Transformer intelligent cooling visual measurement and control system

Abstract

The utility model provides a transformer intelligent cooling visualization measurement and control system. The transformer intelligent cooling visualization measurement and control system comprises a transformer body, a transformer cooler, a transformer body monitoring unit, a transformer cooler monitoring unit, an environment monitoring unit, a controller, a communication unit and a man-machine interaction unit. The transformer main body monitoring unit is arranged on the transformer main body; the transformer cooler monitoring unit is arranged on the transformer cooler; the environment monitoring unit is used for at least obtaining the temperature of the external environment. The controller is connected with the transformer cooler, the transformer main body monitoring unit, the transformer cooler monitoring unit and the environment monitoring unit; and the man-machine interaction unit is connected with the controller through the communication unit. According to the utility model, the problems that the traditional cooling control system does not comprehensively detect and judge the transformer, the transformer cooler and the surrounding environment and cannot effectively judge the operation safety of the transformer and preventively prompt faults are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer cooler control, in particular to a transformer intelligent cooling visualization measurement and control system. Background Art

[0002] Smart grid is the latest development direction of the world's power system and is considered to be an important scientific and technological innovation and development trend of the power system in the 21st century. With the deepening reform of the power system management system, substation automation technology has continued to advance. Among them, the transformer is a very important component, and its safe operation plays a very important role in the power system. During the operation of the transformer, the copper loss in the winding and the iron loss in the core are converted into heat energy, which increases the temperature of each part of the transformer. The service life of the transformer is mainly determined by the degree of insulation aging, which is mainly caused by temperature changes. The research results show that when the temperature exceeds the design temperature, the service life of the transformer will be reduced by half for every 6°C increase in temperature. This is the six-degree rule of transformer insulation aging. It can be seen that temperature is an important indicator affecting the service life of the transformer. Most of the transformer cooling methods use natural oil circulation air cooling and forced oil circulation air cooling.

[0003] At present, the transformer air cooling control system still uses relays or PLCs to collect dry contact signals of transformer oil temperature, winding temperature, and overload, and only starts and exits the operation of the cooler through contact signals. There is no real intelligentization of the transformer cooler control system, and it is impossible to systematically monitor the changes in transformer oil temperature, winding temperature, load, oil level and other parameters, and it is impossible to provide the optimal operation and maintenance plan for the main transformer air cooling based on the data change rules of the above information.

[0004] At present, the coolers of domestic transformers are assembled into traditional electromagnetic and PLC intelligent cooling control systems through complex electrical connections for centralized control. The startup modes are set as fixed modes such as "working", "auxiliary", and "standby". The coolers set in working mode are always running; the coolers in auxiliary mode start and stop according to the dry contact signals of transformer oil temperature, winding temperature, and overload; the coolers in standby mode will only start after the cooler fails in working mode; its control mode is relatively simple, which greatly reduces the utilization rate of the cooler. In addition, in different seasons and at different ambient temperatures, the cooler will only operate according to the inherent mode, especially in winter when the temperature changes suddenly and the fan blades are blocked by snow and ice, causing a complete stop failure. Secondly, no visualization design is performed for the transformer oil temperature, winding temperature, load, oil level and other signals, resulting in poor correlation between these signals, and it is impossible to give effective judgments on operating safety and preventive fault prompts. Utility Model Content

[0005] The main purpose of the utility model is to provide a transformer intelligent cooling visualization measurement and control system, so as to at least solve the problem that the traditional cooling control system fails to perform comprehensive detection and judgment on the transformer, transformer cooler and surrounding environment, and cannot give effective judgment and preventive fault prompts on the transformer operation safety.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a transformer intelligent cooling visualization measurement and control system, including: a transformer body, a transformer cooler, a transformer body monitoring unit, a transformer cooler monitoring unit, an environmental monitoring unit, a controller, a communication unit and a human-computer interaction unit; the transformer body monitoring unit is arranged on the transformer body, and the transformer body monitoring unit is used to at least obtain the oil temperature, winding temperature, operating load and oil level of the transformer body; the transformer cooler monitoring unit is arranged on the transformer cooler, and the transformer cooler monitoring unit is used to at least obtain the operating state of the transformer cooler; the environmental monitoring unit is used to at least obtain the temperature of the external environment; the controller is connected to the transformer cooler, the transformer body monitoring unit, the transformer cooler monitoring unit and the environmental monitoring unit, and the controller is used to adjust the operating mode of the transformer cooler according to the data obtained by the transformer body monitoring unit, the transformer cooler monitoring unit and the environmental monitoring unit; the human-computer interaction unit is connected to the controller through the communication unit, and the communication unit is used to send the data obtained by the transformer body monitoring unit, the transformer cooler monitoring unit and the environmental monitoring unit to the human-computer interaction unit, and the human-computer interaction unit is used to display the operating information of the transformer cooler and the transformer body and to set the operating parameters of the transformer cooler.

