CN110764025A - Fault detection device and method for external insulation of power transformation equipment - Google Patents

Fault detection device and method for external insulation of power transformation equipment Download PDF

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CN110764025A
CN110764025A CN201911013355.3A CN201911013355A CN110764025A CN 110764025 A CN110764025 A CN 110764025A CN 201911013355 A CN201911013355 A CN 201911013355A CN 110764025 A CN110764025 A CN 110764025A
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temperature
external insulation
power transformation
transformation equipment
fault
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胡义军
殷少奇
彭睿
荆伟
任荣庆
刘冰
杨鸿雁
刘强
陈涛
齐丹
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HANZHONG POWER SUPPLY COMPANY STATE GRID SHAANX ELECTRIC POWER Co Ltd
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HANZHONG POWER SUPPLY COMPANY STATE GRID SHAANX ELECTRIC POWER Co Ltd
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    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract

The invention is applicable to the technical field of power system fault detection, and provides a fault detection device and method for external insulation of power transformation equipment. The device includes: the system comprises at least three infrared temperature measuring probes, a data processing module and a display terminal; the at least three infrared temperature measuring probes are respectively arranged on at least three positions of the external insulation of the detected power transformation equipment; each infrared temperature measuring probe acquires temperature data on a corresponding position of the external insulation of the power transformation equipment in real time and sends the temperature data to the data processing module; the data processing module fuses the temperature data on at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values, and the display terminal displays the current fault state of the external insulation of the power transformation equipment according to the temperature diagnostic values. The invention can accurately detect the fault state of the external insulation of the power transformation equipment in real time, and has good detection effect and engineering practical value.

Description

Fault detection device and method for external insulation of power transformation equipment
Technical Field
The invention belongs to the technical field of power system fault detection, and particularly relates to a fault detection device and method for external insulation of power transformation equipment.
Background
The rapid development of social economy and the improvement of the degree of modernization undoubtedly have higher and higher requirements on the safety, economy and reliability of power supply, and the transformer substation is used as an important component of a power system, and the stable and safe operation of transformer substation equipment becomes a primary task of transformer substation operation and maintenance. Various faults often occur to the substation equipment in long-term operation, the overall or local temperature of the substation equipment with the faults can change, and the thermal image characteristics of the substation equipment are greatly different from those of the substation equipment in a normal state.
At present, the interior of a transformer substation is mainly divided into two blocks which generate heat: firstly, metal parts generate heat, for example, a moving contact component inside a circuit breaker generates heat due to poor contact, a medium loss is increased due to damp inside a circuit breaker voltage-sharing capacitor or a capacitor unit is aged, damage causes local temperature abnormity of the circuit breaker voltage-sharing capacitor, disconnecting switch knife edge overheating is caused by insufficient contact finger elastic clamping force of a disconnecting switch, and the like, and the type of heat generation can be accurately detected by using an infrared temperature detector in the current market; another type of heat generation is the generation of heat from the external insulation of the power transformation equipment. However, the existing transformer substation external insulation detection system has the problem of inaccurate fault detection, and serious influence is brought to a power system.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a fault detection apparatus and method for external insulation of a substation device, so as to solve the problem that a fault detection system for external insulation of a substation in the prior art is inaccurate in fault detection.
A first aspect of an embodiment of the present invention provides a fault detection apparatus for external insulation of a power transformation device, including: the system comprises at least three infrared temperature measuring probes, a data processing module and a display terminal; the at least three infrared temperature measuring probes are respectively arranged on at least three positions of the external insulation of the detected power transformation equipment;
each infrared temperature measuring probe is connected with the data processing module and used for acquiring temperature data on the corresponding position of the external insulation of the power transformation equipment in real time and sending the temperature data to the data processing module
The data processing module is connected with the display terminal and used for fusing temperature data on at least three positions based on a temperature diagnostic value model to obtain temperature diagnostic values and sending the temperature diagnostic values to the display terminal;
and the display terminal is used for displaying the current fault state of the external insulation of the power transformation equipment according to the temperature diagnosis value.
