CN109324255A - Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss - Google Patents
Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss Download PDFInfo
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- CN109324255A CN109324255A CN201811399605.7A CN201811399605A CN109324255A CN 109324255 A CN109324255 A CN 109324255A CN 201811399605 A CN201811399605 A CN 201811399605A CN 109324255 A CN109324255 A CN 109324255A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The application provides a kind of transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss, power loss can be monitored by the data operation judgment module, the contact fault of the joint of bushing shell for transformer can be diagnosed by the infrared diagnostics module, further monitor transformer shorted-turn fault so as to realize from many aspects.Therefore, by the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss transformer shorted-turn fault can be monitored with high efficiency, and it can be detected from many aspects by the data operation judgment module and the infrared diagnostics module, failure can be found in time in failure early stage and fault-signal is uploaded to control centre, it avoids that interruption of service occurs, extend the actual life of transformer, power supply reliability is improved, the convenience and accuracy of detection transformer shorted-turn fault are improved.
Description
Technical field
This application involves distribution transformer fault diagnosises, short more particularly to a kind of transformer turn-to-turn based on electric energy loss
Road on-line monitoring system and method.
Background technique
Distribution transformer is the high voltage electric equipment that the conversion of different voltages grade electric energy is realized in electric system, carries and turns
The task of voltage and current and transmission electric power is changed, therefore the quality of distribution transformer performance will directly affect electric system
Safe and stable operation.Meanwhile its normal operation is the key that entire distribution network system operates normally.Circle occurs for distribution transformer
Between after short trouble, failure winding can generate very big short circuit current, and the various losses such as calorific value increase, and destroy in turn exhausted
Edge causes transformer damage.If finding turn-to-turn short circuit not in time, failure will continue to develop, and eventually lead to burning for transformer,
Strong influence is generated to user, seriously affects power supply safety and power supply reliability.
Traditional transformer shorted-turn fault monitoring is usually to be analyzed by small echo positioning mode, is differentiated by small echo
The radio-frequency component of earth current decomposes when technology is to transformer short-circuit, and whether contrast signal high fdrequency component diagnosis transformer is deposited
In turn-to-turn short circuit situation.Also, traditional transformer turn-to-turn short circuit provisional monitor is usually also needed mainly by Utilities Electric Co.'s distribution
Maintenance personnel carries out field monitoring.Therefore, traditional transformer shorted-turn fault monitor low efficiency, be easy to cause failure to neglect
Slightly.
Summary of the invention
Based on this, it is necessary to for traditional transformer shorted-turn fault monitor low efficiency, be easy to cause failure to neglect
Slightly the problem of, provides a kind of high-efficient, accuracy high reliablity transformer turn-to-turn short circuit on-line monitoring based on electric energy loss
System and method.
It includes electric energy detection list that the application, which provides a kind of transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss,
Member, data processing unit, data transmission unit and failure diagnosis unit.The electric energy detection unit is for acquiring electrical ginseng
Number.The data processing unit is electrically connected with the electric energy detection unit, for the electric parameter to be converted into digital signal,
And the digital signal is transmitted by data transmission unit.The failure diagnosis unit is passed for receiving through the data
The digital signal of defeated unit transmission, and carry out fault diagnosis.The failure diagnosis unit includes data operation judgment module
With infrared diagnostics module, the data operation judgment module is electrically connected with the infrared diagnostics module, the data operation judgement
Module is described for receiving the digital signal transmitted through the data transmission unit and carrying out operation judgement with fault threshold
Infrared diagnostics module is for detecting transformer joint fault.
The electric energy detection unit includes power equipment and detection module in one of the embodiments,.The detection mould
Block is electrically connected with the power equipment, to acquire the electric parameter of the power equipment.
The power equipment is three-phase transformer in one of the embodiments,.
In one of the embodiments, the infrared diagnostics module include the first phase infrared diagnostics module, it is second mutually infrared
Diagnostic module and third phase infrared diagnostics module.The first phase infrared diagnostics module and the data operation judgment module connect
Connect, to detect the first phase transformer connector whether failure.The second phase infrared diagnostics module and the data operation judge
Module electrical connection, to detect the second phase transformer connector whether failure.The third phase infrared diagnostics module and the data
Operation judgment module electrical connection, to detect third phase transformer connector whether failure.
