Electronic transformer fault diagnosis analyzer and fault diagnosis analysis method
By designing an electronic instrument transformer fault diagnosis and analysis instrument, and utilizing laser power supply and signal acquisition modules for multi-directional detection, the problem of difficult fault diagnosis of electronic instrument transformers has been solved, and operation and maintenance efficiency has been improved.
Patent Information
- Application Number
- CN202510975473.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-12-05
AI Technical Summary
In existing technologies, fault diagnosis of electronic instrument transformers is difficult, operation and maintenance efficiency is low, and there is a lack of dedicated fault diagnosis and analysis instruments, which affects maintenance efficiency.
An electronic instrument transformer fault diagnosis and analysis instrument was designed, including a laser power supply module, a signal acquisition and transmission module, a line detection module, and a main control module. Through laser power supply, signal acquisition, and line detection, combined with feedback adjustment of the main control module, multi-directional fault detection and location can be achieved.
It improves the efficiency of testing and maintenance of electronic instrument transformers, simplifies the fault diagnosis process, and enhances maintenance efficiency.
Smart Images
Figure CN121069294A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of mutual inductor detection operation and maintenance, in particular to an electronic mutual inductor fault diagnosis analyzer and a fault diagnosis method. BACKGROUND
[0002] Compared with the traditional electromagnetic current transformer, the electronic mutual inductor has simple insulation structure, digitized output, easy integration, energy saving and environmental protection, and price advantage in high voltage level, and has been widely used in DC ultra-high voltage converter station, and has the condition of being applied to AC substation. However, compared with the traditional current transformer, the electronic mutual inductor has a high failure rate, mainly due to measurement inaccuracy, laser power failure, and merging unit failure.
[0003] In the traditional operation and maintenance mode, when a fault occurs, a replacement method is used, for example, when the merging unit has no signal output, it is difficult to determine whether it is a remote module, a transmission optical fiber (including optical fiber insulator), a link optical fiber joint or a merging unit board fault. First, the standby optical fiber is replaced with the optical fiber (2 optical fibers for power supply and communication) of the main circuit to determine whether the optical fiber is damaged. After determining that the optical path and the remote module are not faulty, a new merging unit is replaced to determine whether the merging unit board is faulty. However, the related data in this process can only be read by the ows background, and the operation and maintenance is extremely inconvenient. There is a lack of a special fault diagnosis analyzer in the prior art, which seriously affects the maintenance efficiency. SUMMARY
[0004] The purpose of the embodiment of the present application is to provide an electronic mutual inductor fault diagnosis analyzer and a fault diagnosis method, which can improve the detection and operation and maintenance efficiency.
[0005] In order to achieve the above purpose, the electronic mutual inductor fault diagnosis analyzer provided by the embodiment of the present application comprises: A laser power supply module for emitting laser to the electronic mutual inductor to be tested for power supply; A signal acquisition and sending module for connecting with the signal input and output interface of the electronic mutual inductor to be tested to receive the output signal of the electronic mutual inductor and output the signal to the electronic mutual inductor; A line detection module for connecting with the signal input and output interface to determine the state of the signal input and output interface; A main control module connected with the laser power supply module, the signal acquisition and sending module, and the line detection module to feedback and adjust according to the feedback signals of the laser power supply module, the signal acquisition and sending module, and the line detection module.
[0006] Optionally, the line detection module comprises: an optical amplifier for amplifying the fiber end face; a camera for shooting the amplified fiber end face.
[0007] Optionally, the laser power supply module comprises: a laser generator for emitting laser; a coupler arranged at the front end of the laser generator for splitting the emitted laser; an output fiber connected with one output end of the coupler for outputting the split larger power laser; a feedback fiber connected with another output end of the coupler for outputting the split smaller power laser; a first photodetector connected with the feedback fiber for receiving and detecting the smaller power laser.
[0008] Optionally, the main control module is connected with the first photodetector for calculating the power of the laser emitted by the laser generator according to the smaller power laser.
[0009] Optionally, the fault diagnosis analyzer further comprises a laser power detection module comprising a second photodetector for detecting the laser power.
