CN206657074U - A kind of signal synchronizer for deformation of transformer winding on-line monitoring - Google Patents
A kind of signal synchronizer for deformation of transformer winding on-line monitoring Download PDFInfo
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- CN206657074U CN206657074U CN201720292274.1U CN201720292274U CN206657074U CN 206657074 U CN206657074 U CN 206657074U CN 201720292274 U CN201720292274 U CN 201720292274U CN 206657074 U CN206657074 U CN 206657074U
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- 238000004804 winding Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 16
- 230000001360 synchronised effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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Abstract
It the utility model is related to field of power, a kind of signal synchronizer for deformation of transformer winding on-line monitoring is especially provided, including 220V AC powers, decay isolation circuit, sample circuit, amplifying circuit and the filter circuit being sequentially connected, the filter circuit connection A/D sample circuits or shaping circuit.The utility model directly obtains source of synchronising signal by 220V supply lines, it is not necessary to which extra field wiring, easy-to-use, synchronous effect is good.The synchronizer passes through the trigger signal that decays, sample, amplify, filter, gather 220V AC signals, the 50HZ stablized or so, there is provided all signal acquisition modules and data processing module to winding deformation on-line monitoring system.All modules all use same 220V AC powers, and the phase of the synchronizing signal collected is all consistent.
Description
Technical field
Field of power is the utility model is related to, a kind of letter for deformation of transformer winding on-line monitoring is especially provided
Number synchronizer.
Background technology
In the various equipment of power system, transformer is that costly and important equipment, its safe operation is for protecting
It is significant to demonstrate,prove power grid security reliability service.Accident analysis table about transformer, winding be break down more part it
One.China 220kV in 1997 and above transformer unplanned outage are shown by the classification situation at position:220kV grade transformers
In the unplanned outage time caused by coil account for 79.49%, the 330kV grades of total unplanned outage time and be then
72.31%, 500kV grade are then 98.92%.
Because design of transformer structure does not reach the short-circuit capacity that bears of national regulations, and power system short circuit capacity adds
Greatly, make transformer winding after short-circuit impact is born that mechanical distortions occur, and cumulative effect can be such that deformation further develops, i.e.,
Make do not occur system short-circuit accident, it is improper out of service to also result in transformer.Correct deformation detection can guarantee that in real time
Transformer fault element is timely replaced, and fault element is used to greatest extent, so as to extend the use of transformer
Life-span.Theory and practice all illustrates that measurement short-circuit reactance is a kind of effective ways for judging deformation of transformer winding.
, it is necessary to gather the high pressure of transformer, middle pressure, low pressure this A phase at three, B in the monitoring of deformation of transformer winding
Phase, the voltage and current signal of C phases data syn-chronization can just be calculated accurately around class value, it is necessary to handle the data collected.
In the off-line monitoring equipment of the deformation of transformer winding based on impedance method, exist for data acquisition circuit and data processing circuit
Among a set of equipment, the situation of module is not separated by, the triggering of signal acquisition is all that CPU is controlled, it is not necessary to add outside touch
Signal.For the on-line monitoring system of deformation of transformer winding, if data acquisition and data processing are the systems of sub-module,
Require synchronous acquisition signal and just can guarantee that each voltage, current module can gather simultaneously.In the prior art, system makes
The synchronism of data is judged with timestamp, acquisition is issued to acquisition module by data processing module, acquisition module leads to
Cross identical sample rate to be sampled, the data collected then added into temporal information, are then uploaded to data processing module,
Data processing module is calculated around resistance by processing.Existing scheme existence time postpones, and there is larger mistake the time of signal acquisition
Difference, to calculating the phase of data and considerable influence being present around class value.
Utility model content
The purpose of this utility model is：Prolong for the prior art existing Transformer Winding monitoring signals synchronization scenario time
It is longer late, and then the problem of influence winding monitoring result precision, there is provided one kind is based on 220V AC voltage as source of synchronising signal
Be used for deformation of transformer winding on-line monitoring signal synchronizer.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of signal synchronizer for deformation of transformer winding on-line monitoring, including the 220V alternating currents being sequentially connected
Source, decay isolation circuit, sample circuit, amplifying circuit and filter circuit, the filter circuit connect A/D sample circuits or whole
Shape circuit.
