Self-energy-supply dehumidification system of transformer substation main transformer

Abstract

The invention relates to the technical field of power equipment, in particular to a self-powered dehumidification system of a transformer substation main transformer, which comprises a power generation module, a boosting module, a USB deconcentrator and a dehumidifier. The bidirectional performance of the thermoelectric effect is fully utilized, the power generation module converts heat energy of the main transformer into electric energy to supply energy to the additional dehumidifier through the Seebeck effect of the thermoelectric power generation piece, and the structure of an existing transformer does not need to be changed; equipment is added on the basis of original equipment without adding wiring; and energy can be absorbed locally without additional wiring, rotating parts and noise. The modification device is small in installation difficulty and low in cost; according to the dehumidifier, wet and hot air is condensed and dried through the cold end and condensed water is evaporated through the hot end through the Boer effect of the thermoelectric power generation piece, so that the service life of silica gel in the moisture absorber in the main transformer is prolonged, the maintenance work frequency is reduced, and the whole device is simple in structure, free of rotating mechanical parts and free of maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to a self-powered dehumidification system for a main transformer of a transformer substation. Background Art

[0002] Hainan, as a province located near the Tropic of Cancer, has a humid and rainy climate with high air humidity. The current main transformer designs are mostly designed for cold zone and continental monsoon climates. High air humidity places a heavy burden on the desiccant in the main transformer breather (referred to as the main transformer desiccant), making it difficult to dry the air, resulting in a high frequency of replacement of the silica gel in the main transformer breather. According to the actual work records of the main transformer breather maintenance, the breather silica gel is replaced once every 24 weeks for each main transformer on average. The maintenance cycle is short, the replacement is frequent, and the workload is high. However, if a low-power dehumidification device is directly added to the main transformer, it will add wiring difficulties. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the problem to be solved by the present invention is the difficulty in adding new equipment and wiring to the transformer.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a self-powered dehumidification system for a main transformer of a substation, comprising: a power generation module, which is arranged in the housing of the main transformer and is used to convert the heat energy dissipated by the main transformer into electrical energy; a boost module, which is electrically connected to the power generation module and is used to increase the electrical energy generated by the power generation module to electrical energy with a stable voltage; a USB splitter, which is electrically connected to the boost module; and a dehumidifier, which is electrically connected to the USB splitter via a USB connection.

[0006] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, the power generation module includes a heat conductive base, a heat sink and a first temperature difference power generation sheet, the heat conductive base is arranged above the main transformer, and the first temperature difference power generation sheet is arranged between the heat sink and the heat conductive base.

[0007] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, wherein: a first groove is opened in the middle of the upper surface of the thermally conductive base, and a plurality of the first temperature difference power generation sheets are laid in the first groove in two rows at intervals; the first temperature difference power generation sheet is provided with a first thermally conductive silicone grease, and the first thermally conductive silicone grease is arranged between the thermally conductive base and the first temperature difference power generation sheet.

[0008] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, wherein: the thermally conductive base is provided with a wiring bank between two rows of the first temperature difference power generation sheets, and the wiring bank is divided into a positive wiring bank and a negative wiring bank. The wiring bank connects the leads of several first temperature difference power generation sheets in parallel and leads them out to the outside of the thermally conductive base.

[0009] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, wherein: the radiator is provided with fins, a second groove, and thermal insulation cotton, the fins are arranged above the radiator, and the second groove is arranged below the radiator, so that two protrusions are formed on the bottom surface of the radiator, and the thermal insulation cotton is arranged in the second groove; the protrusions are correspondingly connected to the two rows of the first temperature difference power generation sheets, and a second thermal conductive silicone grease is arranged between the first temperature difference power generation sheet and the protrusions.

[0010] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, a third groove and a magnet are further provided at the lower end of the heat-conducting base, and the magnet is arranged in the third groove.

[0011] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, the dehumidifier includes a container and a second temperature difference power generation sheet, the container is arranged on the side of the main transformer, and the second temperature difference power generation sheet is electrically connected to the distributor.

[0012] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, the container is provided with a humid hot air inlet, a dry cold air outlet, and a partition, the partitions are vertically arranged at intervals to form a shaped flow channel, the humid hot air inlet is arranged at one end of the bottom of the shaped flow channel, the dry cold air outlet is arranged at one end of the top of the shaped flow channel, and the second temperature difference power generation sheet is arranged on the side close to the dry cold air outlet.

