Detection device of intelligent transformer

Abstract

The utility model relates to the field of detection, and particularly discloses a detection device of an intelligent transformer, which comprises a central processing module, a transformer information monitoring module, a temperature monitoring module, an environment temperature and humidity monitoring module, an intelligent cooling control module and a GOOSE communication module. The central processing module is connected with the transformer information monitoring module, the temperature monitoring module, the environment temperature and humidity monitoring module, the intelligent cooling control module and the GOOSE communication module. The transformer information monitoring module, the temperature monitoring module, the environment temperature and humidity monitoring module, the intelligent cooling control module and the GOOSE communication module are all installed at corresponding monitoring positions of a transformer and used for monitoring the working condition of the transformer in real time and collecting corresponding parameters. According to the utility model, the intelligent cooling control module can realize automatic control, remote forced control, protection automatic removal control, automatic input control during power failure and failure and the like of a cooling system.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and more specifically, to a detection device for an intelligent transformer. Background Technology

[0002] With the continuous expansion of power grid scale and the rapid development of intelligent technologies, transformers, as crucial equipment in the power system, undertake key tasks such as voltage transformation, power transmission, and distribution. The reliability of their operation directly affects the stability and power supply quality of the entire power network, making fault detection and early warning technologies particularly important. Traditional detection methods often suffer from low accuracy and poor stability, making it difficult to meet the requirements of modern power grids for rapid fault response and precise fault location, which poses a significant threat to the safety of the distribution network.

[0003] Therefore, intelligent transformer detection devices have emerged. This utility model proposes an intelligent transformer detection device, which is mainly used for online monitoring and control of transformers. The device collects oil temperature, coil temperature, current and cooler status through current sensors, PT1000, switch quantity and communication modules. After comprehensive calculation and analysis of the working condition of the transformer cooling system, the data can be remotely transmitted to the host computer for centralized processing, ensuring the normal operation of the cooling system and achieving the purpose of extending the service life of the transformer cooling system and ensuring the safety of transformer operation. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent transformer detection device to solve the problems of low accuracy and poor stability of traditional transformer detection methods mentioned in the background art, which are difficult to meet the requirements of modern power grids for rapid fault response and accurate fault location.

[0005] The technical solution of this utility model is: a detection device for an intelligent transformer, including a central processing unit module, a transformer information monitoring module, a temperature monitoring module, an ambient temperature and humidity monitoring module, an intelligent cooling control module, and a GOOSE communication module; the central processing unit module is used to receive and process signals from each module, and analyze and process data according to a preset algorithm;

[0006] The transformer information monitoring module is used to monitor the transformer's operating status in real time, including parameters such as voltage, current, load, and oil temperature, and transmit the monitoring data to the central processing unit module.

[0007] The temperature monitoring module is used to monitor the temperature parameters of the transformer, including the temperature inside the transformer and the temperature of the external environment, and transmit the temperature data to the central processing unit module.

[0008] The environmental temperature and humidity monitoring module is used to monitor the temperature and humidity of the environment where the transformer is located in real time, ensuring that the transformer operates under safe environmental conditions;

[0009] The intelligent cooling control module automatically adjusts the operation of the cooling system based on the temperature data received from the signal and the transformer's operating status to optimize the transformer's working environment.

[0010] The GOOSE communication module is used to communicate with other smart devices or systems via industrial network protocols to ensure real-time information transmission and remote monitoring functions.

[0011] The central processing unit module interacts with the transformer information monitoring module, temperature monitoring module, ambient temperature and humidity monitoring module, intelligent cooling control module, and GOOSE communication module via signal connection, and generates alarm, control, or optimization commands based on the comprehensive data.

[0012] Furthermore, the central processing unit module adopts a dual power supply module, which supports AC and DC adaptive input and can seamlessly switch when one side loses power or fails, avoiding the situation where transformer faults cannot be detected during power outages.

[0013] Further transformer information monitoring modules include CT current sensors, tap changer sensors, and electrical parameter sensors.