Optionally, the data processing module is specifically configured to:
establishing a temperature influence weight of a corresponding position according to the radiance of the external insulation of the power transformation equipment, the current environment temperature and the currently acquired temperature data of the corresponding position;
establishing a temperature diagnostic value model according to the temperature influence weights of the at least three positions and the currently acquired temperature data of the at least three positions;
and fusing the temperature data on the at least three positions based on a temperature diagnostic value model to obtain temperature diagnostic values, and sending the temperature diagnostic values to the display terminal.
Optionally, the temperature diagnostic value model HωThe method comprises the following steps:
Hω=T1·ω1+T2·ω2+…+Ti·ωi,ωi=Ti/θη
wherein, TiFor the currently acquired temperature data of the i-th position, ωiThe temperature influence weight of the ith position is theta, the current environment temperature is theta, and the emissivity of the external insulation of the power transformation equipment is η.
Optionally, the data processing module includes: the device comprises a data acquisition chip, a data processing chip and a signal sending unit;
the data acquisition chip is connected with each infrared temperature measurement probe and the data processing chip and is used for acquiring temperature data acquired by each infrared temperature measurement probe;
the data processing chip is connected with the signal sending unit and used for fusing temperature data on at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values;
and the signal sending unit is connected with the display terminal and is used for sending the temperature diagnosis value to the display terminal.
Optionally, the signal sending unit includes: the circuit comprises a voltage stabilizing circuit, an impedance matching circuit and an E/O conversion circuit;
the input end of the voltage stabilizing circuit is connected with the data processing chip, and the output end of the voltage stabilizing circuit is connected with the input end of the impedance matching circuit; the output end of the impedance matching circuit is connected with the input end of the E/O conversion circuit; and the output end of the E/O conversion circuit is connected with the display terminal.
Optionally, the display terminal is specifically configured to:
judging whether the temperature diagnosis value is within a normal state value range, and if so, displaying that the external insulation of the power transformation equipment is in a normal state;
or judging whether the temperature diagnostic value is within the critical fault value range, and if so, displaying that the external insulation of the power transformation equipment is in a dangerous state;
or judging whether the temperature diagnosis value is in the fault alarm range, if so, displaying that the external insulation of the power transformation equipment is in the fault maintenance state, and giving an alarm.
Optionally, the display terminal is further configured to:
recording the times of the external insulation of the power transformation equipment in the dangerous state, and sending alarm information to a preset terminal when the times of the dangerous state reach preset dangerous times.
A second aspect of the embodiments of the present invention provides a method for detecting a fault of an external insulation of a power transformation device, including:
obtaining temperature data of at least three positions of external insulation of power transformation equipment in real time
Fusing the temperature data on the at least three positions based on a temperature diagnostic value model to obtain temperature diagnostic values;
and determining the fault state of the current external insulation of the power transformation equipment according to the temperature diagnostic value.
Optionally, the fusing the temperature data at the at least three positions based on the temperature diagnostic value model to obtain the temperature diagnostic value includes:
establishing a temperature influence weight of a corresponding position according to the radiance of the external insulation of the power transformation equipment, the current environment temperature and the currently acquired temperature data of the corresponding position;
establishing a temperature diagnostic value model according to the temperature influence weights of the at least three positions and the currently acquired temperature data of the at least three positions;
and fusing the temperature data on at least three positions which are currently collected based on the temperature diagnostic value model to obtain temperature diagnostic values.