The each signal acquisition module and data processing mould of the synchronizer connection deformation of transformer winding monitoring system
Block, provide it synchronizing signal.
Further, the decay isolation circuit includes voltage transformer, and described after the 220V power series resistance
The isolation circuit that decays connection, described decay connect the sample circuit to power circuit.
Further, the voltage transformer input and output electric current ratio is 1:1.
As preferred embodiment, the voltage transformer uses TV31B02.TV31B02 serves isolation voltage
Effect, 220V AC voltage are sealed in after resistance, and current control is within 2mA, because TV31B02 input and output are than being 1:
1, input current is up to 2mA, and output current maximum is also 2mA, then outputs current to the sample circuit.
Further, the sample circuit uses OP2227, and the sample circuit sample resistance is between 500 Ω~1000
Ω。
The electric current of TV31B02 outputs is sampled by OP2227, current signal is converted into voltage signal.Sample resistance size
For 1000.Obtained voltage signal is less than 2V.
Further, the filter circuit uses two rank low pass filters.The filter circuit filters out the high frequency in signal
Clutter, the signal for retaining original 50HZ.
As specific embodiment, the wave filter uses OP2227.
As preferred embodiment, the A/D Acquisition Circuits possess the high precision collecting passage on 16,6 tunnel, will filter
Later synchronous signal acquisition is sent to CPU processing after coming out.
As a kind of specific embodiment, the A/D sample circuits use ADS8556.
As another embodiment, the shaping circuit is multistage shaping circuit.
As preferred embodiment, the shaping circuit uses 74HC14.It is real that 74HC14 is based on 6 tunnel Schmitt triggers
Existing multiple signal shaping, is square-wave signal by original alternating current 220V signal shaping, then to be output to deformation of transformer winding online
The CPU of each signal acquisition module of monitoring system and processing module.
The beneficial effects of the utility model are：
The utility model directly obtains source of synchronising signal by 220V supply lines, it is not necessary to extra field wiring, makes
It is good with facility, synchronous effect.The synchronizer obtains stabilization by decaying, sampling, amplifying, filtering, gathering 220V AC signals
50HZ or so trigger signal, there is provided all signal acquisition modules and data processing mould to winding deformation on-line monitoring system
Block.All modules all use same 220V AC powers, and the phase of the synchronizing signal collected is all consistent.
The synchronizer uses wired connection mode, more stable compared to the mode for being wirelessly transferred synchronizing signal, particularly
In substation field, it is wirelessly transferred to receive and has a strong impact on that it is wrong transmission data often occur from transformer and transmission line of electricity
By mistake, phenomena such as packet loss, and transmission range is limited.
Brief description of the drawings
Fig. 1 is the structure chart of the utility model embodiment 1；
Fig. 2 is the decay isolates circuit diagram of the utility model embodiment 1；
Fig. 3 is the sample circuit figure of the utility model embodiment 1；
Fig. 4 is the filter circuit figure of the utility model embodiment 1；
Fig. 5 is the utility model embodiment 1A/D sample circuit figures；
Fig. 6 is the synchronizer of the utility model embodiment 1 to power flow chart to voltage acquisition module；
Fig. 7 is the structure chart of the utility model embodiment 2；
Fig. 8 is the rectification circuit figure figure of the utility model embodiment 2.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.
Embodiment 1
Referring to Fig. 1, it is used for the signal synchronizer of deformation of transformer winding on-line monitoring, bag in Fig. 1 dashed boxes for embodiment 1
Include the 220V AC powers being sequentially connected, decay isolation circuit, sample circuit, amplifying circuit and filter circuit, the filtered electrical
Road connects A/D sample circuits.Each signal acquisition module of synchronizer connection deformation of transformer winding monitoring system and
Data processing module, provide it synchronizing signal.Wherein, the sample circuit, amplifying circuit, filter circuit, A/D sample circuits
Powered by power supply module, the power supply module is that 220V AC voltage is realized after over commutation, filtering, voltage stabilizing.
