Transformer on-line oil level monitoring device without power failure

Abstract

The invention relates to a transformer on-line oil level monitoring device without power outage, which comprises at least one oil level detection device, at least one intelligent gateway and an intelligent management platform, and is characterized in that each intelligent gateway is respectively connected with a plurality of oil level detection devices and establishes data communication connection; the intelligent management platform is connected with a plurality of intelligent gateways and establishes data communication connection; the oil level detection device is fixedly installed at the bottom of an indoor and outdoor transformer oil conservator. The device has the advantages of being reasonable in structure, timely and accurate in measurement, capable of achieving early warning, improving inspection efficiency and guaranteeing safe and reliable operation of a power grid.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer maintenance and detection, and in particular relates to a transformer non-stop oil level online monitoring device. Background Art

[0002] The oil level gauge is an important monitoring device for oil-immersed transformers. It is necessary to monitor the changes in the transformer oil level at all times. The transformer insulating oil plays a role in cooling and insulation. When the transformer oil level is too low, it will cause local overheating of the transformer, which will burn the transformer over a long period of time. As the transformer oil temperature changes, the oil level also changes to a certain extent accordingly; the oil pillow is a key component of the oil-immersed transformer and an essential protective device. The oil pillow is an important sign for operation and maintenance personnel to inspect the transformer oil level. However, there are currently the following problems with transformer oil level detection: 1) Manual inspection: Currently, oil level observation is mainly carried out through manual inspection. The number of inspections of transformers in various cities is more than tens of thousands times a year, and operation and maintenance personnel cannot monitor in real time as the oil level changes in real time; 2) Large measurement error: Due to the technical limitations of existing oil level gauges and subjective factors such as perspective, position, and experience, the results of oil level inspections by operation and maintenance personnel have large errors and are difficult to accurately reflect the status of the equipment; Therefore, it is very necessary to provide a transformer non-stop oil level online monitoring device with a reasonable structure, timely and accurate measurement, early warning, improved inspection efficiency, and safe and reliable operation of the power grid. Summary of the invention

[0003] 1. Technical issues In view of the above-mentioned existing technical status, this application mainly addresses the following technical problems: 1. Since transformers are inspected tens of thousands of times a year, manual inspections are inefficient and cannot be monitored in real time; 2. Due to the technical limitations of existing oil level gauges and other factors, there are large errors in the results of oil level inspections, making it difficult to accurately reflect the status of the equipment.

[0004] (II) Technical solution The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a transformer oil level online monitoring device with a reasonable structure, timely and accurate measurement, early warning, improved inspection efficiency, and guaranteed safe and reliable operation of the power grid.

[0005] The objective of the present invention is achieved as follows: a transformer non-stop oil level online monitoring device, which includes at least one oil level detection device, at least one intelligent gateway and an intelligent management platform, each of the intelligent gateways is respectively connected to multiple oil level detection devices and establishes a data communication connection; the intelligent management platform is connected to multiple intelligent gateways and establishes a data communication connection; the oil level detection device is fixedly installed at the bottom of the oil pillow of the indoor and outdoor transformer.

[0006] Furthermore, the oil level detection device uses one of the narrowband Internet of Things NB-loT wireless communication standards and the wireless ad hoc network communication standards to establish a communication connection with the intelligent gateway and send a signal to the intelligent gateway.

[0007] Furthermore, the intelligent gateway establishes a communication connection with the intelligent management platform using a wireless ad hoc network communication system, and sends a signal to the intelligent management platform.

[0008] Furthermore, the oil level detection device includes an ultrasonic oil level sensor, a temperature sensor, a control unit, a radio frequency antenna, a data acquisition and transmission terminal, and a power supply battery; the ultrasonic oil level sensor and the temperature sensor are respectively connected to the control unit via the RS485 protocol; the radio frequency antenna and the data acquisition and transmission terminal cooperate to realize the data remote transmission function.

[0009] Furthermore, the ultrasonic oil level sensor is used to transmit the oil level data of the transformer oil conservator to the control unit through the RS485 protocol; the temperature sensor is used to transmit the surface temperature data of the transformer oil conservator to the control unit through the RS485 protocol.

[0010] Furthermore, the data acquisition and transmission terminal is used to parse the RS485 signal collected by the control unit according to the prescribed protocol, and send the signal to the intelligent gateway through the narrowband Internet of Things NB-loT wireless communication standard or the wireless ad hoc network communication standard; the power supply battery provides a power source for the oil level detection device.

[0011] Furthermore, the oil level detection device also includes a standard oil temperature and oil level curve database, an alarm strategy unit and an online verification unit; the oil level detection device collects data information by comparing the standard oil temperature and oil level curve information with the standard oil temperature and oil level curve database, and transmits the comparison result to the alarm strategy unit to formulate an alarm strategy; the online verification unit is used to regularly perform online verification of the mechanical oil level.

[0012] Furthermore, the oil level detection device is magnetically fixed to the bottom of the indoor and outdoor transformer oil pillow through a strong magnetic adsorption component.

