CN205861786U - Winding in Power Transformer thrust characteristic diagnostic system - Google Patents
Winding in Power Transformer thrust characteristic diagnostic system Download PDFInfo
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- CN205861786U CN205861786U CN201620553436.8U CN201620553436U CN205861786U CN 205861786 U CN205861786 U CN 205861786U CN 201620553436 U CN201620553436 U CN 201620553436U CN 205861786 U CN205861786 U CN 205861786U
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- 238000004804 winding Methods 0.000 title claims abstract description 33
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 8
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- 230000036541 health Effects 0.000 claims description 3
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- 238000001514 detection method Methods 0.000 abstract description 4
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- 238000010586 diagram Methods 0.000 description 5
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- 238000010183 spectrum analysis Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 2
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- 238000005070 sampling Methods 0.000 description 2
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Abstract
This utility model belongs to diagnosing fault of power transformer technical field, particularly relates to a kind of Winding in Power Transformer thrust characteristic diagnostic system.This utility model includes voltage sensor, also includes signal condition and amplifying unit, A/D conversion control circuit, signal analysis and diagnostic system；Described voltage signal connects the input of signal condition and amplifying unit through overvoltage sensor, signal condition is connected the input of A/D conversion control circuit with the outfan of amplifying unit, and the outfan of A/D conversion control circuit is connected with the input of diagnostic system with signal analysis；PC or embedded ARM processor are connected with USB power source and display output module respectively, and USB power source is connected with diagnostic system with signal analysis respectively with display output module.This utility model simple in construction, reasonable in design, it is possible to the subtle flow detection that Transformer Winding occurs is sensitiveer, accurate, it is to avoid the equipment fault that the accumulative effect of winding deformation causes.
Description
Technical field
This utility model belongs to diagnosing fault of power transformer technical field, particularly relates to a kind of Winding in Power Transformer pressure
Clamp force characteristic diagnostic system.
Background technology
Transformator is one of equipment of most critical in power system, and it carries voltage transformation, electric energy distribution and transmission, and
Electrical power services is provided.Therefore, transformator properly functioning is to power system security, reliable, high-quality, the important guarantor of economical operation
Card, it is necessary to prevent and reduce the generation of transformer fault and accident to greatest extent.When power transformer suffers short-circuit impact etc.
After External Force Acting, Winding in Power Transformer thrust can reduce, thus causes the winding of transformator to occur to loosen, resisting of transformator
Short-circuit capacity also can weaken, and defines vicious cycle, and the properly functioning of transformator in serious threat.Traditional Transformer Winding becomes
Shape detection method mainly has method of frequency response method (FRA), short circuit impedance method, Low Voltage Impulse Method.Use Frequency Response Analysis method test transformator around
Group deformation is accepted extensively by power department, but how on earth uses FRA method to carry out the deformation extent of Transformer Winding point
Analysis there is no unified quantitative analysis standard.
In order to solve the deficiency of existing detection method based on electrical model, part researcher is theoretically to the change set up
Depressor winding mathematical model is studied, and demonstrates the pass between the natural frequency of winding and winding thrust from test
System.By transformer induction voltage signal is carried out spectrum analysis, obtain the change of winding natural frequency, whether judge winding
There is the faults such as thrust reduction, winding deformation.
Summary of the invention
In place of above-mentioned the deficiencies in the prior art, this utility model provides a kind of Winding in Power Transformer to compress
Force characteristic diagnostic system.Its object is to this system and can judge Transformer Winding pressure according to the induced voltage signal detected
The measuring phase of clamp force.
In order to realize foregoing invention purpose, this utility model is achieved through the following technical solutions:
Winding in Power Transformer thrust characteristic diagnostic system, including voltage sensor, also includes signal condition and amplification
Unit, A/D conversion control circuit, signal analysis and diagnostic system；Described voltage signal connects signal through overvoltage sensor and adjusts
Reason and the input of amplifying unit, signal condition is connected the input of A/D conversion control circuit, A/ with the outfan of amplifying unit
The outfan of D conversion control circuit is connected with the input of diagnostic system with signal analysis；PC or embedded ARM processor
Respectively with USB power source and display output module be connected, USB power source and display output module respectively with signal analysis with diagnosis system
System is connected.
Described voltage signal cable has shielding material；Described signal analysis and diagnostic system use PC or embedded
ARM controller；The power supply of described system is provided by USB, it is not necessary to external power supply.
Described voltage signal is converted to the voltage signal of coincidence measurement rule through voltage transformer, and this voltage signal is passed
Being passed to the input of signal condition and amplifying unit, the voltage signal after nursing one's health and amplifying is sent to A/D conversion control circuit,
Being converted to represent the digital signal of voltage, this digital signal draws analysis and the diagnosis of system by signal analysis and diagnostic system
As a result, the thrust characteristic of tested transformator is i.e. drawn.
Described signal condition and amplifying unit include pre-amplification circuit, filter circuit, main amplifying circuit, preposition amplification
The outfan of circuit is connected with the input of filter circuit, and the outfan of filter circuit is connected with the outfan of main amplifying circuit,
Signal condition and amplifying unit by measurement to voltage signal carry out respective handling and be sent to A/D conversion control circuit.
