Power transformer with active anti-deflagration function and monitoring method

Abstract

The invention relates to a power transformer with an active anti-deflagration function and a monitoring method. The power transformer comprises a transformer oil tank, an ascending flanged base, a high-voltage bushing, a short-circuit copper sheet, a neutral point bushing, a high-frequency sensor and an ultrasonic sensor. The ascending flanged base and the neutral bushing are connected to the top of the transformer oil tank; one end of the high-voltage bushing is connected with the ascending flanged base through a bolt; two ends of the short-circuit copper sheet are respectively connected with two ends of any bolt; the neutral point bushing is grounded through a grounding wire; and the high-frequency sensor is respectively connected in series with the short-circuit copper sheet and the grounding wire. The ultrasonic sensors are arranged in the ascending flanged base and the transformer oil tank respectively, and the ultrasonic sensors in the transformer oil tank are distributed on the upper portion, the middle portion and the lower portion of the transformer oil tank. According to the power transformer, two kinds of partial discharge signals at different positions are collected, whether discharge occurs at different positions in the transformer or not is accurately judged in combination with a logic judgment method, the severity degree is judged, and therefore early warning or tripping instructions are accurately output at the initial stage of a fault to remove the fault, and operation safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a power transformer with active anti-explosion function and a monitoring method. Background Art

[0002] A power transformer is a static electrical device that is mainly used to convert an AC voltage (current) of a certain value into another or several different voltages (currents) of the same frequency. It works on the principle of electromagnetic induction and has two or more windings. It can convert the AC voltage and current of one system into the voltage and current of another system through electromagnetic induction at the same frequency. The power transformer plays a vital role in the power system. It can not only increase the voltage to transmit electrical energy to a distant power consumption area, but also reduce the voltage to meet the needs of various levels of use.

[0003] The protection technology of traditional power transformers mainly relies on electrical protection such as differential protection and current quick-break protection, as well as non-electrical protection such as gas relays and pressure relief valves. It is unable to eliminate the fault in the early stage of the fault and has a lag. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem that the power transformer protection technology in the prior art mainly relies on electrical quantity protection such as differential protection and current quick-break protection and non-electrical quantity protection such as gas relay and pressure relief valve, and is unable to eliminate the fault in the early stage of the fault and has a lag problem.

[0005] In order to solve the above technical problems, the present invention provides a power transformer with active anti-explosion function, comprising: Transformer oil tank; A lifting seat, the lifting seat is connected to the top of the transformer oil tank; A high-voltage bushing, one end of which is connected to an end of the elevation seat away from the transformer oil tank through a plurality of bolts; A short-circuit copper sheet, two ends of which are respectively connected to two ends of any of the bolts; A neutral point bushing, the neutral point bushing is connected to the top of the transformer oil tank, and the neutral point bushing is grounded through a grounding wire; A high-frequency sensor, the high-frequency sensor comprising a first high-frequency sensor and a second high-frequency sensor, the first high-frequency sensor being connected in series to the short-circuit copper sheet, and the second high-frequency sensor being connected in series to the ground wire; The ultrasonic sensor comprises a first ultrasonic sensor, a second ultrasonic sensor, a third ultrasonic sensor, a fourth ultrasonic sensor, a fifth ultrasonic sensor and a sixth ultrasonic sensor which are arranged in the transformer oil tank, wherein the first ultrasonic sensor is arranged on the lifting seat, the second ultrasonic sensor is arranged in the middle of the transformer oil tank, the third ultrasonic sensor and the fourth ultrasonic sensor are arranged near the top of the transformer oil tank and are symmetrically arranged on both sides of the second ultrasonic sensor, and the fifth ultrasonic sensor and the sixth ultrasonic sensor are arranged near the bottom of the transformer oil tank and are symmetrically arranged on both sides of the second ultrasonic sensor.

[0006] Preferably, it also includes a control unit, which is respectively connected to the first high-frequency sensor, the second high-frequency sensor, the first ultrasonic sensor, the second ultrasonic sensor, the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor and the sixth ultrasonic sensor, and the controller is used to receive real-time data monitored by each sensor, and output corresponding instructions after analyzing and processing these data.