[0013] Furthermore, the oil level detection device is fixed to the bottom of the indoor and outdoor transformer oil pillow through the installation method of insulating rod + conversion head.

[0014] (III) Beneficial effects 1. The device of the present invention uses a sensor to transmit ultrasonic waves to the oil interface to generate reflections, and the propagation path is calculated by the echo time to obtain the oil level; 2. The oil level detection device of the present invention adopts a "strong magnetic attraction" design, which is suitable for application scenarios of various types of transformers; or adopts an "insulating rod + conversion head" installation method, which can be quickly arranged by one person without the need for high-altitude operations; 3. The present invention will effectively solve the problem of large measurement errors caused by technical limitations of the oil level gauge, visual angle, position, experience and other subjective factors when observing the oil level through manual inspection; 4. The present invention can timely and accurately measure the oil level height, realize early warning of oil level change trend, save human resources, improve inspection efficiency, and ensure the safe and reliable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural block diagram of the composition of the present invention.

[0016] Figure 2 The oil level detection device of the present invention is a structural block diagram Figure 1 .

[0017] Figure 3 The oil level detection device of the present invention is a structural block diagram Figure 2 .

[0018] Figure 4 It is a schematic diagram of the installation method of the oil level detection device of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with embodiments and / or drawings. Example

[0020] like Figure 1-4 As shown, a transformer non-stop oil level online monitoring device includes at least one oil level detection device, at least one intelligent gateway and an intelligent management platform, each of the intelligent gateways is respectively connected to multiple oil level detection devices and establishes data communication connections; the intelligent management platform is connected to multiple intelligent gateways and establishes data communication connections; the oil level detection device is fixedly installed at the bottom of the oil pillow of the indoor and outdoor transformer.

[0021] The oil level detection device uses one of the narrowband Internet of Things NB-loT wireless communication standard and the wireless ad hoc network communication standard to establish a communication connection with the intelligent gateway and send a signal to the intelligent gateway.

[0022] The intelligent gateway establishes a communication connection with the intelligent management platform using a wireless ad hoc network communication system and sends a signal to the intelligent management platform.

[0023] In the present invention, the intelligent gateway: the intelligent gateway can be connected to multiple node devices, parse the collected RS485 signals according to a fixed protocol, and send the signals to the intelligent management platform through the wireless ad hoc network communication system.

[0024] The oil level detection device includes an ultrasonic oil level sensor, a temperature sensor, a control unit, a radio frequency antenna, a data acquisition and transmission terminal, and a power supply battery; the ultrasonic oil level sensor and the temperature sensor are respectively connected to the control unit via the RS485 protocol; the radio frequency antenna and the data acquisition and transmission terminal cooperate to realize the data remote transmission function.

[0025] In the present invention, the device uses a sensor to emit ultrasonic waves to reach the oil interface to generate reflection, and uses the echo time to calculate the propagation path to obtain the oil level; radio frequency antenna: the signal is wirelessly transmitted to the intelligent gateway or intelligent management platform; power supply battery: ultra-low power consumption design and extremely low self-consumption battery.

[0026] The ultrasonic oil level sensor is used to transmit the oil level data of the transformer oil conservator to the control unit through the RS485 protocol; the temperature sensor is used to transmit the surface temperature data of the transformer oil conservator to the control unit through the RS485 protocol.

[0027] The data acquisition and transmission terminal is used to parse the RS485 signal collected by the control unit according to the prescribed protocol, and send the signal to the intelligent gateway through the narrowband Internet of Things NB-loT wireless communication standard or the wireless ad hoc network communication standard; the power supply battery provides a power source for the oil level detection device.

[0028] The oil level detection device also includes a standard oil temperature and oil level curve database, an alarm strategy unit and an online verification unit; the oil level detection device collects data information by comparing the standard oil temperature and oil level curve information with the standard oil temperature and oil level curve database, and transmits the comparison result to the alarm strategy unit to formulate an alarm strategy; the online verification unit is used to regularly perform online verification of the mechanical oil level.

[0029] The present invention discloses an online monitoring device for transformer oil level without power outage. When in use, the device adopts a sensor to transmit ultrasonic waves to the oil interface to generate reflection, and calculates the propagation path by echo time to obtain the oil level. The device can timely and accurately measure the oil level, realize early warning of oil level change trend, save human resources, improve inspection efficiency, and ensure safe and reliable operation of power grid. The present invention has good economic and social benefits. Economic benefits: it can accurately monitor the state of transformer oil level online, and conduct transformer oil level inspection several times up to tens of thousands times a year. The use of online monitoring device for transformer oil level without power outage can save manpower and financial resources, and there is no problem of large error, which improves the safe and stable operation of equipment and indirectly generates economic benefits. Social benefits: it ensures that the transformer oil level is in the optimal operating state, ensures the normal operation of power production and life, and promotes the stable development of economy and society. The present invention has the advantages of reasonable structure, timely and accurate measurement, early warning, improved inspection efficiency, and safe and reliable operation of power grid. Example

[0030] like Figure 1-4 As shown, a transformer non-stop oil level online monitoring device includes at least one oil level detection device, at least one intelligent gateway and an intelligent management platform, each of the intelligent gateways is respectively connected to multiple oil level detection devices and establishes data communication connections; the intelligent management platform is connected to multiple intelligent gateways and establishes data communication connections; the oil level detection device is fixedly installed at the bottom of the oil pillow of the indoor and outdoor transformer.

