CN107342576A - A kind of high-tension switch cabinet on-line monitoring and early warning guard method and its system - Google Patents
A kind of high-tension switch cabinet on-line monitoring and early warning guard method and its system Download PDFInfo
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- CN107342576A CN107342576A CN201710415304.8A CN201710415304A CN107342576A CN 107342576 A CN107342576 A CN 107342576A CN 201710415304 A CN201710415304 A CN 201710415304A CN 107342576 A CN107342576 A CN 107342576A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
Abstract
Comprise the following steps the invention discloses a kind of high-tension switch cabinet on-line monitoring with early warning guard method and its system, this method：Gather in real time and store each bus of high-tension switch cabinet or the temperature data of contact, and be transferred to monitoring server；Monitoring server receives temperature data, generates the temperature curve in each bus or contact preset time period, and carry out wavelet package transforms denoising to temperature curve；According to temperature curve after denoising, the unequal interval temperature sequence of each bus or contact in preset time period is obtained；The second-order difference equation of predicted temperature is built, second-order difference equation is fitted using unequal interval temperature sequence, the coefficient of second-order difference equation is asked for by the principle of least square；So as to obtain the temperature prediction formula of each contact or bus；The contact after preset time or the predicting temperature values of bus are obtained according to temperature prediction formula, when predicting temperature values are more than alarm threshold value, send alarm.
Description
Technical field
The present invention relates to electrical equipment technical field, and in particular to a kind of high-tension switch cabinet on-line monitoring and early warning protection side
Method and its system.
Background technology
High-tension switch cabinet is control main in transformer substation system and protection equipment, to power system security, is reliably transported
Row plays vital effect.Using dynamic and static contact between the trolley type switch cabinet and breaker that are commonly used
Plug couples, and has a contact resistance in dynamic and static contact, between them, when electric current flows through contact, will cause tactile
The heating of point, therefore the maximum allowable heating temp of contact is defined in national standard and allows temperature rise, during normal operation, move,
The rise of stationary contact temperature is without departing from defined scope.But dolly and switch cubicle because manufacture, transport and install it is bad etc. all
Poor contact of contacts can be caused, meanwhile, in During Process of Long-term Operation, dynamic and static contact also often occurs that contact surface is unclean, contact
Oxidation, phenomena such as mechanically deform loosens, these will all cause contact resistance to increase, and cause contact temperature rise to exceed defined scope,
Cause electrical equipment to be burnt out, or even the major accidents such as fire occur, these phenomenons are on high-current switch such as incoming line cabinet
It is especially prominent, and influence very big.Meanwhile switch cubicle is also the visual plant in power plant, break-make, control are served in power system
The effect that system and protection generate electricity, the power supply of various equipment is also all realized by high-tension switch cabinet group, if one of them
Break down and can not be handled in time, once unit is out of service, loss is huge.
In order to avoid switch cubicle causes electric power safety accident, it is necessary to be supervised to the temperature of switch cubicle because temperature is too high
Survey, find the temperature anomaly of switch cubicle in time.Existing switch cubicle thermometric mode mainly has contact temperature-measuring and contactless survey
Warm two major classes.Contact temperature-measuring is that sensor is placed in in object identical thermal equilibrium state, making sensor be kept with object
The thermometry of same temperature.Such as mercurial thermometer, pressure-type thermometer and bimetallic thermometer；Thermal resistance, thermistor, electronics
The thermometric mode such as formula temperature sensor and thermocouple, and temperature display wax sheet, optical fiber temperature-measurement etc..Wherein temperature display wax sheet is earliest by people
Be used for electrical connector overheat temperature indicating product, temperature display wax sheet method be according to color chips color with temperature difference and change
The wax disk(-sc) (color is different) of different melting points is affixed in high-tension switch cabinet easy heat spot position by principle, according to the fusing situation of wax disk(-sc)
Judge the substantially temperature conditions of easy heat spot, this method thermometric degree of accuracy is low, poor reliability.Thermistor temperature detecting method is in switch cubicle
Show very big error under internal rugged environment, wiring is complicated and thermistor is fragile, maintenance difficulties are big.It is contactless
Infrared measurement of temperature is also radiation temperature measurement, and contactless temperature-measuring is need not come measurement temperature, temperature element by heat radiation principle
Contacted with testee, mainly there is IR thermometry.