[0007] Furthermore, the transformer main body monitoring unit includes at least: a first temperature sensor, a second temperature sensor, a load recorder and an oil level gauge; the first temperature sensor is used to measure the oil temperature of the transformer main body; the second temperature sensor is used to measure the winding temperature of the transformer main body; the load recorder is used to measure the operating load of the transformer main body; the oil level gauge is used to measure the oil level of the transformer main body.

[0008] Furthermore, the environment monitoring unit includes at least a third temperature sensor, which is disposed in the external environment and is used to obtain the temperature of the external environment.

[0009] Furthermore, the human-machine interaction unit includes a touch screen, and the touch screen is used to display operating information of the transformer cooler and the transformer body and to set operating parameters of the transformer cooler.

[0010] Furthermore, the controller also communicates with the cloud platform through the communication unit, and the communication unit is also used to send data obtained by the transformer main body monitoring unit, the transformer cooler monitoring unit and the environmental monitoring unit to the cloud platform. The cloud platform is used to store data and remotely control, measure, signal and adjust the transformer cooler through the controller.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model can view the oil temperature, winding temperature, load, oil level, and cooler operating status curve through the touch screen, realizing the visualization capability of the real-time operating status of the cooling control system.

[0013] 2. By collecting signals such as transformer oil temperature, winding temperature, oil level, load current, and climate environment, real-time monitoring of various data and big data statistics of cooler operating status can be achieved.

[0014] 3. Use data to assist in developing the best operation strategy for the cooler according to different time periods, seasons, and ambient temperatures, and output the optimal control mode for the cooler based on the strategy.

[0015] 4. Based on big data statistics, it is determined whether the change curves of transformer oil temperature and winding temperature are within the normal range; whether the change curves of oil temperature and oil level are within the normal range; whether the change curves of oil temperature and load are within the normal range. Statistical analysis is performed through the controller to provide information data for transformer cooler control and safe operation and maintenance of transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 This is a structural block diagram of a transformer intelligent cooling visualization measurement and control system that can be selected according to an embodiment of the utility model;

[0018] Figure 2 This is a workflow diagram of a transformer intelligent cooling visualization measurement and control system that can be selected according to an embodiment of the utility model;

[0019] Figure 3 It is a characteristic curve diagram of pressure H and flow rate Q which can be selected according to the embodiment of the utility model;

[0020] Figure 4 It is a control block diagram of automatic start and stop of a transformer cooler of a transformer intelligent cooling visualization measurement and control system which can be selected according to an embodiment of the utility model.

[0021] The above drawings include the following reference numerals:

