Box transformer substation for wind power generation

Abstract

The utility model relates to the technical field of box transformers, in particular to a box transformer for wind power generation, which comprises a transformer in a transformation chamber, a cooling device for radiating the transformer, a controller in the transformation chamber, a temperature sensor for monitoring the temperature in the transformation chamber, and a second sensor, the second sensor is used for monitoring whether the wind power generation device is in a power generation state or not, the output end of the second sensor is connected with the input end of the controller, and when the controller receives that a temperature signal monitored by the temperature sensor reaches a set threshold value and / or the second sensor monitors that the wind power generation device is in the power generation state, the wind power generation device is started. The controller controls the cooling device to operate, the second sensor is arranged to monitor whether the wind power generation device carries out power generation work or not, the box transformer substation can be cooled when the box transformer substation starts to work, and therefore the temperature of the box transformer substation is prevented from rising to be too high; and the problem that the cooling device cannot be started due to damage of the temperature sensor can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of box transformers, in particular to a box transformer for wind power generation. Background Art

[0002] The main function of the box transformer for wind power generation is to increase the electric energy generated by the wind power generation device to a high voltage state for power transmission. The difference between it and the traditional box transformer is that its working time is affected by the wind. That is, when there is wind, the wind power generation device can convert mechanical energy into electrical energy, and then transmit the electrical energy through the box transformer. In windless weather, the wind power generation device and the box transformer connected to the wind power generation device are in an inoperative state.

[0003] When the box transformer is working, a cooling device is often needed to cool the transformer inside the transformer chamber. There are also temperature sensors and controllers inside the transformer chamber to cooperate with the cooling device. That is, when the internal temperature of the transformer chamber is high, the temperature sensor can monitor the temperature inside the transformer chamber and transmit the temperature signal to the controller. The controller controls the cooling device to work and realize the cooling of the transformer chamber. The defect of this method is that when the temperature sensor monitors that the internal temperature of the transformer chamber is high, the internal temperature of the transformer chamber is already very high at this time, and the cooling device needs a long time to reduce the temperature of the transformer. Based on this, it is necessary to design a box transformer for wind power generation to solve the above problem. Utility Model Content

[0004] The utility model provides a box transformer for wind power generation, which monitors whether the wind power generation device is in a working state by setting a second sensor. When the wind power generation device is in a power generation state, the controller controls the cooling device to work, thereby preventing the transformer from working in a high temperature environment.

[0005] The technical problem solved by the present invention is achieved by the following technical solutions:

[0006] The utility model provides a box transformer for wind power generation, comprising a transformer inside a transformer chamber and a cooling device for dissipating heat from the transformer. The transformer chamber is further provided with a controller and a temperature sensor for monitoring the temperature inside the transformer chamber. The input end of the controller is connected to the output end of the temperature sensor for receiving a temperature signal monitored by the temperature sensor. The output end of the controller sends a control signal, which is used to control the operation of the cooling device. The utility model also includes a second sensor, which is used to monitor whether the wind power generation device is in a power generation state. The output end of the second sensor is connected to the input end of the controller. When the temperature signal monitored by the temperature sensor received by the controller reaches a set threshold and / or the second sensor monitors that the wind power generation device is in a power generation state, the controller controls the operation of the cooling device.

[0007] Preferably, the second sensor is a rotation speed sensor for monitoring the rotation speed of the blades of the wind power generation device.

[0008] Preferably, the wind power generation device is connected to the input end of the box transformer through a first cable, and the second sensor is installed on the first cable.

[0009] Preferably, the output end of the box-type transformer realizes power transmission through a second cable, and the second sensor is installed on the second cable.

[0010] Preferably, the second sensor is an inductive voltage sensor, a magnetic inductive current sensor or a photoelectric current sensor.

[0011] Preferably, the cooling device is a fan and / or air conditioner located inside the transformer chamber.

[0012] The beneficial effect of the present invention is that by setting a second sensor to monitor whether the wind power generation device is performing power generation, the box transformer can be cooled when the box transformer starts working, thereby preventing the box transformer temperature from rising too high.

[0013] By configuring the second sensor to be a rotation speed sensor capable of monitoring the wind power generation device, it is possible to accurately determine whether the current wind power generation device is in a power generation state.

[0014] By setting the second sensor as an inductive voltage sensor, a magnetic induction current sensor or a photoelectric current sensor, it is possible to monitor whether the cable at the input or output end of the box transformer has power transmission, thereby determining whether the wind power generation device is in working condition.

[0015] Providing a second sensor can also avoid the problem of the cooling device being unable to start due to damage to the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation scheme of the present invention or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is an isometric diagram of the utility model:

[0018] Figure 2 It is a front view of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the box-type transformer of the present utility model;

[0020] Figure 4 This is the front view of the utility model;

[0021] Figure 5 This is a schematic diagram of the principle of the circuit control system of the utility model.