Existing switch cubicle thermometry constantly improves, for the accuracy rate also more and more higher of switch cabinet temperature change,
But most of work for high-tension switch cabinet is all concentrated on on-line monitoring at present, is at best able to accomplish Realtime Alerts, nothing
Method gives warning in advance before the failure occurs, accomplishes to prevent trouble before it happens, and avoids the generation of accident or further expands, improving power supply can
By property.
The content of the invention
It is an object of the invention to provide a kind of high-tension switch cabinet on-line monitoring with early warning guard method and its system, to
Solves the technical problem that existing high-tension switch cabinet can not be given warning in advance for bus, contact temperature rise.
To achieve the above object, the inventive method to gather the temperature data of each bus or contact as prediction base in real time
Plinth, by wavelet package transforms denoising, then according to the initial temperature data acquisition time cycle, obtain class interval temperature
Sequence, temperature prediction formula corresponding to each bus or contact is then obtained by second-order difference equation；So as to propose one
Kind high-tension switch cabinet on-line monitoring and early warning guard method.Specifically, this method comprises the following steps：
Gather in real time and store each bus of high-tension switch cabinet or the temperature data of contact, and be transferred to monitoring service
Device；
The monitoring server receives the temperature data, generates each bus or the contact preset time period
Interior temperature curve, and wavelet package transforms denoising is carried out to the temperature curve；
According to the temperature curve after denoising, each bus or the contact are obtained in preset time period
Unequal interval temperature sequence；
The second-order difference equation of predicted temperature is built, using the unequal interval temperature sequence to the second-order difference equation
It is fitted, the coefficient of the second-order difference equation is asked for by the principle of least square；So as to obtain each contact or institute
State the temperature prediction formula of bus；
The contact after preset time or the predicting temperature values of the bus are obtained according to the temperature prediction formula, when
When the predicting temperature values are more than alarm threshold value, alarm is sent.
Further, when each bus of the high-tension switch cabinet gathered in real time or the temperature data of contact are more than rotection thresholds
When, supply lines is cut off by the shearing device for being arranged on the high-voltage switch cabinet wire inlet mouth.
Further, the detailed process of the temperature curve progress wavelet package transforms denoising is：
Wavelet packet coefficient corresponding to WAVELET PACKET DECOMPOSITION acquisition is carried out to the temperature curve using wavelet function；Preferably,
WAVELET PACKET DECOMPOSITION is carried out using " db10 " small echo, the classification number of plies is three layers.
Denoising is carried out using a given threshold, the coefficient more than the given threshold keeps constant, otherwise zero setting, and it is expressed
Formula is：
Wherein：T is given threshold, and Cij is the wavelet coefficient on each node；
The temperature data after denoising is reconstructed, obtains the temperature curve after denoising.
Preferably, the given threshold is that minimum greatly variance threshold values T expression formula is
Wherein σ is that noise criteria is poor.
Further, it is right before being fitted using the unequal interval temperature sequence to the second-order difference equation
The unequal interval temperature sequence carries out interpolation processing.
Specifically, the temperature data of unequal interval temperature sequence is inserted using Newton-first three point interpolation method principle
Value processing.
Further, obtained after being fitted using the unequal interval temperature sequence to the second-order difference equation described
The second-order difference equation of predicted temperature is as follows：
yt=a0+a1yt-24+a2yt-48
Wherein, ytBus or contact temperature value for the high-tension switch cabinet of t, a0, a1, a2For difference equation coefficient；
The difference equation coefficient causes
With minimum value, so as to obtain a0, a1, a2Numerical value, obtain the temperature prediction formula.
Based on same invention conceive, present invention also offers a kind of high-tension switch cabinet on-line monitoring and early warning protection system,
Including data acquisition device, communicator, monitoring server, the data acquisition device is arranged in each high-tension switch cabinet,
For gathering bus or contact temperature data in the high-tension switch cabinet in real time；The communicator is used for the bus
Or the temperature data of the contact is transferred to the monitoring server, bus or described described in the monitoring server reception processing
The temperature data of contact, each bus or the predicted temperature of the contact after predetermined time are predicted, and send alarm.
