CN216246893U - An intelligent transformer temperature monitoring system - Google Patents

Abstract

An intelligent transformer temperature monitoring system comprises a temperature measuring device; this temperature measuring device includes: the device comprises a temperature sensor, a signal conditioning and isolating module, a data processing module, a wireless transmitter, a wireless receiver, an energy management circuit and a thermoelectric generator. The thermoelectric generation module based on the thermoelectric generation principle can supply power to the whole temperature measuring device, and meanwhile, the temperature sensor works, and the acquired temperature data are processed and then uploaded to the application layer through the wireless transmitter and the wireless receiver, so that the temperature of the transformer can be monitored on line in real time. The monitoring system is small in size and low in maintenance cost, and has important significance for maintaining safe operation of power equipment such as a transformer.

Description

An intelligent transformer temperature monitoring system

technical field

The utility model belongs to the technical field of on-line monitoring of transformers in power transmission and transformation equipment, in particular to an intelligent transformer temperature monitoring system.

Background technique

With the rapid development of the scale of the national power industry, the demand for electricity continues to rise, and power transformers continue to develop in the direction of large capacity and high voltage. As an important power equipment in the power system, the safety and reliability of the operation of the transformer will have a direct impact on the power supply quality of the power grid, of which overheating faults account for about 63% of the total number of faults. Safe and stable operation is of great significance.

At present, the temperature monitoring device of the transformer can be divided into two types: active temperature measurement and passive temperature measurement. Among them, the active temperature measurement method includes infrared camera temperature measurement method, which uses the principle of infrared imaging for real-time temperature detection, but the cost is very high; passive temperature measurement sensors mainly include optical fiber temperature measurement sensors, inductive electricity temperature measurement sensors, etc. However, the optical fiber temperature measurement sensor uses optical fiber as the transmission signal line, and the temperature measurement accuracy and data transmission quality are high, but the optical fiber core is easily broken during installation and the cost is high; the inductive electricity temperature measurement sensor must be used after the induced current is greater than a certain value. To work properly, there is a problem of limited application scope.

Utility model content

Based on the above problems, the purpose of this utility model is to provide an intelligent transformer temperature monitoring system, which adopts passive wireless technology and thermoelectric power generation technology to realize on-line monitoring of transformer temperature, timely detect abnormal temperature conditions of transformers, and prevent the occurrence of transformer accidents.

In order to achieve the above purpose, the utility model provides an intelligent transformer temperature monitoring system, including a temperature measurement device; the temperature measurement device includes a temperature sensor, a signal conditioning and isolation module, a data processing module, a wireless transmitter, a wireless receiver, Energy management circuits and thermoelectric generators;

The thermoelectric generator supplies power to the temperature sensor, the signal conditioning and isolation module, the data processing module, the wireless transmitter and the wireless receiver through the energy management circuit;

The temperature sensor is connected to the data processing module through a signal conditioning and isolation module, and converts temperature data into digital signals and transmits it to the data processing module;

The data processing module is connected in communication with the wireless transmitter, and sends the processed temperature data to the wireless transmitter, and then sends the processed temperature data to the wireless receiver through the wireless transmitter;

The temperature measuring device is fixedly arranged on each phase winding, iron core and/or each phase cable head of the intelligent transformer;

It also includes a cooling fan and a fan control module; when the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature fan start setting value of the body, the fan control module controls the cooling fan to start.

Further, the thermoelectric generator includes a hot end, a cold end and a radiator, the hot end is installed at the temperature monitoring part of the transformer, and the radiator is arranged on one side of the cold end.

Further, the energy management circuit includes a booster circuit, a start-up circuit, a voltage regulator circuit and an energy storage device.

Further, it also includes a display module;

The wireless receiver transmits the received temperature data to the display module for display.

Further, it also includes a high temperature alarm module, when the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature alarm set value of the main body, it sends out a high temperature alarm signal of the main body.

Further, it also includes a protection control module;

When the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature protection set value of the transformer body, the protection control module controls the transformer to trip and exit the transformer operation.

Further, a delay unit is also included, and after a certain time delay, a corresponding operation is performed.

To sum up, the utility model provides an intelligent transformer temperature monitoring system, the temperature measuring device includes: a temperature sensor, a signal conditioning and isolation module, a data processing module, a wireless transmitter, a wireless receiver, an energy management circuit and a thermoelectric generator. The intelligent transformer temperature monitoring system includes the temperature measuring device. The thermoelectric generating module of the utility model based on the principle of thermoelectric power generation can supply power for the whole set of temperature measuring devices, while the temperature sensor works, and the collected temperature data is processed and uploaded to the application layer through the wireless transmitter and the wireless receiver, thereby realizing the transformer Online real-time monitoring of temperature. The temperature measuring device is small in size and low in maintenance cost, and is of great significance for maintaining the safe operation of power equipment such as transformers.

Description of drawings

Fig. 1 is the structural block diagram of the temperature measuring device of the embodiment of the present invention;

2 is a structural block diagram of an intelligent transformer temperature monitoring system according to an embodiment of the present invention;

FIG. 3 is a structural block diagram of an intelligent transformer temperature monitoring system according to another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the present utility model will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

A first aspect of the present utility model provides a temperature measurement device, as shown in FIG. 1 , including a temperature sensor, a signal conditioning and isolation module, a data processing module, a wireless transmitter, a wireless receiver, an energy management circuit and a thermoelectric generator The thermoelectric generator supplies power to the temperature sensor, the signal conditioning and isolation module, the data processing module, the wireless transmitter and the wireless receiver through the energy management circuit; the temperature sensor is connected to the data processing module through the signal conditioning and isolation module , convert the temperature data into digital signals and transmit them to the data processing module; the data processing module is connected in communication with the wireless transmitter, and sends the processed temperature data to the wireless transmitter, and then sends it through the wireless transmitter to the wireless receiver.