[0010] In another aspect, the present application also provides an electronic mutual inductor fault diagnosis analysis method for controlling an electronic mutual inductor fault diagnosis analyzer, wherein the fault diagnosis analyzer comprises: a laser power supply module for emitting laser to the electronic mutual inductor to be tested for power supply; a signal acquisition and sending module for connecting with the signal input and output interfaces of the electronic mutual inductor to be tested to receive the output signal of the electronic mutual inductor and output signal to the electronic mutual inductor; a line detection module for connecting with the signal input and output interfaces to determine the state of the signal input and output interfaces; a main control module connected with the laser power supply module, signal acquisition and sending module, and line detection module to perform feedback adjustment according to the feedback signals of the laser power supply module, signal acquisition and sending module, and line detection module; The fault diagnosis analysis method comprises: controlling the laser power supply module to emit laser to the electronic mutual inductor to be tested for power supply; receiving the output signal of the electronic mutual inductor collected by the signal acquisition and sending module; judging whether the electronic mutual inductor appears abnormal according to the output signal; In a case where it is determined that the electronic transformer does not have an abnormality, it is determined that the electronic transformer is normal.
[0011] Optionally, the line detection module comprises: An optical amplifier configured to amplify the end face of the optical fiber; A camera configured to capture the amplified end face of the optical fiber; Determining whether the electronic transformer has an abnormality according to the output signal comprises: Detecting the end face of the optical fiber through the optical amplifier and the camera; Determining whether the end face of the optical fiber is dirty; In a case where it is determined that the end face of the optical fiber is dirty, it is determined that the electronic transformer has an optical fiber end face dirty abnormality.
[0012] Optionally, the laser power supply module comprises: A laser generator configured to emit laser; A coupler disposed at the front end of the laser generator and configured to split the emitted laser; An output optical fiber connected to one output end of the coupler and configured to output the split larger-power laser; A feedback optical fiber connected to another output end of the coupler and configured to output the split smaller-power laser; A first photodetector connected to the feedback optical fiber and configured to receive and detect the smaller-power laser; Determining whether the electronic transformer has an abnormality according to the output signal further comprises: In a case where it is determined that the end face of the optical fiber is not dirty, detecting the smaller-power laser through the first photodetector; Calculating the power of the laser emitted by the laser generator according to the smaller-power laser; Obtaining the power of the laser actually received by the electronic transformer to be measured through the signal acquisition and sending module; Calculating the energy transmission conversion efficiency according to the power of the laser emitted by the laser generator and the power of the laser actually received by the electronic transformer; Determining whether the energy transmission conversion efficiency is less than a preset efficiency threshold; In a case where it is determined that the energy transmission conversion efficiency is less than the efficiency threshold, it is determined that the electronic transformer has an optical fiber transmission loss too large abnormality.
[0013] Optionally, the main control module is connected to the first photodetector and configured to calculate the power of the laser emitted by the laser generator according to the smaller-power laser; According to the output signal, it is judged whether the electronic transformer is abnormal, and the method further comprises: In the case that the energy transmission conversion efficiency is greater than or equal to the efficiency threshold, a state signal of a remote module of the electronic transformer is acquired according to the signal acquisition and sending module; According to the state signal, it is judged whether the remote module is abnormal; In the case that the remote module is abnormal, it is determined that the electronic transformer is abnormal in the remote module; In the case that the remote module is not abnormal, a signal is simulated to be sent from the remote module to a merging unit of the electronic transformer through the signal acquisition and sending module; The state of the merging unit is monitored; It is judged whether the merging unit can normally receive the signal; In the case that the merging unit cannot normally receive the signal, it is judged that the electronic transformer is abnormal in communication of the merging unit.
[0014] Optionally, the fault diagnosis analyzer further comprises a laser power detection module, and the laser power detection module comprises a second photodetector configured to detect laser power; According to the output signal, it is judged whether the electronic transformer is abnormal, and the method further comprises: In the case that the merging unit can normally receive the signal, laser power output by the merging unit is detected through the second photodetector; It is judged whether the laser power output by the merging unit is less than a preset power threshold; In the case that the laser power output by the merging unit is less than the power threshold, it is determined that the electronic transformer is abnormal in failure of a laser of the merging unit.
