Multi-dimensional online signal acquisition method for main transformer of gas turbine power plant

Abstract

The invention discloses a gas turbine power plant main transformer multi-dimensional online signal acquisition method, and belongs to the field of main transformers. The invention discloses a gas turbine power plant main transformer multi-dimensional online signal acquisition method. The method comprises the following steps: 1, obtaining a vibration signal of a main transformer; 2, obtaining a temperature signal of the main transformer; step 3, obtaining voltage and current signals; 4, analyzing the performance of the main transformer; and 5, evaluating electromagnetic interference and potential faults in the main transformer. The problem that the running state of the main transformer cannot be comprehensively monitored when the main transformer is monitored due to the fact that only the vibration noise can be monitored in the prior art is solved, the running state of the main transformer can be comprehensively evaluated from different angles by monitoring the multi-dimensional signals of the main transformer, and the monitoring accuracy of the main transformer is improved. Potential problems can be found in time, reliability and safety of a power system are improved, real-time operation state information of the main transformer is provided for a user, and therefore maintenance and management can be better carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of main transformers, and in particular to a multi-dimensional online signal acquisition method for a main transformer of a gas turbine power plant. Background Art

[0002] The capacity of the main transformer is generally large, and it is required to work with high reliability. Once a failure occurs, it will cause significant losses. At the very least, it may cause a main transformer failure; at the worst, it may cause a fire, endangering normal transportation safety. Therefore, the main transformer needs to be monitored.

[0003] A Chinese patent with publication number CN115839763A discloses a main transformer vibration and noise monitoring system, comprising: a main transformer signal acquisition module, a signal conditioning module, a data acquisition module, and a data processing module connected in sequence; the main transformer signal acquisition module comprises a piezoelectric acceleration sensor and a sound level meter, and is used to collect the vibration signal of the main transformer, and the piezoelectric acceleration sensor is arranged on both sides of the oil tank wall adjacent to each phase winding of the three-phase main transformer under test; after the piezoelectric acceleration sensor detects the vibration signal of the three-phase main transformer under test, it is amplified and filtered by the signal conditioning module, and then the data acquisition module transmits it to the data processing module, and the data processing module processes the vibration signal, and can detect the operating status of the main transformer in real time, with high monitoring accuracy.

[0004] The above patent can only realize the monitoring of vibration noise during actual use, and the failure of the main transformer is not only caused by vibration, resulting in the inability to comprehensively monitor the operating status of the main transformer when monitoring the main transformer; therefore, it does not meet the existing needs. In this regard, we propose a multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant. By monitoring the multi-dimensional signals of the main transformer, the operating status of the main transformer can be comprehensively evaluated from different angles, potential problems can be discovered in time, the reliability and safety of the power system can be improved, and real-time main transformer operating status information can be provided to users, so as to better perform maintenance and management, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-dimensional online signal acquisition method for a main transformer of a gas turbine power plant, comprising the following steps:

[0007] Step 1: Use the online acquisition module to collect the vibration information of the main transformer, convert the vibration information into an electrical signal, filter, suppress noise and perform spectrum analysis on the electrical signal to obtain the vibration signal of the main transformer;

[0008] Step 2: Capture and analyze the infrared radiation energy emitted by the main transformer to form an intuitive infrared thermal image and obtain the temperature signal of the main transformer;

[0009] Step 3: Sampling the voltage of the main transformer, obtaining the voltage signal of the main transformer after rectification, filtering and amplification, obtaining the current value according to the obtained voltage signal, and analyzing the current signal according to the current value;

[0010] Step 4: Analyze the electrical performance, thermal performance and mechanical performance of the main transformer based on the collected multi-dimensional online signals of the main transformer;

[0011] Step 5: Evaluate the electromagnetic interference and potential faults inside the main transformer based on the analysis results.

