A transformer system

Abstract

The utility model provides a transformer system, including main transformer body and monitoring loop, the monitoring loop includes alarm loop and tripping branch, alarm loop includes the first pole of power supply, first monitor, alarm and the second pole of power supply that connect in proper order, first monitor is located in main transformer body, in order to monitor the internal operation parameter of main transformer body, and when the operation parameter reaches first abnormal value, conduction triggers the alarm of alarm, tripping branch is connected with first monitor in series, and is connected with alarm in parallel, including second monitor and tripping device that connect in proper order, second monitor is located in transformer body, in order to monitor the operation parameter of main transformer body, and when the operation parameter changes from first abnormal value to second abnormal value, conduction triggers the tripping device tripping, in order to avoid the situation that the false tripping of single monitor failure or external interference leads to happens.

Description

Technical Field

[0001] This application relates to the field of power supply systems, and more particularly to a transformer system. Background Technology

[0002] In traditional transformer systems, the monitoring and protection mechanisms of the main transformer module have certain deficiencies. The internal equipment of the main transformer relies on tripping circuits for monitoring and protection, and the tripping operation is directly triggered by the monitor. In actual operation, monitor failures can lead to false tripping of the tripping circuit, which not only affects the normal power supply of the transformer system but may also damage the electrical equipment. Utility Model Content

[0003] In view of this, the purpose of this application is to propose a transformer system to solve the problem that in traditional transformer systems, the tripping circuit may trip erroneously due to a monitor malfunction, thereby affecting normal power supply and potentially damaging electrical equipment.

[0004] To achieve the above objectives, this application provides a transformer system, including a main transformer body and a monitoring circuit, wherein the monitoring circuit includes an alarm circuit and a trip branch;

[0005] The alarm circuit includes a first pole of the power supply, a first monitor, an alarm and a second pole of the power supply connected in sequence. The first monitor is located inside the main transformer body to monitor the internal operating parameters of the main transformer body, and triggers the alarm when the operating parameters reach a first abnormal value.

[0006] The trip branch is connected in series with the first monitor and in parallel with the alarm, including a second monitor and a tripping device connected in sequence. The second monitor is located in the transformer body to monitor the operating parameters of the main transformer body, and triggers the tripping device to trip when the operating parameters change from a first abnormal value to a second abnormal value.

[0007] Optionally, the monitoring circuit is an oil temperature monitoring circuit, the first monitor is a first oil thermometer, the first oil thermometer is connected to the alarm, and the alarm is triggered when the oil temperature inside the main transformer body reaches 85°C.

[0008] The second monitor is a second oil thermometer, which is connected to the tripping device and triggers the tripping device to trip when the oil temperature inside the main transformer changes from 85°C to 95°C.

[0009] Optionally, the monitoring circuit is a winding temperature monitoring circuit, the first monitor is a first winding thermometer, the first winding thermometer is connected to the alarm, and the alarm is triggered when the winding temperature in the main transformer body reaches 105°C.

[0010] The second monitor is a second winding thermometer, which is connected to the tripping device. When the winding temperature inside the main transformer changes from 105°C to 115°C, the second winding thermometer is activated to trigger the tripping device to trip.

[0011] Optionally, the monitoring circuit is a pressure monitoring circuit, the first monitor is a first pressure relay, the first pressure relay is connected to the alarm, and the alarm is triggered when the air pressure inside the main transformer reaches 50 kPa.

[0012] The second monitor is a second pressure relay, which is connected to the tripping device and triggers the tripping device to trip when the air pressure inside the main transformer changes from 50 kPa to 70 kPa.

[0013] Optionally, the monitoring circuit is a gas monitoring circuit, the first monitor is a first gas relay, the first gas relay is connected to the alarm, and the alarm is triggered when the gas parameter in the main transformer body reaches a first abnormal value;

[0014] The second monitor is a second gas relay, which is connected to the tripping device and triggers the tripping device to trip when the gas parameter in the main transformer body changes from a first abnormal value to a second abnormal value.

[0015] Optionally, a transformer system may further include a protection cabinet body, wherein the alarm, the tripping device, and the power supply are located within the protection cabinet body.

[0016] Optionally, a transformer system may further include an interface cabinet, which has multiple connection terminals for connecting the first monitor to the alarm, the second monitor to the alarm circuit, and the second monitor to the tripping device, respectively.