Referring to Fig. 2, the voltage transformer uses TV31B02.TV31B02 serves the effect of isolation voltage, and 220V is handed over
After stream voltage seals in resistance R1, R2, current control is within 2mA, because TV31B02 input and output are than being 1:1, input electricity
Stream is up to 2mA, and output current maximum is also 2mA, then outputs current to the sample circuit.
Referring to Fig. 3, the electric current exported by OP2227 resistance samplings TV31B02, current signal is converted into voltage signal.
Sample resistance R1 sizes are 1000 Ω, and obtained voltage signal is less than 2V.
Voltage signal after sampling passes through the amplifying circuit, transmits to the filter circuit.Referring to Fig. 4, the filtering
Circuit uses two rank low pass filters being made up of OP2227.The filter circuit filters out high frequency spurs in signal, retained
Original 50HZ signal down.
Referring to Fig. 5, by ADS8556, it will filter after later synchronous signal acquisition comes out and be sent to CPU processing.
ADS8556 possesses the high precision collecting passage on 16,6 tunnel.
Referring to Fig. 6, the interior synchronous flow participated in by the synchronizer of dashed box.On the one hand 220V AC voltage is used as institute
The source of synchronising signal of signal synchronizer is stated, synchronizing signal is provided for voltage acquisition module；On the other hand rectified, filtering and steady
It is that the voltage acquisition module is powered after pressure processing.
Embodiment 2
The difference of embodiment 2 and embodiment 1 is that the filter circuit connects rectification circuit, passes through the rectification circuit
AC sine wave signal is converted into square-wave signal, and then inputs each module CPU processing.
Referring to Fig. 8, the shaping circuit is multistage shaping circuit.By using 74HC14, based on 6 tunnel Schmitt triggers
Multiple signal shaping is realized, original AC signal is shaped as square-wave signal, then be output to deformation of transformer winding and supervise online
The CPU of each signal acquisition module of examining system and processing module.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
- A kind of 1. signal synchronizer for deformation of transformer winding on-line monitoring, it is characterised in that：Including what is be sequentially connected 220V AC powers, decay isolation circuit, sample circuit, amplifying circuit and filter circuit, the filter circuit connection A/D samplings Circuit or shaping circuit.
- 2. synchronizer according to claim 1, it is characterised in that：The decay isolation circuit includes voltage transformer, After the 220V power series resistance, it is connected with the decay isolation circuit.
- 3. synchronizer according to claim 2, it is characterised in that：The voltage transformer input and output electric current ratio is 1: 1。
- 4. synchronizer according to claim 3, it is characterised in that：The voltage transformer uses TV31B02.
- 5. synchronizer according to claim 1, it is characterised in that：The sample circuit sample resistance between 500 Ω~ 1000Ω。
- 6. synchronizer according to claim 5, it is characterised in that：The sample circuit uses OP2227.
- 7. synchronizer according to claim 1, it is characterised in that：The filter circuit uses two rank low pass filters.
- 8. synchronizer according to claim 1, it is characterised in that：The shaping circuit uses multistage shaping circuit.
- 9. synchronizer according to claim 1, it is characterised in that：It is logical that the A/D sample circuits possess the collection of 16,6 tunnel Road.
- 10. synchronizer according to claim 9, it is characterised in that：The A/D sample circuits use ADS8556.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720292274.1U CN206657074U (en) | 2017-03-23 | 2017-03-23 | A kind of signal synchronizer for deformation of transformer winding on-line monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720292274.1U CN206657074U (en) | 2017-03-23 | 2017-03-23 | A kind of signal synchronizer for deformation of transformer winding on-line monitoring |
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| Publication Number | Publication Date |
|---|---|
| CN206657074U true CN206657074U (en) | 2017-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720292274.1U Expired - Fee Related CN206657074U (en) | 2017-03-23 | 2017-03-23 | A kind of signal synchronizer for deformation of transformer winding on-line monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525212A (en) * | 2018-12-29 | 2019-03-26 | 西安交通大学 | A kind of intelligent scanning signal processing unit and working method |
-
2017
- 2017-03-23 CN CN201720292274.1U patent/CN206657074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525212A (en) * | 2018-12-29 | 2019-03-26 | 西安交通大学 | A kind of intelligent scanning signal processing unit and working method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171121 Termination date: 20180323 |