present invention;

[0023] Figure 2 This is a partial structural diagram of a power distribution cabinet of a substation with a function of detecting abnormal heating in one embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of a heat dissipation device for a substation with a function of detecting abnormal heating in one embodiment of the present invention;

[0025] Figure 4 This is a structural diagram of a heat dissipation device of a substation with a function of detecting abnormal heating in one embodiment of the present invention after the gear is adjusted up.

[0026] Description of reference numerals:

[0027] 1. Electrical cabinet; 2. Insulation board; 3. Conductive parts; 4. Moving parts; 5. Medium storage box; 6. Magnet; 7. Piston; 8. Support arc plate; 9. Cooling fan; 10. Adjustment board; 11. Cooling fins; 12. Control module. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0032] like Figure 1-4 As shown, a substation with a function for detecting abnormal heating according to one embodiment of the present invention is provided within the substation. The substation comprises several electrical cabinets 1, each comprising an insulating plate 2, a control module 12, a conductive member 3, a movable member 4, a medium storage box 5, a magnet 6, and a piston 7. The control module 12, the conductive member 3, and the movable member 4 are all mounted on the insulating plate 2, which is fixedly attached to the outer surface of the housing of the electrical cabinet 1. The conductive member 3 and the movable member 4 are each connected to the control module 12 via wires. The medium storage box 5, the magnet 6, and the piston 7 are all mounted within the electrical cabinet 1 corresponding to the insulating plate 2. The medium storage box 5 is open upward, and the piston 7 is sealed and vertically slidable within the medium storage box 5. The medium storage box 5 is filled with a predetermined volume of medium. The magnet 6 is mounted on the upper surface of the piston 7, and the movable member 4 is magnetically connected to the magnet 6. In other words, when the magnet 6 moves up and down, the movable member moves up and down accordingly under the magnetic force of the magnet 6.

[0033] When the electrical cabinet 1 is abnormally heated, the pressure in the medium storage box 5 is greater than the pressure in the electrical cabinet 1. The piston 7 moves upward in the vertical direction under the action of the internal pressure of the medium storage box 5, driving the magnet 6 to move. The movable part 4 magnetically connected to the magnet 6 moves with the magnet 6 and abuts against the conductive part 3, thereby giving the control module 12 a conduction signal. After receiving the conduction signal, the control module 12 issues an alarm of abnormal heating.

[0034] An elastic component, such as a coil spring, is installed between the bottom of the inner wall of the media storage box 5 and the piston. As the pressure within the media storage box gradually decreases, the piston 7 gradually returns to its original position under the elastic force of the elastic component. When the electrical cabinet 1 is operating normally, the elastic component is in a freely retractable state, the first contact on the movable member disconnects from the second contact on the conductive member, and the conduction signal disappears.

[0035] Specifically, the control module 12 is connected to the alarm module signal, and the alarm module sends an alarm to the monitor for human intervention. The alarm module is a common technical solution in the prior art and will not be described in detail here.

[0036] The substation with the function of detecting abnormal heating can detect the pressure change of the gas in the electrical cabinet 1 in the substation to know whether there is abnormal heating, which can reduce the use of sensors and avoid inaccurate detection due to incorrect sensor setting position, and has good practicality.

[0037] In one embodiment, the medium can be a low-boiling-point liquid, or a gas with a volume expansion coefficient greater than 1 / 273; the low-boiling-point liquid can have a certain delay before vaporization, thereby reducing the probability of false alarms; and the gas with a volume expansion coefficient greater than 1 / 273 can expand more rapidly than the insulating gas in the electrical cabinet 1 at high temperatures, thereby obtaining a faster detection effect; therefore, preferably, the medium should be a low-boiling-point liquid, and the volume expansion coefficient of the gas after vaporization should be greater than 1 / 273.

[0038] In one embodiment, the magnet 6 is fixedly connected to the piston 7 .

[0039] In one embodiment, the conductive part 3 is made of copper or copper alloy which is not attracted by the magnet 6; the wire is of sufficient length to meet the movement requirements of the movable part 4 to avoid interference and wire breakage caused by movement and pulling.

[0040] In one embodiment, the electrical cabinet 1 is further provided with a heat dissipation device, and the control module 12 is signal-connected to the heat dissipation device.

[0041] In one embodiment, the heat dissipation device has a plurality of successively increasing gears, and the larger the gear, the stronger the corresponding heat dissipation intensity.

[0042] In one embodiment, the control module 12 controls the heat dissipation device to adjust the gear according to the comparison between the duration of the conduction signal and a preset time threshold, until the conductive member 3 is disconnected from the movable member 4 .

