CN211425650U

CN211425650U - Transformer vibration electric power operation maintenance monitoring devices

Info

Publication number: CN211425650U
Application number: CN201920698823.4U
Authority: CN
Inventors: 贺伟; 邹宇
Original assignee: Chengdu Electric Wizard Power Technology Co ltd
Current assignee: Chengdu Electric Wizard Power Technology Co ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-09-04
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses a transformer vibration electric power operation maintenance monitoring devices, including a plurality of vibrations sensors, the vibrations sensors set up on the different positions of transformer, the output of vibrations sensor is connected with data module through communication link, data module's output is connected to the control switch that the transformer corresponds more through the cable junction, data module's output has communication module through the cable junction, communication module signal connection has local control center, communication module signal connection has fortune dimension platform; and a damping device is arranged at the bottom of the transformer.

Description

Transformer vibration electric power operation maintenance monitoring devices

Technical Field

The utility model relates to a power supply field especially relates to a transformer vibration electric power operation maintenance monitoring devices.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction. The transformer belongs to an electric appliance with high energy density. The coil has high alternating current, the alternating current can generate an interactively changing magnetic field, and when the interactively changing magnetic field passes through the iron core of the transformer, the iron core vibrates due to magnetostriction of silicon steel sheets, so that vibration is generated. The vibration of the transformer is a continuous vibration generated by the vibration of the transformer body and the vibration of the cooling device. The magnitude of the transformer vibration is related to the capacity of the transformer, the material of the silicon steel sheet, the magnetic flux density of the iron core and other factors.

The transformer is provided with a cooling device, and the vibration of the cooling device is caused by the vibration generated when a cooling fan and a transformer oil pump run; the vibration of the transformer body is transmitted to the cooling device through the insulating oil, the pipe joint, the assembly parts of the pipe joint and the like, so that the vibration of the cooling device is intensified, and the radiation vibration is increased.

The vibration of the transformer radiated to the periphery through the air is composed of two parts, one part is the body vibration generated by the vibration of the iron core winding which is transmitted to the oil tank through the structural part and the insulating oil; the other part is the vibration of the cooling device caused by the vibration of the cooling fan and the transformer oil pump. The vibration of the transformer body is completely determined by the magnetostrictive vibration of the iron core.

At present, most transformers on the market do not monitor the vibration generated when the power transformer operates, and the conventional method is that field electric operation and maintenance personnel monitor through an external special instrument or listen on the field by the operation and maintenance personnel and judge the operation state of the transformer according to experience. Different operation and maintenance personnel can judge differently, and the accuracy is poor; meanwhile, real-time monitoring of the transformer in operation cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a utility model aim at: to the problems existing in the prior art, the transformer vibration power operation maintenance monitoring device is provided, the problem of real-time monitoring of transformer vibration is solved, the problem of high monitoring cost of transformer vibration is solved, and the problem of instability of a power supply system caused by transformer vibration is solved.

The utility model adopts the technical scheme as follows:

a transformer vibration electric power operation maintenance monitoring device comprises a plurality of vibration sensors, wherein the vibration sensors are arranged at different positions of a transformer, the output ends of the vibration sensors are connected with a data module through communication links, the output ends of the data module are connected to control switches corresponding to the transformer through cables, the output ends of the data module are connected with a communication module through cables, the communication module is in signal connection with a local control center, and the communication module is in signal connection with an operation and maintenance platform; and a damping device is arranged at the bottom of the transformer.

The damping device is a spring and is a shock absorber.

Further, the utility model discloses a preferable structure of a transformer vibration electric power operation maintenance monitoring device, wherein a plurality of vibration sensors are arranged on the outer surface of the transformer, and a plurality of vibration sensors are arranged on a fixed frame of the transformer; the vibration sensors are arranged in a cooling device of the transformer; the vibration sensors are arranged on the spatial positions which are 20-50 cm away from the transformer.

Further, the data module comprises a central processing unit and a memory; the central processing unit is connected with the memory through a bus.

Furthermore, a self-diagnosis module and a pre-judgment module are arranged in a memory preset in the memory, a protection set value is preset in the self-diagnosis module, and a central processing unit in the data module compares the received data with the protection set value and outputs a control signal according to the comparison result; the control signal is fed back to the control switches corresponding to the transformers through the communication line.