Further, the thermoelectric generator includes a hot end, a cold end and a radiator, the hot end is installed at the temperature monitoring part of the transformer, and the radiator is arranged on one side of the cold end, and conducts heat conduction directly with the cold end. When the temperature difference between the hot end and the cold end reaches a certain level, the thermoelectric generator converts the heat into electric energy, and supplies power to the device itself after processing by the subsequent circuit.

Further, the energy management circuit includes a booster circuit, a start-up circuit, a voltage regulator circuit and an energy storage device. The boost circuit is responsible for boosting the lower voltage output by the thermoelectric generator and storing it in the capacitor or rechargeable battery; the start-up circuit controls the output of energy, and when the voltage of the energy storage device rises to the high voltage threshold, the start-up circuit controls to turn on the subsequent stage When the voltage of the energy storage device drops to the low voltage threshold, the start-up circuit controls the shutdown of the latter-stage circuit, and the energy storage device continues to store energy and work over and over again.

The data processing module periodically collects temperature measurement data by controlling the temperature sensor, and converts the analog signal into a digital signal through the signal conditioning and isolation module, and provides it to the data processing module for processing. The data processing module sends the processed data through the wireless transmitter. , received by another module wireless receiver in the temperature monitoring system, and uploaded to PC, APP or display screen for display.

A second aspect of the present invention provides an intelligent transformer temperature monitoring system, as shown in FIG. 2 and FIG. 3 , including the temperature measuring device as described above.

Further, the intelligent transformer temperature monitoring system further includes a display module; the wireless receiver transmits the received temperature data to the display module for display.

Further, the temperature measuring device is fixedly arranged on each phase winding, iron core and/or each phase cable head of the smart transformer.

Further, it also includes a high temperature alarm module. When the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature alarm set value of the main body, the delay unit will delay for a certain delay time (such as 60s). When confirmed, the device starts the fan of the transformer body, and at the same time sends out a high temperature alarm signal on the body.

Further, it also includes a cooling fan and a fan control module; when the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the starting value of the high temperature fan of the main body, the delay unit passes a certain delay time ( If 60s) delay confirmation, the fan control module controls the cooling fan to start, and sends a remote signal to start the fan on the body.

Further, it also includes a protection control module; when the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature protection set value of the body, the delay unit delays for a certain delay time (such as 60s). When confirmed, the protection control module controls the trip of the transformer and exits the operation of the transformer.

In summary, the utility model provides a temperature measurement device and an intelligent transformer temperature monitoring system, the temperature measurement device includes: a temperature sensor, a signal conditioning and isolation module, a data processing module, a wireless transmitter, a wireless receiver, an energy Manage circuits and thermoelectric generators. The intelligent transformer temperature monitoring system includes the temperature measuring device. The thermoelectric generating module of the utility model based on the principle of thermoelectric power generation can supply power for the whole set of temperature measuring devices, while the temperature sensor works, and the collected temperature data is processed and uploaded to the application layer through the wireless transmitter and the wireless receiver, thereby realizing the transformer Online real-time monitoring of temperature. The temperature measuring device is small in size and low in maintenance cost, and is of great significance for maintaining the safe operation of power equipment such as transformers.

It should be understood that, the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, but not to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of this invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.

Claims (7)

1. an intelligent transformer temperature monitoring system, is characterized in that, comprises temperature measuring device; Described temperature measuring device comprises temperature sensor, signal conditioning and isolation module, data processing module, wireless transmitter, wireless receiver, energy management circuit and thermoelectric generator; The thermoelectric generator supplies power to the temperature sensor, the signal conditioning and isolation module, the data processing module, the wireless transmitter and the wireless receiver through the energy management circuit; The temperature sensor is connected to the data processing module through a signal conditioning and isolation module, and converts temperature data into digital signals and transmits it to the data processing module; The data processing module is connected in communication with the wireless transmitter, and sends the processed temperature data to the wireless transmitter, and then sends the processed temperature data to the wireless receiver through the wireless transmitter; The temperature measuring device is fixedly arranged on each phase winding, iron core and/or each phase cable head of the intelligent transformer; It also includes a cooling fan and a fan control module; when the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature fan start setting value of the body, the fan control module controls the cooling fan to start. 2. The intelligent transformer temperature monitoring system according to claim 1, wherein the thermoelectric generator comprises a hot end, a cold end and a radiator, the hot end is installed at the temperature monitoring position of the transformer, and the radiator is provided with Cold end side. 3. The intelligent transformer temperature monitoring system according to claim 1 or 2, wherein the energy management circuit comprises a booster circuit, a start-up circuit, a voltage regulator circuit and an energy storage device. 4. The intelligent transformer temperature monitoring system according to claim 1, further comprising a display module; The wireless receiver transmits the received temperature data to the display module for display. 5. The intelligent transformer temperature monitoring system according to claim 1, further comprising a high temperature alarm module, when the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature of the body When the value is set, it will send out the high temperature alarm signal of the main body. 6. The intelligent transformer temperature monitoring system according to claim 1, further comprising a protection control module; When the temperature of any phase winding, iron core and/or any phase cable head of the transformer body exceeds the high temperature protection set value of the transformer body, the protection control module controls the transformer to trip and exit the transformer operation. 7. The intelligent transformer temperature monitoring system according to any one of claims 5-6, further comprising a delay unit, which executes corresponding operations after delaying for a certain period of time.

Images