[0017] Optionally, multiple oil temperature monitoring circuits are configured and connected in parallel, respectively used to monitor the oil temperature in the upper and lower oil chambers of the main transformer body.

[0018] Optionally, multiple second pressure relays may be configured and connected in parallel.

[0019] Optionally, a transformer system may further include a data acquisition and transmission module, which is connected to both the first and second monitors and is used to acquire the operating parameters of the main transformer body in real time and transmit the data to a remote monitoring terminal.

[0020] As can be seen from the above, this application provides a transformer system, including a main transformer body and a monitoring circuit. The monitoring circuit includes an alarm circuit and a tripping branch. A first monitor in the alarm circuit monitors the internal operating parameters of the main transformer body. When the parameters reach a first abnormal value, the first monitor activates and triggers the alarm. That is, when the internal operating parameters of the main transformer body show an initial slight abnormality, the transformer system can issue an alarm in a timely manner, allowing maintenance personnel to promptly inspect and maintain the main transformer body, eliminate potential faults in advance, and avoid affecting the normal operation of the transformer system. A second monitor in the tripping branch activates and triggers the tripping device when the operating parameters within the main transformer body change from the first abnormal value to the second abnormal value. This allows the transformer system to take graded response measures according to the different degrees of abnormality within the main transformer body. That is, when the internal operating parameters of the main transformer body are slightly abnormal, the alarm circuit alerts maintenance personnel to the abnormal situation; when the internal operating parameters of the main transformer body are severely abnormal, the tripping device is activated to cut off the circuit and protect the transformer system. The trip branch is connected in series with the first monitor and in parallel with the alarm. That is, the trip branch can only be turned on after the first monitor detects that the operating parameters have reached the first abnormal value and triggers the alarm. This avoids false tripping caused by a single monitor failure or external interference, and greatly improves the stability and reliability of the transformer system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a transformer system shown in an embodiment of this application;

[0023] Figure 2 This is an enlarged view of the oil temperature monitoring circuit in the embodiments of this application;

[0024] Figure 3 This is an enlarged view of the winding temperature monitoring circuit in the embodiments of this application;

[0025] Figure 4 This is an enlarged view of the pressure monitoring circuit in an embodiment of this application.

[0026] Reference numerals in the attached diagram: 1. Main transformer body; 2. Monitoring circuit; 21. Alarm circuit; 211. Power supply; 212. First monitor; 213. Alarm; 22. Trip branch; 221. Second monitor; 222. Trip device; 3. Oil temperature monitoring circuit; 4. Winding temperature monitoring circuit; 5. Pressure monitoring circuit; 6. Gas monitoring circuit; 7. Protection cabinet body; 8. Interface cabinet. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] As mentioned in the background, in the field of pumped storage power stations, the transformer system plays a crucial role in ensuring the efficient transmission and conversion of electrical energy. As an important energy storage facility, the operation of pumped storage power stations is essential for maintaining the stability of the power system and regulating peak and off-peak electricity loads. The transformer system within the power station needs to meet frequent power conversion demands, rapidly switching between pumping and power generation modes to provide stable and reliable power support for high-power pump motors and generator motors.

[0030] However, traditional transformer systems have some shortcomings in monitoring and protection mechanisms. In pumped storage power stations, the main transformer operates under complex and harsh conditions for extended periods, yet the monitoring methods for its internal operating status remain relatively traditional. Existing systems heavily rely on single-step trip circuits, with the tripping operation directly triggered by a single monitor. This monitor is typically a single-point device responsible for measuring key parameters within the main transformer, such as temperature, pressure, or gas content. However, in the unique environment of a pumped storage power station, the monitor faces numerous challenges. Strong electromagnetic interference within the power station, mechanical vibrations from frequent equipment starts and stops, and the humid operating environment can all cause monitor malfunctions. Once a monitor fails, it may send erroneous signals to the tripping circuit. Upon receiving these erroneous signals, the tripping circuit will then trigger an unnecessary trip. Such unexpected tripping can have extremely serious consequences in pumped storage power stations. First, it severely disrupts the normal operation of the station. When the station is generating electricity, a trip may cause power outages, affecting the stability of the power grid and even triggering a chain reaction, leading to regional power supply fluctuations. In pumping mode, a trip may cause the pump units to stop running suddenly, potentially causing serious damage to the equipment and disrupting the entire power station's energy storage plan. In addition, frequent tripping increases equipment maintenance costs, shortens equipment lifespan, and greatly weakens the reliability and economy of the power station's operation.