Optionally, determining a fault state of the external insulation of the current power transformation device according to the temperature diagnostic value includes:
judging whether the temperature diagnosis value is within a normal state value range, and if so, determining that the external insulation of the power transformation equipment is in a normal state;
or judging whether the temperature diagnostic value is within the critical fault value range, and if so, determining that the external insulation of the power transformation equipment is in a dangerous state;
or judging whether the temperature diagnosis value is in a fault alarm range, if so, determining that the external insulation of the power transformation equipment is in a fault maintenance state, and giving an alarm.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the device mainly comprises at least three infrared temperature measuring probes, a data processing module and a display terminal, and is simple in structure and convenient to operate and control; the at least three infrared temperature measuring probes are respectively arranged at least three positions of the external insulation of the detected power transformation equipment, and the temperature data of the external insulation is detected at multiple positions; every infrared temperature probe gathers the temperature data on the corresponding position of substation equipment external insulation in real time, and data processing module fuses the temperature data on at least three position based on the diagnostic value model of temperature and obtains the diagnostic value of temperature, and display terminal shows current substation equipment external insulation's fault state according to the diagnostic value of temperature, has realized real-time accurate detection substation equipment external insulation's trouble to carry out multidata analysis, have good detection effect and engineering practical value.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a fault detection device for external insulation of a power transformation apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a data processing module according to an embodiment of the present invention;
fig. 3 is a schematic flow chart illustrating an implementation of a fault detection method for external insulation of a power transformation device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a specific implementation flow of step S302 in fig. 3.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular method and apparatus structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods and devices, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, the present embodiment provides a fault detection device for external insulation of a power transformation device, which mainly includes at least three infrared temperature measurement probes, a data processing module 100 and a display terminal 200; the output end of each infrared temperature probe is connected with the input end of the data processing module 100, the output end of the data processing module 100 is connected with the input end of the display terminal 200, and at least three infrared temperature probes are respectively arranged on at least three positions of the external insulation of the detected power transformation equipment.
Each infrared temperature measuring probe acquires temperature data on a corresponding position of the external insulation of the power transformation equipment in real time and sends the temperature data to the data processing module 100; the data processing module 100 fuses the temperature data at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values, and sends the temperature diagnostic values to the display terminal 200; and the display terminal 200 is used for displaying the current fault state of the external insulation of the power transformation equipment according to the temperature diagnosis value.
The existing external insulation detection system of the transformer substation mainly measures a single heating point or the highest temperature of a single small area to judge the fault state of equipment, but the overall state of the equipment cannot be found by single data, so that a point leakage easily occurs, and generally, an insulating fault of the equipment is difficult to find, so that a series of problems of inaccurate detection, single acquired data, failure analysis and the like exist in the field application process. Based on the existing external insulation detection difficulty, the fault detection device can effectively detect the external insulation state of the power transformation equipment, is combined with a temperature fusion method, greatly improves the detection precision compared with other methods, has super-strong sensitivity, and can provide great engineering practical application value for the insulation defect detection of the power transformation equipment.
For example, referring to fig. 1, in an embodiment of the fault detection device for external insulation of a power transformation device of the present invention, the device may include three infrared temperature measurement probes (e.g., infrared temperature measurement a, infrared temperature measurement B, and infrared temperature measurement C), a data processing module 100, and a display terminal 200. The temperature data of the external insulation medium in three directions or three positions of the tested power transformation equipment are collected through the infrared probe A, the infrared probe B and the infrared probe C, the temperature data in the three directions are transmitted to the data processing module 100, the data processing module 100 fuses the temperature data in at least three positions based on the temperature diagnosis value model to obtain temperature diagnosis values, and the display terminal 200 displays the current fault state of the external insulation of the power transformation equipment according to the temperature diagnosis values.
For example, if the cross section of the power transformation device is circular, the three infrared temperature measurement probes are arranged on the outer insulation of the power transformation device at intervals of 120 degrees, and if the cross section of the power transformation device is rectangular, the four infrared temperature measurement probes can be arranged on each outer side surface of the outer insulation of the power transformation device.
This embodiment does not restrict the number of infrared temperature probe, can be 3, also can be i, and wherein i >3, it is corresponding, and the position of gathering substation equipment external insulation also can be a plurality of, infrared temperature probe and the position one-to-one of gathering substation equipment external insulation.