[0014] Furthermore, the CT current sensor collects the secondary current of the transformer CT, and uses the CT current value to calculate the winding and bushing currents. The transformer load is calculated by measuring the secondary CT current Is on the transformer grid side and calculating the primary current value based on the CT ratio K. This primary current value is then compared with the rated current Inx corresponding to the tap position X to calculate the current operating load L of the transformer. The calculation formula is as follows:

[0015] ;

[0016] Furthermore, by using the tap changer sensor, the current position information of the tap can be obtained by acquiring the BCD code through the switch input.

[0017] Furthermore, the electrical parameter sensor is a three-phase energy meter, used to measure electrical energy parameters.

[0018] Furthermore, the transformer information monitoring module collects signals such as tap position, transformer load status, fan operating status, and transformer current and voltage through analog and digital inputs, and displays the transformer's current status on the touchscreen. Warnings or indications can be given through color changes or flashing. Specific important data can also be recorded long-term on the touchscreen and displayed as historical curves.

[0019] Furthermore, the temperature monitoring module typically uses a three-wire PT100 method to acquire data or converts it to a 4-20mA current signal for acquisition. Temperature sensors are placed inside the transformer oil, on the windings, and at ambient temperature to measure temperature parameters, which are then transmitted to the central processing unit module.

[0020] Furthermore, the environmental temperature and humidity monitoring module transmits data to the central processing unit (CPU) module via I2C. The CPU module transmits data to the touchscreen via an RS485 bus, using an RS485 serial port for communication. The CPU module communicates with the host computer using the IEC61850 GOOSE fast insulation communication protocol, utilizing retransmission and keep-alive mechanisms to ensure communication reliability. Configurable analog and switch status datasets can be used for data communication with the main control system. GOOSE communication simultaneously supports cross-connection on the main control side or the IED side in dual-configuration scenarios.

[0021] The beneficial effects of this utility model are: the intelligent cooling control module can realize automatic control, remote forced control, automatic protection cut-off control, and automatic activation control in case of power failure or fault of the cooling system; the temperature monitoring module collects temperature signals and automatically turns on the cooler if the temperature is higher than the set temperature; the transformer information monitoring module can also collect load signals and automatically turn on the cooler if an abnormality occurs, and can realize dual control of the transformer cooler, increasing the reliability of the system. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating the operation of the intelligent transformer testing device of this utility model.

[0023] Figure 2 This is a circuit board layout diagram of the intelligent transformer detection device of this utility model.

[0024] In the diagram: 1. Transformer; 2. Transformer information monitoring module; 3. Temperature monitoring module; 4. Intelligent cooling control module; 5. Ambient temperature and humidity monitoring module; 6. CT current sensor; 7. Tap changer sensor; 8. Electrical parameter sensor; 9. Central processing unit module; 10. GOOSE communication module; 11. Host computer; 12. Touch screen. Detailed Implementation

[0025] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0026] like Figure 1 , Figure 2 As shown, a smart transformer detection device includes a transformer information monitoring module 2, a temperature monitoring module 3, a smart cooling control module 4, an ambient temperature and humidity monitoring module 5, a central processing unit module 9, and a GOOSE communication module 10. These parts are all prior art. This utility model only protects the interconnection structure and does not protect the method or detection method.

[0027] Central processing unit module 9 is used to receive and process signals from various modules, and to analyze and process data according to preset algorithms;

[0028] The transformer information monitoring module 2 is used to monitor the operating status of transformer 1 in real time, including parameters such as voltage, current, load, and oil temperature, and transmit the monitoring data to the central processing unit module 9.

[0029] Temperature monitoring module 3 is used to monitor the temperature parameters of transformer 1, including the temperature of the internal and external environment of transformer 1, and transmit the temperature data to central processing unit module 9.

[0030] The environmental temperature and humidity monitoring module 5 is used to monitor the temperature and humidity of the environment where the transformer 1 is located in real time, so as to ensure that the transformer 1 operates under safe environmental conditions.

[0031] The intelligent cooling control module 4 automatically adjusts the operation of the cooling system based on the temperature data received from the signal and the working status of the transformer 1, so as to optimize the working environment of the transformer 1.