Described filter circuit is low-pass filter circuit.
Described pre-amplification circuit includes operational amplifier U1C, the first resistance R1, the second resistance R2, pre-amplification circuit
Input anode be connected with the output of sensor CON2, the input cathode of preamplifier is connect by the first resistance R1
Ground, and be connected with second resistance R2 one end；Second resistance R2 other end is connected with preamplifier outfan.
Described filter circuit is low-pass filter circuit, including the 3rd resistance R3 and the first electric capacity C1, the one of the 3rd resistance R3
End is connected with pre-amplification circuit outfan, and the other end of the 3rd resistance R3 passes through the first electric capacity C1 ground connection.
Described main amplifying circuit includes operational amplifier U1B, the 4th resistance R4, the 5th resistance R5 and the second electric capacity C2, main
Amplifier in positive pole is connected with low-pass filter circuit outfan, and main amplifier input negative pole is connect by the 4th resistance R4
Ground, and one end with the 5th resistance R5, the second electric capacity C2 is connected respectively, the other end company of the 5th resistance R5 and the second electric capacity C2
It is connected with main amplifying circuit outfan after connecing.
Described AD conversion control unit has sampling holding effect, finally exports transformation result, and output signal is numeral letter
Number.
This utility model technology relatively now has the advantage that and beneficial effect:
This utility model simple in construction, reasonable in design, by the induced voltage of transformator is carried out spectrum analysis, determine change
The fixed frequency of depressor winding, thus obtain the thrust characteristic of tested transformator, it is not necessary to the structure of transformator is changed
Make.The detection of subtle flow that Transformer Winding is occurred by this utility model is sensitiveer, accurate, it is to avoid the accumulation of winding deformation
The equipment fault that effect causes.The compression degree of transformator winding can be carried out accurate evaluation, preferably grasp transformator
Insulation ag(e)ing situation.Also transformator thrust can be carried out the tracking measurement of different times and realize the right of different times data
Than analyzing.
Below in conjunction with the accompanying drawings and specific embodiment, the technical solution of the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is this utility model system architecture diagram；
Fig. 2 is signal condition described in the utility model and amplifying unit circuit diagram；
Fig. 3 is this utility model AD conversion control circuit circuit diagram.
Detailed description of the invention
As it is shown in figure 1, Fig. 1 is system architecture diagram of the present utility model.Winding in Power Transformer thrust characteristic diagnoses
System, including voltage sensor, signal condition and amplifying unit, A/D conversion control circuit, signal analysis and diagnostic system.Institute
State the outfan that voltage signal passes through overvoltage sensor and connect the input of signal condition and amplifying unit, signal condition with put
The outfan of big unit connects the input of A/D conversion control circuit, the outfan of A/D conversion control circuit and signal analysis with
The input of diagnostic system is connected.PC or embedded ARM processor are connected with USB power source and display output module respectively
Connecing, USB power source is connected with diagnostic system with signal analysis respectively with display output module.
Described voltage signal cable has shielding material, and capacity of resisting disturbance is strong.Described signal analysis uses with diagnostic system
PC or embedded-type ARM controller.The power supply of described system is provided by USB, it is not necessary to external power supply.
Described voltage signal is converted to the voltage signal of coincidence measurement rule, this voltage signal quilt through voltage transformer
Being transferred to the input of signal condition and amplifying unit, the voltage signal after nursing one's health and amplifying is sent to A/D conversion and control electricity
Road, is converted to represent the digital signal of voltage, this digital signal by signal analysis and diagnostic system draw the analysis of system with
Diagnostic result, i.e. draws the thrust characteristic of tested transformator.
In the embodiment depicted in figure 2, signal condition and amplifying unit include that pre-amplification circuit, filter circuit, master are put
Big circuit.The outfan of pre-amplification circuit is connected with the input of filter circuit, the outfan of filter circuit and main amplification electricity
The outfan on road is connected, signal condition and amplifying unit by measurement to voltage signal carry out respective handling and be sent to A/D and change
Control circuit.
Fig. 2 is signal condition and amplifying unit circuit diagram, including pre-amplification circuit, low-pass filter circuit, main amplification electricity
Road.Wherein pre-amplification circuit includes operational amplifier U1C, the first resistance R1 and the second resistance R2, pre-amplification circuit defeated
Entering proper pole to be connected with the output of sensor CON2, the input cathode of preamplifier passes through the first resistance R1 ground connection,
And be connected with second resistance R2 one end, the second resistance R2 other end is connected with preamplifier outfan.
Described filter circuit is low-pass filter circuit, including the 3rd resistance R3 and the first electric capacity C1, the one of the 3rd resistance R3
End is connected with pre-amplification circuit outfan, and the other end of the 3rd resistance R3 passes through the first electric capacity C1 ground connection.
Described main amplifying circuit includes operational amplifier U1B, the 4th resistance R4, the 5th resistance R5 and the second electric capacity C2, main
Amplifier in positive pole is connected with low-pass filter circuit outfan, and main amplifier input negative pole is connect by the 4th resistance R4
Ground, and one end with the 5th resistance R5, the second electric capacity C2 is connected respectively, the other end company of the 5th resistance R5 and the second electric capacity C2
It is connected with main amplifying circuit outfan after connecing.
