Multifunctional oil-immersed distribution transformer practical training device

Abstract

The utility model belongs to the technical field of electrical operation and maintenance practical training devices, and particularly relates to a multifunctional oil-immersed distribution transformer practical training device, which comprises a transformer main body, and simulation heat sources are respectively arranged on the inner side wall of the transformer main body, an inner winding and an insulating sleeve at the top of the transformer; the simulation heat source is connected with an external power supply, and the temperature condition of the transformer in a normal operation state or an abnormal operation state is simulated through the simulation heat source. According to the utility model, the simulation heat sources are arranged on the components of the transformer main body, so that the heating conditions of the transformer main body and the porcelain insulating sleeve components of each phase can be simulated when the distribution transformer is in live operation under the condition of practical training teaching, and the temperature and the operation state of the distribution transformer can be detected and analyzed in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical operation and maintenance training devices, and particularly relates to a multifunctional oil-immersed distribution transformer training device. Background Technique

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] The operating state of a distribution transformer is not only related to the actual output capacity and service life of the transformer, but also related to the safe and stable operation of the distribution line and equipment. Using instruments to conduct infrared detection and insulation resistance tests on distribution transformers is an essential skill that distribution employees must master. Detecting the status and defects of transformers through distribution is convenient for discovering equipment defects and hidden dangers, and ensuring the safe commissioning and operation of transformers.

[0004] However, in practical training teaching, due to the lack of professional experience of the trainees and for safety reasons, it is impossible to carry out inspection exercises for the infrared detection project of distribution equipment in a real live environment. Moreover, in the practical training teaching of measuring the insulation resistance of transformers, due to the fact that the defect types are determined by objective circumstances and are single, and there is a lack of a special teaching device for defect comparison, it is not conducive to trainees to judge defects and faults through type comparison exercises. Content of the Utility Model

[0005] To overcome the deficiencies of the above-mentioned prior art, the utility model provides a multifunctional oil-immersed distribution transformer training device.

[0006] To achieve the above object, one or more embodiments of the utility model provide the following technical solutions:

[0007] The first aspect of the utility model provides a multifunctional oil-immersed distribution transformer training device, including a transformer body, and simulation heat sources are respectively arranged on the inner side wall, the inner winding of the transformer body, and the insulating bushing on the top of the transformer;

[0008] The simulation heat source is connected to an external power supply, and the temperature conditions of the transformer in a normal operating state or an abnormal operating state are simulated through the simulation heat source.

[0009] Further, the inner winding of the transformer body includes an A-phase winding, a B-phase winding, and a C-phase winding, and simulation heat sources are respectively arranged in front of each phase winding.

[0010] Further, simulation heat sources are respectively arranged on the inner side wall at the upper front position and the lower front position of the inner winding of the transformer body, which are respectively used to simulate the upper-layer oil temperature and the lower-layer oil temperature inside the oil tank.

[0011] Further, the simulated heat source is an electric heating wire.

[0012] Further, simulated heat sources are respectively provided on the porcelain insulating bushings of each phase on the high-voltage side at the top of the transformer.

[0013] Further, simulated heat sources are respectively provided at the inner top position of the porcelain insulating bushing of phase A on the high-voltage side, at the inner lower position of the porcelain insulating bushing of phase B on the high-voltage side, and at the inner middle position of the porcelain insulating bushing of phase C on the high-voltage side.

[0014] Further, the simulated heat sources are respectively connected to an external power supply through temperature control switches.

[0015] Further, simulated cracks are respectively provided on the porcelain insulating bushings of each phase on the low-voltage side of the transformer.

[0016] Further, a simulated crack is provided at the upper part of the porcelain insulating bushing of phase a on the low-voltage side of the transformer;

[0017] A penetrating simulated crack is provided on the porcelain insulating bushing of phase b on the low-voltage side of the transformer;

[0018] The porcelain insulating bushing of phase c on the low-voltage side of the transformer serves as a normal comparison phase and no crack is provided.

[0019] Further, the external power supply is a 220V single-phase power supply.

[0020] The above one or more technical solutions have the following beneficial effects:

[0021] (1) By providing simulated heat sources on various components of the transformer body, the present utility model can simulate the heat generation conditions of the transformer body and the porcelain insulating bushings of each phase during the live operation of the distribution transformer under the training teaching conditions, facilitating the trainees to use infrared detection equipment to conduct infrared detection on the distribution transformer body, bushings and other parts, so as to conduct real-time detection and analysis on the temperature and operating state of the distribution transformer.