The electric parameter is the power parameter and temperature parameter of the three-phase transformer in one of the embodiments,
The power parameter of the three-phase transformer include input power and the output power of the first phase transformer, the second phase transformer it is defeated
Enter the input power and output power of power and output power and third phase transformer, the temperature parameter of the three-phase transformer
The of second connector temperature of the first connector temperature, the second phase transformer including the first phase transformer and third phase transformer
Three connector temperatures.
The data processing unit includes signal pre-processing module and data acquisition module in one of the embodiments,.
The signal pre-processing module is electrically connected with the detection module, for the electric parameter to be converted into digital signal.It is described
Data acquisition module is electrically connected with the signal pre-processing module, is passed to obtain the digital signal, and by the data
Defeated unit is by the digital data transmission to the failure diagnosis unit.
A kind of transformer turn-to-turn short circuit on-line monitoring method based on electric energy loss in one of the embodiments, comprising:
The total threshold value of electric energy loss, the first electric energy loss threshold value, the second electric energy loss threshold value of three-phase transformer is arranged in S10
And third electric energy loss threshold value, and the first temperature threshold, second temperature threshold value and the third temperature of three-phase transformer are set
Threshold value；
S20, the power parameter and temperature parameter of three-phase transformer described in online acquisition；
The power parameter and the temperature parameter are filtered conversion, the function after obtaining data prediction by S30
Rate parameter and the temperature parameter；
S40 calculates the three-phase transformer with the temperature parameter according to the power parameter after data prediction
Electric energy total losses；
S50, if the electric energy total losses are less than the total threshold value of the electric energy loss, again three phase-change pressures described in online acquisition
The power parameter and temperature parameter of device calculate the first phase electricity if the electric energy total losses are greater than the total threshold value of the electric energy loss
It can loss, the second phase electric energy loss and third phase electric energy loss；
S60, according to the first phase electric energy loss, the second phase electric energy loss and the third phase electric energy loss,
If the first phase electric energy loss is greater than the first electric energy loss threshold value, the first phase transformer breaks down, if described the
Two-phase electric energy loss is greater than the second electric energy loss threshold value, then the second phase transformer breaks down, if the third phase electric energy
Loss is greater than the third electric energy loss threshold value, then third phase transformer breaks down；
S70, according to the fault condition of first phase transformer, the fault condition of second phase transformer and described
The fault condition of third phase transformer carries out fault severity level analysis, and exports diagnostic result.
The step S60 includes: in one of the embodiments,
S611 starts first and mutually infrared examines if the first phase electric energy loss is greater than the first electric energy loss threshold value
Disconnected module；
S612, according to the first phase infrared diagnostics module, if the first connector temperature of first phase transformer is greater than
First temperature threshold, then the connector of first phase transformer breaks down, otherwise the turn-to-turn of first phase transformer
Short circuit.
The step S60 in one of the embodiments, further include:
S621 starts second and mutually infrared examines if the second phase electric energy loss is greater than the second electric energy loss threshold value
Disconnected module；
S622, according to the second phase infrared diagnostics module, if the second connector temperature of second phase transformer is greater than
The second temperature threshold value, then the connector of second phase transformer breaks down, otherwise the turn-to-turn of second phase transformer
Short circuit.
The step S60 in one of the embodiments, further include:
S631, if the third phase electric energy loss greater than the third electric energy loss threshold value, starts, third phase is infrared to be examined
Disconnected module；
S632, according to the third phase infrared diagnostics module, if the third connector temperature of the third phase transformer is greater than
The third temperature threshold, then the connector of the third phase transformer breaks down, otherwise the turn-to-turn of the third phase transformer
Short circuit.