[0007] Preferably, the transformer oil tank is a rectangular box structure, the second ultrasonic sensor is attached to the center position of a side surface of the transformer oil tank, and the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor and the sixth ultrasonic sensor are respectively attached to positions close to the four corners of this side surface.

[0008] Preferably, the bolts are epoxy resin bolts.

[0009] A monitoring method for real-time monitoring of the operating state of a power transformer with active anti-explosion function as described in any one of the above, comprising: Monitor the operating status of the riser and transformer tank: When monitoring the operating status of the lifting seat, When the first ultrasonic sensor detects a discharge amount greater than a first threshold value and less than a second threshold value, and at the same time, the first high-frequency sensor detects a discharge amount greater than a third threshold value and less than a fourth threshold value, outputting an alarm signal; If the first ultrasonic sensor detects a discharge amount greater than the second threshold value, and the first high-frequency sensor detects a discharge amount greater than the fourth threshold value, a delayed tripping instruction is output; during the delay period, if the discharge amount detected by the first ultrasonic sensor decreases to within the range from the first threshold value to the second threshold value, or the discharge amount detected by the first high-frequency sensor decreases to within the range from the third threshold value to the fourth threshold value, the tripping instruction is terminated and the alarm signal is continuously output; until the first ultrasonic sensor detects a discharge amount less than the first threshold value or the first high-frequency sensor detects a discharge amount less than the third threshold value, the transformer resumes normal operation; When monitoring the operating status of the transformer tank, When any one of the second ultrasonic sensor, the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor and the sixth ultrasonic sensor detects a discharge amount greater than the first threshold and less than the second threshold, and the second high-frequency sensor detects a discharge amount greater than the third threshold and less than the fourth threshold, an alarm signal is output; If the third ultrasonic sensor or the fourth ultrasonic sensor detects a discharge amount greater than the second threshold, and the discharge amount detected by the second high-frequency sensor is greater than the fourth threshold, it is determined that continuous partial discharge occurs in the upper position of the transformer oil tank, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the third ultrasonic sensor or the fourth ultrasonic sensor decreases to within the range from the first threshold to the second threshold, or the discharge amount detected by the second high-frequency sensor decreases to within the range from the third threshold to the fourth threshold, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the third ultrasonic sensor or the fourth ultrasonic sensor is less than the first threshold, or the discharge amount detected by the second high-frequency sensor is less than the third threshold, and the transformer resumes normal operation; If the second ultrasonic sensor detects a discharge amount greater than the second threshold value, and the discharge amount continues to increase to greater than the fifth threshold value, and at the same time the discharge amount detected by the second high-frequency sensor is greater than the fourth threshold value and continues to increase to greater than the sixth threshold value, it is determined that continuous partial discharge occurs in the middle position of the transformer oil tank, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the second ultrasonic sensor decreases to within the range of the first threshold value to the fifth threshold value, or the discharge amount detected by the second high-frequency sensor decreases to within the range of the third threshold value to the sixth threshold value, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the second ultrasonic sensor is less than the first threshold value, or the second high-frequency sensor detects that the discharge amount is less than the third threshold value, and the transformer resumes normal operation; If the fifth ultrasonic sensor or the sixth ultrasonic sensor detects a discharge amount greater than the second threshold, and the discharge amount continues to increase to greater than the seventh threshold, and at the same time the discharge amount monitored by the second high-frequency sensor is greater than the fourth threshold and continues to increase to greater than the eighth threshold, it is determined that continuous partial discharge occurs in the lower position of the transformer oil tank, and a delayed tripping instruction is output. During the delay period, if the discharge amount monitored by the third ultrasonic sensor or the fourth ultrasonic sensor decreases to within the range of the first threshold to the seventh threshold, or the discharge amount monitored by the second high-frequency sensor decreases to within the range of the third threshold to the eighth threshold, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount monitored by the third ultrasonic sensor or the fourth ultrasonic sensor is less than the first threshold, or the second high-frequency sensor detects that the discharge amount is less than the third threshold, and the transformer resumes normal operation.