Further, the high-tension switch cabinet on-line monitoring also includes electromagnetism thread cutter with early warning protection system, described
Electromagnetism thread cutter is arranged on the incoming line position of the high-tension switch cabinet, for the temperature number in the bus or the contact
During according to more than rotection thresholds, supply lines is cut off.
Further, the data acquisition device includes fiber-optical grating temperature sensor and fiber grating demodulation device, described
Fiber-optical grating temperature sensor is bonded or is embedded in each bus or the contact position；The optical fiber grating temperature passes
Sensor is connected with the fiber grating demodulation device, obtains the bus or the temperature data of the contact in real time.
Further, the communicator includes ZigBee communication module, router and telegon, and each height presses off
Close and be provided with the ZigBee communication module on cabinet, the ZigBee communication module by the router and the telegon with
The monitoring server realizes that data communicate.
Further, the electromagnetism thread cutter includes thread cutter body, electromagnetism push rod, tangential knife and tangent line platform, supplies
Electric wire is located in the thread cutter body by one group of electrical fixed cover, and the electromagnetism push rod is arranged on the thread cutter
Body upper part, the tangential knife are correspondingly arranged both sides with the tangent line platform above and below the supply lines, the electromagnetism push rod it is defeated
Go out end and the tangential knife is installed.
The inventive method has the following advantages that：
High-tension switch cabinet on-line monitoring provided by the invention and early warning guard method and its system, by gathering high pressure in real time
The bus or contact temperature data of switch cubicle, are handled by monitoring server according to temperature data, can obtain bus
Or the predicted temperature at contact following certain moment, so as to know whether the temperature of high-tension switch cabinet is abnormal in advance, in advance
The security incident that may occur is handled, so as to ensure power supply safety.
Brief description of the drawings
Fig. 1 is the first high-tension switch cabinet on-line monitoring and early warning guard method FB(flow block) of the embodiment of the present invention.
Fig. 2 is second of high-tension switch cabinet on-line monitoring and early warning guard method FB(flow block) of the embodiment of the present invention.
Fig. 3 is a kind of high-tension switch cabinet on-line monitoring and early warning protection system structural representation of the embodiment of the present invention.
Fig. 4 is a kind of temperature and time graph of a relation of the embodiment of the present invention；
Fig. 5 is the data acquisition device and communicator system structured flowchart of the embodiment of the present invention.
Fig. 6 is the electromagnetism thread cutter main structure diagram of the embodiment of the present invention.
Wherein, 10- high-tension switch cabinets, 20- data acquisition devices, 30- communicators, 31- routers, 32- telegons,
40- electromagnetism thread cutters, 50- supply lines, 60- monitoring servers；
41- thread cutter bodies, 42- electric wire fixed covers, 43- electromagnetism push rods, 44- tangential knifes, 45- tangent line platforms.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
As shown in figure 1, the present invention proposes a kind of high-tension switch cabinet on-line monitoring and early warning guard method.Specifically, should
Method comprises the following steps：
S101, gather in real time and store each bus of high-tension switch cabinet or the temperature data of contact, and be transferred to monitoring
Server；
S102, the monitoring server receive the temperature data, when generating each bus or the default contact
Between temperature curve in the cycle, and wavelet package transforms denoising is carried out to the temperature curve；
S103, according to the temperature curve after denoising, obtain each bus or the contact in preset time
Unequal interval temperature sequence in cycle；
S104, the second-order difference equation for building predicted temperature, using the unequal interval temperature sequence to two jump
Divide equation to be fitted, the coefficient of the second-order difference equation is asked for by the principle of least square；It is each described tactile so as to obtain
The temperature prediction formula of point or the bus；
S105, according to the temperature prediction formula obtain preset time after the contact or the bus predicted temperature
Value, when the predicting temperature values are more than alarm threshold value, sends alarm.