The application provides a kind of transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss.By described
Electric energy detection unit acquires the electric parameter, and the electric parameter is transmitted to the data processing unit.The data
The electric parameter is converted into digital signal by processing unit, and can be wirelessly transmitted to by the data transmission unit described
Failure diagnosis unit.The data operation judgment module receives and carries out operation judgement with fault threshold after the digital signal.
Meanwhile by the infrared diagnostics module detect transformer connector whether failure, thus by described based on electric energy loss
Transformer turn-to-turn short circuit on-line monitoring system monitors whether transformer breaks down on-line jointly.
It can lead to every phase power loss after shorted-turn fault occurs for transformer to increase, and in the connector of bushing shell for transformer
The contact fault of junction also results in power loss increase.Power damage can be monitored by the data operation judgment module
Consumption, can diagnose the contact fault of the joint of bushing shell for transformer, by the infrared diagnostics module so as to realize
Transformer shorted-turn fault is further monitored from many aspects.Therefore, the transformer circle by described based on electric energy loss
Between short-circuit on-line monitoring system transformer shorted-turn fault can be monitored with high efficiency, and pass through the data operation judgment module
Can be detected from many aspects with the infrared diagnostics module, improve detection transformer shorted-turn fault convenience with
And accuracy.
Detailed description of the invention
Fig. 1 is that the theory structure of the transformer turn-to-turn short circuit on-line monitoring system provided by the present application based on electric energy loss shows
It is intended to；
Fig. 2 is the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss in one embodiment provided by the present application
Structural schematic diagram；
Fig. 3 is the flow chart of the transformer turn-to-turn short circuit on-line monitoring method provided by the present application based on electric energy loss.
Description of symbols
Transformer turn-to-turn short circuit on-line monitoring system 100, electric energy detection unit 10, data processing list based on electric energy loss
Member 20, data transmission unit 30, failure diagnosis unit 40, power equipment 110, detection module 120, signal pre-processing module 210,
Data acquisition module 220, data operation judgment module 410, infrared diagnostics module 420.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, by the following examples, and combine attached
Figure, is further elaborated the application.It should be appreciated that specific embodiment described herein is only to explain this Shen
Please, it is not used to limit the application.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).In the description of the present application, it is to be understood that term " on ", "lower", "front", "rear", " left side ",
The orientation of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " or position are closed
System indicates to be based on the orientation or positional relationship shown in the drawings, being merely for convenience of description the application and simplifying description
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the application.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Referring to Figure 1-2, the application provides a kind of transformer turn-to-turn short circuit on-line monitoring system 100 based on electric energy loss
Including electric energy detection unit 10, data processing unit 20, data transmission unit 30 and failure diagnosis unit 40.The electric energy inspection
Unit 10 is surveyed for acquiring electric parameter.The data processing unit 20 is electrically connected with the electric energy detection unit 10, and being used for will
The electric parameter is converted into digital signal, and is transmitted by data transmission unit 30 to the digital signal.The event
Barrier diagnosis unit 40 is used to receive the digital signal transmitted through the data transmission unit 30, and carries out fault diagnosis.Institute
Stating failure diagnosis unit 40 includes data operation judgment module 410 and infrared diagnostics module 420, the data operation judgment module
410 are electrically connected with the infrared diagnostics module 420, and the data operation judgment module 410 is transmitted for receiving through the data
The digital signal of the transmission of unit 30 simultaneously carries out operation judgement with fault threshold, and the infrared diagnostics module 420 is for detecting
Transformer joint fault.
The electric parameter is acquired by the electric energy detection unit 10, and the electric parameter is transmitted to the data
Processing unit 20.The electric parameter is converted into digital signal by the data processing unit 20, and is transmitted by the data
Unit 30 can be wirelessly transmitted to the failure diagnosis unit 40.The data operation judgment module 410 receives the number
Operation judgement is carried out with fault threshold after signal.Meanwhile by the infrared diagnostics module 420 detect transformer connector whether
Failure, to be become jointly to monitor on-line by described based on the transformer turn-to-turn short circuit on-line monitoring system 100 of electric energy loss
Whether depressor breaks down.