[0010] Preferably, when the first ultrasonic sensor detects a discharge amount less than a first threshold, or when the first high-frequency sensor detects a discharge amount less than a third threshold, it is determined to be an external interference signal.

[0011] Preferably, when the second ultrasonic sensor, the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor, and the sixth ultrasonic sensor monitor a discharge amount less than the first threshold, or the second high-frequency sensor monitors a discharge amount less than the third threshold, it is determined to be an external interference signal.

[0012] Preferably, the seventh threshold is greater than the fifth threshold, and the eighth threshold is greater than the sixth threshold.

[0013] Preferably, the first threshold is 100mv, the second threshold is 400mv, the third threshold is 1000mv, the fourth threshold is 4000mv, the fifth threshold is 500mv, the sixth threshold is 5000mv, the seventh threshold is 600mv, and the eighth threshold is 10000mv.

[0014] Preferably, the delay period is between 0 and 20 seconds.

[0015] The above technical solution of the present invention has the following beneficial effects compared with the prior art: The power transformer and monitoring method with active anti-explosion function described in the present invention include a transformer oil tank, an elevation seat, a high-voltage bushing, a short-circuit copper sheet, a neutral point bushing, a high-frequency sensor and an ultrasonic sensor; the elevation seat and the neutral point bushing are respectively connected to the top of the transformer oil tank; one end of the high-voltage bushing is connected to the elevation seat by a bolt; the two ends of the short-circuit copper sheet are respectively connected to the two ends of any bolt; the neutral point bushing is grounded by a grounding wire; and the high-frequency sensor is connected in series to the short-circuit copper sheet and the grounding wire. The ultrasonic sensors are respectively arranged in the elevation seat and the transformer oil tank, and the ultrasonic sensors in the transformer oil tank are distributed at the upper, middle and lower parts thereof. The present invention provides an electric transformer with an active anti-explosion function. A high-frequency sensor and an ultrasonic sensor are arranged at different positions of the electric transformer. By collecting two local discharge signals at different positions, a logic judgment method is combined to accurately judge whether discharge occurs at different positions inside the transformer and judge the severity of the discharge. Thus, an early warning signal or a tripping instruction is accurately output at the early stage of a fault to eliminate the fault, thereby ensuring the safe operation of the transformer. At the same time, the local discharge anomaly caused by an external interference signal can be accurately identified, thereby reducing unnecessary signal output or manual intervention, and reducing operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein Figure 1 It is a schematic diagram of the overall structure of the power transformer with active anti-explosion function of the present invention; Figure 2 It is a structural schematic diagram of the connection position of the lifting seat and the high-voltage bushing of the power transformer with active anti-explosion function of the present invention.

[0017] Explanation of the reference numerals in the specification: 1. Transformer oil tank; 2. Rising seat; 3. High-voltage bushing; 4. Bolt; 5. Short-circuit copper sheet; 6. Neutral point bushing; 7. Grounding wire; 8. High-frequency sensor; 81. First high-frequency sensor; 82. Second high-frequency sensor; 9. Ultrasonic sensor; 91. First ultrasonic sensor; 92. Second ultrasonic sensor; 93. Third ultrasonic sensor; 94. Fourth ultrasonic sensor; 95. Fifth ultrasonic sensor; 96. Sixth ultrasonic sensor. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0019] Reference Figure 1 As shown, the present invention is a power transformer with active anti-explosion function, comprising Transformer oil tank 1; The lifting seat 2 is connected to the top of the transformer oil tank 1; A high-voltage bushing 3, one end of which is connected to an end of the elevation seat 2 away from the transformer oil tank 1 through a plurality of bolts 4; A short-circuited copper sheet 5, two ends of which are respectively connected to two ends of any bolt 4; A neutral point bushing 6, the neutral point bushing 6 is connected to the top of the transformer oil tank 1, and the neutral point bushing 6 is grounded through a grounding wire 7; The high-frequency sensor 8 includes a first high-frequency sensor 81 and a second high-frequency sensor 82. The first high-frequency sensor 81 is connected in series to the short-circuit copper sheet 5, and the second high-frequency sensor 82 is connected in series to the ground wire 7. Ultrasonic sensor 9, ultrasonic sensor 9 includes a first ultrasonic sensor 91, a second ultrasonic sensor 92, a third ultrasonic sensor 93, a fourth ultrasonic sensor 94, a fifth ultrasonic sensor 95 and a sixth ultrasonic sensor 96 arranged in the transformer oil tank, the first ultrasonic sensor 91 is arranged on the lifting seat 2, the second ultrasonic sensor 92 is arranged in the middle position of the transformer oil tank 1, the third ultrasonic sensor 93 and the fourth ultrasonic sensor 94 are arranged near the top of the transformer oil tank 1 and are symmetrically arranged on both sides of the second ultrasonic sensor 92, the fifth ultrasonic sensor 95 and the sixth ultrasonic sensor 96 are arranged near the bottom of the transformer oil tank 1 and are symmetrically arranged on both sides of the second ultrasonic sensor 92.

