Converter transformer comprehensive protection system

Abstract

The invention discloses a comprehensive protection system of a converter transformer. The comprehensive protection system of the converter transformer is divided into an on-site monitoring system, a feedback control system, a data detection system and a remote monitoring system. The on-site monitoring system is composed of an on-site monitor, a sensor module, an abnormity alarm module and a serial port switch. The feedback control system is composed of a feedback controller, a safety detector, a transformer temperature controller and a serial port switch. The data detection system is composed of a data detector, a transformer data terminal box, a transformer fault terminal box and a serial port switch. The remote monitoring system is an upper computer system developed through Labview software and is composed of a login verification module, a system interface module, a data management module and a fault diagnosis module. According to the invention, the operation state of the transformer can be monitored in real time, and alarm and emergency operation can be carried out in time.

Description

Technical Field

[0001] The invention relates to a converter transformer comprehensive protection system, belonging to the field of transformer monitoring and protection. Background Art

[0002] The China Fusion Engineering Test Reactor (CFETR) is an important project for conducting research on magnetic confinement fusion reactors in my country. The establishment of the CRAFT (Critical Research Facility for Integrated Research of Fusion Reactor Host) is to explore and master the key technologies of the system and to conduct technical verification for the successful construction of CFETR. Neutral beam injection is an effective method for heating and current driving of fusion plasma. For the development of the next generation of fusion reactors, a neutral beam injection (NNBI) system based on a negative ion source was designed in the CRAFT (Critical Research Facility for Integrated Research of Fusion Reactor Host). A 400keV / 28A / 3600s NBI power supply system is planned to be developed as the NBI prototype of the CRAFT device, which requires a 400kV / 28A DC high-voltage power supply as its accelerator high-voltage power supply.

[0003] The NBI power supply system can be generally divided into three categories: ion source and extraction power supply, accelerator power supply, and ground-related power supply. In the entire power supply system, the accelerator power supply is the power supply with the highest voltage level, the largest power, and the most important operation and maintenance. Among them, the converter transformer is one of the core components of the CRAFT NNBI accelerator high-voltage power supply. Its main function is to increase the step voltage wave output by the inverter and electrically isolate the high-voltage side and the low-voltage side, so that the control part of the accelerator high-voltage power supply is realized on the low-voltage side, so that the entire power supply system can operate safely and reliably.

[0004] During the experimental operation, due to the high voltage characteristics of the converter transformer itself, the transformer faces many safety risks during operation, which is extremely dangerous. Therefore, in order to protect the experimental equipment and ensure the safe operation of the experiment, it is necessary to remotely monitor and handle various safety risks and establish a reliable comprehensive protection system. Summary of the invention

[0005] The present invention provides a converter transformer integrated protection system, which solves the problems disclosed in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A converter transformer integrated protection system, comprising:

[0008] On-site monitoring system, used for real-time monitoring and alarm of abnormal situations occurring at the experimental site;

[0009] Feedback control system, used for safety detection before experimental operation, and feedback control of abnormal conditions of converter transformers during experimental operation;

[0010] The data detection system is used to collect various data indicators during the operation of the converter transformer in real time, and to monitor and alarm the internal faults of the converter transformer in real time;

[0011] The remote monitoring system is used to remotely monitor and control the overall operating conditions of the converter transformer during experimental operation.

[0012] Further, the field monitoring system includes: a field monitor, a combustible gas sensor, a sound sensor, an infrared sensor, a flame sensor and a serial port switch;

[0013] The combustible gas sensor is used to detect the combustible gas content in the air at the experimental site and generate an analog signal;

[0014] The sound sensor is used to detect the sound at the experimental site and generate an analog signal;

[0015] The infrared sensor is used to detect the infrared rays emitted by the human body at the experimental site, and generate a level signal after receiving, amplifying and comparing;

[0016] The flame sensor is used to detect the flame at the experimental site and output a switch signal, which is then compared to generate a level signal.