It can lead to every phase power loss after shorted-turn fault occurs for transformer to increase, and in the connector of bushing shell for transformer
The contact fault of junction also results in power loss increase.Power can be monitored by the data operation judgment module 410
Loss, the contact fault of the joint of bushing shell for transformer can be diagnosed by the infrared diagnostics module 420, so as to
It realizes from many aspects and further monitors transformer shorted-turn fault.Therefore, pass through the transformation based on electric energy loss
Device turn-to-turn short circuit on-line monitoring system 100 can monitor transformer shorted-turn fault with high efficiency, and pass through the data operation
Judgment module 410 can be detected from many aspects with the infrared diagnostics module 420, improve detection transformer turn-to-turn short circuit
The convenience and accuracy of failure.
In one embodiment, the electric energy detection unit 10 includes power equipment 110 and detection module 120.The inspection
It surveys module 120 to be electrically connected with the power equipment 110, to acquire the electric parameter of the power equipment 110.
The power equipment 110 is three-phase transformer, and the detection module 120 is used to acquire the input of three-phase transformer
The electric energy loss of end and output end, and collected electric energy loss information is transmitted at the data processing unit 20
Reason.Wherein, the detection module 120 includes power meter and infrared temperature probe.By power meter acquire three-phase transformer (A,
B, C three-phase transformer) input terminal and output end power, and calculate obtain three-phase transformer input terminal and output end electricity
It can loss.Meanwhile the temperature information of the joint of the casing of three-phase transformer is detected by infrared temperature probe, thus
To differentiate whether three-phase transformer has joint fault.
In one embodiment, the electric parameter is the power parameter and temperature parameter of the three-phase transformer, described
The power parameter of three-phase transformer includes the input power of the first phase transformer and the input work of output power, the second phase transformer
The input power and output power of rate and output power and third phase transformer, the temperature parameter of the three-phase transformer include
The third of first connector temperature of the first phase transformer, the second connector temperature of the second phase transformer and third phase transformer connects
Head temperature.
Wherein, first phase transformer is the A phase transformer in three-phase transformer, and second phase transformer is three-phase
B phase transformer in transformer, the third phase transformer are the C phase transformer in three-phase transformer.Pass through first phase
The input power of transformer is defeated with output power, the input power of second phase transformer and the third phase transformer
Enter power and output power, unloaded total losses, the first phase electric energy loss, the second phase electric energy loss of three-phase transformer can be calculated
And third phase electric energy loss.Wherein, the first phase electric energy loss is the no-load loss of A phase transformer, the two phase electricity
It can be lost as the no-load loss of B phase transformer, the third phase electric energy loss is the no-load loss of C phase transformer.Described first
Connector temperature is the temperature of the joint of the casing of A phase transformer, and second connector temperature is the casing of B phase transformer
Joint temperature, the third connector temperature be C phase transformer casing joint temperature.
By the input terminal of power meter acquisition three-phase transformer (A, B, C three-phase transformer) and the power of output end, and count
Calculate the electric energy loss for obtaining the input terminal and output end of three-phase transformer.Meanwhile three phase transformations are detected by infrared temperature probe
The temperature information of the joint of the casing of depressor, thus to differentiate whether three-phase transformer has joint fault.Therefore, pass through
The transformer turn-to-turn short circuit on-line monitoring system 100 based on electric energy loss can be efficient, contactless differentiation transformer function
Whether abnormal rate loss is joint fault, so that transformer fault detection is more comprehensive, can distinguish turn-to-turn short circuit and joint fault.
In one embodiment, the infrared diagnostics module 420 includes the first phase infrared diagnostics module, second mutually infrared examines
Disconnected module and third phase infrared diagnostics module.The first phase infrared diagnostics module is electrically connected with the data operation judgment module
Connect, to detect the first phase transformer connector whether failure.The second phase infrared diagnostics module and the data operation judge
Module electrical connection, to detect the second phase transformer connector whether failure.The third phase infrared diagnostics module and the data
Operation judgment module electrical connection, to detect third phase transformer connector whether failure.