[0012] Preferably, the online acquisition module includes:

[0013] A vibration signal acquisition module is used to collect vibration information of the main transformer, process the vibration information, and obtain a vibration signal of the main transformer;

[0014] The temperature signal acquisition module is used to capture and analyze the infrared radiation energy emitted by the main transformer, form an intuitive infrared thermal image, and obtain the temperature signal of the main transformer;

[0015] The voltage and current signal acquisition module is used to sample the voltage of the main transformer and obtain the voltage signal of the main transformer after processing, and analyze the current signal according to the obtained voltage signal.

[0016] Preferably, the vibration signal acquisition module specifically includes:

[0017] The vibration information of the main transformer is obtained through the sensor, and the vibration information is converted into an analog electrical signal;

[0018] Convert the analog signal into a digital signal using an A / D converter and store the converted data signal;

[0019] Perform preliminary filtering and noise suppression on the stored digital signals to reduce background noise and other interference factors;

[0020] The digital signal is further filtered, noise suppressed and spectrum analyzed to obtain the frequency component of the signal, and the vibration signal of the main transformer is obtained according to the frequency component of the signal;

[0021] The vibration signal data is stored and displayed in the form of data and waveform graphs.

[0022] Preferably, the temperature signal acquisition module specifically includes:

[0023] Capture infrared radiation data through an infrared thermal imager and process the infrared radiation data into a visual thermal image;

[0024] Use infrared thermal imaging to display the temperature distribution of the main transformer and monitor the internal temperature and appearance of the main transformer in real time;

[0025] An over-temperature threshold of the main transformer is set, and a temperature signal of the main transformer is obtained according to the temperature distribution of the main transformer.

[0026] Preferably, the obtaining of the voltage signal of the main transformer specifically includes:

[0027] The output voltage of the main transformer is sampled by using a sampling circuit;

[0028] The output voltage of the main transformer is stepped down, and then the AC power of the main transformer is converted into DC power using a rectifier;

[0029] By connecting the filter capacitor and utilizing the energy storage and filtering characteristics of the filter capacitor, the DC power of the main transformer is filtered, and the voltage signal of the main transformer is obtained after the processing is completed.

[0030] Preferably, obtaining the current value according to the obtained voltage signal specifically includes:

[0031] Obtain the capacity of the main transformer, and calculate the output current of the main transformer according to the obtained voltage signal;

[0032] The current value of the main transformer is calculated based on the output current, voltage and capacity of the main transformer.

[0033] Preferably, analyzing the current signal according to the current value specifically includes:

[0034] If the current value is abnormally high, it means that the main transformer is under excessive load, and the current signal is that the main transformer is overheating or damaged;

[0035] If the current value is too low, it means that the main transformer is not fully utilized, and the current signal indicates that the power system efficiency of the main transformer is low.

[0036] The operating status of the main transformer is determined based on the change in current value.

[0037] Preferably, the main transformer electrical performance, thermal performance and mechanical performance analyzed based on the collected multi-dimensional online signals of the main transformer specifically include:

[0038] By collecting the main transformer current signal and voltage signal, analyze whether the main transformer electrical performance has any fault;

[0039] By collecting the temperature signal of the main transformer, it is determined whether the temperature of the main transformer exceeds the threshold value. If so, an early warning is issued;

[0040] By collecting the vibration signal of the main transformer, it is analyzed whether there are mechanical failures or poor operating conditions in the main transformer components.

[0041] Preferably, the evaluating the electromagnetic interference inside the main transformer according to the analysis result specifically includes:

[0042] Determine whether the main transformer will break down under high voltage based on its electrical performance, and evaluate whether the main transformer can resist external electromagnetic interference based on the judgment result;

[0043] Check the insulation resistance of the winding and the insulation resistance between the winding and the core to ensure that the winding will not break down under high voltage, thereby avoiding the generation of electromagnetic interference. Thermal performance evaluation:

[0044] The heat dissipation performance of the main transformer is evaluated based on the thermal performance of the main transformer, and the electromagnetic interference suppression capability of the main transformer is evaluated based on the heat dissipation performance of the main transformer;

[0045] According to the mechanical properties of the main transformer, determine whether the main transformer structure is stable and whether it is loose or deformed. Based on the judgment results, evaluate the electromagnetic interference level of the main transformer.