The infrared detection device for the external insulation of the transformer equipment can carry out multi-position and integral detection on the external insulation of the transformer equipment, the problem that the detection caused by single data has a missing point or inaccurate detection is avoided, and the fault state of the external insulation of the transformer equipment is accurately detected by analyzing a temperature diagnosis value model.
Optionally, the infrared temperature measurement probe of this embodiment may adopt an IR22 infrared temperature sensor manufactured by camet corporation, and the probe has the advantages of high cost performance, applicability to low temperature of-60 ℃, fast response of 0.1 second, design of a slim small probe, and the like, and specific technical parameters are shown in table 1.
TABLE 1 technical parameters of IR22 Infrared temperature sensor
Temperature range -50~375℃
Display resolution 0.1℃
Emissivity 0.10 to 0.99 (adjustable by software)
Response time Less than or equal to 0.1 second
Accuracy of measurement 2 ℃ or +/-1% (in high value)
Optical resolution (D: S) 10:1
Spectral response 8~14μm
Repeatability of 1% reading
Analog output 4~20mA
Communication signal RS-485 bus signal
Power input 12 to 24V DC (maximum 50mA)
In an embodiment, the data processing module 100 of this embodiment may be specifically configured to:
and establishing the temperature influence weight of the corresponding position according to the radiance of the external insulation of the power transformation equipment, the current environment temperature and the currently acquired temperature data of the corresponding position.
And establishing a temperature diagnostic value model according to the temperature influence weights of the at least three positions and the currently acquired temperature data of the at least three positions.
And fusing the temperature data at the at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values, and sending the temperature diagnostic values to the display terminal 200.
Optionally, a temperature diagnostic value model HωThe method can comprise the following steps:
Hω=T1·ω1+T2·ω2+…+Ti·ωi,ωi=Ti/θη
wherein, TiFor the currently acquired temperature data of the i-th position, ωiThe emissivity η of the external insulation of the power transformation device is determined by a medium of the external insulation of the power transformation device to be measured, and the corresponding emissivity needs to be input on the display terminal 200 before measurement, common external insulation of the device is plastic, rubber, glass and ceramic, wherein the emissivity is respectively plastic (0.95), rubber (0.95), glass (0.85) and ceramic (0.95), and when the medium is not clear, the emissivity can be set to be 0.95.
Further, fusing the temperature data at the at least three positions based on the temperature diagnostic value model to obtain the temperature diagnostic value H specifically includes: by passing
Figure BDA0002244859950000081
Wherein H0Is an initial temperature fusion value, H0May be the average of the temperature data of at least three locations currently acquired, e.g.
Figure BDA0002244859950000082
The median, variance, etc. of the temperature data for the at least three locations that are currently acquired may also be used. The following are exemplary: the temperature data of different positions collected by the infrared temperature measuring probe A, the infrared temperature measuring probe B and the infrared temperature measuring probe C are respectively Ta、Tb、TcThe current environment temperature is theta, η is the radiance of the external insulation of the power transformation equipment, and the temperature influence weight is omega respectivelya,ωb,ωcAnd calculating to obtain a temperature diagnostic value H, which is as follows:
Figure BDA0002244859950000083
Hω=Ta·ωa+Tb·ωb+Tc·ωc
ωa=Ta/θη
ωb=Tb/θη
ωc=Tc/θη
the smaller the diagnostic temperature value H is, the better the insulation state of the measured power transformation equipment is, and when the value H is larger than 1, the abnormal state of the measured power transformation equipment is represented, and the larger the diagnostic temperature value H is, the worse the insulation state of the power transformation equipment is.
The temperature state of the current external insulation of the power transformation equipment can be accurately analyzed by adopting the temperature diagnostic value model, and the fault condition of the corresponding equipment can be further predicted, so that the monitoring is more accurate and reliable, the fault prediction is more timely, and unnecessary loss is avoided.