[0022] In the figure, 1. Wind turbine; 2. Box transformer; 3. Temperature sensor; 4. Transformer; 5. Controller; 6. Cooling device; 7. Transformer room; 8. Fan; 9. Speed ​​sensor; 10. First cable; 11. Second cable; 12. Electrical monitoring sensor. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0024] refer to Figures 1-4 First, the existing technology of the wind power box transformer 2 structure of the utility model is explained. During its operation, the wind power box transformer 2 mainly boosts the electricity generated by the wind power generation device 1 and transmits it over long distances. Therefore, when the wind power generation device 1 is working to generate electricity, the wind power box transformer 2 is working at the same time. The transformer chamber 7 of the traditional wind power box transformer 2 is equipped with a cooling device, a temperature sensor 3 and a controller 5 to realize the temperature control of the transformer 4 inside the transformer chamber 7. The principle of temperature control is that when the box transformer 2 is working, the transformer 4 inside the transformer chamber 7 is working. The heat generated during operation causes the temperature inside the transformer chamber 7 to rise. The temperature sensor 3 detects the temperature increase inside the transformer chamber 7 and transmits the temperature signal to the controller 5. The controller 5 controls the cooling device to work, so that the temperature inside the transformer chamber 7 decreases. As can be seen from the above, the existing box transformer 2 has a defect that when the temperature sensor 3 detects the temperature increase, the internal temperature of the transformer chamber 7 is already very high. At this time, the cooling device cools down the transformer 4 again, and the transformer 4 needs a long time to cool down. Based on this problem, it is necessary to design a box transformer 2 for wind power generation to solve the above problem.

[0025] refer to Figures 1-4 On the basis of the existing technology, the utility model adds a second sensor, which is used to monitor whether the wind power generation device 1 is in the power generation working state. The output end of the second sensor is connected to the input end of the controller 5. When the controller 5 receives the signal from the second sensor that the wind power generation device 1 is in the power generation working state, the controller 5 controls the cooling device to work, so that the transformer chamber 7 is at a lower operating temperature. Compared with the traditional temperature sensor 3, the signal to start the cooling device is more sensitive.

[0026] Specifically, the second sensor may be a speed sensor 9 for monitoring the speed of the blades of the wind turbine 1. The speed sensor 9 determines whether the wind turbine 1 and the transformer 2 are in working condition by monitoring whether the blades of the wind turbine 1 are rotating.

[0027] Specifically, the wind power generation device 1 and the input end of the transformer 2 are connected through a first cable 10 to realize power transmission, and the output end of the transformer 2 realizes high-voltage power transmission through a second cable 11. The second sensor can be a current or voltage monitoring device installed on the first cable 10 or the second cable 11. The specific second sensor can be an electrical monitoring sensor 12. The electrical monitoring sensor 12 can be an inductive voltage sensor, a magnetic induction current sensor or a photoelectric current sensor. By monitoring whether there is power transmission on the first cable 10 or the second cable 11, it is determined whether the wind power generation device 1 is in the power generation working state. When the wind power generation device 1 is in the power generation working state, the second sensor transmits a signal to the controller 5, and the controller 5 controls the cooling device to work. It should be further explained that the cooling device can be a fan 8 or an air-conditioning device 6 to achieve cooling of the transformer 4 inside the transformer room 7.

[0028] Specific references Figure 5 After the second sensor is added to the present invention, the controller can control the cooling device to start cooling work regardless of whether it receives a signal from the temperature sensor 3 that the temperature has reached the set value or a signal from the second sensor that the wind turbine generator 1 is in the power generation working state. This also avoids the problem that the cooling device cannot dissipate heat normally due to damage to the temperature sensor 3.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A box transformer for wind power generation, comprising a transformer (4) located inside a transformer chamber (7) and a cooling device for dissipating heat from the transformer (4), wherein the transformer chamber (7) further comprises a controller (5) and a temperature sensor (3) for monitoring the temperature inside the transformer chamber (7), wherein the input end of the controller (5) is connected to the output end of the temperature sensor (3) for receiving a temperature signal monitored by the temperature sensor (3), and the output end of the controller (5) sends a control signal, wherein the control signal is used to control the operation of the cooling device, wherein the box transformer comprises a transformer (4) located inside a transformer chamber (7) and a cooling device for dissipating heat from the transformer chamber ... cooling device comprises a cooling device (5) and a cooling device (6) for dissipating heat from the transformer chamber (7), wherein the cooling device comprises a cooling device (6) and a cooling device (7) for dissipating heat from the transformer chamber (7), wherein the cooling device comprises a cooling device (6) and a cooling device (6) for dissipating heat from the transformer chamber (7), wherein the cooling device comprises a cooling device (6) and a cooling device (6) for dissipating heat from the transformer chamber (7), wherein the cooling device comprises a cooling device (6) and a cooling device (6) for dissipating heat from the transformer chamber (7), wherein the cooling device comprises a cooling device (6) and a cooling device (6) for dissipating heat from the transformer chamber (7), wherein the cooling device comprises a cooling device (6) and a cooling device (6) The device further comprises a second sensor for monitoring whether the wind power generation device (1) is in a power generation state. The output end of the second sensor is connected to the input end of the controller (5). When the temperature signal monitored by the temperature sensor (3) received by the controller (5) reaches a set threshold value and / or the second sensor monitors that the wind power generation device (1) is in a power generation state, the controller (5) controls the operation of the cooling device.

2. A box-type transformer for wind power generation according to claim 1, characterized in that: The second sensor is a rotation speed sensor (9) for monitoring the rotation speed of the blades of the wind power generation device (1).

3. The box-type transformer for wind power generation according to claim 1, characterized in that: The wind power generation device (1) is connected to the input end of the box transformer (2) via a first cable (10), and the second sensor is installed on the first cable (10).

4. The box-type transformer for wind power generation according to claim 1, characterized in that: The output end of the box transformer (2) realizes power transmission through a second cable (11), and the second sensor is installed on the second cable (11).

5. A box-type transformer for wind power generation according to claim 2 or 3, characterized in that: The second sensor is an inductive voltage sensor, a magnetic inductive current sensor or a photoelectric current sensor.

6. The box-type transformer for wind power generation according to claim 1, characterized in that: The cooling device is a fan (8) and / or an air conditioning device (6) located inside the transformer chamber (7).

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