[0032] GOOSE communication module 10 is used to communicate data with other smart devices or systems through industrial network protocols to ensure real-time information transmission and remote monitoring functions.

[0033] The central processing unit module 9 interacts with the transformer information monitoring module 2, temperature monitoring module 3, ambient temperature and humidity monitoring module 5, intelligent cooling control module 4, and GOOSE communication module 10 via signal connections, and generates alarm, control, or optimization commands based on the comprehensive data. That is, the output terminals of the transformer information monitoring module 2, temperature monitoring module 3, ambient temperature and humidity monitoring module 5, and intelligent cooling control module 4 are all connected to the input terminal of the central processing unit module 9, and the output terminal of the central processing unit module 9 is connected to at least the GOOSE communication module 10.

[0034] The intelligent transformer detection device needs to fully consider the actual situation and user needs, select appropriate sensors and supporting facilities, and develop corresponding software and communication methods to achieve accurate and reliable detection of the real-time status of transformer 1 and improve the safety and reliability of transformer 1 operation.

[0035] In this example, the central processing unit module 9 adopts a dual power supply module with dual AC / DC adaptive power supply, which can seamlessly switch when one side loses power or fails, avoiding the situation where transformer 1 cannot be monitored during power failure.

[0036] In this example, the transformer information monitoring module 2 includes a CT current sensor 6, a tap changer sensor 7, and an electrical parameter sensor 8.

[0037] In this example, the CT current sensor 6 collects the secondary current of the transformer CT. The CT current value is used to calculate the winding and bushing currents. The transformer load is calculated by measuring the secondary CT current Is on the transformer grid side and calculating the primary current value based on the CT ratio K. This primary current value is then compared with the rated current Inx corresponding to the tap position X to calculate the current load L of the transformer. The calculation formula is as follows:

[0038] ;

[0039] In this example, the tap changer sensor 7 can obtain the current position information of the tap by acquiring the BCD code through the switch quantity.

[0040] In this example, the electrical parameter sensor 8 is a three-phase energy meter used to measure electrical energy parameters.

[0041] In this example, the transformer information monitoring module 2 collects signals such as tap position, transformer 1 load status, fan operating status, and transformer 1 current and voltage through analog and digital signals, and sends these signals to the display module. The current status of transformer 1 is displayed on the touch screen 12, and warnings or indications can be given through color changes or flashing. Specific important data can also be recorded long-term on the touch screen 12 and displayed as historical curves.

[0042] In this example, the temperature monitoring module 3 typically uses a three-wire PT100 method to acquire data or converts it to a 4-20mA current signal. Temperature sensors are placed in the transformer oil inside transformer 1, on the windings, and at ambient temperature to measure temperature parameters, which are then transmitted to the central processing unit module.

[0043] In this example, the intelligent cooling control module 4 can realize automatic control, remote forced control, automatic protection disconnection control, and automatic activation control in case of power failure or fault in the cooling system. The intelligent cooling control module 4 includes a cooling fan controller, an oil pump controller, and a coolant flow sensor assembly. If the temperature signal collected by the intelligent cooling control module 4 exceeds the set temperature, the cooler will automatically start. It can also collect load signals through the transformer information monitoring module 2; if an anomaly occurs, the cooler will automatically start. When the transformer is energized and its operating conditions remain unchanged for a long period, to prevent some coolers from running for extended periods while others remain idle, the system will rotate the coolers according to a set cycle. When the transformer is not energized for a long time, to prevent problems such as corrosion or ball bearing damage that may occur due to prolonged disuse of the cooler groups, the system will sequentially inspect the coolers according to a set cycle. The system prioritizes starting coolers with shorter operating times and prioritizes stopping coolers with longer operating times. The cooler operating time is displayed on the touchscreen interface. When the system attempts to start a cooler group but receives no feedback signal, it will start another cooler group and issue a cooler fault alarm message. If one cooler unit fails and no additional cooler unit is available, a "System has no redundant cooling capacity" alarm signal will be generated, and an alarm message will be displayed. The system can be configured with two intelligent control cooling modules to achieve redundant cooling control of the transformer. The intelligent control cooling module that starts normally first is designated as the active side, controlling the start and stop of the cooler according to operating conditions. When the active side malfunctions or no longer has cooling capacity, the inactive side switches to the active side and gains control of the cooler, achieving dual control of the transformer cooler and increasing system reliability.