Optionally, the data processing module 100 of this embodiment may include: a data acquisition chip 110, a data processing chip 120 and a signal transmission unit 130; the input end of the data acquisition chip 110 is connected with each infrared temperature measurement probe, the output end of the data acquisition chip 110 is connected with the input end of the data processing chip 120, the output end of the data processing chip 120 is connected with the input end of the signal sending unit 130, and the output end of the signal sending unit 130 is connected with the input end of the display terminal 200. The data acquisition chip 110 acquires temperature data at least three positions, and the data processing chip 120 fuses the temperature data at the at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values; the signal transmitting unit 130 transmits the temperature diagnostic value to the display terminal 200.
The data acquisition chip 110 of this embodiment may be an ADuC841v model chip, and has a simple structure, a small volume, and a low cost. The data processing chip 120 of the present embodiment may be a DSP chip. Optionally, the DSP chip of the present invention may be a model chip of TMS320C1X/C2X of TI corporation, which has several advantages as follows: 1) one multiplication and one addition can be completed in one instruction cycle; 2) the program and the data space are separated, and the instruction and the data can be accessed simultaneously; 3) the chip is provided with a fast RAM which can be accessed in two blocks simultaneously through independent data buses; 4) hardware support with low or no overhead loops and jumps; 5) fast interrupt handling and hardware I/O support; 6) having a plurality of hardware address generators operating in a single cycle; 7) multiple operations may be performed in parallel; 8) and pipeline operation is supported, so that the operations of fetching, decoding, executing and the like can be executed in an overlapping way. The data processing process of the DSP chip is quicker, so that fault detection is more timely, the cost is saved, and the loss of a power transformation system is reduced.
In one embodiment, referring to fig. 2, the signal transmitting unit 130 includes: a voltage stabilizing circuit 131, an impedance matching circuit 132, and an E/O (electrical/optical) conversion circuit; the input end of the voltage stabilizing circuit 131 is connected with the output end of the data processing chip 120, and the output end of the voltage stabilizing circuit 131 is connected with the input end of the impedance matching circuit 132; the output end of the impedance matching circuit 132 is connected with the input end of the E/O conversion circuit 131; an output terminal of the E/O conversion circuit 131 is connected to the display terminal 200. The voltage stabilizing circuit 131 outputs the temperature diagnostic value to the E/O conversion circuit 133 through the impedance matching circuit 132, and the E/O conversion circuit 133 converts the temperature diagnostic value into an optical signal to be transmitted to the display terminal 200. Further, the E/O conversion circuit 133 may be connected to the display terminal 200 through an optical fiber, or may be wirelessly connected to the display terminal 200, so as to reduce wiring and save space.
Optionally, the fault detection apparatus of this embodiment may further include: and a power supply module. The power module is connected with the data acquisition chip 110, the data processing chip 120, the voltage stabilizing circuit 131, the impedance matching circuit 132 and the E/O conversion circuit 133, and supplies power to each chip or circuit to ensure the stable operation of the device.
In one embodiment, the display terminal 200 may be specifically configured to:
and judging whether the temperature diagnosis value is within a normal state value range, and if so, displaying that the external insulation of the power transformation equipment is in a normal state.
Or judging whether the temperature diagnosis value is within the critical fault value range, and if so, displaying that the external insulation of the power transformation equipment is in a dangerous state.
Or judging whether the temperature diagnosis value is in a fault alarm range, if so, displaying that the external insulation of the power transformation equipment is in a fault maintenance state, and giving an alarm.
The display terminal 200 may display a temperature diagnosis value and a fault state of the external insulation of the power transformation device for a computer or an industrial personal computer or other terminals. The display terminal 200 sends out the alarm through any one or more alarm modes such as flashing data, alarm sound, alarm short message, alarm mail and the like which are not stopped in the display screen, and also can directly send the alarm information to the mobile phone of the working personnel through the APP, so that the working personnel can check and maintain the alarm information visually in time, get rid of the fault as soon as possible, and reduce unnecessary loss.