[0031] The oil level detection device is magnetically fixed to the bottom of the indoor and outdoor transformer oil pillow through a strong magnetic adsorption component.

[0032] In the present invention, the oil level detection device adopts a "strong magnetic attraction" design, which is suitable for application scenarios of various types of transformers.

[0033] The oil level detection device is fixed at the bottom of the indoor and outdoor transformer oil pillow through the installation mode of insulating rod + conversion head.

[0034] In the present invention, an installation method of "insulating rod + conversion head" is adopted, and the arrangement can be completed quickly by one person without the need for high-altitude work.

[0035] The present invention discloses an online monitoring device for transformer oil level without power outage. When in use, the device adopts a sensor to transmit ultrasonic waves to the oil interface to generate reflection, and calculates the propagation path by echo time to obtain the oil level. The device can timely and accurately measure the oil level, realize early warning of oil level change trend, save human resources, improve inspection efficiency, and ensure safe and reliable operation of power grid. The present invention has good economic and social benefits. Economic benefits: it can accurately monitor the state of transformer oil level online, and conduct transformer oil level inspection several times up to tens of thousands times a year. The use of online monitoring device for transformer oil level without power outage can save manpower and financial resources, and there is no problem of large error, which improves the safe and stable operation of equipment and indirectly generates economic benefits. Social benefits: it ensures that the transformer oil level is in the optimal operating state, ensures the normal operation of power production and life, and promotes the stable development of economy and society. The present invention has the advantages of reasonable structure, timely and accurate measurement, early warning, improved inspection efficiency, and safe and reliable operation of power grid.

Claims

1. A transformer oil level online monitoring device without power outage, comprising at least one oil level detection device, at least one intelligent gateway and an intelligent management platform, characterized in that: Each of the intelligent gateways is respectively connected to multiple oil level detection devices and establishes a data communication connection; the intelligent management platform is connected to multiple intelligent gateways and establishes a data communication connection; the oil level detection device is fixedly installed at the bottom of the oil pillow of the indoor and outdoor transformers.

2. The transformer oil level online monitoring device without power outage according to claim 1, characterized in that: The oil level detection device uses one of the narrowband Internet of Things NB-loT wireless communication standard and the wireless ad hoc network communication standard to establish a communication connection with the intelligent gateway and send a signal to the intelligent gateway.

3. The transformer oil level online monitoring device without power outage as claimed in claim 2, characterized in that: The intelligent gateway establishes a communication connection with the intelligent management platform using a wireless ad hoc network communication system and sends a signal to the intelligent management platform.

4. The transformer oil level online monitoring device without power outage as claimed in claim 2, characterized in that: The oil level detection device includes an ultrasonic oil level sensor, a temperature sensor, a control unit, a radio frequency antenna, a data acquisition and transmission terminal, and a power supply battery; the ultrasonic oil level sensor and the temperature sensor are respectively connected to the control unit via the RS485 protocol; the radio frequency antenna and the data acquisition and transmission terminal cooperate to realize the data remote transmission function.

5. The transformer oil level online monitoring device without power outage as claimed in claim 4, characterized in that: The ultrasonic oil level sensor is used to transmit the oil level data of the transformer oil conservator to the control unit through the RS485 protocol; the temperature sensor is used to transmit the surface temperature data of the transformer oil conservator to the control unit through the RS485 protocol.

6. The transformer oil level online monitoring device without power outage as claimed in claim 5, characterized in that: The data acquisition and transmission terminal is used to parse the RS485 signal collected by the control unit according to the prescribed protocol, and send the signal to the intelligent gateway through the narrowband Internet of Things NB-loT wireless communication standard or the wireless ad hoc network communication standard; the power supply battery provides a power source for the oil level detection device.

7. The transformer oil level online monitoring device without power outage according to claim 6, characterized in that: The oil level detection device also includes a standard oil temperature and oil level curve database, an alarm strategy unit and an online verification unit; the oil level detection device collects data information by comparing the standard oil temperature and oil level curve information with the standard oil temperature and oil level curve database, and transmits the comparison result to the alarm strategy unit to formulate an alarm strategy; the online verification unit is used to regularly perform online verification of the mechanical oil level.

8. The transformer oil level online monitoring device without power outage as claimed in claim 7, characterized in that: The oil level detection device is magnetically fixed to the bottom of the indoor and outdoor transformer oil pillow through a strong magnetic adsorption component.

9. The transformer oil level online monitoring device without power outage according to claim 7 or 8, characterized in that: The oil level detection device is fixed at the bottom of the indoor and outdoor transformer oil pillow through the installation mode of insulating rod + conversion head.

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