[0031] Furthermore, erroneous tripping of transformer systems can damage electrical equipment connected to the power station. Sudden power outages and restarts subject these devices to voltage surges and electrical stresses, shortening their lifespan and increasing the likelihood of component failure. This not only leads to additional costs for equipment replacement and maintenance but also threatens the safe and stable operation of the entire power system.

[0032] To address the aforementioned problems, this application provides a transformer system.

[0033] The following is in conjunction with the appendix Figure 1-4 The embodiments of this application will be described in detail below.

[0034] like Figure 1 As shown, a transformer system includes a main transformer body 1 and a monitoring circuit 2, wherein the monitoring circuit 2 includes an alarm circuit 21 and a trip branch 22;

[0035] The alarm circuit 21 includes a first pole of a power supply 211, a first monitor 212, an alarm 213 and a second pole of the power supply 211 connected in sequence. The first monitor 212 is located inside the main transformer body 1 to monitor the internal operating parameters of the main transformer body 1, and to trigger the alarm 213 when the operating parameters reach a first abnormal value.

[0036] The trip branch 22 is connected in series with the first monitor 212 and in parallel with the alarm 213. It includes a second monitor 221 and a trip device 222 connected in sequence. The second monitor 221 is located inside the main transformer body 1 to monitor the operating parameters of the main transformer body 1, and triggers the trip device 222 to trip when the operating parameters change from a first abnormal value to a second abnormal value.

[0037] In addition, a transformer system also includes a protection cabinet body 7 and an interface cabinet 8. The alarm 213, the tripping device 222 and the power supply 211 are located inside the protection cabinet body 7. The interface cabinet 8 is provided with multiple connection terminals for connecting the first monitor 212 to the alarm 213, the second monitor 221 to the alarm circuit 21, and the second monitor 221 to the tripping device 222, respectively.

[0038] Specifically, to more accurately respond to abnormal situations of varying degrees, the tripping branch 22 is designed in a hierarchical manner. Multiple tripping branches 22 can be configured in parallel, each equipped with a second monitor 221 and a tripping device 222. The tripping thresholds of the tripping devices 222 on different tripping branches 22 are different, thus classifying the tripping devices 222 into primary and secondary tripping devices. During actual operation, when the operating parameters of the main transformer 1 reach the second abnormal value, the second monitor 221 on the corresponding primary tripping branch 22 is activated, triggering the primary tripping device to disconnect some non-critical load circuits, thereby limiting the scope of the fault and maintaining some system functions. When the operating parameters further deteriorate to the third abnormal value, the second monitor 221 on the corresponding secondary tripping branch 22 is activated, triggering the secondary tripping device to disconnect more load circuits or even the entire main transformer's power supply circuit, fully protecting equipment and personnel safety. With this tiered tripping design, the system can respond appropriately according to the degree of abnormality, thereby improving the stability and safety of transformer operation.

[0039] Additionally, the tripping device 222 in the tripping branch 22 can be connected to a time delay module, such as a BD600 digital timer. When the second monitor 221 detects that the operating parameters have reached the corresponding abnormal value and are activated, the time delay module on the tripping device 222 starts timing. If the parameters do not return to normal within the set time (e.g., 5 seconds), the tripping device 222 is triggered to trip; if the parameters return to normal within the set time, the tripping is not triggered. This effectively reduces unnecessary tripping caused by brief interference and improves the stability of system operation.

[0040] An intelligent control unit, such as a Siemens S7-1200 series programmable logic controller, can be added inside the protection cabinet body 7. This intelligent control unit is connected to the alarm 213, trip device 222, and various monitors. It can not only receive data from the monitors in real time but also remotely control the alarm 213 and trip device 222 according to preset strategies. For example, maintenance personnel can connect to the intelligent control unit via a remote terminal to take preventative action when potential anomalies are detected but have not yet reached alarm or trip thresholds, thus preventing faults from occurring. Simultaneously, the intelligent control unit can monitor the operating status of the alarm 213 and trip device 222 in real time, issuing timely warnings upon detecting equipment failures. The protection cabinet body 7 also has a backup power supply, automatically switching to the backup power supply when power supply 211 fails, ensuring continuous power supply to monitoring circuit 2.

