Self-detection and self-protection oil immersed power transformer

Abstract

The utility model relates to the technical field of power equipment, in particular to a self-detection and self-protection oil-immersed power transformer which comprises a transformer box body, a self-detection protection assembly and a controller, a coil iron core group is arranged in the transformer box body, and transformer oil is arranged outside the coil iron core group in the transformer box body. The self-detection protection assembly comprises a gas chromatograph, a gas sensor and an alarm, and one side of the bottom of the transformer box body is connected with an oil outlet detection control assembly in a penetrating manner; the gas sensor is used for carrying out self-detection on gas in the transformer box body, when the gas sensor detects abnormal smell, data are sent to the controller, the controller starts the electric valve body to quantitatively discharge oil to a sample inlet of the gas chromatograph, and the gas chromatograph is used for automatically detecting the transformer oil; the operation condition and the health degree of the transformer are effectively judged, an alarm is given through the alarm after detection, an operator is reminded to take corresponding measures, protection detection is automatically carried out, and the troubleshooting time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a self-detecting and self-protecting oil-immersed power transformer. Background Technique

[0002] The main components of an oil-immersed power transformer include an iron core, windings, an oil tank, an oil pump, a cooling device, a grounding device, etc. Oil-immersed power transformers are usually used in high-voltage power transmission systems to transmit high-voltage electrical energy from power plants to low-voltage distribution networks, or in high-power applications such as industrial production, commercial facilities, hospitals, etc., to convert low-voltage electrical energy into a suitable voltage level for use.

[0003] During the manual maintenance process of an oil-immersed transformer, when the air release valve is manually lifted, gas is found inside the transformer. After the operation of the oil-immersed transformer, the presence of gas is mostly due to the lack of operations such as interlayer short circuits after the transformer runs, resulting in gas inside the transformer, causing the transformer to operate unstably, affecting the normal operation of the equipment, and even leading to safety accidents. Conventional tests and resistance tests are difficult to detect faults, and due to the wide distribution of oil-immersed transformers, it is time-consuming and laborious to detect them one by one manually, with a large work intensity. Content of the Utility Model

[0004] The purpose of the utility model is to provide a self-detecting and self-protecting oil-immersed power transformer to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A self-detecting and self-protecting oil-immersed power transformer includes a transformer box body, a self-detecting and protecting component, and a controller. There is a coil iron core group inside the transformer box body, and transformer oil is arranged outside the coil iron core group inside the transformer box body. The self-detecting and protecting component includes a gas chromatograph, a gas sensor, and an alarm. One side of the bottom of the transformer box body is connected with a detected oil control component in a penetrating manner.

[0007] As a preferred scheme of the utility model, the gas sensor is located at the inner top of the transformer box body, the detection probe of the gas sensor extends inside the transformer box body, and the gas sensor is electrically connected to the controller through a wire.

[0008] As a preferred scheme of the utility model, the gas chromatograph is located outside one side of the transformer box body, and the gas chromatograph is electrically connected to the controller through a wire.

[0009] As a preferred embodiment of the present utility model, the detected oil outlet control assembly includes a connecting pipe, an oil outlet pipe, and an electric valve body. An electrically controlled moving valve core is arranged inside the electric valve body. One end of the electric valve body, the oil inlet, is connected to the connecting pipe in a through manner, and one end of the electric valve body, the oil outlet, is connected to the oil outlet pipe in a through manner. The height of the oil inlet is lower than that of the connecting pipe, the height of the oil outlet is higher than that of the oil inlet, the height of the oil outlet pipe is higher than that of the connecting pipe, and the outlet of the oil outlet pipe is connected to the sample inlet of the gas chromatograph.

[0010] As a preferred embodiment of the present utility model, the electric valve body is electrically connected to the controller through a wire.