[0015] Through the above technical solution, the electronic transformer fault diagnosis analyzer and the fault diagnosis analysis method provided by the present application supply power to the electronic transformer through a laser power supply module, acquire and send signals of the electronic transformer through a signal acquisition and sending module, detect line faults through a line detection module, and then, in combination with a main control module connected with each module, the electronic transformer is detected and fault located in multiple directions through the acquired signals, so that the detection and operation and maintenance efficiency is improved.
[0016] Other features and advantages of the embodiments of the present application will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain embodiments of the application, but are not intended to limit the present application in any manner. In the drawings: Figure 1 is a schematic diagram of an electronic transformer fault diagnosis analyzer according to an embodiment of the present application; Figure 2 is a schematic diagram of an electronic transformer according to an embodiment of the present application; Figure 3 is a flow chart of an electronic transformer fault diagnosis analysis method according to an embodiment of the present application; Figure 4 is a flow chart of a method of determining whether an electronic transformer is abnormal according to an output signal in an electronic transformer fault diagnosis analysis method according to an embodiment of the present application. DETAILED DESCRIPTION
[0018] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application in any manner.
[0019] As shown in Figure 1 is a schematic diagram of an electronic transformer fault diagnosis analyzer according to an embodiment of the present application. In this Figure 1 , the fault diagnosis analyzer can include a laser power supply module, a signal acquisition and sending module, a line detection module, and a main control module. The laser power supply module can be used to emit laser to the electronic transformer to be tested for power supply, the signal acquisition and sending module can be used to connect with the signal input and output interface of the electronic transformer to be tested to receive the output signal of the electronic transformer and output the signal to the electronic transformer. The line detection module can be used to connect with the signal input and output interface to determine the state of the signal input and output interface. The main control module can be connected with the laser power supply module, the signal acquisition and sending module, and the line detection module to perform feedback adjustment according to the feedback signals of the laser power supply module, the signal acquisition and sending module, and the line detection module.
[0020] In this embodiment, the specific form of the line detection module can be various known by those skilled in the art. In a preferred example of the present application, the line detection module can include an optical amplifier and a camera. The optical amplifier can be used to amplify the end face of the optical fiber, and the camera can be used to take a picture of the amplified end face of the optical fiber.
[0021] In this embodiment, the specific form of the laser power supply module can be various as known by those skilled in the art. In a preferred example of the present application, the laser power supply module can include a laser generator, a coupler, an output optical fiber, a feedback optical fiber and a first photoelectric detector. The laser generator can be used to emit laser, the coupler can be arranged at the front end of the laser generator to split the emitted laser. The output optical fiber can be connected with one output end of the coupler to output the split larger power laser. The feedback optical fiber can be connected with another output end of the coupler to output the split smaller power laser, and the first photoelectric detector can be connected with the feedback optical fiber to receive and detect the smaller power laser.
[0022] In order to calculate the power of the laser emitted by the laser generator according to the smaller power laser, in an embodiment of the present application, the master control module can be connected with the first photoelectric detector to calculate the power of the laser emitted by the laser generator according to the smaller power laser.
[0023] In order to detect the power of the laser emitted by the electronic transformer, in an embodiment of the present application, the fault diagnosis analyzer can further include a laser power detection module including a second photoelectric detector for detecting the laser power.
[0024] As Figure 2 shown is a schematic diagram of an electronic transformer according to an embodiment of the present application. In this Figure 2 embodiment, the existing electronic transformer can include a hollow coil, a shunt, a remote module, an optical fiber insulator and a merging unit. The shunt is used to measure the direct current, and the hollow coil is used to measure the harmonic current. The remote module is connected with the hollow coil and the shunt to receive and process the output signals of the shunt and the hollow coil and output serial digital optical signals. The working power of a plurality of independent remote modules is respectively provided by a laser in the merging unit located in the control room, each remote module is connected with the merging unit through two optical fibers (data and power supply), and the reliability of the laser and the optical fiber is crucial to the normal operation of the electronic transformer. The optical fiber insulator is a composite insulator with embedded optical fiber.