[0013] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, the second temperature difference power generation sheet is arranged on the side wall of the container, and one side of the second temperature difference power generation sheet is located inside the container and the other side is located outside the container.

[0014] As a preferred solution of the self-powered dehumidification system of the main transformer of the substation described in the present invention, a hydrophilic water guide strip is provided in the container, one end of the water guide strip is connected to the container, and the other end is provided with the second temperature difference plate located above one end outside the container.

[0015] The beneficial effects of the present invention are as follows: the present invention utilizes the temperature difference between the main transformer and the air to generate electrical energy, and there is no need to connect wires at the main transformer, so as to achieve the effect of local energy acquisition, and can supply energy for low-power equipment such as lighting, measurement and dehumidification, thereby solving the problem of wiring difficulties caused by newly added transformer equipment; when the outside air enters the container of the dehumidifier from the humid and hot air inlet, the dry air after condensation in the container enters the main transformer dehumidifier from the dry and cold air outlet, and the air entering the main transformer dehumidifier is preliminarily dried, so as to achieve upgrading and transformation on the basis of the existing main transformer dehumidifier, so that the service life of the silica gel in the main transformer respirator is extended, thereby reducing the number of maintenance work; and the liquid in the container can be automatically discharged and guided to the hot end surface to be heated and evaporated, so as to discharge the liquid in the container, and at the same time effectively avoid the water in the container directly dripping near the electrical equipment to cause accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 Scenario diagram of the self-powered dehumidification system for the main transformer of the substation.

[0018] Figure 2 This is a design schematic diagram of the self-powered dehumidification system for the main transformer of the substation.

[0019] Figure 3 This is a cross-sectional view of the power generation module of the self-powered dehumidification system of the substation main transformer.

[0020] Figure 4 This is a cross-sectional view of the thermal base of the self-powered dehumidification system for the main transformer of the substation.

[0021] Figure 5 A top view of the thermal base of the self-powered dehumidification system for the main transformer of the substation.

[0022] Figure 6 This is the dehumidifier structure diagram of the self-powered dehumidification system of the substation main transformer. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0026] Example 1

[0027] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and this embodiment provides a self-powered dehumidification system for a main transformer of a substation. The self-powered dehumidification system for a main transformer of a substation includes a power generation module 100, a boost module 200, a USB splitter 300 and a dehumidifier 400.

[0028] Specifically, the power generation module 100 is disposed in the main transformer housing and is used to convert the heat energy dissipated by the main transformer into electrical energy;

[0029] The boost module 200 is electrically connected to the power generation module 100 and is used to boost the electric energy generated by the power generation module 100 to electric energy with a stable voltage. The boost module 200 adopts the existing technology and will not be described in detail here.

[0030] It is worth noting that in this embodiment, a USB output boost module 200 is used to convert the electric energy generated by the temperature difference power generation module 100 into electric energy with a stable voltage of 5V for easy use of the device;

[0031] The USB hub 300 is electrically connected to the boost module 200. In this embodiment, the USB hub 300 is used to distribute electrical energy, using a standard USB with a uniform voltage of 5V. It is worth noting that the USB hub 300 is a prior art and will not be described in detail here.

[0032] The dehumidifier 400 is electrically connected to the USB splitter 300 via a USB connection. After the external air is preliminarily dehumidified by the dehumidifier 400, it enters the dehumidifier in the dehumidifier of the main transformer.

[0033] When in use, the heat energy dissipated by the main transformer is first converted into electric energy through the power generation module 100, and then the electric energy generated by the power generation module 100 is increased to electric energy with a stable voltage by the boost module 200, and the boosted electric energy is distributed to electrical appliances through the USB splitter 300. The temperature difference between the main transformer and the air is used to generate electric energy, and there is no need to connect wires at the main transformer, so that the effect of local energy acquisition can be achieved, and low-power equipment such as lighting, measurement and dehumidification can be supplied with energy, solving the wiring difficulties caused by the addition of transformer equipment.

[0034] Example 2

[0035] Reference Figure 2 to Figure 6 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0036] Specifically, the power generation module 100 includes a heat conductive base 101, a heat sink 102 and a first temperature difference power generation sheet 103. The heat conductive base 101 is arranged above the main transformer housing, and the first temperature difference power generation sheet 103 is arranged between the heat sink 102 and the heat conductive base 101.