By the first phase infrared diagnostics module, the second phase infrared diagnostics module and the third phase is infrared examines
Disconnected module can judge the temperature of the joint of the casing of A, B, C three-phase transformer and the temperature threshold of setting respectively, with
This come differentiate be which phase transformer connector whether failure.Meanwhile passing through the first phase infrared diagnostics module, described second
Phase infrared diagnostics module and the third phase infrared diagnostics module can individually detect the connector of A, B, C three-phase transformer
Whether failure, be independent of each other each other, so that the transformer turn-to-turn short circuit on-line monitoring system 100 based on electric energy loss
Whether differentiation transformer efficiency loss exception that can be efficient, contactless is joint fault, so that transformer fault detection is more
Comprehensively, turn-to-turn short circuit and joint fault can be distinguished, and distinguishes the case where each phase transformer breaks down.
In one embodiment, the data processing unit 20 includes signal pre-processing module 210 and data acquisition module
220.The signal pre-processing module 210 is electrically connected with the detection module 120, for the electric parameter to be converted into number
Signal.The data acquisition module 220 is electrically connected with the signal pre-processing module 210, to obtain the digital signal, and
By the data transmission unit 30 by the digital data transmission to the failure diagnosis unit 40.
The electric parameter is converted into digital signal by the signal pre-processing module 210, by processing such as filtering conversions
The digital signal can be wirelessly transmitted to the failure diagnosis unit 40 by the data transmission unit 30 later.It is described
Data operation judgment module 410 compares the total losses of three-phase transformer with fault threshold, if total losses are less than failure threshold
Value then exports " normal " signal, if total losses are greater than fault threshold, to the loss of each phase and the fault threshold of each phase into
Row comparison.If detecting, the loss of first phase transformer (A phase transformer) is greater than fault threshold, starts described infrared examine
The first phase infrared diagnostics module (A phase infrared diagnostics module) in disconnected module 420, to detect first phase transformer
(A phase transformer) whether there is joint fault.
" transformer A phase joint fault " is exported if A phase transformer is there are joint fault, if there is no connect A phase transformer
Head failure, then export " transformer A phase shorted-turn fault ".And so on, for second phase transformer (B phase transformer)
And third phase transformer (C phase transformer) also can similarly be judged.So passing through the data operation judgment module
410 with the infrared diagnostics module 420 can be efficient, contactless the loss of differentiation transformer efficiency it is abnormal whether be connector therefore
Barrier can distinguish turn-to-turn short circuit and joint fault so that transformer fault detection is more comprehensive.
Fig. 3 is referred to, in one embodiment, a kind of transformer turn-to-turn short circuit on-line monitoring method based on electric energy loss
Include:
The total threshold value of electric energy loss, the first electric energy loss threshold value, the second electric energy loss threshold value of three-phase transformer is arranged in S10
And third electric energy loss threshold value, and the first temperature threshold, second temperature threshold value and the third temperature of three-phase transformer are set
Threshold value；
S20, the power parameter and temperature parameter of three-phase transformer described in online acquisition；
The power parameter and the temperature parameter are filtered conversion, the function after obtaining data prediction by S30
Rate parameter and the temperature parameter；
S40 calculates the three-phase transformer with the temperature parameter according to the power parameter after data prediction
Electric energy total losses；
S50, if the electric energy total losses are less than the total threshold value of the electric energy loss, again three phase-change pressures described in online acquisition
The power parameter and temperature parameter of device calculate the first phase electricity if the electric energy total losses are greater than the total threshold value of the electric energy loss
It can loss, the second phase electric energy loss and third phase electric energy loss；
S60, according to the first phase electric energy loss, the second phase electric energy loss and the third phase electric energy loss,
If the first phase electric energy loss is greater than the first electric energy loss threshold value, the first phase transformer breaks down, if described the
Two-phase electric energy loss is greater than the second electric energy loss threshold value, then the second phase transformer breaks down, if the third phase electric energy
Loss is greater than the third electric energy loss threshold value, then third phase transformer breaks down；
S70, according to the fault condition of first phase transformer, the fault condition of second phase transformer and described
The fault condition of third phase transformer carries out fault severity level analysis, and exports diagnostic result.