[0041] A communication interface module, such as an SG485 communication interface conversion module, is added to interface cabinet 8. This module connects to various monitors, alarms 213, tripping devices 222, and the intelligent control unit within the protection cabinet via connection terminals. The communication interface module supports multiple communication protocols, such as MODBUS and TCP / IP, facilitating data exchange with external monitoring systems. Through the communication interface module, external monitoring systems can obtain real-time data such as the transformer system's operating parameters, alarm information, and tripping status, enabling remote monitoring and management.

[0042] In this embodiment, the monitoring circuit 2 includes an alarm circuit 21 and a trip branch 22. The first monitor 212 in the alarm circuit 21 monitors the internal operating parameters of the main transformer body 1. When the parameters reach a first abnormal value, the first monitor 212 activates and triggers the alarm 213. That is, when the internal operating parameters of the main transformer body 1 show an initial slight abnormality, the transformer system can issue an alarm in a timely manner, allowing maintenance personnel to promptly inspect and maintain the main transformer body 1, eliminate potential faults in advance, and avoid affecting the normal operation of the transformer system. The second monitor 221 in the trip branch 22 activates and triggers the trip device 222 to trip when the operating parameters within the main transformer body 1 change from the first abnormal value to the second abnormal value. This allows the transformer system to take graded response measures according to the degree of abnormality within the main transformer body 1. Specifically, when the internal operating parameters of the main transformer body 1 are slightly abnormal, the alarm circuit 21 alerts maintenance personnel to the abnormal situation; when the internal operating parameters of the main transformer body 1 are severely abnormal, the trip device 222 is activated to cut off the circuit and protect the transformer system. The trip branch 22 is connected in series with the first monitor 212 and in parallel with the alarm 213. That is, the trip branch 22 can only be turned on after the first monitor 212 detects that the operating parameters have reached the first abnormal value and triggers the alarm 213. This avoids the situation of false tripping due to the failure of a single monitor or external interference, and greatly improves the stability and reliability of the transformer system.

[0043] In some embodiments, such as Figure 1 and Figure 2 As shown, the monitoring circuit 2 is an oil temperature monitoring circuit 3, the first monitor 212 is a first oil temperature gauge, the first oil temperature gauge is connected to the alarm 213, and the alarm 213 is triggered when the oil temperature inside the main transformer body 1 reaches 85°C.

[0044] The second monitor 221 is a second oil thermometer, which is connected to the tripping device 222. When the oil temperature inside the main transformer body 1 changes from 85°C to 95°C, the tripping device 222 is triggered to trip.

[0045] In addition, the oil temperature monitoring circuit 3 is configured in multiple ways and connected in parallel, respectively used to monitor the oil temperature in the upper oil chamber and the lower oil chamber of the main transformer body.

[0046] Specifically, oil temperature monitoring circuit 3 is used to monitor the temperature of the insulating oil inside the main transformer body 1, preventing excessively high temperatures that could affect the operation of the transformer system. The first and second oil thermometers can be intelligent oil thermometers. These intelligent oil thermometers are equipped with sensors, allowing them to not only monitor oil temperature but also acquire other oil parameters such as viscosity and water content. These parameters are transmitted to the intelligent control unit within the protection cabinet via a communication module. The intelligent control unit utilizes this multi-dimensional data to more accurately assess the internal operating status of the main transformer body 1. For example, if the oil temperature rises while the water content of the insulating oil also exceeds the normal range, the intelligent control unit can determine that there may be an internal insulation moisture problem and issue more detailed early warning information. This not only indicates the abnormal oil temperature but also points out possible causes of the fault, providing more valuable reference for maintenance personnel and facilitating faster and more accurate troubleshooting and resolution.

[0047] In this embodiment, when the internal oil temperature of the main transformer body 1 reaches 85°C, the first oil thermometer quickly activates the alarm 213, indicating that in the early stage of a potential thermal fault inside the main transformer body 1, the transformer system promptly sends a warning signal to the maintenance personnel, effectively preventing more serious damage to the main transformer body 1 due to continuous temperature increases. When the second oil thermometer inside the main transformer body 1 activates the tripping device 222 when the oil temperature changes from 85°C to 95°C, the tripping device 222 trips. At this time, the tripping device 222 can quickly cut off the power supply 211, preventing serious faults such as insulation breakdown and short circuits caused by overheating in the main transformer body 1, thereby protecting the core components inside the main transformer body 1, extending the service life of the equipment, reducing equipment maintenance costs, and minimizing power outage losses caused by equipment failure. The trip branch 22 is connected in parallel with the alarm 213 and in series with the first oil thermometer. That is, the trip branch 22 can only be turned on after the first oil thermometer triggers the alarm 213. This avoids false tripping caused by the failure of the second oil thermometer or external interference, and greatly improves the stability and reliability of oil temperature monitoring in the transformer system.