[0037] The heat-conducting base 101 conducts the heat energy of the main transformer to one side of the first thermoelectric power generation sheet 103, and the heat sink 102 dissipates heat to the other side of the first thermoelectric power generation sheet, so that there is always a temperature difference between the two ends of the first thermoelectric power generation sheet. In this embodiment, the model of the thermoelectric power generation sheet is: SP1848. In this embodiment, the heat of the main transformer is transferred to the bottom surface of several first thermoelectric power generation sheets 103 through the heat-conducting base 101, and connected to the top surface of the first thermoelectric power generation sheet 103 through the heat sink 102, forming a good temperature step, which is conducive to the thermoelectric power generation sheet to generate electricity. The heat-conducting base 101 and the heat sink 102 are both made of aluminum. Among them, the thermoelectric power generation sheet 130 is a power generation device that directly converts thermal energy into electrical energy using the Seebeck effect. Its principle is: a p-type thermoelectric element and an n-type thermoelectric element are connected at the hot end with a metal conductor electrode, and the cold end electrodes are connected at their cold ends, so as to form a thermoelectric monomer or single couple. An external load with a resistance of RL is connected to the open-circuit end of the thermoelectric cell. If a heat flow is input to the hot surface of the thermoelectric cell and a temperature difference is established between the hot end and the cold end of the thermoelectric cell, a current will flow through the circuit and the load will receive an electrical power I 2 RL, thus obtaining a power generation device that converts thermal energy directly into electrical energy.

[0038] Specifically, a first groove 101a is opened in the middle of the upper surface of the heat-conducting base 101, and a plurality of first temperature difference power generation sheets 103 are laid in the first groove 101a in two rows at intervals; the first temperature difference power generation sheet 103 is provided with a first thermal conductive silicone grease 103a, and the first thermal conductive silicone grease 103a is arranged between the heat-conducting base 101 and the first temperature difference power generation sheet 103.

[0039] Specifically, the heat-conducting base 101 is provided with a wiring row 104 between two rows of first thermoelectric power generation sheets 103. The wiring row 104 is divided into a positive wiring row 104a and a negative wiring row 104b. The wiring row 104 connects the leads of several first thermoelectric power generation sheets 103 in parallel and leads them out to the outside of the heat-conducting base 101.

[0040] The bottom surface of the terminal block 104 is connected to the heat conductive base 101 through an insulating film, the positive electrode of each first thermoelectric power generation sheet 103 is electrically connected to the positive terminal block 104a, and the negative electrode of each first thermoelectric power generation sheet 103 is electrically connected to the negative terminal block 104b.

[0041] Specifically, the heat sink 102 is provided with fins 102a, a second groove 102b, and heat insulation cotton 102c. The fins 102a are provided above the heat sink 102, and the second groove 102b is provided below the heat sink 102, so that two protrusions 102d are formed on the bottom surface of the heat sink 102, and the heat insulation cotton 102c is provided in the second groove 102b; the protrusion 102d is connected to the two rows of first temperature difference power generation sheets 103 correspondingly, and the second thermal conductive silicone grease 103b is provided between the first temperature difference power generation sheet 103 and the protrusion 102d;

[0042] There are multiple fins 102a for increasing the heat dissipation area, the heat insulation cotton 102c is used to prevent heat loss from the surface of the main transformer, and the protrusion 102d and the first thermal conductive silicone grease 103b and the second thermal conductive silicone grease 103a are all for better thermal conductivity.

[0043] Specifically, the lower end of the heat-conducting base 101 is further provided with a third groove 101b and a magnet 101c, and the magnet 101c is arranged in the third groove 101b;

[0044] The heat-conducting base 101 is connected to the heat sink 102 by bolts, the heat-conducting base 101 is connected to the main transformer housing by magnets 101c, and the heat-conducting base 101 is arranged at the position with the highest temperature above the main transformer housing.

[0045] Specifically, the dehumidifier 400 includes a container 401 and a second temperature difference power generation sheet 402 . The container 401 is disposed on a side of the main transformer, and the second temperature difference power generation sheet 402 is electrically connected to the USB hub 300 .