[0017] The field monitor includes a DSP module, a power supply module, an ADC sampling module, an electrical signal detection module and a serial communication module. The DSP module is used for the logic control of the field monitoring system and for receiving and sending various signal instructions; the power supply module is used for isolating and supplying power to various power chips and module peripherals; the ADC sampling module is used for transmitting analog signals of the combustible gas sensor and the sound sensor to the DSP module, and the DSP module determines whether the combustible gas content at the experimental site exceeds the standard and whether abnormal sounds occur; the electrical signal detection module is used for transmitting the level signals sent by the infrared sensor and the flame sensor to the DSP module, and the signal transmitted to the DSP module determines whether there are people who accidentally break into the site during the experiment and whether there is a device ignition phenomenon at the experimental site; the serial communication module is used for realizing data transmission through a serial port switch.

[0018] Furthermore, the on-site monitoring system also includes: a buzzer, which sends out an alarm signal when the DSP module determines that the combustible gas content exceeds the standard, an abnormal sound occurs, a person accidentally breaks into the site during the experiment, or a device ignites.

[0019] Furthermore, the on-site monitoring system also includes: an identity authenticator, which is used to temporarily block the buzzer from sending out an alarm signal when the staff enters the on-site maintenance under abnormal circumstances.

[0020] Furthermore, the feedback control system includes: a feedback controller, a UPS power supply, a grounding detector, an overcurrent detector, a transformer oil level temperature controller, a transformer winding temperature controller and a serial port switch;

[0021] The feedback controller includes a DSP module, a power supply module, an optical signal transmitting module, an optical signal receiving module and a serial communication module; the DSP module is used for the logic control of the feedback control system, and for receiving and sending various signal instructions; the power supply module is used for isolating and supplying power to various power chips and module peripherals; the serial communication module is used for realizing data transmission through a serial switch;

[0022] UPS power supply is used to provide stable and uninterrupted power supply to the equipment. The battery power status is detected through the optical signal receiving module. When the battery power is good, the level signal converted by the optical signal receiving module is a high level signal. When the battery power alarm is triggered, the level signal converted by the optical signal receiving module is a low level signal. The optical signal receiving module sends the level signal to the DSP module, and the DSP module determines the power status of the UPS power supply by detecting the level signal.

[0023] A grounding detector is used to detect the optical signal and send it to the optical signal receiving module, and the optical signal receiving module sends the optical signal to the DSP module; when the optical signal is detected, the DSP module determines that the grounding rod is connected, and when the optical signal is not detected, the DSP module determines that the grounding rod is disconnected;

[0024] The overcurrent detector is used to detect the optical signal and send it to the optical signal receiving module, and the optical signal receiving module sends the optical signal to the DSP module; when the optical signal is detected, the DSP module determines that the overcurrent detection has been completed, and when the optical signal is not detected, the DSP module determines that the overcurrent detection has not been completed;

[0025] Transformer oil level temperature controller: when the transformer oil level temperature is abnormal, the DSP module sends an optical signal through the optical signal transmission module to drive the cooling fan to run and cool the transformer oil tank;

[0026] Transformer winding temperature controller: when the transformer winding temperature is abnormal, the DSP module sends an optical signal through the optical signal transmitting module to drive the cooling fan to cool the transformer oil tank.

[0027] Further, the data detection system includes a data detector, a transformer data terminal box, a transformer fault terminal box and a serial port switch;

[0028] The data detector includes a DSP module, a power supply module, an ADC sampling module, an electrical signal detection module and a serial communication module; the DSP module is used for the logic control of the data detection system, and receives and sends various signal instructions; the power supply module is used to isolate and power a variety of power chips and module peripherals; the ADC sampling module is responsible for collecting the analog signal in the transformer data terminal box to the DSP module; the electrical signal detection module is used to detect the level signal sent by the transformer fault terminal box; the serial communication module is used to realize data transmission through a serial switch;

[0029] The transformer data terminal box provides various operation data collection ports for the transformer, including the temperature of the transformer's three-phase winding, core temperature, clamp temperature, and oil tank temperature. The DSP module collects various data through the 4-20ma current sampling method.