[0046] Preferably, the evaluating the potential fault of the main transformer according to the analysis result specifically includes:

[0047] Determine whether the main transformer is overheated based on the electrical signal of the main transformer. If the electrical signal of the main transformer is overheated, it means that the main transformer has poor lead contact and poor welding quality of the coil wire joint;

[0048] Analyze whether the main transformer has any changes in appearance according to its heat resistance, such as lead wire breakage, loose screws, etc., and determine whether the oil temperature of the main transformer is too high when the infrared temperature of the main transformer is high. If the oil temperature is too high, check whether the oil temperature fluctuates within the normal range. If the oil temperature fluctuates normally, it means that there is a fault inside the main transformer.

[0049] Judge whether the operating sound of the main transformer is normal based on the mechanical properties of the main transformer. If the main transformer makes abnormal noises during normal operation, it means that there is a hidden fault inside the main transformer.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] By monitoring the multi-dimensional signals of the main transformer, the present invention can comprehensively evaluate the operating status of the main transformer from different angles, discover potential problems in a timely manner, and improve the reliability and safety of the power system. At the same time, by acquiring these signals in real time, data interconnection and sharing can be achieved, providing users with real-time main transformer operating status information, thereby better maintaining and managing. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of a multi-dimensional online signal acquisition method for a main transformer of a gas turbine power plant according to the present invention;

[0053] Figure 2 It is a schematic diagram of the module of the multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In order to solve the problem that the existing patent can only monitor the vibration noise in actual use, and the failure of the main transformer is not only caused by vibration, resulting in the inability to fully monitor the operating status of the main transformer when monitoring the main transformer, please refer to Figure 1-Figure 2 , this embodiment provides the following technical solutions:

[0056] The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant includes the following steps:

[0057] Step 1: Use the online acquisition module to collect the vibration information of the main transformer, convert the vibration information into an electrical signal, filter, suppress noise and perform spectrum analysis on the electrical signal to obtain the vibration signal of the main transformer;

[0058] Step 2: Capture and analyze the infrared radiation energy emitted by the main transformer to form an intuitive infrared thermal image and obtain the temperature signal of the main transformer;

[0059] Step 3: Sampling the voltage of the main transformer, obtaining the voltage signal of the main transformer after rectification, filtering and amplification, obtaining the current value according to the obtained voltage signal, and analyzing the current signal according to the current value;

[0060] Step 4: Analyze the electrical performance, thermal performance and mechanical performance of the main transformer based on the collected multi-dimensional online signals of the main transformer;

[0061] Step 5: Evaluate the electromagnetic interference and potential faults inside the main transformer based on the analysis results.

[0062] By monitoring the multi-dimensional signals of the main transformer, the operating status of the main transformer can be comprehensively evaluated from different angles, potential problems can be discovered in a timely manner, and the reliability and safety of the power system can be improved. At the same time, by acquiring these signals in real time, data interconnection and sharing can be achieved, providing users with real-time main transformer operating status information, thereby better maintaining and managing.

[0063] Online acquisition module, including:

[0064] The vibration signal acquisition module is used to collect the vibration information of the main transformer, process the vibration information, and obtain the vibration signal of the main transformer. The collection and analysis of the vibration signal of the main transformer can not only prevent the failure of the main transformer and improve the reliability and safety of the main transformer, but also reduce the maintenance cost and extend the life of the main transformer, thereby improving the overall production efficiency and economic benefits;

[0065] The temperature signal acquisition module is used to capture and analyze the infrared radiation energy emitted by the main transformer, form an intuitive infrared thermal image, obtain the temperature signal of the main transformer, and can monitor the temperature of the main transformer in real time and continuously to ensure the timeliness and accuracy of the data. At the same time, the infrared thermal imaging technology itself has high sampling accuracy and resolution, and can accurately detect the temperature distribution of the main transformer;

[0066] The voltage and current signal acquisition module is used to sample the voltage of the main transformer and obtain the voltage signal of the main transformer after processing. The current signal is analyzed according to the obtained voltage signal, and the voltage and current signals of the main transformer are collected. This is of great significance for ensuring the safe, stable and efficient operation of the power system. It can realize high-precision and real-time monitoring of multi-dimensional signals of the main transformer, so as to timely discover potential problems and improve the reliability and safety of the power system.