[0022] 10. Transformer body; 20. Transformer cooler; 30. Transformer body monitoring unit; 31. First temperature sensor; 32. Second temperature sensor; 33. Load recorder; 34. Oil level gauge; 40. Transformer cooler monitoring unit; 50. Environmental monitoring unit; 51. Third temperature sensor; 60. Controller; 70. Communication unit; 80. Human-computer interaction unit; 81. Touch screen; 90. Cloud platform. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] like Figures 1 to 4As shown, a transformer intelligent cooling visualization measurement and control system includes: a transformer body 10, a transformer cooler 20, a transformer body monitoring unit 30, a transformer cooler monitoring unit 40, an environment monitoring unit 50, a controller 60, a communication unit 70 and a human-computer interaction unit 80; the transformer body monitoring unit 30 is arranged on the transformer body 10, and the transformer body monitoring unit 30 is used to at least obtain the oil temperature, winding temperature, operating load and oil level of the transformer body 10; the transformer cooler monitoring unit 40 is arranged on the transformer cooler 20, and the transformer cooler monitoring unit 40 is used to at least obtain the operating state of the transformer cooler 20; the environment monitoring unit 50 is used to at least obtain the temperature of the external environment; the controller 60 and the transformer The cooler 20, the transformer main body monitoring unit 30, the transformer cooler monitoring unit 40 and the environment monitoring unit 50 are all connected, and the controller 60 is used to adjust the operation mode of the transformer cooler 20 according to the data obtained by the transformer main body monitoring unit 30, the transformer cooler monitoring unit 40 and the environment monitoring unit 50; the human-machine interaction unit 80 is connected to the controller 60 through the communication unit 70, and the communication unit 70 is used to send the data obtained by the transformer main body monitoring unit 30, the transformer cooler monitoring unit 40 and the environment monitoring unit 50 to the human-machine interaction unit 80, and the human-machine interaction unit 80 is used to display the operation information of the transformer cooler 20 and the transformer main body 10 and to set the operation parameters of the transformer cooler 20. When the utility model is in use, the oil temperature, winding temperature, load, oil level, and operation state operation curve of the transformer main body 10 can be viewed through the human-machine interaction unit 80, so as to realize the visualization capability of the real-time operation state of the cooling control system. By collecting signals such as the oil temperature, winding temperature, oil level, load current and climate environment of the transformer main body 10, real-time monitoring of various data and big data statistics of the operation state of the transformer cooler 20 are realized. These data are used to assist in the formulation of the best operation strategy for the transformer cooler 20 according to different time periods, seasons, and ambient temperatures, and the optimal control mode output of the transformer cooler 20 is realized according to the strategy. The controller 60 gives the change curves of the oil temperature and the winding temperature of the transformer body 10 according to the big data statistics, whether the change curves of the oil temperature and the oil level are within the normal range, whether the change curves of the oil temperature and the load are within the normal range, and performs statistical analysis to provide information data for the control of the transformer cooler 20 and the safe operation and maintenance of the transformer body 10.

[0025] As an optimization solution of the utility model, Figure 1As shown, the transformer main body monitoring unit 30 at least includes: a first temperature sensor 31, a second temperature sensor 32, a load recorder 33 and an oil level gauge 34; the first temperature sensor 31 is used to measure the oil temperature of the transformer main body 10; the second temperature sensor 32 is used to measure the winding temperature of the transformer main body 10; the load recorder 33 is used to measure the operating load of the transformer main body 10; the oil level gauge 34 is used to measure the oil level of the transformer main body 10. Preferably, in addition to monitoring the oil temperature, winding temperature, operating load and oil level of the transformer main body 10, the transformer main body monitoring unit 30 also collects data such as the oil flow relay on the transformer main body 10, the three-side switch trip position relay, and the transformer oil level simulation signal in real time.

[0026] As an optimization solution of the utility model, Figure 1 As shown, the environment monitoring unit 50 at least includes a third temperature sensor 51, and the third temperature sensor 51 is disposed in the external environment, and the third temperature sensor 51 is used to obtain the temperature of the external environment.

[0027] As an optimization solution of the utility model, Figure 1 As shown, the human-machine interaction unit 80 includes a touch screen 81 , and the touch screen 81 is used to display the operating information of the transformer cooler 20 and the transformer body 10 and to set the operating parameters of the transformer cooler 20 .

[0028] As an optimization solution of the utility model, Figure 1 As shown, the controller 60 also communicates with the cloud platform 90 through the communication unit 70, and the communication unit 70 is also used to send the data obtained by the transformer main body monitoring unit 30, the transformer cooler monitoring unit 40 and the environment monitoring unit 50 to the cloud platform 90, and the cloud platform 90 is used to store data and remotely control, measure, communicate and adjust the transformer cooler 20 through the controller 60. Preferably, computer network communication is used for centralized monitoring, DCS control and cloud platform 90 to realize remote control, remote measurement, remote communication and remote adjustment functions, and data can be saved to the cloud platform 90, which can be checked at any time for data analysis.

[0029] As an optimization scheme of the present invention, the controller 60 in the present invention adopts an ARM microprocessor as the main control core. The controller 60 collects the upper oil temperature, winding temperature, operating load, oil flow relay, three-side switch trip position relay, transformer oil level simulation signal, etc. of the transformer main body 10 in real time, and dynamically puts in or out the corresponding number of transformer coolers 20 according to the above parameters collected, and models a set of transformer cooler 20 operation modes suitable for the site through clock timing and the changes of oil temperature, winding temperature and load of the transformer main body 10; (such as: when the oil temperature and winding temperature are lower than the starting value and the temperature is low in winter, the mode is converted to winter mode. At this time, only the oil pump runs to ensure the oil circulation of the cooler, and reasonable start and stop are performed according to the changes in the detected oil level and the changes in the oil temperature and winding temperature curve. In this mode, the fan is out of operation to prevent the fan from being blocked by rain and snow in winter). According to this scheme, a large number of mathematical models are established, and the best operation strategy is formulated according to the on-site operation status and output to the PLC logic control of the controller 60.