[0025] On the other hand, the present invention also provides a method for fault diagnosis and analysis of electronic instrument transformers, used to control an electronic instrument transformer fault diagnosis analyzer. The fault diagnosis analyzer may include a laser power supply module, a signal acquisition and transmission module, a line detection module, and a main control module. The laser power supply module can be used to emit a laser to power the electronic instrument transformer under test. The signal acquisition and transmission module can be connected to the signal input and output interfaces of the electronic instrument transformer under test to receive the output signals of the electronic instrument transformer and output signals to the electronic instrument transformer. The line detection module can be connected to the signal input and output interfaces to determine the status of the signal input and output interfaces. The main control module can be connected to the laser power supply module, the signal acquisition and transmission module, and the line detection module to perform feedback adjustment based on the feedback signals from the laser power supply module, the signal acquisition and transmission module, and the line detection module.
[0026] In this embodiment, the specific form of the line detection module can be various that are known to those skilled in the art. In a preferred example of the present invention, the line detection module may include an optical amplifier and a camera. The optical amplifier can be used to magnify the fiber end face, and the camera can be used to capture the magnified fiber end face.
[0027] In this embodiment, the specific form of the laser power supply module can be various as known to those skilled in the art. In a preferred example of the present invention, the laser power supply module may include a laser generator, a coupler, an output optical fiber, a feedback optical fiber, and a first photodetector. The laser generator is used to emit a laser beam, and the coupler can be disposed at the front end of the laser generator to split the emitted laser beam. The output optical fiber can be connected to one output end of the coupler to output the higher-power laser beam split from the coupler. The feedback optical fiber can be connected to the other output end of the coupler to output the lower-power laser beam split from the coupler, and the first photodetector can be connected to the feedback optical fiber to receive and detect the lower-power laser beam.
[0028] In order to calculate the power of the laser emitted by the laser generator based on the lower power laser, in one embodiment of the present invention, the main control module can be connected to a first photodetector for calculating the power of the laser emitted by the laser generator based on the lower power laser.
[0029] In order to detect the power of the laser emitted by the electronic current transformer, in one embodiment of the present invention, the fault diagnosis analyzer may further include a laser power detection module, which includes a second photodetector for detecting the laser power.
[0030] like Figure 3 The diagram shows a flowchart of an electronic instrument transformer fault diagnosis and analysis method according to an embodiment of the present invention.Figure 3 The fault diagnosis and analysis method may include the following steps: In step S1, the laser power supply module is controlled to emit a laser to the electronic current transformer under test to provide power. In step S2, the output signal of the electronic instrument transformer is received by the signal acquisition and transmission module; In step S3, the output signal is used to determine whether the electronic current transformer is malfunctioning. In step S4, if it is determined that the electronic instrument transformer is not malfunctioning, the electronic instrument transformer is confirmed to be normal. In step S5, if it is determined that the electronic current transformer is abnormal, the abnormality of the electronic current transformer is confirmed.
[0031] In Figure 3 In the illustrated steps, step S3 can be used to determine whether the electronic instrument transformer is malfunctioning based on the output signal. In this embodiment, the method for determining whether the electronic instrument transformer is malfunctioning based on the output signal can be of various forms known to those skilled in the art. In a preferred embodiment of the present invention, the method for determining whether the electronic instrument transformer is malfunctioning based on the output signal may include, for example... Figure 4 The steps are shown. In this Figure 4 In this context, a method for determining whether an electronic instrument transformer is malfunctioning based on its output signal may include the following steps: In step S301, the fiber end face is detected by an optical amplifier and a camera; In step S302, it is determined whether there is dirt on the fiber end face; In step S303, if it is determined that there is dirt on the fiber end face, it is determined that the electronic current transformer has an abnormality of dirt on the fiber end face. In step S304, if it is determined that there is no dirt on the fiber end face, a low-power laser is detected by the first photodetector; In step S305, the power of the laser emitted by the laser generator is calculated based on the lower power laser. In step S306, the power of the laser actually received by the electronic current transformer under test is obtained through the signal acquisition and transmission module; In step S307, the energy transfer conversion efficiency is calculated based on the power of the laser emitted by the laser generator and the power of the laser actually received by the electronic current transformer. In step S308, it is determined whether the energy transmission conversion efficiency is less than a preset efficiency