[0020] Specifically, the high-voltage bushing 3 and the transformer oil tank 1 are butt-jointed together by bolts 4, one end of the short-circuit copper sheet 5 is connected to the end of the bolt 4 connected to the high-voltage bushing 3, and the other end of the short-circuit copper sheet 5 is connected to the end of the bolt 4 connected to the riser 2, and the first high-frequency sensor 81 is connected in series in the short-circuit copper sheet 5 to detect the discharge signal inside the high-voltage bushing 3 and the riser 2. One end of the neutral point bushing 6 is connected to the transformer oil tank 1, and the other end is grounded through the grounding wire 7, and the second high-frequency sensor 82 is connected in series in the grounding wire 7 to detect the discharge signal inside the transformer oil tank 1.

[0021] Specifically, the first ultrasonic sensor is used to monitor the discharge signal and discharge position inside the lifting seat; the second ultrasonic sensor 92 is used to monitor the discharge signal on the middle winding of the transformer oil tank 1, the third ultrasonic sensor 93 and the fourth ultrasonic sensor 94 are used to monitor the discharge signal at the high-voltage end of the upper part of the transformer oil tank 1, and the fifth ultrasonic sensor 95 and the sixth ultrasonic sensor 96 are used to monitor the discharge signal at the low-voltage end of the lower part of the transformer oil tank 1, thereby determining the discharge position.

[0022] The present invention provides an electric transformer with active anti-explosion function, wherein a high-frequency sensor 8 and an ultrasonic sensor 9 are arranged at different positions of the electric transformer, and by collecting two kinds of local discharge signals at different positions, a logic judgment method is combined to accurately judge whether discharge occurs at different positions inside the transformer and judge the severity of the discharge, thereby accurately outputting a warning signal or a tripping instruction in the early stage of a fault to eliminate the fault, thereby ensuring the safe operation of the transformer, and at the same time being able to accurately identify local discharge anomalies caused by external interference signals, thereby reducing unnecessary signal output or manual intervention, and reducing operation and maintenance costs.

[0023] Furthermore, a control unit is also included, and the control unit is respectively connected to the first high-frequency sensor 81, the second high-frequency sensor 82, the first ultrasonic sensor 91, the second ultrasonic sensor 92, the third ultrasonic sensor 93, the fourth ultrasonic sensor 94, the fifth ultrasonic sensor 95, and the sixth ultrasonic sensor 96. Specifically, the control unit outputs corresponding signals and instructions according to the monitoring values ​​of each high-frequency sensor 8 and ultrasonic sensor 9.

[0024] Furthermore, the transformer oil tank 1 is a rectangular box structure, the second ultrasonic sensor 92 is attached to the center of one side of the transformer oil tank 1, and the third ultrasonic sensor 93, the fourth ultrasonic sensor 94, the fifth ultrasonic sensor 95 and the sixth ultrasonic sensor 96 are respectively attached to the positions near the four corners of the side. Specifically, the five ultrasonic sensors are distributed at five points to monitor the middle position of the oil tank and the positions near the four corners, and the monitoring area can cover the entire oil tank.