[0048] In addition, by setting up multiple parallel oil temperature monitoring loops 3, the oil temperature of the upper and lower oil cavities within the main transformer body 1 is monitored separately, thereby obtaining oil temperature data at different locations inside the main transformer body 1. The oil temperature of the upper oil cavity mainly reflects the heat dissipation of the top and surrounding areas of the transformer windings, while the oil temperature of the lower oil cavity reflects the heating status of the iron core and the bottom of the windings. This allows maintenance personnel to have a comprehensive understanding of the oil temperature distribution inside the main transformer body 1, thereby accurately determining the location of faulty equipment within the main transformer body 1.

[0049] In some embodiments, such as Figure 1 and Figure 3As shown, the monitoring circuit 2 is a winding temperature monitoring circuit 4, the first monitor 212 is a first winding thermometer, the first winding thermometer is connected to the alarm 213, and the alarm 213 is triggered when the winding temperature in the main transformer body 1 reaches 105°C.

[0050] The second monitor 221 is a second winding thermometer, which is connected to the tripping device 222. When the winding temperature in the main transformer body 1 changes from 105°C to 115°C, the second winding thermometer is activated to trigger the tripping device 222 to trip.

[0051] Specifically, the winding temperature monitoring circuit 4 can be configured in parallel as multiple groups to monitor the temperature of the windings at different parts of the main transformer body 1, such as the beginning, middle, and end of the winding. During transformer operation, the temperature of the windings at different locations may vary due to factors such as current distribution and heat dissipation conditions. By monitoring the windings at multiple locations, a more comprehensive understanding of the winding temperature distribution can be obtained. For example, during high-load operation, the temperature at the beginning of the winding may rise rapidly due to the large starting current, while the temperature changes at the middle and end are relatively gradual. Multi-location monitoring can promptly detect these temperature differences, providing more accurate data for determining whether there are local anomalies in the windings.

[0052] In this embodiment, when the internal winding temperature of the main transformer body 1 reaches 105°C, the first winding thermometer quickly activates the alarm 213, indicating an early stage of potential faults in the windings of the main transformer body 1. This timely alerts maintenance personnel, effectively preventing further damage to the windings due to continued temperature increases. When the second winding thermometer inside the main transformer body 1 activates the tripping device 222 when the winding temperature changes from 105°C to 115°C, the tripping device 222 trips, quickly cutting off the power supply 211. This effectively prevents catastrophic faults such as insulation breakdown and short circuit fires caused by overheating, protecting core components such as the transformer windings and core. This significantly extends the transformer's service life and reduces high maintenance costs and economic losses caused by prolonged power outages due to severe equipment damage. The trip branch 22 is connected in parallel with the alarm 213 and in series with the first winding thermometer. That is, the trip branch 22 can only be turned on after the first winding thermometer triggers the alarm 213. This avoids false tripping caused by the failure of the second winding thermometer or external interference, and greatly improves the stability and reliability of the winding temperature monitoring of the transformer system.

[0053] In some embodiments, such as Figure 1 and Figure 4As shown, the monitoring circuit 2 is a pressure monitoring circuit 5, the first monitor 212 is a first pressure relay, the first pressure relay is connected to the alarm 213, and triggers the alarm 213 when the air pressure in the main transformer body 1 reaches 50kPa.

[0054] The second monitor 221 is a second pressure relay, which is connected to the tripping device 222. When the air pressure inside the main transformer body 1 changes from 50 kPa to 70 kPa, the second pressure relay is activated to trigger the tripping device 222 to trip.

[0055] In addition, multiple second pressure relays are configured in parallel to improve the reliability of pressure monitoring and tripping action.