Optionally, the display terminal 200 of this embodiment may be further configured to: recording the times of the external insulation of the transformer equipment in the dangerous state, facilitating comprehensive detection and analysis of the equipment by workers, and sending alarm information to a preset terminal when the times of the dangerous state reach preset dangerous times.
Display terminal 200 is also used for receiving the instruction of looking over that predetermine the terminal and send, for example the staff looks over the state of substation equipment external insulation through cell-phone APP, then sends the instruction of looking over to display terminal 200. After receiving a checking instruction sent by a preset terminal, the display terminal 200 sends a temperature diagnosis value and fault state information of external insulation of the power transformation equipment to the preset terminal; or after receiving an instruction of successfully establishing communication connection with a preset terminal, sending the temperature diagnosis value and fault state information of the external insulation of the transformer equipment to the preset terminal; or, the temperature diagnosis value and the fault state information of the external insulation of the power transformation equipment are sent to a preset terminal at preset time intervals.
Optionally, the display terminal 200 is further configured to store the temperature diagnostic value and the fault state information of the external insulation of the power transformation device, and generate a corresponding state chart or state document, so that a worker can comprehensively detect and analyze the device, and stable operation of the device is ensured.
In the above embodiment, the fault detection device for the external insulation of the power transformation equipment mainly comprises at least three infrared temperature measurement probes, a data processing module 100 and a display terminal 200, and has a simple structure and is convenient to operate and control; the at least three infrared temperature measuring probes are respectively arranged at least three positions of the external insulation of the detected power transformation equipment, and the temperature data of the external insulation is detected at multiple positions; every infrared temperature probe gathers the temperature data on the corresponding position of substation equipment external insulation in real time, and data processing module 100 fuses the temperature data on at least three position based on the diagnostic value model of temperature and obtains the diagnostic value of temperature, and display terminal 200 shows the fault state of current substation equipment external insulation according to the diagnostic value of temperature, has realized real-time accurate detection substation equipment external insulation's trouble to carry out multidata analysis, have good detection effect and engineering practical value.
Corresponding to the fault detection device for the external insulation of the power transformation equipment in the above embodiment, the present embodiment provides a fault detection method for the external insulation of the power transformation equipment. Referring to fig. 3, an implementation flow diagram of an embodiment of a fault detection method for external insulation of a power transformation device is described in detail as follows:
s301, acquiring temperature data of at least three positions of external insulation of the power transformation equipment in real time.
S302, fusing the temperature data of the at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values.
And S303, determining the fault state of the current external insulation of the power transformation equipment according to the temperature diagnosis value.
Optionally, referring to fig. 4, a specific implementation process of fusing the temperature data at the at least three positions based on the temperature diagnostic value model in step S302 to obtain the temperature diagnostic value includes:
step S401, establishing temperature influence weight of a corresponding position according to the radiance of the external insulation of the power transformation equipment, the current environment temperature and the currently acquired temperature data of the corresponding position;
step S402, establishing a temperature diagnosis value model according to the temperature influence weights of at least three positions and the currently acquired temperature data of at least three positions;
step S403, fusing the temperature data on at least three positions which are currently collected based on the temperature diagnostic value model to obtain temperature diagnostic values.
Optionally, a temperature diagnostic value model HωThe method can comprise the following steps:
Hω=T1·ω1+T2·ω2+…+Ti·ωi,ωi=Ti/θη
wherein, TiFor the currently acquired temperature data of the i-th position, ωiThe emissivity η of the external insulation of the power transformation equipment is determined by a medium of the external insulation of the tested power transformation equipment, and common external insulation of the equipment is plastic, rubber, glass and ceramic, wherein the emissivity is respectively plastic (0.95), rubber (0.95), glass (0.85) and ceramic (0.95), and when the medium is not clear, the emissivity can be set to be 0.95.
Further, fusing the temperature data at the at least three positions based on the temperature diagnostic value model to obtain the temperature diagnostic value H specifically includes: by passing
Wherein H0Is an initial temperature fusion value, H0May be the average of the temperature data of at least three locations currently acquired, e.g.