[0025] Furthermore, the bolts 4 are epoxy resin bolts. Embodiment 2

[0026] The present invention discloses a monitoring method for real-time monitoring of the operating state of a power transformer with an active anti-explosion function as in the first embodiment, comprising: Monitoring and determination process of the operation status of the lifting seat 2: When the first ultrasonic sensor 91 detects a discharge amount greater than 100mv and less than 400mv, and the first high-frequency sensor 81 detects a discharge amount greater than 1000mv and less than 4000mv, an alarm signal is output; After outputting the alarm signal, if the first ultrasonic sensor 91 detects a discharge amount greater than 400mv, and the first high-frequency sensor 81 detects a discharge amount greater than 4000mv, a delayed tripping instruction is output; during the delay period, if the discharge amount detected by the first ultrasonic sensor 91 decreases to within the range of 100mv to 400mv, or the discharge amount detected by the first high-frequency sensor 81 decreases to within the range of 1000mv to 4000mv, the tripping instruction is terminated and the alarm signal is continuously output; until the first ultrasonic sensor 91 detects a discharge amount less than 100mv or the first high-frequency sensor 81 detects a discharge amount less than 1000mv, the transformer resumes normal operation; Monitoring and determination process of transformer oil tank operating status: When any of the second ultrasonic sensor 92, the third ultrasonic sensor 93, the fourth ultrasonic sensor 94, the fifth ultrasonic sensor 95 and the sixth ultrasonic sensor 96 detects a discharge amount greater than 100mv and less than 400mv, and the second high-frequency sensor 82 detects a discharge amount greater than 1000mv and less than 4000mv, an alarm signal is output; If the third ultrasonic sensor 93 or the fourth ultrasonic sensor 94 detects a discharge amount greater than 400mv, and the discharge amount detected by the second high-frequency sensor 82 is greater than 4000mv, it is determined that continuous partial discharge occurs at the upper position of the transformer oil tank 1, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the third ultrasonic sensor 93 or the fourth ultrasonic sensor 94 decreases to within the range of 100mv to 400mv, or the discharge amount detected by the second high-frequency sensor 82 decreases to within the range of 1000mv to 4000mv, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the third ultrasonic sensor 93 or the fourth ultrasonic sensor 94 is less than 100mv, or the discharge amount detected by the second high-frequency sensor 82 is less than 1000mv, and the transformer resumes normal operation; If the second ultrasonic sensor 92 detects a discharge amount greater than 400mv, and the discharge amount continues to increase to greater than 500mv, and at the same time the discharge amount detected by the second high-frequency sensor 82 is greater than 4000mv and continues to increase to greater than 5000mv, it is determined that continuous partial discharge occurs in the middle position of the transformer oil tank 1, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the second ultrasonic sensor 92 decreases to within the range of 400mv to 500mv, or the discharge amount detected by the second high-frequency sensor 82 decreases to within the range of 1000mv to 5000mv, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the second ultrasonic sensor 92 is less than 100mv, or the discharge amount detected by the second high-frequency sensor 82 is less than 1000mv, and the transformer resumes normal operation; If the fifth ultrasonic sensor 95 or the sixth ultrasonic sensor 96 detects a discharge amount greater than 400mv, and the discharge amount continues to increase to greater than 600mv, and at the same time the discharge amount detected by the second high-frequency sensor 82 is greater than 4000mv and continues to increase to greater than 10000mv, it is determined that continuous partial discharge occurs in the lower position of the transformer oil tank 1, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the third ultrasonic sensor 93 or the fourth ultrasonic sensor 94 decreases to within the range of 100mv to 600mv, or the discharge amount detected by the second high-frequency sensor 82 decreases to within the range of 1000mv to 10000mv, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the third ultrasonic sensor 93 or the fourth ultrasonic sensor 94 is less than 100mv, or the second high-frequency sensor 82 detects that the discharge amount is less than 1000mv, and the transformer resumes normal operation.