[0067] Obtain the vibration signal of the main transformer, including:

[0068] The vibration information of the main transformer is obtained through the sensor and converted into analog electrical signals to ensure the accuracy and reliability of the data;

[0069] Convert the analog signal into a digital signal using an A / D converter and store the converted data signal;

[0070] Perform preliminary filtering and noise suppression on stored digital signals to reduce the impact of background noise and other interference on the data

[0071] The digital signal is further filtered, noise suppressed and spectrum analyzed to obtain the frequency components of the signal, and the vibration signal of the main transformer is obtained based on the frequency components of the signal. These processes help to extract the characteristics related to the state of the main transformer, such as frequency, amplitude, etc., and convert the signal from the time domain to the frequency domain, so as to analyze the frequency components of the signal.

[0072] The vibration signal data is stored and displayed in the form of data and waveform graphs. By analyzing the saved data, the fault characteristic values ​​can be extracted, and then the status of the main transformer can be analyzed. The health status of the main transformer can be monitored and diagnosed, and the operating efficiency and energy efficiency of the main transformer can be improved.

[0073] Obtain the temperature signal of the main transformer, including

[0074] By capturing infrared radiation data with an infrared thermal imager and processing the infrared radiation data into a visualized thermal image, the temperature distribution of the main transformer can be detected contactlessly, thereby timely discovering potential problems such as overheating and poor contact inside the main transformer. When the temperature of the main transformer is detected to be abnormal, an early warning signal can be automatically issued and the operation and maintenance personnel can be notified, thus realizing intelligent early warning, allowing the operation and maintenance personnel to have a deeper understanding of the operating status and performance characteristics of the main transformer;

[0075] Use infrared thermal imaging to display the temperature distribution of the main transformer and monitor the internal temperature and appearance of the main transformer in real time;

[0076] The over-temperature threshold of the main transformer is set, and the temperature signal of the main transformer is obtained according to the temperature distribution of the main transformer, so as to help the operation and maintenance personnel to comprehensively and real-time monitor the temperature status of the main transformer. The temperature signal of the main transformer can be effectively collected and analyzed, potential problems can be discovered in time, and the safe operation of the power system can be ensured. It can not only improve the real-time and accuracy of monitoring, but also improve safety and work efficiency, and provide more comprehensive and accurate data support for the maintenance and management of the main transformer.

[0077] Obtain the voltage signal of the main transformer, including:

[0078] The output voltage of the main transformer is sampled by using a sampling circuit;

[0079] The output voltage of the main transformer is stepped down, and then the AC power of the main transformer is converted into DC power using a rectifier. The rectifier is usually composed of diodes, which converts the AC power into unidirectional pulsating DC power.

[0080] By connecting the filter capacitor and utilizing the energy storage and filtering characteristics of the filter capacitor, the DC power of the main transformer is filtered, and the voltage signal of the main transformer is obtained after the processing is completed.

[0081] Use sensors to collect vibration signals from the main transformer. This method captures vibration information through sensors installed on the main transformer, and then converts the analog signal into a digital signal through an A / D converter for further analysis and processing, thereby achieving early warning and diagnosis of main transformer faults.

[0082] The current value is obtained according to the obtained voltage signal, specifically including:

[0083] Obtain the capacity of the main transformer, and calculate the output current of the main transformer according to the obtained voltage signal;

[0084] The current value of the main transformer is calculated based on the output current, voltage and capacity of the main transformer.