Figure BDA0002244859950000122
The median, variance, etc. of the temperature data for the at least three locations that are currently acquired may also be used.
Optionally, determining a fault state of the external insulation of the current power transformation device according to the temperature diagnostic value includes:
judging whether the temperature diagnosis value is within a normal state value range, and if so, determining that the external insulation of the power transformation equipment is in a normal state;
or judging whether the temperature diagnostic value is within the critical fault value range, and if so, determining that the external insulation of the power transformation equipment is in a dangerous state;
or judging whether the temperature diagnosis value is in a fault alarm range, if so, determining that the external insulation of the power transformation equipment is in a fault maintenance state, and giving an alarm.
Optionally, the method may further include: recording the times of the external insulation of the power transformation equipment in the dangerous state, and sending alarm information to a preset terminal when the times of the dangerous state reach preset dangerous times.
In the embodiment, the temperature data of at least three positions of the external insulation of the power transformation equipment are collected in real time through the infrared temperature measurement probe to form multi-data analysis; the temperature data on at least three positions are fused based on the temperature diagnostic value model to obtain temperature diagnostic values, the current fault state of the external insulation of the power transformation equipment is determined according to the temperature diagnostic values, the fault of the external insulation of the power transformation equipment is accurately detected in real time, and the method has good detection effect and engineering practical value.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing functional units and models are merely illustrated as being divided, and in practical applications, the foregoing functional allocations may be performed by different functional units and modules as needed, that is, the internal structure of the device may be divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a fault detection device of substation equipment external insulation which characterized in that includes: the system comprises at least three infrared temperature measuring probes, a data processing module and a display terminal; the at least three infrared temperature measuring probes are respectively arranged on at least three positions of the external insulation of the detected power transformation equipment;
each infrared temperature measuring probe is connected with the data processing module and used for acquiring temperature data on the corresponding position of the external insulation of the power transformation equipment in real time and sending the temperature data to the data processing module
The data processing module is connected with the display terminal and used for fusing temperature data on at least three positions based on a temperature diagnostic value model to obtain temperature diagnostic values and sending the temperature diagnostic values to the display terminal;
and the display terminal is used for displaying the current fault state of the external insulation of the power transformation equipment according to the temperature diagnosis value.
2. The apparatus for detecting a fault in an external insulation of a transformer device according to claim 1, wherein the data processing module is specifically configured to:
establishing a temperature influence weight of a corresponding position according to the radiance of the external insulation of the power transformation equipment, the current environment temperature and the currently acquired temperature data of the corresponding position;
establishing a temperature diagnostic value model according to the temperature influence weights of the at least three positions and the currently acquired temperature data of the at least three positions;
and fusing the temperature data on the at least three positions based on a temperature diagnostic value model to obtain temperature diagnostic values, and sending the temperature diagnostic values to the display terminal.
3. The apparatus for detecting the fault in the external insulation of the power transformation equipment as claimed in claim 2, wherein the temperature diagnostic value model HωThe method comprises the following steps:
Hω=T1·ω1+T2·ω2+…+Ti·ωi,ωi=Ti/θη
wherein, TiFor the currently acquired temperature data of the i-th position, ωiThe temperature influence weight of the ith position is theta, the current environment temperature is theta, and the emissivity of the external insulation of the power transformation equipment is η.
4. The fault detection device for external insulation of substation equipment as recited in claim 1, wherein said data processing module comprises: the device comprises a data acquisition chip, a data processing chip and a signal sending unit;
the data acquisition chip is connected with each infrared temperature measurement probe and the data processing chip and is used for acquiring temperature data acquired by each infrared temperature measurement probe;
the data processing chip is connected with the signal sending unit and used for fusing temperature data on at least three positions based on the temperature diagnostic value model to obtain temperature diagnostic values;
and the signal sending unit is connected with the display terminal and is used for sending the temperature diagnosis value to the display terminal.
