Transformer air cooling teaching aid

Abstract

The utility model discloses a transformer air cooling teaching appliance, and relates to the technical field of transformer teaching appliances. Comprising a transformer oil temperature simulation module used for simulating the oil temperature of a transformer; the load simulator is used for simulating the load when the transformer operates; the heat dissipation device is used for simulating a heat dissipation system of the transformer; the control module is electrically connected with the transformer oil temperature simulation module, the load simulator and the heat dissipation device; and the power supply is electrically connected with the transformer oil temperature simulation module, the load simulator, the control module and the heat dissipation device. The actual operation condition of the transformer is simulated according to the simulated oil temperature of the transformer and the simulated load of the transformer, and the heat dissipation device is controlled by simulating the actual operation condition of the transformer to simulate various states of the heat dissipation system of the transformer in actual operation, so that teaching is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer teaching tools, in particular to a transformer air-cooling teaching tool. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). The main functions of a transformer are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc.

[0003] In order to facilitate teaching, transformer teaching aids will be used. For example, the publication number is: CN115909866A, and the name is a transformer teaching simulation device, which includes a transformer body. The transformer body is provided with a main iron core and a winding. The main iron core is installed on a supporting device arranged at the bottom of the transformer body through a support. The supporting device includes a supporting platform and a cross plate arranged in parallel. The supporting platform is fixed to the support by bolts, so that it can play a certain degree of buffering role during transportation.

[0004] The above scheme uses the transformer body for teaching simulation, but cannot simulate various states of the transformer cooling system in actual operation, thus bringing inconvenience to actual teaching. Utility Model Content

[0005] In order to solve the problems of the prior art, the utility model provides a transformer air cooling teaching tool, comprising: a transformer oil temperature simulation module, used to simulate the oil temperature of the transformer;

[0006] Load simulator, used to simulate the load of the transformer during operation;

[0007] Heat dissipation device, used to simulate the heat dissipation system of the transformer;

[0008] A control module, electrically connected to the transformer oil temperature simulation module, the load simulator and the heat sink;

[0009] A power supply is electrically connected to the transformer oil temperature simulation module, the load simulator, the control module and the heat dissipation device.

[0010] Furthermore, the transformer oil temperature simulation module includes:

[0011] a heater, electrically connected to the power supply and the control module;

[0012] a temperature controller, electrically connected to the power supply and the control module;

[0013] A temperature sensor is connected to the heater and electrically connected to the temperature controller.

[0014] Furthermore, the power supply comprises:

[0015] System power supply;

[0016] A switching power supply, electrically connected to the system power supply and the heat sink;

[0017] A switching power supply, electrically connected to the system power supply, the heat sink and the control module, for converting the 220V AC power of the system power supply into a 24V DC power supply for use;

[0018] A first power supply module, electrically connected to the switching power supply and the heater, for converting DC 24V to 12V as a heating power supply;

[0019] The second power supply module is electrically connected to the switching power supply, the load simulator and the temperature controller, and is used to convert DC 24V to 5V.

[0020] Further, the control module includes: PLC1 and PLC2;

[0021] The PLC1 is electrically connected to the switching power supply and the temperature controller;

[0022] The PLC2 is electrically connected to the switching power supply and the load simulator.

[0023] Furthermore, a switch is connected between the first power module and the heater, and the switch is electrically connected to the PLC1.

[0024] Furthermore, the heat dissipation device is a fan, and the fan is electrically connected to the PLC1.

[0025] Furthermore, the number of the fans is eight.

[0026] Furthermore, it also includes: a control button electrically connected to the PLC1.

[0027] Furthermore, it also includes: a heat dissipation status light device, which is electrically connected to the fan.

[0028] The beneficial effects of the technical solution provided by the utility model are as follows: a transformer oil temperature simulation module, a load simulator, a heat dissipation device, a control module and a power supply are arranged in the utility model; the oil temperature of the transformer is simulated by the transformer oil temperature simulation module; the load of the transformer is simulated by the load simulator; the heat dissipation system of the transformer is simulated by the heat dissipation device; the actual operating condition of the transformer is simulated according to the simulated oil temperature of the transformer and the simulated load of the transformer; and the heat dissipation device is controlled by simulating the actual operating condition of the transformer to simulate various states of the transformer heat dissipation system in actual operation, thereby making teaching more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a circuit diagram of a transformer air-cooling teaching aid provided by the utility model;

[0030] Figure 2 It is a circuit diagram of a load simulator circuit provided by the utility model;

[0031] Figure 3 It is a circuit diagram of a temperature measurement circuit provided by the utility model;

[0032] Figure 4 It is a circuit diagram of a manual control loop provided by the utility model;

[0033] Figure 5 It is a circuit diagram of a heating circuit provided by the utility model;

[0034] Figure 6 It is a circuit diagram of a fan status circuit provided by the utility model;

[0035] Figure 7 It is a circuit diagram of a fan control circuit provided by the utility model;

[0036] Figure 8 It is a circuit diagram of a power supply circuit provided by the utility model;

[0037] Fig. 9 This is a terminal diagram of a control module provided by the utility model;

[0038] Fig.10 This is a terminal diagram of a control module provided by the utility model.