[0044] In this example, the ambient temperature and humidity monitoring module 5 is connected to the central processing unit (CPU) module 9 via an I2C bus, meaning the ambient temperature and humidity monitoring module 5 transmits data to the CPU module 9 via I2C. The CPU module 9 transmits data to the touchscreen 12 via an RS485 bus, using an RS485 serial port. The CPU module 9 communicates with the host computer 11 via the IEC61850 GOOSE communication module 10's fast heat preservation communication protocol, utilizing retransmission and keep-alive mechanisms to ensure communication reliability. Configurable analog data sets and switch status data sets can be used for data communication with the main control system. GOOSE communication simultaneously supports cross-connection on the main control side or cross-connection on the IED side with dual configurations.

[0045] It should be noted that, Figure 2 From left to right, the components are: power supply module, central processing module and GOOSE communication module, sensor acquisition module, PT100 temperature acquisition module, first switch board input signal, second switch board input signal, first switch board output signal, second switch board output signal, and AC signal board.

[0046] The embodiments of the present utility model have been described above. However, the present embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make more equivalent embodiments under the guidance of the present embodiments, and all of them are within the protection scope of the present embodiments.

Claims

1. A detection device of a smart transformer, characterized in that, Includes a central processing unit module, a transformer information monitoring module, a temperature monitoring module, an intelligent cooling control module, and a GOOSE communication module; The output terminals of the transformer information monitoring module, temperature monitoring module, ambient temperature and humidity monitoring module, and intelligent cooling control module are all connected to the input terminal of the central processing unit module. The output terminal of the central processing unit module is connected to at least the GOOSE communication module.

2. The detection device of a smart transformer according to claim 1, characterized in that, The central processing unit module adopts a dual power supply module and supports AC / DC adaptive input; the transformer information monitoring module includes a CT current sensor, a tap changer sensor, and an electrical parameter sensor.

3. The detection device of a smart transformer according to claim 2, characterized in that, The CT current sensor collects the secondary current of the transformer CT.

4. The detection device of a smart transformer according to claim 3, characterized in that, The electrical parameter sensor is a three-phase energy meter used to measure electrical energy parameters.

5. The detection device of a smart transformer according to claim 4, characterized in that, The transformer information monitoring module collects tap position, transformer load status, fan operating status, and transformer current and voltage signals through analog and digital signals, and sends the signals to the display module.

6. The detection device of a smart transformer according to claim 5, characterized in that, The temperature monitoring module uses a three-wire PT100 temperature sensor to acquire temperature data and converts the acquired temperature signal into a 4-20mA current signal, which is then transmitted to the central processing unit module.

7. The detection device of a smart transformer according to claim 6, characterized in that, The temperature monitoring module includes multiple sets of temperature sensors, which are respectively arranged in the transformer oil inside the transformer, on the windings, and in the external environment of the transformer, for real-time measurement and transmission of the corresponding temperature parameters.

8. The detection device of a smart transformer according to claim 6, characterized in that, The intelligent cooling control module includes a cooling fan controller, an oil pump controller, and a coolant flow sensor assembly.

9. The detection device of a smart transformer according to claim 7, characterized in that, The central processing unit module communicates with the host computer via the IEC61850 GOOSE communication module fast heat preservation communication protocol.

10. The detection device of a smart transformer according to claim 7, characterized in that, The environmental temperature and humidity monitoring module is connected to the central processing unit module via an I2C bus; the central processing unit module transmits data to the touch screen for display via an RS485 serial bus; the central processing unit module also communicates with the host computer via the IEC 61850 GOOSE fast insulation communication protocol, employing a retransmission mechanism and a keep-alive mechanism. The central processing unit module can be configured to exchange analog data sets and switch status data sets with the main control system, and the GOOSE communication supports dual configuration, including cross-connection on the main control side or cross-connection on the IED side.

Images