5. The apparatus for detecting a fault in the external insulation of a transformation apparatus according to claim 4, wherein the signal transmission unit comprises: the circuit comprises a voltage stabilizing circuit, an impedance matching circuit and an E/O conversion circuit;
the input end of the voltage stabilizing circuit is connected with the data processing chip, and the output end of the voltage stabilizing circuit is connected with the input end of the impedance matching circuit; the output end of the impedance matching circuit is connected with the input end of the E/O conversion circuit; and the output end of the E/O conversion circuit is connected with the display terminal.
6. The fault detection device for the external insulation of the power transformation equipment as claimed in any one of claims 1 to 5, wherein the display terminal is specifically configured to:
judging whether the temperature diagnosis value is within a normal state value range, and if so, displaying that the external insulation of the power transformation equipment is in a normal state;
or judging whether the temperature diagnostic value is within the critical fault value range, and if so, displaying that the external insulation of the power transformation equipment is in a dangerous state;
or judging whether the temperature diagnosis value is in the fault alarm range, if so, displaying that the external insulation of the power transformation equipment is in the fault maintenance state, and giving an alarm.
7. The apparatus of claim 6, wherein the display terminal is further configured to:
recording the times of the external insulation of the power transformation equipment in the dangerous state, and sending alarm information to a preset terminal when the times of the dangerous state reach preset dangerous times.
8. A fault detection method for external insulation of a power transformation device is characterized by comprising the following steps:
obtaining temperature data of at least three positions of external insulation of power transformation equipment in real time
Fusing the temperature data on the at least three positions based on a temperature diagnostic value model to obtain temperature diagnostic values;
and determining the fault state of the current external insulation of the power transformation equipment according to the temperature diagnostic value.
9. The method for detecting the fault of the external insulation of the power transformation equipment as claimed in claim 8, wherein the fusing the temperature data at the at least three positions based on the temperature diagnostic value model to obtain the temperature diagnostic value comprises:
establishing a temperature influence weight of a corresponding position according to the radiance of the external insulation of the power transformation equipment, the current environment temperature and the currently acquired temperature data of the corresponding position;
establishing a temperature diagnostic value model according to the temperature influence weights of the at least three positions and the currently acquired temperature data of the at least three positions;
and fusing the temperature data on at least three positions which are currently collected based on the temperature diagnostic value model to obtain temperature diagnostic values.
10. The method for detecting the fault of the external insulation of the power transformation equipment as claimed in claim 8 or 9, wherein the step of determining the fault state of the current external insulation of the power transformation equipment according to the temperature diagnostic value comprises the following steps:
judging whether the temperature diagnosis value is within a normal state value range, and if so, determining that the external insulation of the power transformation equipment is in a normal state;
or judging whether the temperature diagnostic value is within the critical fault value range, and if so, determining that the external insulation of the power transformation equipment is in a dangerous state;
or judging whether the temperature diagnosis value is in a fault alarm range, if so, determining that the external insulation of the power transformation equipment is in a fault maintenance state, and giving an alarm.
CN201911013355.3A 2019-10-23 2019-10-23 Fault detection device and method for external insulation of power transformation equipment Pending CN110764025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911013355.3A CN110764025A (en) 2019-10-23 2019-10-23 Fault detection device and method for external insulation of power transformation equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911013355.3A CN110764025A (en) 2019-10-23 2019-10-23 Fault detection device and method for external insulation of power transformation equipment

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111624445A (en) * 2020-04-29 2020-09-04 珠海一多监测科技有限公司 Partial discharge detection method and system based on infrared temperature measurement sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111624445A (en) * 2020-04-29 2020-09-04 珠海一多监测科技有限公司 Partial discharge detection method and system based on infrared temperature measurement sensor
CN111624445B (en) * 2020-04-29 2023-06-09 珠海一多监测科技有限公司 Partial discharge detection method and system based on infrared temperature sensor

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