[0039] Figure markings: 1-load simulator; 2-heater; 3-temperature controller; 4-temperature sensor; 5-system power supply; 6-switching power supply; 7-first power module; 8-second power module; 9-PLC1; 10-PLC2; 11-switch; 12-fan; 13-control button. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] It should be noted that in this embodiment, the directions or positional relationships indicated by "bottom", "top", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] It should also be noted that, in this embodiment, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] See also Figure 1-Figure 10 A transformer air cooling teaching tool comprises: a transformer oil temperature simulation module, a load simulator 1, a heat dissipation device, a control module and a power supply.

[0045] Among them, the transformer oil temperature simulation module is used to simulate the oil temperature of the transformer, the load simulator 1 is used to simulate the load of the transformer through analog output, and the heat sink is used to simulate the heat dissipation system of the transformer; the control module is electrically connected to the transformer oil temperature simulation module, the load simulator 1 and the heat sink, and is used to simulate the actual operating conditions of the transformer according to the simulated oil temperature of the transformer and the simulated load of the transformer, and to control the heat sink by simulating the actual operating conditions of the transformer to simulate various states of the transformer heat dissipation system in actual operation, thereby making teaching more convenient; the power supply is electrically connected to the transformer oil temperature simulation module, the load simulator 1, the control module and the heat sink to supply power to them.

[0046] Furthermore, the power supply includes: a system power supply 5 , a switching power supply 6 , a first power supply module 7 and a second power supply module 8 ; the transformer oil temperature simulation module includes: a heater 2 , a temperature controller 3 and a temperature sensor 4 .

[0047] The switching power supply 6 is electrically connected to the system power supply 5, and is used to convert the system power supply 5220V AC power into a usable 24V DC power supply; the first power supply module 7 is electrically connected to the switching power supply 6 and the heater 2, and is used to convert the DC 24V to 12V module as a heating power supply; the second power supply module 8 is electrically connected to the switching power supply 6, the load simulator 1, and the temperature controller 3, and is used to convert the DC 24V to 5V module to power the temperature controller 3 and the load simulator 1.

[0048] Secondly, the control module includes: PLC19 and PLC210, PLC19 and PLC210 are electrically connected, PLC19 is electrically connected to the switching power supply 6 and the temperature controller 3, the temperature sensor 4 is electrically connected to the temperature controller 3, the temperature sensor 4 is connected to the heater 2, the heater 2 and the temperature sensor 4 work together to simulate the oil temperature of the transformer, the temperature controller 3 collects the temperature data of the temperature sensor 4, sets the temperature threshold, and feeds back the heating signal to PLC19; a switch 11 is connected between the first power module 7 and the heater 2, and the switch 11 is electrically connected to PLC19.

[0049] The PLC 210 is electrically connected to the switching power supply 6 and the load simulator 1 , and the load simulator 1 performs load simulation by outputting analog quantities to the PLC 210 .

[0050] Furthermore, the heat dissipation device is a fan 12. In this embodiment, there are eight fans 12, which are divided into four groups of two. The fans 12 are all electrically connected to the PLC 19, and the fans 12 are also electrically connected to the switching power supply 6.

[0051] In addition, the transformer air cooling teaching aid also includes: a control button 13, which is electrically connected to the PLC 19. The control button 13 is a manual / automatic and stop command input module, which controls the operation, stop and fan status feedback of the fan 12 in the manual / automatic state; when converting the analog quantity, the 0-10V voltage signal of the load simulator is converted into the 0-50,000 load corresponding to the transformer, simulating the load when the transformer is running.

[0052] Considering that the frequency of use and life of the transformer fan must be balanced, the fan is started in manual / automatic mode and a cyclic start method is adopted to ensure that all fans have the same operating frequency, frequency and service life in the same cycle.

[0053] In manual mode, when the transformer oil temperature reaches the alarm value, fans No. 1 and 3 on the left and fans No. 1 and 3 on the right are activated to cool the transformer down to below the alarm value. Then the fans are stopped. When the temperature rises to the alarm value for the second time, fans No. 2 and 4 on the left and fans No. 2 and 4 on the right are activated to cool the transformer down. This cycle of cooling is used to ensure equipment utilization.

[0054] In manual mode, the fans are started individually without any interlocking relationship between the fans. A damaged fan does not affect the start and stop of other fans. When three groups of fans are damaged, the fault light of the heat dissipation status light device lights up to remind you to inspect the heat dissipation fan.