[0030] The transformer fault terminal box provides various fault signal collection ports for the transformer, including transformer light gas alarm, heavy gas tripping, liquid level alarm and pressure valve alarm. The DSP module determines the fault inside the transformer by detecting the level signal emitted by the terminal port.

[0031] Furthermore, the remote monitoring system includes a login verification module, a system interface module, a data management module and a fault diagnosis module;

[0032] Login verification module, which is used to verify the account and password, so that users with corresponding permissions can log in to the system to operate and view information;

[0033] The system interface module is used to display the on-site monitoring system, data detection system and feedback control system in an interface manner, and to visualize the data and signals collected by each system;

[0034] Data management module, used for data storage, data reading and data report generation. Users can selectively save transformer data, read corresponding data and save the data in the form of EXCEL table to the monitoring host;

[0035] The fault diagnosis module is used to query the fault report and fault data table during the experiment operation, and also has the fault warning function.

[0036] The beneficial effects achieved by the present invention are:

[0037] The converter transformer comprehensive protection system of the present invention is more convenient for experimental parameter collection and analysis, the upper computer interface is concise and clear, and the functions are more complete; at the same time, it has the ability of fault warning. In the existing fault detection, only winding temperature detection can be used for threshold alarm. For malignant faults, the threshold alarm is often not timely due to the influence of thermal resistance. For slow-changing faults, there will be a long period of faulty operation without reaching the alarm threshold and cannot be discovered in time. The present invention uses the LSTM algorithm to perform early warning calculation on the transformer winding temperature, discovers the safety hazards in the system operation in advance, improves the operation and maintenance efficiency, reduces the operation and maintenance costs, and verifies the effectiveness and practical value of the protection system design. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the field monitoring system in the present invention;

[0039] Figure 2 It is a schematic diagram of the structure of the feedback control system in the present invention;

[0040] Figure 3 It is a structural schematic diagram of the data detection system in the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the remote monitoring system in the present invention;

[0042] Figure 5 It is a schematic diagram of the temperature prediction model process in the present invention;

[0043] Figure 6 It is a schematic diagram of the temperature prediction model fitting in the present invention. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0045] The present invention provides a converter transformer integrated protection system, comprising:

[0046] On-site monitoring system, used for real-time monitoring and alarm of abnormal situations occurring at the experimental site;

[0047] Feedback control system, used for safety detection before experimental operation, and feedback control of abnormal conditions of converter transformers during experimental operation;

[0048] The data detection system is used to collect various data indicators during the operation of the converter transformer in real time, and to monitor and alarm the internal faults of the converter transformer in real time;

[0049] The remote monitoring system is used to remotely monitor and control the overall operating conditions of the converter transformer during experimental operation.

[0050] like Figure 1 As shown, the field monitoring system is mainly composed of a field monitor, a combustible gas sensor, a sound sensor, an identity authenticator, an infrared sensor, a flame sensor, a buzzer and a serial port switch.

[0051] The field monitor consists of five parts: DSP module, power supply module, ADC sampling module, electrical signal detection module and serial communication module. The DSP module is responsible for the logical control of the field monitoring system, receiving and sending various signal instructions; the power supply module is responsible for isolating and supplying power to various power chips and module peripherals; the ADC sampling module is responsible for collecting the analog signals of the combustible gas sensor and the sound sensor into the field monitor; the electrical signal detection module is responsible for detecting the level signals sent by the infrared sensor, flame sensor and identity authenticator; the serial communication module is responsible for data transmission function;

[0052] Combustible gas sensor: Use MQ-2 model combustible gas sensor. When the system is running, the combustible gas content in the air can be sent to the ADC sampling module in the form of analog signals to detect whether the combustible gas content in the air at the experimental site exceeds the standard.

[0053] The sound sensor uses the LM386 sound sensor to collect the sound near the monitor and output it as a bipolar analog quantity. After filtering and conditioning, it is sent to the ADC sampling module in the form of an analog signal to detect abnormal sounds at the scene when an accident such as explosion or human voice occurs or is about to occur.