Furthermore, a pre-judgment set value is preset in the pre-judgment module, a plurality of maintenance schemes are stored in the pre-judgment module, the central processing unit in the data module compares the received data with the pre-judgment set value, and triggers different maintenance schemes according to the comparison result, and the central processing unit outputs the triggered maintenance schemes through signals.

Furthermore, the operation and maintenance platform is provided with judgment parameters, signals transmitted by the operation and maintenance platform communication module are compared with the judgment parameters, corresponding early warning is given, early warning signals are transmitted to workers, and the workers perform field inspection and maintenance.

Further, the vibration sensor is an analog sensor or a digital sensor.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the data acquisition is convenient: the monitoring device not only can independently install the vibration sensor in each transformer, but also can be compatible with the transformer equipped with the vibration sensor.

2. Multi-transformer simultaneous monitoring: utilize the multichannel characteristic of data module, can compare the mounting dimension littleer with traditional single channel module to many transformers sampling monitoring of electric power system simultaneously, more practice thrift installation space.

3. The energy consumption is low: the monitoring device has the integrated multi-channel characteristic, and compared with the traditional multi-single-channel module, the monitoring device has the advantages that the energy consumption is lower when the same number of transformer data are received and sent, and the service life is longer.

4. The expandability is strong: for the condition that the number of transformers is large, an extended data module without a CPU can be additionally arranged, all data modules share one CPU, and the expansibility is strong.

Drawings

Fig. 1 is a schematic diagram of a vibration data acquisition structure of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is a structural diagram of the flow direction of vibration data according to the present invention;

fig. 4 is a schematic flow chart of vibration data determination according to the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 and 2, the vibration detection device comprises a plurality of vibration sensors, the vibration sensors are arranged at different positions of a transformer, the vibration sensors are digital sensors, the vibration sensors are transmitted to a vibration module through wired communication or wireless communication, the vibration module transmits vibration signals to a detection device, and the detection device is a data module. The output end of the vibration sensor is connected with a data module through a communication link, the output end of the data module is connected to control switches corresponding to the transformers through cables, the output end of the data module is connected with a communication module through a cable, the communication module is in signal connection with a local control center, and the communication module is in signal connection with an operation and maintenance platform. And a damping device is arranged at the bottom of the transformer. The damping device is a spring and is a shock absorber.

Further, the utility model discloses a preferable structure of a transformer vibration electric power operation maintenance monitoring device, wherein a plurality of vibration sensors are arranged on the outer surface of the iron core of the transformer, and a plurality of vibration sensors are arranged in the middle of the coil of the transformer; the vibration sensors are arranged in transformer oil of the transformer.

The data module comprises a central processing unit and a memory; the central processing unit is connected with the memory through a bus.

A self-diagnosis module and a pre-judgment module are arranged in a memory preset in the memory, a protection set value is preset in the self-diagnosis module, a central processing unit in the data module compares the received data with the protection set value, and a control signal is output according to a comparison result; the control signal is fed back to the control switches corresponding to the transformers through the communication line.

When the analog vibration sensor is adopted, the vibration sensor is connected to the vibration module through a wired communication line, a conditioning circuit for preprocessing a signal of the vibration sensor is arranged in the vibration module, the input end of the conditioning circuit is connected with the vibration sensor, the output end of the conditioning circuit is connected with an A/D conversion circuit, and the A/D conversion circuit converts an analog signal into a digital signal and transmits the digital signal to the data module.

Therefore, real-time vibration acquisition is realized, so that the vibration of the cable can be monitored in real time, and the safe operation of the transformer is ensured.

The data transmission process is as shown in fig. 3, the vibration sensor transmits the acquired vibration data to the memory in the data module through the data acquisition channel, and the memory performs data interaction with the processor. And the CPU runs the preset programs in the self-diagnosis module and the pre-judgment module and sends the results out through the communication device.

The operation process of the self-diagnosis module and the pre-judgment module is as shown in fig. 4, the vibration data value a measured by the vibration sensor is transmitted to the memory in the data module, and the memory transmits the data to the CPU. And when the vibration data value a is less than or equal to the vibration protection value Asp, the data module does not respond and continues the next cycle. When the vibration data value a is larger than the vibration protection value Asp, the data module sends out an alarm signal through a cable or controls an electric control switch connected with the transformer to trip, so as to protect the safety of the power supply circuit.