[0055] In automatic mode, the fan operates in a variety of situations, combining the actual operating status of the transformer and taking into account the transformer's operating oil temperature and load.

[0056] Preset oil temperature alarm value, oil temperature upper limit value, oil temperature lower limit value, transformer low load value, transformer high load value; when the oil temperature reaches the alarm value and the transformer is running at low load, start 2 sets of fans for heat dissipation; when the oil temperature reaches the alarm value and the transformer is running at high load, all fans are turned on for heat dissipation; in automatic mode, fans are started individually, there is no locking relationship between fans, and a damaged fan does not affect the start and stop of other fans.

[0057] In addition, in automatic mode, a thermometer and an electric meter are electrically connected to PLC1. When the transformer is running at low load and the oil temperature exceeds the upper limit of the oil temperature, or when the transformer is running at high load and the oil temperature is lower than the lower limit of the oil temperature, the thermometer and the electric meter will give alarms respectively.

[0058] It should be noted that, in this embodiment, the model of each device is illustrated by way of example. The model of PLC1 may be CPU ST20, the model of PLC2 may be EMAM03, the model of the load simulator may be ACLT-3802W-3, the model of the temperature sensor may be DS18B20, and the model of the temperature controller may be DH-RZ1000B. Of course, different manufacturers' models may be selected for each electrical device, and the same functional effect may be achieved through relevant combinations.

[0059] In addition, the above-mentioned electrical connection is a connection method for achieving electrical continuity between circuits. It can be to connect different parts of the circuit through components such as wires, cables, connectors, etc. to allow current to flow between them; it can also be wireless, such as electromagnetic waves, radio frequencies, etc., to achieve energy or signal transmission without physical wire connection.

[0060] It is worth mentioning that the transformer air-cooling teaching aid can simulate the working mode of the transformer heat dissipation system in real life, which is convenient for teaching staff to conduct simulation teaching. At the same time, it can enable students to quickly understand the operating principle of the transformer heat dissipation system under various working conditions, demonstrate the working of the transformer heat dissipation system, facilitate teaching staff to conduct simulation teaching, and improve teaching effects.

[0061] In addition, in the utility model, except for the system power supply, safe voltage is used, so that the transformer heat dissipation system teaching device has high safety; and PLC1 can also be connected to the industrial control panel to display the relevant operating status and information of the transformer air-cooled teaching aid in real time through the industrial control panel.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer air cooling teaching aid, characterized in that: include: Transformer oil temperature simulation module, used to simulate the oil temperature of the transformer; A load simulator (1), used to simulate the load of the transformer during operation; Heat dissipation device, used to simulate the heat dissipation system of the transformer; A control module electrically connected to the transformer oil temperature simulation module, the load simulator (1) and the heat dissipation device; A power supply is electrically connected to the transformer oil temperature simulation module, the load simulator (1), the control module and the heat dissipation device.

2. The transformer air cooling teaching tool according to claim 1, characterized in that: The transformer oil temperature simulation module includes: a heater (2), electrically connected to the power supply and the control module; A temperature controller (3), electrically connected to the power supply and the control module; A temperature sensor (4) is connected to the heater (2) and is electrically connected to the temperature controller (3).

3. The transformer air cooling teaching tool according to claim 2, characterized in that: The power supply comprises: System power supply (5); A switching power supply (6), electrically connected to the system power supply (5), the heat dissipation device and the control module, and used for converting the 220V alternating current of the system power supply (5) into a 24V direct current power supply for use; A first power supply module (7), electrically connected to the switching power supply (6) and the heater (2), and used for converting a DC 24V to a 12V power supply as a heating power supply; The second power supply module (8) is electrically connected to the switching power supply (6), the load simulator (1) and the temperature controller (3) and is used to convert direct current 24V to 5V.

4. The transformer air cooling teaching tool according to claim 3, characterized in that: The control module includes: PLC1 (9) and PLC2 (10); The PLC1 (9) is electrically connected to the switching power supply (6) and the temperature controller (3); The PLC2 (10) is electrically connected to the switching power supply (6) and the load simulator (1).

5. The transformer air cooling teaching tool according to claim 4, characterized in that: A switch (11) is connected between the first power module (7) and the heater (2), and the switch (11) is electrically connected to the PLC1 (9).

6. The transformer air cooling teaching tool according to claim 4, characterized in that: The heat dissipation device is a fan (12), and the fan (12) is electrically connected to the PLC1 (9).

7. The transformer air cooling teaching tool according to claim 6, characterized in that: The number of the fans (12) is eight.

8. The transformer air cooling teaching tool according to claim 6, characterized in that: Also includes: A control button (13) is electrically connected to the PLC1 (9).

9. The transformer air cooling teaching tool according to claim 6, characterized in that: Also includes: A heat dissipation status light device is electrically connected to the fan (12).

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