[0085] Analyze the current signal according to the current value, including:

[0086] If the current value is abnormally high, it means that the main transformer is under excessive load, and the current signal is that the main transformer is overheating or damaged;

[0087] If the current value is too low, it means that the main transformer is not fully utilized, and the current signal indicates that the power system efficiency of the main transformer is low.

[0088] The operating status of the main transformer is determined based on the change in the current value. For example, if the current value suddenly increases, it may indicate that the main transformer is experiencing a load peak and needs to take appropriate measures to deal with it. If the current value remains stable, it indicates that the main transformer is operating within the normal range.

[0089] By collecting the current signal of the main transformer, we can not only discover possible safety risks in a timely manner, but also understand the overall health status of the main transformer, avoid the main transformer current abnormality causing main transformer overheating, fire and other safety hazards, effectively extend the service life of the main transformer, but also can be used to analyze the operating status of the main transformer, understand its load changes, temperature rise, etc., help optimize the operation management of the main transformer, reduce maintenance costs. Analysis of the current signal of the main transformer mainly includes measuring the current value, interpreting the high and low current values, and judging the operating status of the main transformer according to the changes in the current value, which helps to ensure the safety and efficiency of the power system.

[0090] The main transformer electrical performance, thermal performance and mechanical performance are analyzed based on the collected multi-dimensional online signals of the main transformer, including:

[0091] By collecting the main transformer current signal and voltage signal, we can analyze whether there is any fault in the electrical performance of the main transformer. Real-time monitoring of these parameters can help timely detect electrical faults or abnormalities, such as short circuits and open circuits, so as to ensure the safe operation of the main transformer.

[0092] By collecting the temperature signal of the main transformer, it is determined whether the temperature of the main transformer exceeds the threshold. If it exceeds the threshold, an early warning is issued to prevent damage to the main transformer caused by overheating. Abnormal temperature rise may indicate internal faults or poor heat dissipation. Timely detection and processing of these abnormalities is crucial to preventing damage to the main transformer.

[0093] By collecting the vibration signal of the main transformer, it is analyzed whether there are any mechanical faults or poor operating conditions in the main transformer components, such as bearing wear, loose structure, etc.

[0094] Evaluate the electromagnetic interference inside the main transformer based on the analysis results, including:

[0095] Determine whether the main transformer will break down under high voltage based on its electrical performance, evaluate whether the main transformer can resist external electromagnetic interference based on the judgment result, and reduce its own electromagnetic interference to the external environment based on the judgment result to ensure the normal operation of the main transformer inside the main transformer;

[0096] Check the insulation resistance of the winding and the insulation resistance between the winding and the core to ensure that the winding will not break down under high voltage, thereby avoiding the generation of electromagnetic interference. Thermal performance evaluation:

[0097] The heat dissipation performance of the main transformer is evaluated based on the thermal performance of the main transformer, and the electromagnetic interference suppression capability of the main transformer is evaluated based on the heat dissipation performance of the main transformer. When the temperature signal is too high, the performance of the internal insulation material of the main transformer will be reduced, thereby affecting the electromagnetic interference suppression capability;

[0098] According to the mechanical properties of the main transformer, determine whether the main transformer structure is stable and whether it is loose or deformed. Based on the judgment result, evaluate the electromagnetic interference level of the main transformer. Whether the main transformer structure is loose or deformed will affect the distribution of the electromagnetic field, and thus affect the level of electromagnetic interference.

[0099] Based on the analysis results, potential faults of the main transformer are evaluated, including:

[0100] Determine whether the main transformer is overheated based on the electrical signal of the main transformer. If the electrical signal of the main transformer is overheated, it means that the main transformer has poor lead contact and poor welding quality of the coil wire joints. This ensures the safe and stable operation of the main transformer and can promptly detect potential insulation problems such as partial discharge or insulation breakdown. It can also detect signs of faults in advance, conduct early warnings and maintenance, and prevent damage to the main transformer.