[0011] As a preferred embodiment of the present utility model, the controller is connected to the alarm through a wire.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] In response to the problems raised in the background art, this application sets up an automatic detection device to self-detect the gas inside the transformer box through a gas sensor. When the gas sensor detects an abnormal smell, it sends data to the controller, and the controller starts the electric valve body to quantitatively discharge oil to the sample inlet of the gas chromatograph. The gas chromatograph automatically detects the transformer oil, effectively judging the operating condition and health degree of the transformer. After the detection, an alarm is given through the alarm to remind the operator to take corresponding measures. Through automatic detection, fault troubleshooting is carried out. The detection range is wide, and there is no need for manual detection one by one. Through automatic detection, the time for fault troubleshooting can be greatly shortened, thereby reducing the risks to personnel and equipment. At the same time, by recording and tracking the detection results, it can help the operator better understand the health condition of the transformer, so as to take more effective maintenance measures. Description of the Drawings

[0014] Figure 1 It is a side view of the whole of the present utility model;

[0015] Figure 2 It is a schematic diagram of the whole detected oil outlet control assembly of the present utility model;

[0016] Figure 3 It is a schematic diagram of the internal structure of the electric valve body of the present utility model;

[0017] Figure 4 It is a connection block diagram of the whole detected protection assembly of the present utility model.

[0018] In the figure: 1. Transformer box; 2. Coil iron core group; 3. Connecting pipe; 31. Oil outlet pipe; 33. Electric valve body. Detailed Embodiment

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Embodiment

[0020] In the present application document, each device adopts a conventional model in the prior art, and the control method is controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in the art. Therefore, the present application document will not be explained in detail.

[0021] Please refer to Figures 1-4 , the present utility model provides a technical solution: a self-detecting and self-protecting oil-immersed power transformer, including a transformer box body 1, a self-detecting and protecting component, and a controller. There is a coil iron core group 2 inside the transformer box body 1, and transformer oil is arranged outside the coil iron core group 2 inside the transformer box body 1. The self-detecting and protecting component includes a gas chromatograph, a gas sensor, and an alarm. One side of the bottom of the transformer box body 1 is connected through a detection oil outlet control component. The detection oil outlet control component includes a connecting pipe 3, an oil outlet pipe 31, and an electric valve body 33. An electrically controlled moving valve core is arranged inside the electric valve body 33. One end of the electric valve body 33 is connected to the connecting pipe 3 through the oil inlet, and one end of the electric valve body 33 is connected to the oil outlet pipe 31 through the oil outlet. The height of the oil inlet is lower than that of the connecting pipe 3, the height of the oil outlet is higher than that of the oil inlet, and the height of the oil outlet pipe 31 is higher than that of the connecting pipe 3. The outlet of the oil outlet pipe 31 is connected to the sample inlet of the gas chromatograph.

[0022] It should be noted that in this embodiment, through automatic detection, the time for troubleshooting can be greatly shortened, thereby reducing the risks to personnel and equipment. At the same time, by recording and tracking the detection results, it can help the operator better understand the health status of the transformer, so as to take more effective maintenance measures;

[0023] Furthermore, the electric valve body 33 is controlled by the controller to work. The electric valve body 33 rises and opens. At this time, the transformer oil inside the transformer box body 1 enters the connecting pipe 3, enters the inside of the electric valve body 33 through the connecting pipe 3, the transformer oil rises through the high-level oil inlet to reach the oil outlet pipe 31 and enters the sample inlet of the gas chromatograph. The controller controls the electric valve body 33 to move down and close. The gas chromatograph detects the transformer oil, effectively judges the operation status and health degree of the transformer, and after detection, an alarm is given through the alarm to remind the operator to take corresponding measures. Fault troubleshooting is carried out through automatic detection, and the detection range is wide.

[0024] Please refer to Figures 1-4, a gas sensor is located at the inner top of the transformer tank 1, and the detection probe of the gas sensor extends inside the transformer tank 1. The gas sensor is electrically connected to the controller through a wire; a gas chromatograph is located outside one side of the transformer tank 1, and the gas chromatograph is electrically connected to the controller through a wire; an electric valve body 33 is electrically connected to the controller through a wire; the controller is connected to an alarm through a wire.