[0030] As an optimization solution of the utility model, Figure 2 As shown, the controller 60 switches on and off the transformer cooler 20 in the corresponding mode according to the top oil temperature and the operating load signal, transmits the fault information in operation through the communication port and the fault contact through the communication unit 70, and organizes and stores the information in the human-machine interaction unit 80. The specific cause and time of the fault can be found out with the help of the "fault analysis" option, and the working power supply and the cooler operation mode can also be automatically rotated at a fixed time. The utility model has three control modes: manual control, automatic control, and controller 60 fault emergency interlocking start in automatic mode. When the controller 60 is damaged, it will automatically switch to the manual control mode without affecting the air cooling of the transformer body 10 and the sending of air cooling faults. The controller 60 can flexibly set the transformer cooler 20 to "work", "auxiliary", "standby", and "stop" four operation modes, with the functions of automatic switching of the standby power supply, automatic rotation and alternating use of the power supply, and automatic rotation of the transformer cooler 20 operation mode, so as to achieve the most optimized, most efficient, safest and longest life of the air cooling equipment. The controller 60 automatically switches on and off the "auxiliary" transformer cooler 20 according to the upper oil temperature of the transformer body 10 and the operating load. In the event of a "working" or "auxiliary" fault, the "standby" transformer cooler 20 is automatically switched on, and the "standby" state is automatically returned to the initial state after the fault is repaired.

[0031] As an optimization scheme of the utility model, the utility model formulates the best operation strategy of the fan according to different time periods, seasons and ambient temperatures. At the same time, the utility model also has excellent energy-saving effects. The specific principles are as follows: Figure 3As shown, curve 1 is the characteristic curve of pressure H and flow Q of the fan at constant speed, and curve 2 is the wind resistance characteristic of the pipe network (the valve opening is 100%). Assuming that the fan is designed to work at point A with the highest efficiency, and the output air volume Q1 is 100%, the shaft power P1=Q1*H1 is proportional to the area AH10Q1. According to the process requirements, when the air volume needs to be reduced from Q1 to Q (for example, 70%), if the method of adjusting the valve is adopted, it is equivalent to increasing the pipe network resistance, so that the pipe network resistance characteristic changes to curve 3. The system changes from the original working condition point A to the new working condition point B. It can be seen from the figure that the wind pressure has increased instead, and the shaft power P2 is proportional to the area BH20Q2, and the reduction is not much. The utility model uses the intelligent air cooling speed control method performed by the controller 60 to reduce the fan speed from N1 to N2. According to the proportional law of the fan, the pressure H and flow Q characteristics at the speed N2 can be drawn as shown in curve 4. It can be seen that under the condition of meeting the same air volume Q2, the wind pressure H3 will be greatly reduced, and the power P3 (equal to the area CH30Q2) will also be significantly reduced. The power saved △P=△HQ2 is proportional to the area BH2H3C, and the energy-saving effect is very obvious. It can be seen from fluid mechanics that the air volume Q is proportional to the first power of the speed, the wind pressure H is proportional to the square of the speed, and the shaft power P is proportional to the cube of the speed. When the air volume decreases and the fan speed decreases, the power decreases a lot. For example, when the air volume drops to 80% and the speed also drops to 80%, the shaft power drops to 51% of the rated power; if the air volume drops to 50%, the power P can drop to 13% of the rated power. Of course, due to the influence of actual working conditions, the actual value of energy saving will not be so obvious, but even so, the energy saving effect is very obvious. Therefore, in mechanical equipment with fans and oil pumps, using this method to adjust the air volume and flow is the most effective method for energy saving.