[0027] Further, when the first ultrasonic sensor 91 detects a discharge amount less than the first threshold, or the first high-frequency sensor 81 detects a discharge amount less than the third threshold, it is determined to be an external interference signal.

[0028] Furthermore, when the second ultrasonic sensor 92, the third ultrasonic sensor 93, the fourth ultrasonic sensor 94, the fifth ultrasonic sensor 95, and the sixth ultrasonic sensor 96 detect a discharge amount less than the first threshold, or the second high-frequency sensor 82 detects a discharge amount less than the third threshold, it is determined to be an external interference signal.

[0029] Furthermore, the seventh threshold is greater than the fifth threshold, and the eighth threshold is greater than the sixth threshold.

[0030] Furthermore, the delay period is between 0 and 20 seconds, and the extension time can be selected according to actual needs.

[0031] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A power transformer with active explosion-proof function, comprising: Transformer oil tank; A lifting seat, the lifting seat is connected to the top of the transformer oil tank; A high-voltage bushing, one end of which is connected to an end of the elevation seat away from the transformer oil tank through a plurality of bolts; A short-circuit copper sheet, two ends of which are respectively connected to two ends of any of the bolts; A neutral point bushing, the neutral point bushing is connected to the top of the transformer oil tank, and the neutral point bushing is grounded through a grounding wire; A high-frequency sensor, the high-frequency sensor comprising a first high-frequency sensor and a second high-frequency sensor, the first high-frequency sensor being connected in series to the short-circuit copper sheet, and the second high-frequency sensor being connected in series to the ground wire; The ultrasonic sensor comprises a first ultrasonic sensor, a second ultrasonic sensor, a third ultrasonic sensor, a fourth ultrasonic sensor, a fifth ultrasonic sensor and a sixth ultrasonic sensor which are arranged in the transformer oil tank, wherein the first ultrasonic sensor is arranged on the lifting seat, the second ultrasonic sensor is arranged in the middle of the transformer oil tank, the third ultrasonic sensor and the fourth ultrasonic sensor are arranged near the top of the transformer oil tank and are symmetrically arranged on both sides of the second ultrasonic sensor, and the fifth ultrasonic sensor and the sixth ultrasonic sensor are arranged near the bottom of the transformer oil tank and are symmetrically arranged on both sides of the second ultrasonic sensor.

2. The power transformer with active anti-explosion function according to claim 1 is characterized in that: It also includes a control unit, which is respectively connected to the first high-frequency sensor, the second high-frequency sensor, the first ultrasonic sensor, the second ultrasonic sensor, the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor and the sixth ultrasonic sensor. The controller is used to receive real-time data monitored by each sensor, and output corresponding instructions after analyzing and processing these data.

3. The power transformer with active anti-explosion function according to claim 1 is characterized in that: The transformer oil tank is a rectangular box structure, the second ultrasonic sensor is attached to the center position of one side of the transformer oil tank, and the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor and the sixth ultrasonic sensor are respectively attached to positions close to the four corners of this side.

4. The power transformer with active anti-explosion function according to claim 1, characterized in that: The bolts are epoxy resin bolts.