In the step S20, by the electric energy detection unit 10 acquire the power parameter of the three-phase transformer with
Temperature parameter.In the step S30, by the data processing unit 20 to the power parameter and the temperature parameter into
Row filtering conversion, the power parameter and the temperature parameter after obtaining data prediction.Three phase transformations are acquired by power meter
The input terminal of depressor (A, B, C three-phase transformer) and the power of output end, and calculate and obtain the input terminal of three-phase transformer and defeated
The electric energy loss of outlet.By the input power of first phase transformer and output power, second phase transformer it is defeated
The input power and output power for entering power and the third phase transformer can calculate the total damage of zero load of three-phase transformer
Consumption, the first phase electric energy loss, the second phase electric energy loss and third phase electric energy loss.If the electric energy total losses of three-phase transformer are small
In the total threshold value of the electric energy loss, then exporting diagnostic result is " normal " signal.If the electric energy total losses of three-phase transformer are greater than
The total threshold value of electric energy loss can then compare the loss of each phase and the fault threshold of each phase.
In the step S60, if the first phase electric energy loss (electric energy loss of A phase) is greater than first electric energy loss
Threshold value, then first phase transformer breaks down, if the first phase electric energy loss (electric energy loss of A phase) is less than described first
Electric energy loss threshold value, then the first phase transformer output diagnostic result is " normal " signal.If the second phase electric energy loss
((electric energy loss of B phase)) is greater than the second electric energy loss threshold value, then the second phase transformer breaks down, if the two phase electricity
(electric energy loss of B phase) can be lost and be less than the second electric energy loss threshold value, then the second phase electric energy loss exports diagnostic result
For " normal " signal.If the third phase electric energy loss (electric energy loss of C phase) is greater than the third electric energy loss threshold value, third
Phase transformer breaks down, if the third phase electric energy loss (electric energy loss of C phase) is less than the third electric energy loss threshold value,
The third phase electric energy loss output diagnostic result is " normal " signal.
Using the method for monitoring electric energy loss, i.e., accumulated time is carried out to power loss, to reflect slight turn-to-turn short circuit event
Barrier.Meanwhile other than turn-to-turn short circuit can lead to every phase power loss increase, in the contact event of the joint of bushing shell for transformer
Barrier also results in power loss increase, therefore, can be by increasing infrared measurement of temperature in order to differentiate specific transformer fault position
Probe, detect the temperature of the joint of the casing of transformer differentiate transformer whether joint fault.
In one embodiment, the step S60 includes:
S611 starts first and mutually infrared examines if the first phase electric energy loss is greater than the first electric energy loss threshold value
Disconnected module；
S612, according to the first phase infrared diagnostics module, if the first connector temperature of first phase transformer is greater than
First temperature threshold, then the connector of first phase transformer breaks down, otherwise the turn-to-turn of first phase transformer
Short circuit.
If the first phase electric energy loss (electric energy loss of A phase) is greater than the first electric energy loss threshold value, start first
Phase infrared diagnostics module (A phase infrared diagnostics module).If the first connector temperature of first phase transformer is greater than described first
Temperature threshold, then the connector of first phase transformer (A phase transformer) breaks down, then exporting result is that " A phase transformer connects
Head failure ".If joint fault is not present in first phase transformer (A phase transformer), exporting result is " A phase transformer circle
Between short trouble ".
In one embodiment, the step S60 further include:
S621 starts second and mutually infrared examines if the second phase electric energy loss is greater than the second electric energy loss threshold value
Disconnected module；
S622, according to the second phase infrared diagnostics module, if the second connector temperature of second phase transformer is greater than
The second temperature threshold value, then the connector of second phase transformer breaks down, otherwise the turn-to-turn of second phase transformer
Short circuit.