[0032] According to the basic laws of fluid mechanics, fans and pumps are all square torque loads, and their speed n has the following relationship with flow rate Q, pressure H and shaft power P: Q∝n, H∝n2, P∝n3; that is, flow rate is proportional to speed, pressure is proportional to the square of speed, and shaft power is proportional to the cube of speed. Take an oil pump as an example, its outlet pressure head is H0 (the outlet pressure head is the static pressure difference between the pump inlet and the pipeline outlet), the rated speed is n0, the pipe resistance characteristic when the valve is fully open is r0, the corresponding pressure under rated working conditions is H1, and the outlet flow rate is Q1. In field control, the oil pump is usually operated at a constant speed to control the flow rate. When the flow rate decreases from Q1 to Q2 by 50%, the valve opening decreases, causing the pipe network resistance characteristic to change from r0 to r1, and the system working point moves from the original point A to point B along direction I; under its throttling effect, the pressure H1 changes to H2. The actual value of the pump shaft power (kW) can be calculated by the formula: P = Q·H / (ηc·ηb)×10 -3It is concluded that. Among them, P, Q, H, ηc, ηb represent power, flow, pressure, water pump efficiency, transmission efficiency, and direct transmission is 1. Assuming that the total efficiency (ηc·ηb) is 1, when the water pump moves from point A to point B to work, the power consumption saved by the motor is the area difference between AQ1OH1 and BQ2OH2. If the speed control means are used to change the speed n of the water pump, when the flow is reduced by 50% from Q1 to Q2, the pipe network resistance characteristic is the same curve r0, and the system working point will move from the original point A to point C along direction II, and the operation of the water pump will also be more reasonable. When the valve is fully open and there is only pipe network resistance, the system meets the flow requirements on site, and energy consumption is bound to be reduced. At this time, the power consumption saved by the motor is the area difference between AQ1OH1 and CQ2OH3. Comparing the use of valve opening adjustment and water pump speed control, it is obvious that the use of water pump speed control in the utility model is more effective and reasonable, and has a significant energy-saving effect.

[0033] As an optimization scheme of the utility model, the utility model adopts a digital programmable controller 60 that meets the requirements of the visual monitoring system and is designed and manufactured in strict accordance with the application environment conditions of the substation as the control core, and sets various operating parameters through the touch screen 81, and checks the operating information and fault information of the transformer body 10 and the transformer cooler 20, so as to realize human-computer interaction. The utility model collects the upper oil temperature signal of the transformer body 10 and the operating load signal in real time and inputs them into the programmable controller 60. According to the requirements of the power transformer operation regulations, the automatic fan adjustment is exited and started according to the comprehensive judgment of the transformer body 10 oil temperature, winding temperature, load, oil level, etc.

[0034] As an optimization solution of the present invention, the controller 60 is equipped with computer software, which can permanently save the various monitored and statistical power parameters, the state change time of each motor switch, the alarm fault category, the operator code and time, and the power on and off time, so as to analyze the operation of the entire system. The specific analysis includes whether the change curves of the oil temperature and the winding temperature of the transformer body 10 are within the normal range; whether the change curves of the oil temperature and the oil level are within the normal range; whether the change curves of the oil temperature and the load are within the normal range; thereby indirectly judging the operating status of the transformer body 10.

[0035] As an optimization scheme of the utility model, the controller 60 is provided with a switching device and PLC for two working power supplies, and can realize the "working" and "standby" states of the two working power supplies. When the working power supply fails, the standby power supply can be automatically put into use, and the fan will be automatically started and an alarm signal will be issued, thereby ensuring the reliable operation of the transformer body 10. When there is a problem with the external sensor or PLC, it will automatically switch to the second working path. And send a "fault" signal to the remote control center. In addition, when there is a major problem with the control system, manual one-to-one control can be performed. And the design principle within the system is to design a standby system that does not cause the transformer cooler 20 to stop completely due to one device.

[0036] As an optimization scheme of the utility model, by collecting analog signals such as oil temperature, winding temperature, oil level, load, oil level, etc. of the transformer body 10, and by monitoring the operating status of the transformer cooler 20 and the two-stage power supply, the actual operating status of the cooler and the actual mode setting of the cooler can be viewed through the touch screen 81.

[0037] As an optimization solution of the utility model, according to the control logic of the utility model, each device has multiple functions:

[0038] (1) The utility model has two sets of completely independent control modes, including the functions of manually controlling the start and stop of the transformer cooler 20 and automatically controlling the start and stop of the transformer cooler 20. In the automatic state, the start and stop can be performed by collecting analog signals of the oil temperature meter and the winding temperature meter of the transformer body 10, and the best operation strategy of the fan can be formulated according to different time periods, seasons, and ambient temperatures, so as to input this strategy into the air cooling system PLC to achieve the optimal cooling mode of the equipment.