[0022] (2) By providing different cracks on the porcelain insulating bushings, the present utility model solves the problems that during the insulation resistance test of the porcelain insulating bushings, the types of insulation resistance defects are single or even without defects, and there is a lack of comparison of different types of defects.

[0023] The advantages of the additional aspects of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0024] The accompanying drawings forming a part of this utility model are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation of the utility model.

[0025] Figure 1 It is the front view of a multifunctional oil-immersed distribution transformer training device for Embodiment 1.

[0026] Figure 2 It is the schematic diagram of the simulated heat source for Embodiment 1.

[0027] Figure 3 It is the rear view of a multifunctional oil-immersed distribution transformer training device for Embodiment 1.

[0028] In the figure, 1 is the transformer body, 2 is the high-voltage side A-phase porcelain insulating bushing, 3 is the high-voltage side B-phase porcelain insulating bushing, 4 is the high-voltage side C-phase porcelain insulating bushing, 5 is the simulated heat source, 6 is the low-voltage side a-phase porcelain insulating bushing, 7 is the low-voltage side b-phase porcelain insulating bushing, 8 is the low-voltage side c-phase porcelain insulating bushing, and 9 is the crack. Detailed implementation manners

[0029] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment 1

[0031] As Figure 1 shown, the present utility model proposes a multifunctional oil-immersed distribution transformer training device, which includes a transformer body 1. Simulated heat sources 5 are respectively arranged on the inner side wall, inner winding of the transformer body 1, and the insulating bushings on the top of the transformer; the simulated heat source 5 is connected to an external power supply, and the simulated heat source 5 is used to simulate the temperature conditions of the transformer under normal operating conditions or abnormal operating conditions.

[0032] The inner winding of the transformer includes an A-phase winding, a B-phase winding, and a C-phase winding. Simulated heat sources are respectively arranged at the front side positions of the A-phase winding, B-phase winding, and C-phase winding, respectively, for simulating the temperature conditions of each phase winding inside the transformer during operation.

[0033] Simulated heat sources 5 are respectively arranged on the inner side wall at the upper front side position and the lower front side position of the inner winding of the transformer body, respectively, for simulating the upper layer oil temperature and the lower layer oil temperature inside the oil tank.

[0034] On the top of the transformer, there are provided independent high-voltage side A-phase porcelain insulating bushings 2, high-voltage side B-phase porcelain insulating bushings 3, high-voltage side C-phase porcelain insulating bushings 4, as well as low-voltage side a-phase porcelain insulating bushings 6, low-voltage side b-phase porcelain insulating bushings 7, and low-voltage side c-phase porcelain insulating bushings 8.

[0035] On the porcelain insulating bushings of each phase on the high-voltage side at the top of the transformer, simulated heat sources are respectively provided. Specifically: at the top inner position of the porcelain insulating bushing 2 of phase A on the high-voltage side, at the lower end inner position of the porcelain insulating bushing 3 of phase B on the high-voltage side, and at the middle inner position of the porcelain insulating bushing 4 of phase C on the high-voltage side, simulated heat sources are respectively provided.

[0036] By setting simulated heat sources on various components of the transformer body, the present utility model can simulate the heat generation conditions of the transformer body and the porcelain insulating bushings of each phase when the distribution transformer is energized and operating under training teaching conditions, facilitating the trainees to use infrared detection equipment to conduct infrared detection on parts such as the distribution transformer body and bushings, so as to conduct real-time detection and analysis on the temperature and operating status of the distribution transformer.

[0037] In the present utility model, the multiple simulated heat sources provided on the transformer body are independent of each other, are respectively controlled by temperature control switches, and can set the heating degrees, such as selecting multiple gears for heating to 50°C, 95°C, etc. It solves the problem of temperature detection when simulating the operating state under the condition that the distribution transformer is out of operation in the training teaching scenario. Using this device can help trainees conduct repeated practice and analyze transformer defects and status through the detection results.

[0038] Among them, as Figure 2 shown, the simulated heat source 5 is an annular spiral electric heating wire. The simulated heat source is connected to a 220V single-phase power supply, and the simulated heat source is realized by the resistance wire generating heat.