[0054] The identity authenticator is implemented with the MFRC522 chip as the core and the radio frequency IC card. After the IC card authentication, the identity authenticator will send a TTL level signal to the electrical signal detection module, which is used to temporarily shield the alarm signal of the on-site monitor when the staff enters the on-site maintenance under special circumstances;

[0055] Infrared sensor, using HC-SR505 model infrared sensor, can receive, amplify and compare the infrared rays emitted by the human body to generate TTL level signals, and send them to the electrical signal detection module, so as to detect the passing people and detect whether there are people who accidentally break into the scene when the experiment is running;

[0056] The flame sensor uses a Risym model flame sensor. The output switch signal is obtained by the comparator. After comparison, a TTL level signal is generated and sent to the level detection module to determine whether the device ignites or not at the experimental site.

[0057] Buzzer: Use an active buzzer. When the on-site monitor detects an abnormal condition, it sends a TTL level signal to drive the active buzzer to sound an alarm.

[0058] The serial port switch uses Advantech EKI1526 model serial port switch to communicate with the serial port communication module of the field monitor for data.

[0059] like Figure 2 As shown, the feedback control system is mainly composed of a feedback controller, a UPS power supply, a grounding detector, an overcurrent detector, a transformer oil level temperature controller, a transformer winding temperature controller and a serial port switch.

[0060] The feedback controller consists of five parts: DSP module, power supply module, optical signal transmitting module, optical signal receiving module and serial communication module. The DSP module is responsible for the logic control of the feedback control system, receiving and sending various signal instructions; the power supply module is responsible for isolating and supplying power to various power chips and module peripherals; the optical signal transmitting module adopts HFBR1414 optical fiber transmitting port and SN75451 chip for optical transmission drive; the optical signal receiving module adopts HFBR2412 optical fiber receiving port to convert the received optical signal into TTL level signal; the serial communication module is responsible for data transmission function;

[0061] UPS power supply, that is, uninterruptible power supply, uses batteries and inverters to provide stable and uninterrupted power supply to equipment. We choose EA600N model UPS power supply, which has multiple functions such as online voltage stabilization, short circuit protection, automatic adjustment of inverter frequency, output overload, battery power detection, etc. The battery power status is detected through the optical signal receiving module. When the battery power is good, the level signal converted by the optical signal receiving module is a high-level signal. When the battery power alarm is triggered, the level signal converted by the optical signal receiving module is a low-level signal. The feedback controller determines the power status of the UPS power supply by detecting the level signal. Before the experiment is run, the power status of the UPS power supply needs to be safely detected;

[0062] The grounding detector determines the connection status of the grounding rod by detecting the presence or absence of an optical signal. If an optical signal is detected, it means that the grounding rod is connected, and if no optical signal is detected, it means that the grounding rod is disconnected. When the grounding rod is in a connected state, the signal output cannot be detected during the experiment. Therefore, the connection status of the grounding rod needs to be safely detected by the grounding detector before the experiment is run;

[0063] The overcurrent detector determines the overcurrent protection of the transformer by detecting the presence or absence of an optical signal. If an optical signal is detected, it means that the overcurrent detection has been completed. If no optical signal is detected, it means that the overcurrent detection has not been completed. Overcurrent protection is an important guarantee for the safety of experimental operation. Therefore, before the experiment is run, it is necessary to use the overcurrent detector to detect whether the overcurrent protection has been completed;

[0064] Transformer oil level thermostat. The transformer has a high voltage and a large power. The temperature of the oil level thermostat should be controlled within the normal range, otherwise it will affect its life and even cause insulation breakdown, fire and explosion and other serious consequences. When the temperature of the oil level thermostat is abnormal, the feedback controller will send out an optical signal to drive the cooling fan to cool the transformer oil tank and reduce the loss of the transformer caused by high temperature.