[0039] (2) The present invention has the function of determining whether the transformer body 10 is in operation or shutdown.

[0040] (3) The utility model has the function of reasonably starting and stopping the transformer cooler 20 according to analog signals such as the oil temperature, winding temperature, oil level, and load of the transformer body 10.

[0041] (4) The utility model has the function of controlling the working mode of the transformer cooler 20 to be in four states: "working", "auxiliary", "standby" and "stop": a) working: the transformer cooler 20 is in the running state; b) auxiliary: the transformer cooler 20 is automatically put into operation or withdrawn according to the change of the oil temperature of the transformer body 10 or the load of the transformer body 10; c) standby: the transformer cooler 20 is put into operation when the working cooler or the auxiliary cooler fails; d) stop: the transformer cooler 20 is in the withdrawn state.

[0042] (5) The utility model has the function of monitoring the operating status of the transformer cooler 20.

[0043] (6) The utility model has a transformer cooler 20 full stop tripping function, and the time can be set.

[0044] (7) The utility model has the function of monitoring and automatically switching the two-way transformer cooler 20 AC power supply. The power supply can be regularly rotated through PLC, and the rotation time can be set.

[0045] (8) The utility model has an alarm function, and the alarm information includes abnormal power supply of the transformer cooler 20, abnormal working power supply of the device, fault of the transformer cooler 20, complete stop of the transformer cooler 20, PLC fault, running time of each group of transformer coolers 20, running current and voltage of each group of transformer coolers 20, oil temperature and winding temperature of the transformer body 10, abnormal oil flow, etc. The alarm information should be able to be displayed on the touch screen 81.

[0046] (9) The input quantity interface of the utility model includes: transformer main body 10 operation status feedback switch quantity, transformer main body 10 overload switch quantity, transformer main body 10 oil temperature switch quantity, transformer cooler 20 operation status monitoring switch quantity.

[0047] (10) The output interface of the utility model includes: transformer cooler 20 full stop tripping, transformer cooler 20 start and stop control, and device alarm signal.

[0048] (11) The touch screen 81 of the present invention is a 7-inch display screen with Chinese display. The touch screen 81 is used to display the working status of the transformer cooler 20, warning information, and device operating parameters (operating time of each group of transformer coolers 20, power supply operating status, transformer cooler 20 operating simulation screen, real-time alarm information).

[0049] (12) The anti-interference performance of the utility model meets the requirements of relevant national standards and technologies.

[0050] As an optimization scheme of the utility model, the start-stop mode design scheme of the transformer cooler 20 is as follows:

[0051] (1) When the utility model is in manual mode, each transformer cooler 20 can be manually controlled to start and stop, and the start and stop of the transformer coolers 20 should correspond one to one.

[0052] (2) Figure 4 As shown, the transformer cooler 20 can be automatically started and stopped.

[0053] (3) The utility model has the function of starting and stopping the transformer cooler 20 according to the change of the oil temperature of the transformer body 10: a) the controller 60 receives the switch signal of the oil temperature of the transformer body 10, and controls the start and stop of the transformer cooler 20 after logical judgment when the transformer body 10 is put into operation; b) the transformer cooler 20 is started when the oil temperature of the transformer body 10 is high, and the transformer cooler 20 is stopped when the oil temperature of the transformer body 10 is low. When the oil temperature of the transformer body 10 is collected using the switch value method, the controller 60 can receive two switch value inputs of the transformer body 10 oil temperature, namely the low temperature value and the high temperature value of the transformer body 10 oil temperature.

[0054] (4) The utility model has the function of starting and stopping the transformer cooler 20 according to the load change of the transformer body 10. The overload switch value of the transformer body 10 is provided by the transformer body 10 protection or the current relay in the transformer body control box. The auxiliary cooler is set to times the rated current of the transformer main body 10. When the transformer main body 10 is put into operation, the controller 60 starts the auxiliary cooler when receiving the overload switch action, and stops the auxiliary cooler when the overload switch is reset.

[0055] (5) The utility model has the function of starting each group of transformer coolers one by one with a delay of 30 seconds when the device PLC fails or the device working power is lost. The delayed starting device is an integrated module.