[0039] Moreover, the simulated heat sources inside the porcelain insulating bushings of phase A, phase B, and phase C on the high-voltage side of the transformer adopt annular spiral resistance wires, which are respectively wound and fixed on the conductors inside the porcelain insulating bushings of each phase.

[0040] As a further technical solution, as Figure 3 shown, no crack treatment is performed on the insulating bushings on the high-voltage side of the transformer, and simulated cracks are respectively provided on the porcelain insulating bushings of each phase on the low-voltage side of the transformer.

[0041] Specifically, a simulated crack is provided at the upper part of the porcelain insulating bushing 6 of phase a on the low-voltage side;

[0042] A simulated crack is provided on the porcelain insulating bushing 7 of phase b on the low-voltage side, and the simulated crack is a penetrating crack that penetrates the entire porcelain insulating bushing 7 of phase b on the low-voltage side from top to bottom;

[0043] The porcelain insulating bushing 8 of phase c on the low-voltage side serves as a normal comparison phase and has no crack.

[0044] The utility model solves the problems of single insulation resistance defect type or even no defect, uncontrollable measurement object, and lack of comparison of different types of defects when performing insulation resistance tests on porcelain insulating sleeves by setting cracks on the porcelain insulating sleeves, compared with completely normal insulators.

[0045] Through the design of multiple functional items, the utility model enriches the teaching scenarios. Compared with the actual equipment for live detection of transformers, the device greatly reduces the risk coefficient and allows frequent operation.

[0046] Although the specific implementation manners of the present utility model are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications or deformations that can be made without creative efforts on the basis of the technical solutions of the present utility model are still within the protection scope of the present utility model.

Claims

1. A multifunctional oil-immersed distribution transformer training device, characterized in that: It comprises a transformer body, wherein simulated heat sources are respectively arranged on the inner side wall of the transformer body, the inner winding and the insulating sleeve on the top of the transformer; The simulated heat source is connected to an external power source, and the simulated heat source is used to simulate the temperature condition of the transformer in a normal operating state or an abnormal operating state.

2. A multifunctional oil-immersed distribution transformer training device according to claim 1, characterized in that: The internal windings of the transformer body include an A-phase winding, a B-phase winding and a C-phase winding, and a simulated heat source is provided at the front side of each phase winding.

3. A multifunctional oil-immersed distribution transformer training device according to claim 1, characterized in that: Simulated heat sources are respectively arranged on the inner side walls at the upper front side and the lower front side of the winding inside the transformer body, for simulating the upper oil temperature inside the oil tank and the lower oil temperature inside the oil tank respectively.

4. The multifunctional oil-immersed distribution transformer training device according to claim 1 is characterized in that: The simulated heat source is an electric heating wire.

5. The multifunctional oil-immersed distribution transformer training device according to claim 1 is characterized in that: A simulated heat source is respectively arranged on each phase porcelain insulating bushing on the high voltage side of the top of the transformer.

6. A multifunctional oil-immersed distribution transformer training device according to claim 5, characterized in that: Simulated heat sources are provided at the internal top position of the high-voltage side A-phase porcelain insulating bushing, the internal lower end position of the high-voltage side B-phase porcelain insulating bushing, and the internal middle position of the high-voltage side C-phase porcelain insulating bushing.

7. The multifunctional oil-immersed distribution transformer training device according to claim 1 is characterized in that: The simulated heat sources are connected to external power sources via temperature control switches.

8. The multifunctional oil-immersed distribution transformer training device according to claim 1 is characterized in that: Simulated cracks are respectively provided on the porcelain insulating bushings of each phase on the low-voltage side of the transformer.

9. The multifunctional oil-immersed distribution transformer training device according to claim 1 is characterized in that: A simulated crack is provided on the upper part of the porcelain insulating bushing of phase a on the low voltage side of the transformer; A penetrating simulated crack is arranged on the b-phase porcelain insulating bushing of the low-voltage side of the transformer; The c-phase porcelain insulating bushing on the low-voltage side of the transformer serves as a normal comparison phase and is not provided with cracks.

10. The multifunctional oil-immersed distribution transformer training device according to claim 1, characterized in that: The external power supply is a 220V single-phase power supply.

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