[0025] It should be noted that in this embodiment, the gas inside the transformer tank 1 is self-detected by the gas sensor. When the gas sensor detects an abnormal smell, it sends data to the controller. The controller starts the electric valve body 33 to quantitatively discharge oil to the injection port of the gas chromatograph, and the gas chromatograph automatically detects the transformer oil, effectively judging the operating condition and health degree of the transformer. After the detection, an alarm is given through the alarm to remind the operator to take corresponding measures. Fault troubleshooting is carried out through automatic detection. The detection range is wide, and there is no need for manual detection one by one. Through automatic detection, the time for fault troubleshooting can be greatly shortened, thereby reducing the risks to personnel and equipment. At the same time, by recording and tracking the detection results, it can help the operator better understand the health condition of the transformer, so as to take more effective maintenance measures;

[0026] Furthermore, the signal transmission between the gas sensor and the controller is usually carried out in a wired manner. In wired communication, the sensor converts the detected change in gas concentration into an electrical signal, and then transmits these signals to the controller through wires. The controller receives the data signal and processes it. When the gas sensor detects an abnormal smell, it sends data to the controller. The controller starts the electric valve body 33 to quantitatively discharge oil to the injection port of the gas chromatograph, and the gas chromatograph automatically detects the transformer oil. When the gas sensor does not detect an abnormal smell, the electric valve body 33 does not work.

[0027] Furthermore, after receiving the signal, the controller processes these signals of the gas sensor and judges whether there is an abnormality according to a preset threshold. If the threshold is reached, the controller will start the electric valve body to quantitatively discharge oil; if the threshold is not reached, the electric valve body remains closed. At the same time, real-time monitoring and management of the entire system can also be realized through a wired bus.

[0028] The working process of the utility model:

[0029] When in use, the gas inside the transformer tank 1 is self-detected by the gas sensor, and data is sent to the controller. After receiving the signal, the controller processes these signals of the gas sensor and judges whether there is an abnormality according to a preset threshold. If the threshold is reached, the controller will start the electric valve body to quantitatively discharge oil; if the threshold is not reached, the electric valve body remains closed;

[0030] When the gas sensor detects an abnormal odor, it sends data to the controller, and the electric valve body 33 rises and opens. At this time, the transformer oil inside the transformer tank 1 enters the connecting pipe 3, passes through the connecting pipe 3 and enters the inside of the electric valve body 33. The transformer oil rises and reaches the oil outlet pipe 31 through the high-level oil inlet, and then enters the sample inlet of the gas chromatograph. The controller controls the electric valve body 33 to move down and close. The gas chromatograph detects the transformer oil, effectively judges the operation status and health level of the transformer. After the detection, an alarm is given through the alarm to remind the operator to take corresponding measures. Fault troubleshooting is carried out through automatic detection, and the detection range is wide.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-detecting and self-protecting oil-immersed power transformer, comprising a transformer box (1), a self-detecting and protecting component and a controller, characterized in that: The transformer box (1) has a coil core group (2) inside, and transformer oil is arranged outside the coil core group (2) inside the transformer box (1). The self-detection protection component includes a gas chromatograph, a gas sensor and an alarm. One side of the bottom of the transformer box (1) is connected through an oil detection control component. The gas sensor is located at the top of the transformer box (1), a detection probe of the gas sensor extends inside the transformer box (1), and the gas sensor is electrically connected to the controller via a wire; The gas chromatograph is located outside one side of the transformer box (1), and the gas chromatograph is electrically connected to the controller via a wire; The oil detection control assembly comprises a connecting pipe (3), an oil outlet pipe (31) and an electric valve body (33); an electrically controlled motion valve core is arranged inside the electric valve body (33); an oil inlet at one end of the electric valve body (33) is connected to the connecting pipe (3); an oil outlet at one end of the electric valve body (33) is connected to the oil outlet pipe (31); the oil inlet is lower than the connecting pipe (3); the oil outlet is higher than the oil inlet; the oil outlet pipe (31) is higher than the connecting pipe (3); and the outlet of the oil outlet pipe (31) is connected to the sampling port of the gas chromatograph; The electric valve body (33) is electrically connected to the controller via a wire; The controller is connected to the alarm through a wire.

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