[0043] Specifically, the control module 12 also compares the current magnitude I of the conduction signal with a preset current threshold. As the heating becomes more severe, the medium pressure in the medium storage box increases, which in turn increases the contact area between the movable member 4 and the conductive member 3 and the current flowing therethrough. Therefore, monitoring the current magnitude of the conduction signal can also determine the direction of the heating anomaly.

[0044] In one embodiment, the time threshold includes a first time threshold t1, a second time threshold t2, and a third time threshold t3, and t1<t2<t3; the current threshold includes a first current threshold I1, a second current threshold I2, and a third current threshold I3, and I1<I2<I3;

[0045] The first comparison result is a comparison result of the duration t of the conduction signal and the time threshold, and the second comparison result is a comparison result of the current magnitude I of the conduction signal and the current threshold. The control module 12 sends a comprehensive comparison result consisting of the first comparison result and the second comparison result to the heat dissipation device and the alarm module, and performs the following steps:

[0046] (1) When the comparison result is I>I3, the gear position of the heat dissipation device is the maximum gear position;

[0047] (2) When the comparison result is I>I3 and t>t1, the gear position of the heat dissipation device is the maximum gear position and an alarm is sent to the monitor through the alarm module for human intervention;

[0048] (3) When the comparison result is t1 < t < t2, proceed as follows:

[0049] (3a) When I2<I<I3, the gear position of the heat dissipation device is adjusted to a third gear position which is smaller than the maximum gear position;

[0050] (3b) When I1<I<I2, the gear position of the heat dissipation device is adjusted to a second gear position which is smaller than the third gear position;

[0051] (3c) When I<I1, the gear position of the heat dissipation device is adjusted to a first gear position which is smaller than the second gear position;

[0052] (4) When the comparison result is t2 < t < t3, proceed in the following manner:

[0053] (4a) When I2<I<I3, the gear position of the heat dissipation device is adjusted to the maximum gear position;

[0054] (4b) When I1<I<I2, the gear position of the heat dissipation device is adjusted to a third gear position that is smaller than the maximum gear position;

[0055] (4c) When I<I1, the gear position of the heat dissipation device is adjusted to a first gear position which is smaller than the second gear position;

[0056] (5) When the comparison result is t>t3, proceed in the following manner:

[0057] (4a) When I2<I<I3, the gear position of the heat dissipation device is adjusted to the maximum gear position and an alarm is sent to the monitor through the alarm module for human intervention;

[0058] (4b) When I1<I<I2, the gear position of the heat dissipation device is adjusted to the maximum gear position;

[0059] (4c) When I<I1, the gear position of the heat dissipation device is adjusted to a first gear position which is smaller than the second gear position;

[0060] When the comparison result is I<I1 and t>t3, the heating anomaly in the electrical cabinet 1 is considered to have ended, and the control module 12 sends a signal indicating that the heating anomaly processing is completed to the monitor through the alarm module.

[0061] In one embodiment, the heat dissipation device includes a cooling fan 9 and a supporting arc plate 8, the cooling fan 9 is arranged on the supporting arc plate 8, the supporting arc plate 8 is provided with air guide holes adapted to the cooling fan 9, the supporting arc plate 8 is fixedly connected to the top of the shell of the electrical cabinet 1, and the supporting arc plate 8 and the shell of the electrical cabinet 1 form an air duct.

[0062] Specifically, the supporting arc plate 8 includes a first inclined arc plate, a connecting arc plate and a second inclined arc plate connected in sequence. The first inclined arc plate, the connecting arc plate and the second inclined arc plate connected in sequence form a saddle-shaped structure with a low middle and high sides. The cooling fan 9 and the air guide hole are both arranged on the connecting arc plate, so that the air duct forms a Venturi tube structure. The first inclined arc plate and the second inclined arc plate both form the inlet section and the contraction section of the Venturi tube with the upper surface of the shell of the electrical cabinet 1. The arc connecting plate forms the throat of the Venturi tube, and the air guide hole forms the diffusion section of the Venturi tube. Through the above design, the air duct of the Venturi tube structure can obtain sufficient air volume and sufficient air flow rate in the throat section to take away heat.

[0063] In one embodiment, a plurality of heat dissipation fins 11 are provided on the top of the housing of the electrical cabinet 1. The heat dissipation fins 11 are located in the air duct. Specifically, the plurality of heat dissipation fins 11 are arranged in an array below the connecting arc plate.