[0056] Specifically, the first and second pressure relays can be connected to a pressure rate monitoring module. This module consists of a connected pressure sensor and a digital signal processor, used to collect pressure data from the first and second pressure relays at different points in time and calculate the pressure change rate. When the pressure change rate exceeds a preset threshold (e.g., an increase of 5 kPa per minute), an early warning signal is triggered even if the pressure has not yet reached the 50 kPa alarm value. This helps to detect abnormal pressure changes in advance, which may indicate a sudden fault inside the transformer, giving maintenance personnel more time to take emergency measures.

[0057] In this embodiment, when the internal air pressure of the main transformer body 1 reaches 50 kPa, the first pressure relay quickly activates the alarm 213, indicating an early stage of potential air pressure failure within the main transformer body 1. This timely alerts maintenance personnel, effectively preventing further damage to the main transformer body due to continuously rising pressure. When the second pressure relay inside the main transformer body 1 activates the tripping device 222 to trip when the internal air pressure changes from 50 kPa to 70 kPa, the tripping device 222 prevents the main transformer body 1 from continuing to operate under dangerous conditions of excessively high air pressure. This avoids serious consequences such as rupture or damage to the main transformer body casing due to excessively high air pressure, thereby protecting the main transformer body and other connected electrical equipment, reducing the risk of equipment damage, lowering maintenance costs, and mitigating economic losses from power outages. The trip branch 22 is connected in parallel with the alarm 213 and in series with the first pressure relay. That is, the trip branch 22 can only be turned on after the first pressure relay triggers the alarm 213. This avoids false tripping caused by the failure of the second pressure relay or external interference, and greatly improves the stability and reliability of the air pressure monitoring of the transformer system.

[0058] In some embodiments, such as Figure 1As shown, the monitoring circuit 2 is a gas monitoring circuit 6, the first monitor 212 is a first gas relay, the first gas relay is connected to the alarm 213, and when the gas parameter in the main transformer body 1 reaches the first abnormal value, the alarm 213 is triggered to sound an alarm.

[0059] The second monitor 221 is a second gas relay, which is connected to the tripping device 222. When the gas parameter in the main transformer body 1 changes from a first abnormal value to a second abnormal value, the second gas relay is activated to trigger the tripping device 222 to trip.

[0060] Specifically, the oil temperature monitoring circuit 3, winding temperature monitoring circuit 4, pressure monitoring circuit 5, and gas monitoring circuit 6 are connected in parallel to comprehensively and in real-time monitor multiple key operating parameters inside the main transformer body 1. Oil temperature monitoring circuit 3 monitors the temperature of the insulating oil inside the main transformer body 1, reflecting the heat dissipation and load conditions of the equipment within the main transformer body 1; winding temperature monitoring circuit 4 monitors the winding temperature inside the main transformer body 1 to ensure winding safety; pressure monitoring circuit 5 monitors the gas pressure status inside the main transformer body 1 to prevent faults caused by abnormal pressure; and gas monitoring circuit 6 monitors the gas parameters inside the main transformer body to confirm whether there are faults such as discharge or overheating inside the main transformer body. With each circuit operating simultaneously, it comprehensively covers the key indicators of transformer operation, allowing maintenance personnel to obtain multi-dimensional data in real time, fully understand the transformer's operating status, and promptly detect potential anomalies.

[0061] In this embodiment, abnormal changes in gas parameters are one of the signals of potential faults within the transformer. When the gas parameters inside the main transformer body 1 reach a first abnormal value, the first gas relay quickly activates, triggering the alarm 213. This means that in the early stages of a potential fault within the main transformer body 1, the transformer system promptly sends a warning signal to maintenance personnel, effectively preventing further damage to the internal equipment of the main transformer body. When the second gas relay inside the main transformer body 1 activates, triggering the tripping device 222, it trips when the gas parameters change from the first abnormal value to the second abnormal value. The tripping device 222's operation at this time prevents further damage to the internal equipment of the main transformer body, reducing maintenance costs. The tripping branch 22 is connected in parallel with the alarm 213 and in series with the first gas relay. This means that the tripping branch 22 can only activate after the first gas relay triggers the alarm 213, preventing false tripping due to a faulty second gas relay or external interference, greatly improving the stability and reliability of gas monitoring in the transformer system.

[0062] In some embodiments, a transformer system further includes a data acquisition and transmission module, which is connected to both the first monitor 212 and the second monitor 221, and is used to acquire the operating parameters of the main transformer body 1 in real time and transmit the data to a remote monitoring terminal.