threshold. In step S309, if the energy transmission conversion efficiency is less than the efficiency threshold, it is determined that the electronic instrument transformer has an abnormality of excessive fiber optic transmission loss. In step S310, in the case that the energy transmission conversion efficiency is greater than or equal to the efficiency threshold value, the state signal of the remote module of the electronic transformer is acquired according to the signal acquisition and sending module; In step S311, whether the remote module is abnormal is judged according to the state signal; In step S312, in the case that the remote module is abnormal, it is determined that the electronic transformer has the remote module abnormality; In step S313, in the case that the remote module is not abnormal, the signal acquisition and sending module is used to simulate the remote module to send the signal to the merging unit of the electronic transformer; In step S314, the state of the merging unit is monitored; In step S315, whether the merging unit can normally receive the signal is judged; In step S316, in the case that the merging unit cannot normally receive the signal, it is judged that the electronic transformer has the merging unit communication abnormality; In step S317, in the case that the merging unit can normally receive the signal, the laser power output by the merging unit is detected by the second photoelectric detector; In step S318, whether the laser power output by the merging unit is less than the preset power threshold value is judged; In step S319, in the case that the laser power output by the merging unit is less than the power threshold value, it is determined that the electronic transformer has the merging unit laser failure abnormality.
[0032] Through the above technical scheme, the electronic transformer fault diagnosis analyzer and the fault diagnosis analysis method provided by the application supply power to the electronic transformer through the laser power supply module, acquire and send the signal of the electronic transformer through the signal acquisition and sending module, detect the line fault through the line detection module, and then combine the main control module connected with each module to detect and locate the fault of the electronic transformer from multiple aspects through the acquired signal, so that the detection and operation efficiency is improved.
[0033] Those skilled in the art should understand that the embodiments of the application can be provided as a method, a system, or a computer program product. Therefore, the application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
[0034] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 means for functionally implementing the steps in the flowchart block or blocks
[0035] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 means for functionally implementing the steps in the flowchart block or blocks
[0036] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 means for functionally implementing the steps in the flowchart block or blocks
[0037] In one typical configuration, the computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.
[0038] The memory can include non-persistent memory and / or volatile memory, such as random access memory (RAM) and / or cache memory, for storing instructions and data. The memory can also include non-volatile memory, such as read only memory (ROM), electrically programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), flash memory, or other non-volatile memory. The memory can be a memory of a computer-readable medium.
[0039] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.
[0040] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.
[0041] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.
Claims
1. An electronic transformer fault diagnostic analyzer characterized by, The fault diagnosis analyzer comprises: A laser power supply module for emitting laser to the electronic transformer under test for power supply; A signal acquisition and sending module for connecting with the signal input and output interfaces of the electronic transformer under test to receive the output signal of the electronic transformer and output signal to the electronic transformer; A line detection module for connecting with the signal input and output interfaces to determine the state of the signal input and output interfaces; A main control module connected with the laser power supply module, the signal acquisition and sending module and the line detection module to perform feedback adjustment according to the feedback signals of the laser power supply module, the signal acquisition and sending module and the line detection module.
2. The fault diagnostic analyzer of claim 1, wherein, The line detection module comprises: An optical amplifier for amplifying the end face of the optical fiber; A camera for shooting the amplified end face of the optical fiber.
3. The fault diagnostic analyzer of claim 1, wherein, The laser power supply module comprises: A laser generator for emitting laser; A coupler arranged at the front end of the laser generator for splitting the emitted laser; An output optical fiber connected with one output end of the coupler for outputting the split laser with larger power; A feedback optical fiber connected with the other output end of the coupler for outputting the split laser with smaller power; A first photodetector connected with the feedback optical fiber for receiving and detecting the laser with smaller power.
4. The fault diagnostic analyzer of claim 3, wherein, The main control module is connected with the first photodetector for calculating the power of the laser emitted by the laser generator according to the laser with smaller power.
5. The fault diagnostic analyzer of claim 1, wherein, The fault diagnosis analyzer further comprises a laser power detection module comprising a second photodetector for detecting the power of the laser.