[0065] Transformer winding thermostat. The transformer has a high voltage and a large power. The temperature of the winding thermostat should be controlled within the normal range, otherwise it will affect its life and even cause insulation breakdown, fire and explosion and other serious consequences. When the temperature of the winding thermostat is abnormal, the feedback controller will send out an optical signal to drive the cooling fan to cool the transformer oil tank and reduce the loss of the transformer caused by high temperature;

[0066] The serial port switch uses Advantech EKI1526 serial port switch to communicate with the serial port communication module of the feedback controller.

[0067] like Figure 3 As shown, the data detection system is mainly composed of a data detector, a transformer data terminal box, a transformer fault terminal box and a serial port switch.

[0068] The data detector consists of five parts: DSP module, power supply module, ADC sampling module, electrical signal detection module and serial communication module. The DSP module is responsible for the logical control of the data detection system, receiving and sending various signal instructions; the power supply module is responsible for isolating and supplying power to various power chips and module peripherals; the ADC sampling module is responsible for collecting various analog signals in the transformer data terminal box into the data detector; the electrical signal detection module is responsible for detecting the level signal sent by the transformer fault terminal box; the serial communication module is responsible for data transmission function;

[0069] The transformer data terminal box provides various operation data collection ports for the transformer, including the temperature of the transformer's three-phase winding, core temperature, clamp temperature, oil tank temperature and other data. The data detector can collect various data through the 4-20ma current sampling method;

[0070] The transformer fault terminal box provides various fault signal collection ports for the transformer, including transformer light gas alarm, heavy gas tripping, liquid level alarm, pressure valve alarm and other alarm signals. The data detector can determine the fault inside the transformer by detecting the level signal emitted by the terminal port;

[0071] The serial port switch uses Advantech EKI1526 serial port switch to communicate with the serial port communication module of the data detector.

[0072] like Figure 4As shown, the remote monitoring system is mainly composed of a login verification module, a system interface module, a data management module and a fault diagnosis module.

[0073] Login verification module: after the account and password are verified, only users with corresponding permissions can log in to the system to operate and view information; this mechanism ensures the control of system access and allows managers to set the number of users and permissions according to actual needs; at the same time, this module also has the function of information recording, and the administrator can query the usage of the system in different time periods;

[0074] System interface module, which mainly displays the interface of the field monitoring system, data detection system and feedback control system, and visualizes the data and signals collected by each system;

[0075] Data management module, which mainly implements functions such as data storage, data reading and data report generation. Users can selectively save transformer data, read corresponding data, and save data in the form of EXCEL tables to the monitoring host, making it convenient for experimenters to query past transformer data;

[0076] Fault diagnosis module, this module can query the fault report and fault data table in the experimental operation, and also has the fault warning function. For the transformer, the winding temperature during the operation of the transformer is one of the important conditions for judging the operating condition of the transformer. The existing transformer fault detection only has the winding temperature detection that can be used for threshold alarm. For malignant faults, the threshold alarm is often not timely due to the influence of thermal resistance. For slow-changing faults, because the alarm threshold is not reached, there will be a long period of faulty operation and it cannot be discovered in time.

[0077] The fault diagnosis module of this system incorporates artificial intelligence algorithms, and establishes a relevant temperature prediction model by learning from a large amount of historical sample data. In view of the adaptability of neural networks to large sample data, this system uses the LSTM algorithm to predict the winding temperature. Based on the historical data of transformer winding temperature, a prediction model based on the time series of the LSTM long short-term memory network is constructed to accurately predict the winding temperature, providing a reference for the formulation of transformer operation and maintenance plans.

[0078] like Figure 5 As shown in the flow chart of the temperature prediction model, the specific implementation process of the temperature prediction model is divided into data processing, network construction, model training, and model evaluation.

[0079] Data processing, using the transformer winding historical temperature as the model input variable, calculate its mean and variance and save them, normalize the original data set, and the calculation formula is:

[0080] (1);

[0081] Where: To normalize the data, is the original data; is the data mean; is the data standard deviation. The normalized sample data is sampled and processed according to the time step, i.e., the sampling window, to generate training data, that is, converting the long time series data into multiple short time series data; then the training data is divided into a training set and a validation set in proportion. The training set is used to train the model and fit the relationship between the input and output data, and the validation set is used to adjust the model's hyperparameters and to perform a preliminary evaluation of the model's capabilities; finally, the data in the training set and validation set are sequentially adjusted, respectively, to reduce the time series relationship between short sequences while ensuring the time series relationship within the short sequence, to ensure the generalization ability of the model and avoid overfitting.