[0063] In this embodiment, the data acquisition and transmission module can be a data acquisition device. The data acquisition device is connected to both the first monitor 212 and the second monitor 221. It is used to collect the operating parameters of the main transformer body 1 in real time and transmit the data to the remote monitoring terminal so that the operation and maintenance personnel can reasonably arrange the equipment inspection and maintenance plan based on the data from the remote monitoring terminal.

[0064] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0065] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0066] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0067] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the claims of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A transformer system, comprising a main transformer body (1) and a monitoring circuit (2), characterized in that, The monitoring circuit (2) includes an alarm circuit (21) and a trip branch (22); The alarm circuit (21) includes a first pole of a power supply (211), a first monitor (212), an alarm (213), and a second pole of the power supply (211) connected in sequence. The first monitor (212) is located inside the main transformer body (1) to monitor the internal operating parameters of the main transformer body (1) and to trigger the alarm (213) when the operating parameters reach a first abnormal value. The trip branch (22) is connected in series with the first monitor (212) and in parallel with the alarm (213), including a second monitor (221) and a trip device (222) connected in sequence. The second monitor (221) is located inside the main transformer body (1) to monitor the operating parameters of the main transformer body (1) and to trigger the trip device (222) to trip when the operating parameters change from a first abnormal value to a second abnormal value.

2. The transformer system according to claim 1, characterized in that, The monitoring circuit (2) is an oil temperature monitoring circuit (3), the first monitor (212) is a first oil temperature gauge, the first oil temperature gauge is connected to the alarm (213), and the alarm (213) is triggered when the oil temperature inside the main transformer body (1) reaches 85°C. The second monitor (221) is a second oil thermometer, which is connected to the tripping device (222) and triggers the tripping device (222) to trip when the oil temperature inside the main transformer body (1) changes from 85°C to 95°C.

3. A transformer system according to claim 1, characterized in that, The monitoring circuit (2) is a winding temperature monitoring circuit (4), the first monitor (212) is a first winding thermometer, the first winding thermometer is connected to the alarm (213), and triggers the alarm (213) when the winding temperature in the main transformer body (1) reaches 105°C. The second monitor (221) is a second winding thermometer, which is connected to the tripping device (222) and triggers the tripping device (222) to trip when the winding temperature in the main transformer body (1) changes from 105°C to 115°C.

4. A transformer system according to claim 1, characterized in that, The monitoring circuit (2) is a pressure monitoring circuit (5), the first monitor (212) is a first pressure relay, the first pressure relay is connected to the alarm (213), and triggers the alarm (213) when the air pressure in the main transformer body (1) reaches 50kPa. The second monitor (221) is a second pressure relay, which is connected to the tripping device (222) and triggers the tripping device (222) to trip when the air pressure in the main transformer body (1) changes from 50 kPa to 70 kPa.

5. A transformer system according to claim 1, characterized in that, The monitoring circuit (2) is a gas monitoring circuit (6), the first monitor (212) is a first gas relay, the first gas relay is connected to the alarm (213), and when the gas parameter in the main transformer body (1) reaches the first abnormal value, the alarm (213) is triggered to sound an alarm. The second monitor (221) is a second gas relay, which is connected to the tripping device (222) and triggers the tripping device (222) to trip when the gas parameter in the main transformer body (1) changes from a first abnormal value to a second abnormal value.

6. A transformer system according to claim 1, characterized in that, It also includes a protection cabinet body (7), and the alarm (213), the tripping device (222) and the power supply (211) are located inside the protection cabinet body (7).

7. A transformer system according to claim 1, characterized in that, It also includes an interface cabinet (8), which is provided with multiple connection terminals for connecting the first monitor (212) to the alarm (213), the second monitor (221) to the alarm circuit (21), and the second monitor (221) to the tripping device (222), respectively.

8. A transformer system according to claim 2, characterized in that, The oil temperature monitoring circuit (3) is configured in multiple ways and connected in parallel, and is used to monitor the oil temperature in the upper oil chamber and the lower oil chamber of the main transformer body (1).

9. A transformer system according to claim 4, characterized in that, The second pressure relay is configured in multiple units and connected in parallel.

10. A transformer system according to claim 1, characterized in that, It also includes a data acquisition and transmission module, which is connected to both the first monitor (212) and the second monitor (221) and is used to collect the operating parameters of the main transformer body (1) in real time and transmit the data to the remote monitoring terminal.

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