In the embodiment shown in fig. 3, A/D conversion control circuit contains sampling and keeps function, and input signal is analogue signal,
Output signal is digital signal.
Operation principle of the present utility model is:
The induced voltage of power transformer is converted to the voltage signal that coincidence measurement requires, this voltage by voltage sensor
Signal is transferred to signal condition and amplifying unit, and voltage signal is amplified by signal condition and amplifying unit, Filtering Processing,
Output signal is transferred to A/D conversion control circuit, and this A/D conversion control circuit is the analog-digital converter of 12 precision, and A/D turns
Change control circuit and voltage signal can be converted to the digital signal of 12 precision, this digital signal be transferred to signal analysis with
Diagnostic system, data signal is analyzed by signal analysis with diagnostic system, available transformer voltage signal Spectrum Analysis
Curve, and determine Transformer Winding thrust situation according to spectrum analysis curve, additionally different curves can be compared
Analyze.
Claims (8)
1. Winding in Power Transformer thrust characteristic diagnostic system, including voltage sensor, is characterized in that: also include signal condition
With amplifying unit, A/D conversion control circuit, signal analysis and diagnostic system；Described voltage signal connects through overvoltage sensor
Signal condition and the input of amplifying unit, signal condition is connected the defeated of A/D conversion control circuit with the outfan of amplifying unit
Entering end, the outfan of A/D conversion control circuit is connected with the input of diagnostic system with signal analysis；PC or embedded
Arm processor is connected with USB power source and display output module respectively, and USB power source and display output module divide with signal respectively
Analysis is connected with diagnostic system.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 1, is characterized in that: described voltage is believed
Number cable has shielding material；Described signal analysis uses PC or embedded-type ARM controller with diagnostic system；Described system
Power supply provided by USB, it is not necessary to external power supply.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 1, is characterized in that: described voltage is believed
Number through voltage transformer be converted to coincidence measurement rule voltage signal, this voltage signal is transferred to signal condition and amplification
The input of unit, the voltage signal after nursing one's health and amplifying is sent to A/D conversion control circuit, is converted to represent the number of voltage
Word signal, this digital signal draws analysis and the diagnostic result of system by signal analysis and diagnostic system, i.e. draws tested change
The thrust characteristic of depressor.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 1, is characterized in that: described signal is adjusted
Reason and amplifying unit include pre-amplification circuit, filter circuit, main amplifying circuit, the outfan of pre-amplification circuit and filtering
The input of circuit is connected, and the outfan of filter circuit is connected with the outfan of main amplifying circuit, signal condition and amplifying unit
By measurement to voltage signal carry out respective handling and be sent to A/D conversion control circuit.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 4, is characterized in that: described filtered electrical
Road is low-pass filter circuit.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 4, is characterized in that: put before described
Big circuit includes operational amplifier U1C, the first resistance R1, the second resistance R2, the input anode of pre-amplification circuit and sensing
The output of device CON2 be connected, the input cathode of preamplifier pass through the first resistance R1 ground connection, and with the second resistance R2
One end is connected；Second resistance R2 other end is connected with preamplifier outfan.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 4, is characterized in that: described filtered electrical
Road is low-pass filter circuit, and including the 3rd resistance R3 and the first electric capacity C1, one end of the 3rd resistance R3 is defeated with pre-amplification circuit
Going out end to connect, the other end of the 3rd resistance R3 passes through the first electric capacity C1 ground connection.
Winding in Power Transformer thrust characteristic diagnostic system the most according to claim 4, is characterized in that: described main amplification
Circuit includes operational amplifier U1B, the 4th resistance R4, the 5th resistance R5 and the second electric capacity C2, main amplifier input positive pole with
Low-pass filter circuit outfan be connected, main amplifier input negative pole pass through the 4th resistance R4 ground connection, and respectively with the 5th resistance
R5, one end of the second electric capacity C2 are connected, and the other end of the 5th resistance R5 and the second electric capacity C2 is defeated with main amplifying circuit after connecting
Go out end to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553436.8U CN205861786U (en) | 2016-06-08 | 2016-06-08 | Winding in Power Transformer thrust characteristic diagnostic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553436.8U CN205861786U (en) | 2016-06-08 | 2016-06-08 | Winding in Power Transformer thrust characteristic diagnostic system |
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| CN205861786U true CN205861786U (en) | 2017-01-04 |
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| CN201620553436.8U Active CN205861786U (en) | 2016-06-08 | 2016-06-08 | Winding in Power Transformer thrust characteristic diagnostic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823951A (en) * | 2016-06-08 | 2016-08-03 | 国网辽宁省电力有限公司电力科学研究院 | Pressing force characteristic diagnostic system of power transformer winding |
-
2016
- 2016-06-08 CN CN201620553436.8U patent/CN205861786U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823951A (en) * | 2016-06-08 | 2016-08-03 | 国网辽宁省电力有限公司电力科学研究院 | Pressing force characteristic diagnostic system of power transformer winding |
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