[0082] Network construction: Use Matlab built-in network to build LSTM network, including LSTM time series prediction layer and Linear regression output layer. Use stacked LSTM network to increase network depth and improve the nonlinear expression ability of the model.

[0083] Model training: transplant the neural network to the GPU, input the training data into the LSTM network for model training, use the MSELoss loss function and Adam optimization algorithm, calculate the training loss and validation loss for each iteration, stop training when the validation loss does not decrease significantly after several consecutive iterations, return the network parameters with the lowest validation loss and save them.

[0084] Model evaluation: input the test data into the trained temperature prediction model, input the normalized data into the LSTM network to obtain the normalized prediction data, restore the normalized prediction data through the mean and variance saved by data processing to obtain the current winding temperature prediction value, and use the relative temperature difference Calculate the prediction accuracy and evaluate the model performance. The calculation formula is:

[0085] (2);

[0086] (3);

[0087] Where: is the normalized temperature prediction value, is the predicted value of temperature after reduction.

[0088] like Figure 6As shown in the figure, after the temperature prediction model is trained, a total of 2000 status data of the transformer are used as test data. The test data is input into the winding temperature prediction model to calculate the relative temperature difference and evaluate the model performance. The fitting of the training set and the test set of the winding temperature shows that the gap between the true value and the predicted value is not large, and the curve fitting is high. The prediction can be accurately tracked even when the true value fluctuates greatly, indicating that the neural network can dig out the hidden deep information in the sample time series, and the algorithm has good nonlinear characterization capabilities.

[0089] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0090] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A converter transformer integrated protection system, characterized in that: include: On-site monitoring system, used for real-time monitoring and alarm of abnormal situations occurring at the experimental site; Feedback control system, used for safety detection before experimental operation, and feedback control of abnormal conditions of converter transformers during experimental operation; The data detection system is used to collect various data indicators during the operation of the converter transformer in real time, and to monitor and alarm the internal faults of the converter transformer in real time; The remote monitoring system is used to remotely monitor and control the overall operating conditions of the converter transformer during experimental operation.

2. The converter transformer integrated protection system according to claim 1, characterized in that: The field monitoring system includes: a field monitor, a combustible gas sensor, a sound sensor, an infrared sensor, a flame sensor and a serial port switch; The combustible gas sensor is used to detect the combustible gas content in the air at the experimental site and generate an analog signal; The sound sensor is used to detect the sound at the experimental site and generate an analog signal; The infrared sensor is used to detect the infrared rays emitted by the human body at the experimental site, and generate a level signal after receiving, amplifying and comparing; The flame sensor is used to detect the flame at the experimental site and output a switch signal, which is then compared to generate a level signal. The field monitor includes a DSP module, a power supply module, an ADC sampling module, an electrical signal detection module and a serial communication module. The DSP module is used for the logic control of the field monitoring system and for receiving and sending various signal instructions; the power supply module is used for isolating and supplying power to various power chips and module peripherals; the ADC sampling module is used for transmitting analog signals of the combustible gas sensor and the sound sensor to the DSP module, and the DSP module determines whether the combustible gas content at the experimental site exceeds the standard and whether abnormal sounds occur; the electrical signal detection module is used for transmitting the level signals sent by the infrared sensor and the flame sensor to the DSP module, and the signal transmitted to the DSP module determines whether there are people who accidentally break into the site during the experiment and whether there is a device ignition phenomenon at the experimental site; the serial communication module is used for realizing data transmission through a serial port switch.

3. The converter transformer integrated protection system according to claim 2, characterized in that: The on-site monitoring system also includes a buzzer, which sends out an alarm signal when the DSP module determines that the combustible gas content exceeds the standard, an abnormal sound occurs, a person accidentally enters the site during the experiment operation, or a device ignites.