[0056] (6) The utility model has the function of delaying the start of each transformer cooler 20, and the delay interval is more than 30s. The delay time can be set on the touch screen 81, and the time range is

[0057] (7) The automatic start and stop of the transformer cooler 20 should correspond one to one, and the automatic start and stop logic function of the transformer cooler 20 should meet the requirements.

[0058] The utility model can view the operating curves of the oil temperature, winding temperature, load, oil level, and operating status of the transformer main body 10, the transformer cooler 20, through the touch screen 81, to realize the visualization capability of the real-time operating status of the cooling control system. By collecting signals such as the oil temperature, winding temperature, oil level, load current, and climate environment of the transformer main body 10, real-time monitoring of various data and big data statistics of the operating status of the transformer cooler 20 are realized. The data is used to assist in the formulation of the best operation strategy for the transformer cooler 20 according to different time periods, seasons, and ambient temperatures, and the optimal control mode output of the transformer cooler 20 is realized according to the strategy. According to the big data statistics, it is given whether the change curves of the oil temperature and winding temperature of the transformer main body 10 are within the normal range; it is given whether the change curves of the oil temperature and oil level are within the normal range; it is given whether the change curves of the oil temperature and load are within the normal range, and statistical analysis is performed through the controller 60 to provide information data for the control of the transformer cooler 20 and the safe operation and maintenance of the transformer main body 10.

[0059] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transformer intelligent cooling visualization measurement and control system, characterized in that: include: A transformer body (10) and a transformer cooler (20); A transformer main body monitoring unit (30), the transformer main body monitoring unit (30) being arranged on the transformer main body (10), the transformer main body monitoring unit (30) being used to obtain at least the oil temperature, winding temperature, operating load and oil level of the transformer main body (10); A transformer cooler monitoring unit (40), the transformer cooler monitoring unit (40) being arranged on the transformer cooler (20), the transformer cooler monitoring unit (40) being used to at least obtain an operating state of the transformer cooler (20); An environment monitoring unit (50), the environment monitoring unit (50) being used to obtain at least the temperature of the external environment; a controller (60), the controller (60) being connected to the transformer cooler (20), the transformer main body monitoring unit (30), the transformer cooler monitoring unit (40) and the environment monitoring unit (50), the controller (60) being used to adjust the operation mode of the transformer cooler (20) according to data acquired by the transformer main body monitoring unit (30), the transformer cooler monitoring unit (40) and the environment monitoring unit (50); A communication unit (70) and a human-machine interaction unit (80), wherein the human-machine interaction unit (80) is connected to the controller (60) via the communication unit (70), the communication unit (70) is used to send data acquired by the transformer main body monitoring unit (30), the transformer cooler monitoring unit (40) and the environment monitoring unit (50) to the human-machine interaction unit (80), and the human-machine interaction unit (80) is used to display operating information of the transformer cooler (20) and the transformer main body (10) and to set operating parameters of the transformer cooler (20).

2. The transformer intelligent cooling visualization measurement and control system according to claim 1 is characterized in that: The transformer main body monitoring unit (30) comprises at least: A first temperature sensor (31), the first temperature sensor (31) being used to measure the oil temperature of the transformer body (10); A second temperature sensor (32), the second temperature sensor (32) being used to measure the winding temperature of the transformer body (10); A load recorder (33), the load recorder (33) being used to measure the operating load of the transformer body (10); An oil level gauge (34), the oil level gauge (34) being used to measure the oil level of the transformer body (10).

3. The transformer intelligent cooling visualization measurement and control system according to claim 1 is characterized in that: The environmental monitoring unit (50) comprises at least: A third temperature sensor (51), wherein the third temperature sensor (51) is arranged in an external environment, and the third temperature sensor (51) is used to obtain the temperature of the external environment.

4. The transformer intelligent cooling visualization measurement and control system according to claim 1 is characterized in that: The human-computer interaction unit (80) comprises: A touch screen (81), the touch screen (81) being used to display operating information of the transformer cooler (20) and the transformer body (10) and to set operating parameters of the transformer cooler (20).

5. The transformer intelligent cooling visual measurement and control system according to claim 1 is characterized in that: The controller (60) also communicates with a cloud platform (90) via the communication unit (70); the communication unit (70) is also used to send data acquired by the transformer main body monitoring unit (30), the transformer cooler monitoring unit (40) and the environment monitoring unit (50) to the cloud platform (90); the cloud platform (90) is used to store data and remotely control, measure, communicate and adjust the transformer cooler (20) via the controller (60).

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