5. A monitoring method for real-time monitoring of the operating state of the power transformer with active anti-explosion function according to any one of claims 1 to 4, characterized in that: include, Monitor the operating status of the riser and transformer tank: When monitoring the operating status of the lifting seat, When the first ultrasonic sensor detects a discharge amount greater than a first threshold value and less than a second threshold value, and at the same time, the first high-frequency sensor detects a discharge amount greater than a third threshold value and less than a fourth threshold value, outputting an alarm signal; If the first ultrasonic sensor detects a discharge amount greater than the second threshold value, and the first high-frequency sensor detects a discharge amount greater than the fourth threshold value, a delayed tripping instruction is output; during the delay period, if the discharge amount detected by the first ultrasonic sensor decreases to within the range from the first threshold value to the second threshold value, or the discharge amount detected by the first high-frequency sensor decreases to within the range from the third threshold value to the fourth threshold value, the tripping instruction is terminated and the alarm signal is continuously output; until the first ultrasonic sensor detects a discharge amount less than the first threshold value or the first high-frequency sensor detects a discharge amount less than the third threshold value, the transformer resumes normal operation; When monitoring the operating status of the transformer tank, When any one of the second ultrasonic sensor, the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor and the sixth ultrasonic sensor detects a discharge amount greater than the first threshold and less than the second threshold, and the second high-frequency sensor detects a discharge amount greater than the third threshold and less than the fourth threshold, an alarm signal is output; If the third ultrasonic sensor or the fourth ultrasonic sensor detects a discharge amount greater than the second threshold, and the discharge amount detected by the second high-frequency sensor is greater than the fourth threshold, it is determined that continuous partial discharge occurs in the upper position of the transformer oil tank, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the third ultrasonic sensor or the fourth ultrasonic sensor decreases to within the range from the first threshold to the second threshold, or the discharge amount detected by the second high-frequency sensor decreases to within the range from the third threshold to the fourth threshold, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the third ultrasonic sensor or the fourth ultrasonic sensor is less than the first threshold, or the discharge amount detected by the second high-frequency sensor is less than the third threshold, and the transformer resumes normal operation; If the second ultrasonic sensor detects a discharge amount greater than the second threshold value, and the discharge amount continues to increase to greater than the fifth threshold value, and at the same time the discharge amount detected by the second high-frequency sensor is greater than the fourth threshold value and continues to increase to greater than the sixth threshold value, it is determined that continuous partial discharge occurs in the middle position of the transformer oil tank, and a delayed tripping instruction is output. During the delay period, if the discharge amount detected by the second ultrasonic sensor decreases to within the range of the first threshold value to the fifth threshold value, or the discharge amount detected by the second high-frequency sensor decreases to within the range of the third threshold value to the sixth threshold value, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount detected by the second ultrasonic sensor is less than the first threshold value, or the second high-frequency sensor detects that the discharge amount is less than the third threshold value, and the transformer resumes normal operation; If the fifth ultrasonic sensor or the sixth ultrasonic sensor detects a discharge amount greater than the second threshold, and the discharge amount continues to increase to greater than the seventh threshold, and at the same time the discharge amount monitored by the second high-frequency sensor is greater than the fourth threshold and continues to increase to greater than the eighth threshold, it is determined that continuous partial discharge occurs in the lower position of the transformer oil tank, and a delayed tripping instruction is output. During the delay period, if the discharge amount monitored by the third ultrasonic sensor or the fourth ultrasonic sensor decreases to within the range of the first threshold to the seventh threshold, or the discharge amount monitored by the second high-frequency sensor decreases to within the range of the third threshold to the eighth threshold, the tripping instruction is terminated and the alarm signal is continuously output until the discharge amount monitored by the third ultrasonic sensor or the fourth ultrasonic sensor is less than the first threshold, or the second high-frequency sensor detects that the discharge amount is less than the third threshold, and the transformer resumes normal operation.

6. The monitoring method according to claim 5, characterized in that: When the first ultrasonic sensor detects a discharge amount less than a first threshold, or the first high-frequency sensor detects a discharge amount less than a third threshold, it is determined to be an external interference signal.

7. The monitoring method according to claim 5, characterized in that: When the second ultrasonic sensor, the third ultrasonic sensor, the fourth ultrasonic sensor, the fifth ultrasonic sensor, and the sixth ultrasonic sensor detect a discharge amount less than the first threshold, or the second high-frequency sensor detects a discharge amount less than the third threshold, it is determined to be an external interference signal.

8. The monitoring method according to claim 5, characterized in that: The seventh threshold is greater than the fifth threshold, and the eighth threshold is greater than the sixth threshold.

9. The monitoring method according to claim 5, characterized in that: The first threshold is 100mv, the second threshold is 400mv, the third threshold is 1000mv, the fourth threshold is 4000mv, the fifth threshold is 500mv, the sixth threshold is 5000mv, the seventh threshold is 600mv, and the eighth threshold is 10000mv.

10. The monitoring method according to claim 5, characterized in that: The delay period is between 0-20 seconds.

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