[0101] Analyze whether the main transformer has any changes in appearance according to its heat resistance, such as lead wire breakage, loose screws, etc., and determine whether the oil temperature of the main transformer is too high when the infrared temperature of the main transformer is high. If the oil temperature is too high, check whether the oil temperature fluctuates within the normal range. If the oil temperature fluctuates normally, it means that there is a fault inside the main transformer.

[0102] Judge whether the operating sound of the main transformer is normal based on the mechanical properties of the main transformer. If the main transformer makes abnormal noises during normal operation, it means that there is a hidden fault inside the main transformer.

[0103] By repairing potential problems, it can help reduce the unplanned downtime of the main transformer, help improve the reliability and availability of the main transformer, reduce production interruptions, reduce the mechanical stress and wear of the main transformer, thereby extending the service life of the main transformer. Safety is improved, and the risk of main transformer failure can be reduced, reducing the potential threats to operators and the environment during the operation of the main transformer.

[0104] In summary, the multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant of the present invention, the acquisition and analysis of the vibration signal of the main transformer can not only prevent the failure of the main transformer, improve the reliability and safety of the main transformer, but also reduce the maintenance cost and extend the life of the main transformer, thereby improving the overall production efficiency and economic benefits, by acquiring the temperature signal, not only can the real-time and accuracy of the monitoring be improved, but also the safety and work efficiency can be improved, and more comprehensive and accurate data support can be provided for the maintenance and management of the main transformer, the voltage and current signals of the main transformer are collected, which is of great significance for ensuring the safe, stable and efficient operation of the power system, and can realize high-precision and real-time monitoring of the multi-dimensional signals of the main transformer, so as to timely discover potential problems and improve the reliability and safety of the power system, and by monitoring the multi-dimensional signals of the main transformer, the operating status of the main transformer can be comprehensively evaluated from different angles, potential problems can be discovered in time, and the reliability and safety of the power system can be improved. At the same time, by acquiring these signals in real time, the interconnection and sharing of data can be realized, and the user can be provided with real-time main transformer operating status information, so as to better perform maintenance and management.

[0105] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or main transformer including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or main transformer.

[0106] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A multi-dimensional online signal acquisition method for a main transformer of a gas turbine power plant, characterized in that: The following steps are involved: Step 1: Use the online acquisition module to collect the vibration information of the main transformer, convert the vibration information into an electrical signal, filter, suppress noise and perform spectrum analysis on the electrical signal to obtain the vibration signal of the main transformer; Step 2: Capture and analyze the infrared radiation energy emitted by the main transformer to form an intuitive infrared thermal image and obtain the temperature signal of the main transformer; Step 3: Sampling the voltage of the main transformer, obtaining the voltage signal of the main transformer after rectification, filtering and amplification, obtaining the current value according to the obtained voltage signal, and analyzing the current signal according to the current value; Step 4: Analyze the electrical performance, thermal performance and mechanical performance of the main transformer based on the collected multi-dimensional online signals of the main transformer; Step 5: Evaluate the electromagnetic interference and potential faults inside the main transformer based on the analysis results.

2. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 1 is characterized in that: The online acquisition module comprises: A vibration signal acquisition module is used to collect vibration information of the main transformer, process the vibration information, and obtain a vibration signal of the main transformer; The temperature signal acquisition module is used to capture and analyze the infrared radiation energy emitted by the main transformer, form an intuitive infrared thermal image, and obtain the temperature signal of the main transformer; The voltage and current signal acquisition module is used to sample the voltage of the main transformer and obtain the voltage signal of the main transformer after processing, and analyze the current signal according to the obtained voltage signal.

3. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 2 is characterized in that: The vibration signal acquisition module specifically includes: The vibration information of the main transformer is obtained through the sensor, and the vibration information is converted into an analog electrical signal; Convert the analog signal into a digital signal using an A / D converter and store the converted data signal; Perform preliminary filtering and noise suppression on the stored digital signals; The digital signal is further filtered, noise suppressed and spectrum analyzed to obtain the frequency component of the signal, and the vibration signal of the main transformer is obtained according to the frequency component of the signal; The vibration signal data is stored and displayed in the form of data and waveform graphs.

4. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 2 is characterized in that: The temperature signal acquisition module specifically includes Capture infrared radiation data through an infrared thermal imager and process the infrared radiation data into a visual thermal image; Use infrared thermal imaging to display the temperature distribution of the main transformer and monitor the internal temperature and appearance of the main transformer in real time; An over-temperature threshold of the main transformer is set, and a temperature signal of the main transformer is obtained according to the temperature distribution of the main transformer.

5. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 1 is characterized in that: The obtaining of the voltage signal of the main transformer specifically includes: The output voltage of the main transformer is sampled by using a sampling circuit; The output voltage of the main transformer is stepped down, and then the AC power of the main transformer is converted into DC power using a rectifier; By connecting the filter capacitor and utilizing the energy storage and filtering characteristics of the filter capacitor, the DC power of the main transformer is filtered, and the voltage signal of the main transformer is obtained after the processing is completed.

6. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 5 is characterized in that: The obtaining of the current value according to the obtained voltage signal specifically includes: Obtain the capacity of the main transformer, and calculate the output current of the main transformer according to the obtained voltage signal; The current value of the main transformer is calculated based on the output current, voltage and capacity of the main transformer.

7. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 1 is characterized in that: Analyzing the current signal according to the current value specifically includes: If the current value is abnormally high, it means that the main transformer is under excessive load, and the current signal is that the main transformer is overheating or damaged; If the current value is too low, it means that the main transformer is not fully utilized, and the current signal indicates that the power system efficiency of the main transformer is low; The operating status of the main transformer is determined based on the change in current value.

8. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 6 is characterized by: The main transformer electrical performance, thermal performance and mechanical performance analyzed based on the collected multi-dimensional online signals of the main transformer specifically include: By collecting the main transformer current signal and voltage signal, analyze whether the main transformer electrical performance has any fault; By collecting the temperature signal of the main transformer, it is determined whether the temperature of the main transformer exceeds the threshold value. If so, an early warning is issued; By collecting the vibration signal of the main transformer, it is analyzed whether there are mechanical failures or poor operating conditions in the main transformer components.

9. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 1 is characterized in that: The step of evaluating the electromagnetic interference inside the main transformer according to the analysis result specifically includes: Determine whether the main transformer will break down under high voltage based on its electrical performance, and evaluate whether the main transformer can resist external electromagnetic interference based on the judgment result; Check the insulation resistance of the winding and the insulation resistance between the winding and the core to ensure that the winding will not break down under high voltage, thereby avoiding the generation of electromagnetic interference. Thermal performance evaluation: The heat dissipation performance of the main transformer is evaluated based on the thermal performance of the main transformer, and the electromagnetic interference suppression capability of the main transformer is evaluated based on the heat dissipation performance of the main transformer; According to the mechanical properties of the main transformer, determine whether the main transformer structure is stable and whether it is loose or deformed. Based on the judgment results, evaluate the electromagnetic interference level of the main transformer.

10. The multi-dimensional online signal acquisition method for the main transformer of a gas turbine power plant according to claim 9, characterized in that: The potential fault of the main transformer is evaluated according to the analysis result, specifically including: Determine whether the main transformer is overheated based on the electrical signal of the main transformer. If the electrical signal of the main transformer is overheated, it means that the main transformer has poor lead contact and poor welding quality of the coil wire joint; Analyze whether the main transformer's appearance has changed according to its heat resistance performance and determine whether the main transformer's oil temperature is too high when the infrared temperature of the main transformer is high. If the oil temperature is too high, check whether the oil temperature fluctuates within the normal range. If the oil temperature fluctuates normally, it indicates that there is a fault inside the main transformer. Judge whether the operating sound of the main transformer is normal based on the mechanical properties of the main transformer. If the main transformer makes abnormal noises during normal operation, it means that there is a hidden fault inside the main transformer.

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