[0046] Specifically, the container 401 is provided with a hot and humid air inlet 401a, a dry and cold air outlet 401b, and a partition 401c. The partition 401c is arranged vertically and spaced apart to form an S-shaped flow channel 401d. The hot and humid air inlet 401a is arranged at one end of the bottom of the S-shaped flow channel 401d, and the dry and cold air outlet 401b is arranged at one end of the top of the S-shaped flow channel. The second temperature difference power generation sheet 402 is arranged on a side close to the dry and cold air outlet 401b.

[0047] A partition 401c is vertically arranged at the bottom of the container, and there is a gap between the top and the top of the container 401. Another partition 401c is vertically arranged at the top of the container 401, and there is a gap between the bottom of the partition 401c and the bottom of the container 401 to form an S-shaped flow channel 401d, so that the hot and humid air inlet 401a and the dry and cold air outlet 401b are staggered, avoiding the hot and humid air inlet 401a and the dry and cold air outlet 401b to be directly connected, causing the hot and humid air to directly enter the main variable dehumidifier from the dry and cold air outlet 401b. In addition, due to the spacing of the partition 401c, the condensed water will be temporarily stored at the bottom of the container 401, and will not flow out of the container 401 from the hot and humid air inlet 401a, effectively preventing the water in the container 401 from directly dripping near the electrical equipment and causing accidents.

[0048] Specifically, the second thermoelectric power generation sheet 402 is disposed on the side wall of the container 401, and one side of the second thermoelectric power generation sheet 402 is located inside the container 401, and the other side is located outside the container 401;

[0049] It is worth noting that the second thermoelectric power generation sheet 402 utilizes the Peltier effect of the thermoelectric power generation sheet. When the thermoelectric power generation sheet is energized, the opposite phenomenon of thermoelectric power generation will occur, that is, after the current passes, one side of the thermoelectric power generation sheet will heat up and the other side will cool down. At this time, the cooling side is facing the inside of the container, and the heating side is set outside the container. The water vapor in the air is condensed into liquid on the cooling surface, achieving the effect of drying the air.

[0050] Specifically, a hydrophilic water guide strip 403 is provided in the container 401, one end of the water guide strip 403 is connected to the container 401, and the other end is provided with a second thermoelectric power generation sheet 402 located above one end outside the container 401;

[0051] The water guide strip 403 made of hydrophilic material is used to guide the condensed water in the container 401 to the hot end surface of the second thermoelectric power generation sheet 402, so that the liquid falling on the hot end surface of the second thermoelectric power generation sheet 402 is evaporated by heat. The water guide strip 403 can continuously discharge the liquid in the container 401 and guide it to the hot end surface of the second thermoelectric power generation sheet 402 for heating and evaporation, thereby discharging the liquid in the container 401 and effectively preventing the water in the container 401 from directly dripping near the electrical equipment and causing accidents.

[0052] The Peltier effect is commonly used in refrigeration equipment, such as heat dissipation of electronic equipment, cooling boxes, etc. The heat at the hot end is generally dissipated through a radiator to maintain the low temperature of the cold end. The heat at the hot end is usually wasted. The present invention cleverly uses the heat at the hot end to evaporate condensed water. This design not only effectively utilizes the heat at the hot end, but also uses the condensed water to dissipate the heat at the hot end, so that the hot end does not need to rely on a radiator for heat dissipation, and effectively utilizes the evaporated condensed water. The present invention achieves efficient conversion and utilization of energy by combining the condensation and evaporation processes in one device. This design not only improves the efficiency of the system, but also reduces additional energy consumption, meeting the requirements of energy conservation and environmental protection.

[0053] The present invention makes full use of the bidirectionality of the thermoelectric effect. The power generation module converts the heat energy of the main transformer into electrical energy through the Seebeck effect of the temperature difference power generation sheet, without changing the structure of the existing transformer; adding equipment on the basis of the original equipment does not require additional wiring; energy is extracted locally without additional wiring, no rotating parts, and no noise. The installation difficulty of the modified device is small and the cost is low; the dehumidifier 403 uses the Peltier effect of the temperature difference power generation sheet to condense and dry the hot and humid air at the cold end, and evaporates the condensed water at the hot end, so that the service life of the silica gel in the desiccant in the main transformer is extended, and at the same time, the water in the container 401 is effectively prevented from dripping directly near the electrical equipment and causing accidents. Thereby reducing the number of maintenance work, the entire device has a simple structure, no rotating mechanical parts, and no maintenance.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A self-powered dehumidification system for a main transformer of a substation, characterized in that: include, A power generation module (100) is arranged in the housing of the main transformer and is used to convert heat energy dissipated by the main transformer into electrical energy; A boost module (200) is electrically connected to the power generation module (100) and is used to boost the electric energy generated by the power generation module (100) to electric energy with a stable voltage; A USB splitter (300) electrically connected to the boost module (200); The dehumidifier (400) is electrically connected to the USB hub (300) via a USB connection.