If the second phase electric energy loss (electric energy loss of B phase) is greater than the second electric energy loss threshold value, start second
Phase infrared diagnostics module (B phase infrared diagnostics module).If the second connector temperature of second phase transformer is greater than described second
Temperature threshold, then the connector of second phase transformer (B phase transformer) breaks down, then exporting result is that " B phase transformer connects
Head failure ".If joint fault is not present in second phase transformer (B phase transformer), exporting result is " B phase transformer circle
Between short trouble ".
In one embodiment, the step S60 further include:
S631, if the third phase electric energy loss greater than the third electric energy loss threshold value, starts, third phase is infrared to be examined
Disconnected module；
S632, according to the third phase infrared diagnostics module, if the third connector temperature of the third phase transformer is greater than
The third temperature threshold, then the connector of the third phase transformer breaks down, otherwise the turn-to-turn of the third phase transformer
Short circuit.
If the third phase electric energy loss (electric energy loss of C phase) is greater than the third electric energy loss threshold value, start third
Phase infrared diagnostics module (C phase infrared diagnostics module).If the third connector temperature of the third phase transformer is greater than the third
Temperature threshold, then the connector of the third phase transformer (C phase transformer) breaks down, then exporting result is that " C phase transformer connects
Head failure ".If joint fault is not present in the third phase transformer (C phase transformer), exporting result is " C phase transformer circle
Between short trouble ".
It can be efficient, contactless by the transformer turn-to-turn short circuit on-line monitoring system 100 based on electric energy loss
Differentiate whether transformer efficiency loss exception is joint fault, so that transformer fault detection is more comprehensive, it is short can to distinguish turn-to-turn
Road and joint fault.It can be right by the transformer turn-to-turn short circuit on-line monitoring system 100 based on electric energy loss and method
Distribution transformer turn-to-turn short circuit failure carries out real time on-line monitoring, can find failure in time and by fault-signal in failure early stage
It is uploaded to control centre, avoids that interruption of service occurs, extends the actual life of transformer, improve power supply reliability.Pass through
The accumulation of power loss increment can be prevented failure from further developing, be found that in early days with the shorted-turn fault at early warning initial stage
Failure is simultaneously uploaded to control centre and removes failure to take measures, and has far-reaching shadow to the power supply reliability for improving power supply unit
It rings.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application the scope of the patents therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the concept of this application, various modifications and improvements can be made, these belong to the guarantor of the application
Protect range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss characterized by comprising
Electric energy detection unit (10), for acquiring electric parameter；
Data processing unit (20) is electrically connected, for the electric parameter to be converted into counting with the electric energy detection unit (10)
Word signal, and the digital signal is transmitted by data transmission unit (30)；
Failure diagnosis unit (40) for receiving the digital signal transmitted through the data transmission unit (30), and carries out
Fault diagnosis；
The failure diagnosis unit (40) includes data operation judgment module (410) and infrared diagnostics module (420), the data
Operation judgment module (410) is electrically connected with the infrared diagnostics module (420), and the data operation judgment module (410) is used for
It receives the digital signal transmitted through the data transmission unit (30) and carries out operation judgement with fault threshold, it is described infrared
Diagnostic module (420) is for detecting transformer joint fault.
2. the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss as described in claim 1, which is characterized in that institute
Stating electric energy detection unit (10) includes:
Power equipment (110)；
Detection module (120) is electrically connected with the power equipment (110), to acquire the electrical ginseng of the power equipment (110)
Number.
3. the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss as claimed in claim 2, which is characterized in that institute
Stating power equipment (110) is three-phase transformer.
4. the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss as claimed in claim 3, which is characterized in that institute
Stating infrared diagnostics module (420) includes:
First phase infrared diagnostics module, is electrically connected with the data operation judgment module, to detect the first phase transformer connector
Whether failure；
Second phase infrared diagnostics module, is electrically connected with the data operation judgment module, to detect the second phase transformer connector
Whether failure；
Third phase infrared diagnostics module is electrically connected with the data operation judgment module, to detect third phase transformer connector
Whether failure.