Meanwhile, the data module sends the processed result to a local control center through the communication module and sends the processed result to the operation and maintenance platform through a network access. The vibration protection value Asp is determined according to the factory maximum working vibration value, so that the cable is not dangerous.

The pre-judging module is preset with a pre-judging set value Ayp on the transformer, the CPU compares the vibration data value a with the pre-judging set value Ayp, and when the vibration data value a is less than or equal to the pre-judging set value Ayp, the data module does not respond and continues the next cycle. When the vibration data value a is larger than the predetermined value Ayp, the data module triggers a maintenance scheme to protect the safety of the power supply circuit.

Meanwhile, the data module sends the processed result to a local control center through the communication module and sends the processed result to the operation and maintenance platform through a network access.

The prejudgment set value Ayp is a parameter specific to the monitoring device, and is a recommended value obtained by considering aspects such as a transformer factory characteristic curve, an operation record over the years, a preventive test report, environmental vibration and the like.

And adjusting according to the working current and the environmental vibration value of the cable by taking the safe vibration value of the cable produced and delivered as a standard. The fine adjustment is also carried out according to the service life and the service environment of the cable, when the working environment is higher, the pre-judgment set value Ayp is properly reduced, and when the heavy load time is too long, the pre-judgment set value Ayp is properly reduced. In this way, the operational safety of the cable is ensured.

The maintenance scheme comprises the following steps:

the first-level maintenance scheme comprises the following steps: for on-line inspection, whether each operation parameter of the transformer is normal or not and the operation condition of the load on the lower stage of the transformer are inspected.

And (3) secondary maintenance scheme: for the power failure inspection, the load carried by the transformer is mainly inspected and measured to confirm the fault reason.

A three-level maintenance scheme: for the power failure inspection, annual inspection and preventive tests including characteristic tests are performed on the whole transformer.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a transformer vibration electric power operation maintenance monitoring devices which characterized in that: the vibration control system comprises a plurality of vibration sensors, wherein the vibration sensors are arranged at different positions of a transformer, the output ends of the vibration sensors are connected with a data module through communication links, the output ends of the data module are connected to control switches corresponding to the transformer through cables, the output ends of the data module are connected with a communication module through cables, the communication module is in signal connection with a local control center, and the communication module is in signal connection with an operation and maintenance platform; and a damping device is arranged at the bottom of the transformer.

2. The device for monitoring the operation and maintenance of the transformer with vibration power as claimed in claim 1, wherein: the vibration sensors are arranged on the outer surface of the transformer, and the vibration sensors are arranged on a fixing frame of the transformer; the vibration sensors are arranged in a cooling device of the transformer; the vibration sensors are arranged on the spatial positions which are 20-50 cm away from the transformer.

3. The device for monitoring the operation and maintenance of the transformer with vibration power as claimed in claim 2, wherein: the data module comprises a central processing unit and a memory; the central processing unit is connected with the memory through a bus.

4. A transformer vibration power operation maintenance monitoring device according to claim 3, wherein: a self-diagnosis module and a pre-judgment module are arranged in a memory preset in the memory, a protection set value is preset in the self-diagnosis module, a central processing unit in the data module compares the received data with the protection set value, and a control signal is output according to a comparison result; the control signal is fed back to the control switches corresponding to the transformers through the communication line.

5. The transformer vibration power operation maintenance monitoring device according to claim 4, wherein: the pre-judging module is preset with a pre-judging set value, the pre-judging module is stored with a plurality of maintenance schemes, the central processing unit in the data module compares the received data with the pre-judging set value and triggers different maintenance schemes according to the comparison result, and the central processing unit outputs the triggered maintenance schemes through signals.

6. The transformer vibration power operation maintenance monitoring device according to claim 5, wherein: and judging parameters are arranged in the operation and maintenance platform, signals transmitted by the operation and maintenance platform communication module are compared with the judging parameters, corresponding early warning is given, early warning signals are transmitted to workers, and the workers perform field inspection and maintenance.

7. A transformer vibratory power operation maintenance monitoring device as claimed in any one of claims 1-6, wherein: the vibration sensor is an analog sensor or a digital sensor.