2. The self-powered dehumidification system for the main transformer of a substation according to claim 1, characterized in that: The power generation module (100) comprises a heat-conducting base (101), a heat sink (102) and a first temperature difference power generation sheet (103); the heat-conducting base (101) is arranged above the main transformer housing; and the first temperature difference power generation sheet (103) is arranged between the heat sink (102) and the heat-conducting base (101).

3. The self-powered dehumidification system for the main transformer of a substation according to claim 2, characterized in that: A first groove (101a) is provided in the middle of the upper surface of the heat-conducting base (101), and a plurality of the first temperature difference power generation sheets (103) are arranged in two rows at intervals in the first groove (101a); The first temperature difference power generation sheet (103) is provided with a first thermal conductive silicone grease (103a), and the first thermal conductive silicone grease (103a) is arranged between the thermal conductive base (101) and the first temperature difference power generation sheet (103).

4. The self-powered dehumidification system for the main transformer of a substation according to claim 3, characterized in that: The heat-conducting base (101) is provided with a wiring row (104) between two rows of the first temperature difference power generation sheets (103); the wiring row (104) is divided into a positive wiring row (104a) and a negative wiring row (104b); the wiring row (104) connects the leads of a plurality of the first temperature difference power generation sheets (103) in parallel and leads them out to the outside of the heat-conducting base (101).

5. The self-powered dehumidification system for the main transformer of a substation according to claim 4, characterized in that: The heat sink (102) is provided with a fin (102a), a second groove (102b), and a heat insulation cotton (102c); the fin (102a) is provided above the heat sink (102); the second groove (102b) is provided below the heat sink (102), so that two protrusions (102d) are formed on the bottom surface of the heat sink (102); and the heat insulation cotton (102c) is provided in the second groove (102b); The protrusion (102d) is connected correspondingly to two rows of the first temperature difference power generation sheets (103), and a second thermal conductive silicone grease (103b) is arranged between the first temperature difference power generation sheets (103) and the protrusion (102d).

6. The self-powered dehumidification system for the main transformer of a substation according to claim 5, characterized in that: The lower end of the heat-conducting base (101) is also provided with a third groove (101b) and a magnet (101c), and the magnet (101c) is arranged in the third groove (101b).

7. The self-powered dehumidification system for the main transformer of a substation according to claim 6, characterized in that: The dehumidifier (400) comprises a container (401) and a second temperature difference power generation sheet (402); the container (401) is arranged on the side of the main transformer; and the second temperature difference power generation sheet (402) is electrically connected to the USB hub (300).

8. The self-powered dehumidification system for the main transformer of a substation according to claim 7, characterized in that: The container (401) is provided with a moist hot air inlet (401a), a dry cold air outlet (401b), and a partition (401c), wherein the partition (401c) is arranged vertically and spaced apart to form an S-shaped flow channel (401d), the moist hot air inlet (401a) is arranged at one end of the bottom of the S-shaped flow channel (401d), the dry cold air outlet (401b) is arranged at one end of the top of the S-shaped flow channel, and the second temperature difference power generation sheet (402) is arranged on a side close to the dry cold air outlet (401b).

9. The self-powered dehumidification system for the main transformer of a substation according to claim 8, characterized in that: The second thermoelectric power generation sheet (402) is arranged on the side wall of the container (401), and one side of the second thermoelectric power generation sheet (402) is located inside the container (401), and the other side is located outside the container (401).

10. The self-powered dehumidification system for the main transformer of a substation according to claim 9, characterized in that: A hydrophilic water guide strip (403) is provided in the container (401), one end of the water guide strip (403) is connected to the inside of the container (401), and the other end is provided with the second temperature difference power generation sheet (402) located above one end outside the container (401).

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