5. the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss as claimed in claim 3, which is characterized in that institute
State the power parameter and temperature parameter that electric parameter is the three-phase transformer, the power parameter of the three-phase transformer includes the
The input power and output power, the input power of the second phase transformer and output power and third phase-change pressure of one phase transformer
The input power and output power of device, the temperature parameter of the three-phase transformer include the first connector temperature of the first phase transformer
The third connector temperature of degree, the second connector temperature of the second phase transformer and third phase transformer.
6. the transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss as claimed in claim 2, which is characterized in that institute
Stating data processing unit (20) includes:
Signal pre-processing module (210) is electrically connected with the detection module (120), for the electric parameter to be converted into counting
Word signal；
Data acquisition module (220) is electrically connected with the signal pre-processing module (210), to obtain the digital signal, and
By the data transmission unit (30) by the digital data transmission to the failure diagnosis unit (40).
7. a kind of transformer turn-to-turn short circuit on-line monitoring method based on electric energy loss characterized by comprising
S10, be arranged the total threshold value of electric energy loss of three-phase transformer, the first electric energy loss threshold value, the second electric energy loss threshold value and
Third electric energy loss threshold value, and the first temperature threshold, second temperature threshold value and the third temperature threshold of three-phase transformer are set；
S20, the power parameter and temperature parameter of three-phase transformer described in online acquisition；
The power parameter and the temperature parameter are filtered conversion by S30, the power ginseng after obtaining data prediction
The several and temperature parameter；
S40 calculates the electric energy of the three-phase transformer according to the power parameter after data prediction with the temperature parameter
Total losses；
S50, if the electric energy total losses are less than the electric energy loss total threshold value, three-phase transformer described in online acquisition again
Power parameter and temperature parameter calculate the first phase electric energy damage if the electric energy total losses are greater than the total threshold value of the electric energy loss
Consumption, the second phase electric energy loss and third phase electric energy loss；
S60, according to the first phase electric energy loss, the second phase electric energy loss and the third phase electric energy loss, if institute
The first phase electric energy loss is stated greater than the first electric energy loss threshold value, then the first phase transformer breaks down, if second phase
Electric energy loss is greater than the second electric energy loss threshold value, then the second phase transformer breaks down, if the third phase electric energy loss
Greater than the third electric energy loss threshold value, then third phase transformer breaks down；
S70, according to the fault condition of first phase transformer, the fault condition and the third of second phase transformer
The fault condition of phase transformer carries out fault severity level analysis, and exports diagnostic result.
8. the transformer turn-to-turn short circuit on-line monitoring method based on electric energy loss as claimed in claim 7, which is characterized in that institute
Stating step S60 includes:
S611 starts the first phase infrared diagnostics mould if the first phase electric energy loss is greater than the first electric energy loss threshold value
Block；
S612, according to the first phase infrared diagnostics module, if the first connector temperature of first phase transformer is greater than described
First temperature threshold, then the connector of first phase transformer breaks down, otherwise the turn-to-turn short circuit of first phase transformer.
9. the transformer turn-to-turn short circuit on-line monitoring method based on electric energy loss as claimed in claim 7, which is characterized in that institute
State step S60 further include:
S621 starts the second phase infrared diagnostics mould if the second phase electric energy loss is greater than the second electric energy loss threshold value
Block；
S622, according to the second phase infrared diagnostics module, if the second connector temperature of second phase transformer is greater than described
Second temperature threshold value, then the connector of second phase transformer breaks down, otherwise the turn-to-turn short circuit of second phase transformer.
10. the transformer turn-to-turn short circuit on-line monitoring method based on electric energy loss as claimed in claim 7, which is characterized in that
The step S60 further include:
S631 starts third phase infrared diagnostics mould if the third phase electric energy loss is greater than the third electric energy loss threshold value
Block；
S632, according to the third phase infrared diagnostics module, if the third connector temperature of the third phase transformer is greater than described
Third temperature threshold, then the connector of the third phase transformer breaks down, otherwise the turn-to-turn short circuit of the third phase transformer.
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| CN201811399605.7A CN109324255A (en) | 2018-11-22 | 2018-11-22 | Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss |
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| CN201811399605.7A CN109324255A (en) | 2018-11-22 | 2018-11-22 | Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss |
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