6. An electronic transformer fault diagnostic analysis method characterized by, A method for controlling an electronic transformer fault diagnosis analyzer, wherein the fault diagnosis analyzer comprises: A laser power supply module for emitting laser to the electronic transformer under test for power supply; A signal acquisition and sending module for connecting with the signal input and output interfaces of the electronic transformer under test to receive the output signal of the electronic transformer and output signal to the electronic transformer; A line detection module for connecting with the signal input and output interfaces to determine the state of the signal input and output interfaces; A main control module connected with the laser power supply module, the signal acquisition and sending module and the line detection module to perform feedback adjustment according to the feedback signals of the laser power supply module, the signal acquisition and sending module and the line detection module. The fault diagnosis method comprises: Controlling the laser power supply module to emit laser to the electronic transformer under test for power supply; Receiving the output signal of the electronic transformer collected by the signal acquisition and sending module; Judging whether the electronic transformer is abnormal according to the output signal; In the case where it is judged that the electronic transformer is not abnormal, determining that the electronic transformer is normal.
7. The failure diagnostic analysis method according to claim 6, characterized by, The line detection module comprises: An optical amplifier for amplifying the end face of the optical fiber; A camera for shooting the amplified end face of the optical fiber; Judging whether the electronic transformer is abnormal according to the output signal comprises: Detecting the end face of the optical fiber through the optical amplifier and the camera; Judging whether the end face of the optical fiber is dirty or not; In the case that the end face of the optical fiber is dirty, determining that the electronic transformer has the abnormality of dirty end face of the optical fiber.
8. The failure diagnostic analysis method according to claim 7, characterized by, The laser power supply module comprises: a laser generator for emitting laser; a coupler arranged at the front end of the laser generator for splitting the emitted laser; an output optical fiber connected with one output end of the coupler for outputting the split laser with larger power; a feedback optical fiber connected with another output end of the coupler for outputting the split laser with smaller power; a first photoelectric detector connected with the feedback optical fiber for receiving and detecting the laser with smaller power; According to the output signal, judging whether the electronic transformer has an abnormality, further comprising: In the case that the end face of the optical fiber is not dirty, detecting the laser with smaller power through the first photoelectric detector; According to the laser with smaller power, calculating the power of the laser emitted by the laser generator; Through the signal acquisition and sending module, acquiring the power of the laser actually received by the electronic transformer to be tested; According to the power of the laser emitted by the laser generator and the power of the laser actually received by the electronic transformer, calculating the energy transmission conversion efficiency; Judging whether the energy transmission conversion efficiency is less than a preset efficiency threshold value; In the case that the energy transmission conversion efficiency is less than the efficiency threshold value, determining that the electronic transformer has the abnormality of too large optical fiber transmission loss.
9. The failure diagnostic analysis method according to claim 8, characterized by, The main control module is connected with the first photoelectric detector for calculating the power of the laser emitted by the laser generator according to the laser with smaller power; According to the output signal, judging whether the electronic transformer has an abnormality, further comprising: In the case that the energy transmission conversion efficiency is greater than or equal to the efficiency threshold value, acquiring the state signal of the remote module of the electronic transformer according to the signal acquisition and sending module; According to the state signal, judging whether the remote module has an abnormality; In the case that the remote module has an abnormality, determining that the electronic transformer has the abnormality of the remote module; In the case that the remote module has no abnormality, simulating the signal sent by the remote module to the merging unit of the electronic transformer through the signal acquisition and sending module; Monitoring the state of the merging unit; Judging whether the merging unit can normally receive the signal; In the case that the merging unit cannot normally receive the signal, judging that the electronic transformer has the communication abnormality of the merging unit.
10. The failure diagnostic analysis method according to claim 9, characterized by, The fault diagnosis analyzer further comprises a laser power detection module, and the laser power detection module comprises a second photoelectric detector for detecting the power of the laser; According to the output signal, judging whether the electronic transformer has an abnormality, further comprising: In the case that the merging unit can normally receive the signal, detecting the power of the laser output by the merging unit through the second photoelectric detector; Judging whether the power of the laser output by the merging unit is less than a preset power threshold value; In a case where it is judged that the laser power output by the merging unit is less than the power threshold value, it is determined that the electronic mutual inductor has a merging unit laser failure anomaly.