4. The converter transformer integrated protection system according to claim 3, characterized in that: The on-site monitoring system also includes: an identity authenticator, which is used to temporarily shield the buzzer from sending out an alarm signal when the staff enters the on-site maintenance under abnormal circumstances.

5. The converter transformer integrated protection system according to claim 1, characterized in that: The feedback control system includes: a feedback controller, a UPS power supply, a grounding detector, an overcurrent detector, a transformer oil level temperature controller, a transformer winding temperature controller and a serial port switch; The feedback controller includes a DSP module, a power supply module, an optical signal transmitting module, an optical signal receiving module and a serial communication module; the DSP module is used for the logic control of the feedback control system, and for receiving and sending various signal instructions; the power supply module is used for isolating and supplying power to various power chips and module peripherals; the serial communication module is used for realizing data transmission through a serial switch; UPS power supply is used to provide stable and uninterrupted power supply to the equipment. The battery power status is detected through the optical signal receiving module. When the battery power is good, the level signal converted by the optical signal receiving module is a high level signal. When the battery power alarm is triggered, the level signal converted by the optical signal receiving module is a low level signal. The optical signal receiving module sends the level signal to the DSP module, and the DSP module determines the power status of the UPS power supply by detecting the level signal. A grounding detector is used to detect the optical signal and send it to the optical signal receiving module, and the optical signal receiving module sends the optical signal to the DSP module; when the optical signal is detected, the DSP module determines that the grounding rod is connected, and when the optical signal is not detected, the DSP module determines that the grounding rod is disconnected; The overcurrent detector is used to detect the optical signal and send it to the optical signal receiving module, and the optical signal receiving module sends the optical signal to the DSP module; when the optical signal is detected, the DSP module determines that the overcurrent detection has been completed, and when the optical signal is not detected, the DSP module determines that the overcurrent detection has not been completed; Transformer oil level temperature controller: when the transformer oil level temperature is abnormal, the DSP module sends an optical signal through the optical signal transmission module to drive the cooling fan to run and cool the transformer oil tank; Transformer winding temperature controller: when the transformer winding temperature is abnormal, the DSP module sends an optical signal through the optical signal transmitting module to drive the cooling fan to cool the transformer oil tank.

6. The converter transformer integrated protection system according to claim 1, characterized in that: The data detection system includes a data detector, a transformer data terminal box, a transformer fault terminal box and a serial port switch; The data detector includes a DSP module, a power supply module, an ADC sampling module, an electrical signal detection module and a serial communication module; The DSP module is used for the logic control of the data detection system, and receives and sends various signal instructions; the power supply module is used to isolate and power a variety of power chips and module peripherals; the ADC sampling module is responsible for collecting the analog signal in the transformer data terminal box to the DSP module; The electrical signal detection module is used to detect the level signal sent by the transformer fault terminal box; The serial communication module is used to realize data transmission through a serial switch; The transformer data terminal box provides various operation data collection ports for the transformer, including the temperature of the transformer's three-phase winding, core temperature, clamp temperature, and oil tank temperature. The DSP module collects various data through the 4-20ma current sampling method. The transformer fault terminal box provides various fault signal collection ports for the transformer, including transformer light gas alarm, heavy gas tripping, liquid level alarm and pressure valve alarm. The DSP module determines the fault inside the transformer by detecting the level signal emitted by the terminal port.

7. The converter transformer integrated protection system according to claim 1, characterized in that: The remote monitoring system includes a login verification module, a system interface module, a data management module and a fault diagnosis module; Login verification module, which is used to verify the account and password, so that users with corresponding permissions can log in to the system to operate and view information; The system interface module is used to display the on-site monitoring system, data detection system and feedback control system in an interface manner, and to visualize the data and signals collected by each system; Data management module, used for data storage, data reading and data report generation. Users can selectively save transformer data, read corresponding data and save the data in the form of EXCEL table to the monitoring host; The fault diagnosis module is used to query the fault report and fault data table during the experiment operation, and also has the fault warning function.

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