[0064] Through the above design, the airflow entering from the inlet section and the contraction section contacts the heat dissipation fins 11 and takes away the heat. Since the airflow contacts the heat dissipation fins 11 and generates turbulence, it is necessary to accelerate the throat section to make the airflow converge and circulate quickly, so that the heat can be taken away smoothly.

[0065] In one embodiment, the heat dissipation device also includes an adjustment plate 10, which includes a first hinged plate, a flexible connecting plate and a second hinged plate connected in sequence. The first hinged plate and the second hinged plate are respectively hinged to the top of the shell of the electrical cabinet 1, and the flexible connecting tube is provided with a clearance position adapted to the heat dissipation fins 11.

[0066] Specifically, the length direction of the adjustment plate 10 is consistent with the length direction of the supporting arc plate 8, and the flexible connecting plate is a retractable corrugated structure. The top of the shell of the electrical cabinet 1 is provided with a first support rod and a second support rod, the first hinged plate is hinged to the first support rod, and the second hinged plate is hinged to the second support rod; through this design, when the gear of the cooling fan 9 is adjusted higher, due to the Bernoulli principle, the first hinged plate moves away from one end of the cooling fan 9 and the second hinged plate moves away from one end of the cooling fan 9 toward the top of the shell of the electrical cabinet 1, and at the same time, it will also drive the said, so that when the first hinged plate and the second hinged plate are active, the flexible connecting plate can be driven to move, thereby adjusting the diameter of the air duct, so that the air duct is more in line with the gear of the cooling fan 9, thereby obtaining a better heat dissipation effect.

[0067] In one embodiment, the supporting arc plate 8 and the adjusting plate are both provided with a plurality of heat sinks, which further improve the overall heat dissipation effect.

[0068] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A substation with a function of detecting abnormal heating, characterized in that: Several electrical cabinets are provided in the substation, and the electrical cabinets include: an insulating plate fixedly connected to the outer surface of the housing of the electrical cabinet; The control module, the conductive part and the movable part are all arranged on the insulating plate; The medium storage box, the magnet and the piston are all arranged in the electrical cabinet; The medium storage box has an upward opening, the piston is sealed and connected to the medium storage box and slides in a vertical direction, the medium storage box is filled with a preset volume of medium, the magnet is provided on the upper surface of the piston, the movable member is magnetically connected to the magnet, and the conductive member and the movable member are respectively connected to the control module via wires; When the electrical cabinet is abnormally heated, the movable member magnetically connected to the magnet abuts against the conductive member and generates a conduction signal. After receiving the conduction signal, the control module issues an alarm indicating abnormal heating. When the electrical cabinet is normal, the movable member magnetically connected to the magnet is disconnected from the conductive member. The electrical cabinet is further provided with: a heat dissipation device, which is signal-connected to the heat dissipation device; The heat dissipation device has a plurality of gears that increase in sequence, and the control module controls the heat dissipation device to adjust the gear according to the comparison between the duration of the conduction signal and a preset time threshold, until the conductive member is disconnected from the movable member; The control module also compares the current magnitude I of the conduction signal with a preset current threshold; The first comparison result is the comparison result of the duration t of the conduction signal and the time threshold, and the second comparison result is the comparison result of the current magnitude I of the conduction signal and the current threshold. The control module sends the comprehensive comparison result consisting of the first comparison result and the second comparison result to the heat dissipation device.

2. A substation with a function of detecting abnormal heating according to claim 1, characterized in that: The magnet is fixedly connected to the piston.

3. A substation with a function of detecting abnormal heating as claimed in claim 2, characterized in that: The heat dissipation device includes a cooling fan and a supporting arc plate. The cooling fan is arranged on the supporting arc plate. The supporting arc plate is provided with air guide holes adapted to the cooling fan. The supporting arc plate is fixedly connected to the top of the shell of the electrical cabinet. The supporting arc plate and the shell of the electrical cabinet form an air duct.

4. A substation with a function of detecting abnormal heating as claimed in claim 3, characterized in that: A plurality of heat dissipation fins are provided on the top of the shell of the electrical cabinet, and the heat dissipation fins are located in the air duct.

5. The substation with the function of detecting abnormal heating as claimed in claim 4, characterized in that: The heat dissipation device also includes an adjustment plate, which includes a first hinged plate, a flexible connection plate and a second hinged plate connected in sequence. The first hinged plate and the second hinged plate are respectively hinged to the top of the shell of the electrical cabinet, and the flexible connection tube is provided with a clearance position adapted to the heat dissipation fins.

6. A substation with a function of detecting abnormal heating according to claim 5, characterized in that: The supporting arc plate and the adjusting plate are both provided with a plurality of heat sinks.

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