By being substantially real incessantly to (such as 1 day, 1 week, time cycle of setting in January) in preset time period
When monitor high-tension switch cabinet bus or contact temperature, using this timing node as line of demarcation, preset time period is this time
The setting time such as 1 day, 1 week before node or January；When predicted time is the settings such as 1 day, 1 week after this timing node or January
Between；Temperature prediction formula is obtained by bus or the contact temperature processing gathered in preset time period, according to temperature prediction
Formula obtains the following bus sometime put or contact temperature predicted value, and alarm whether is sent with alarm threshold value multilevel iudge
Prompting.Bus, the contact temperature of high-tension switch cabinet, when voltage, ambient parameter are constant within a period of time, as in 1 month
Voltage, ambient parameter will not undergo mutation, and therefore, bus, the contact temperature of high-tension switch cabinet are gradually changeables, that is to say front and rear one
Bus, the contact temperature of section time has relevance, so as to predict the following a certain moment by historical temperature data
Temperature.
The principle of difference equation：
The mathematical modeling for describing n rank linear continuous systems is the n rank differential equations, and describes the number of n rank linear discrete systems
It is n order difference equations to learn model.Time is represented with t, it is specified that t only negated negative integers.At the beginning of t=0 represents the period 1, t=1 is represented
Second round is elementary.Remember ytFor values of the variable y in moment t, then claim Δ yt=yt+1-ytFor ytFirst-order difference, claim Δ2yt
=Δ (Δ yt)=Δ yt+1-Δyt=yt+2-2yt+1+ytFor ytSecond differnce.Similarly, y can be definedtN order differences.
For the bus or contact temperature of switch cubicle, if the temperature value of t is yt, consider the influence of environmental factor, structure
Make second-order difference equation yt=a0+a1yt-24+a2yt-48, it is fitted using all temperature datas, is asked by the principle of least square
Coefficient a0, a1, a2。
As shown in Fig. 2 the invention provides another high-tension switch cabinet on-line monitoring and early warning guard method.Specifically,
This method comprises the following steps：
S201, gather in real time and store each bus of high-tension switch cabinet or the temperature data of contact, and be transferred to monitoring
Server；
S202, the monitoring server receive the temperature data, when generating each bus or the default contact
Between temperature curve in the cycle, and wavelet package transforms denoising is carried out to the temperature curve；
S203, according to the temperature curve after denoising, obtain each bus or the contact in preset time
Unequal interval temperature sequence in cycle；
S204, the second-order difference equation for building predicted temperature, using the unequal interval temperature sequence to two jump
Divide equation to be fitted, the coefficient of the second-order difference equation is asked for by the principle of least square；It is each described tactile so as to obtain
The temperature prediction formula of point or the bus；
S205, according to the temperature prediction formula obtain preset time after the contact or the bus predicted temperature
Value, when the predicting temperature values are more than alarm threshold value, sends alarm.
S206, when each bus of the high-tension switch cabinet gathered in real time or the temperature data of contact are more than rotection thresholds,
Supply lines is cut off by the shearing device for being arranged on the high-voltage switch cabinet wire inlet mouth.
Wherein, the detailed process of the temperature curve progress wavelet package transforms denoising is：
Wavelet packet coefficient corresponding to WAVELET PACKET DECOMPOSITION acquisition is carried out to the temperature curve using wavelet function；Preferably,
WAVELET PACKET DECOMPOSITION is carried out using " db10 " small echo, the classification number of plies is three layers.
Denoising is carried out using a given threshold, the coefficient more than the given threshold keeps constant, otherwise zero setting, and it is expressed
Formula is：
Wherein：T is given threshold, and Cij is the wavelet coefficient on each node；
The temperature data after denoising is reconstructed, obtains the temperature curve after denoising.
Preferably, the given threshold is that minimum greatly variance threshold values T expression formula is
Wherein σ is that noise criteria is poor.
The main method of wavelet packet analysis is exactly WAVELET PACKET DECOMPOSITION；WAVELET PACKET DECOMPOSITION have analysis transition and non-stationary or when
Become the ability of phenomenon, it can provide the multiple dimensioned and multiresolution analysis of time and frequency simultaneously, to low frequency part and high frequency
Partial synchronization is implemented to decompose.And WAVELET PACKET DECOMPOSITION can require according to the characteristic and analysis of analyzed signal, adaptively selection is corresponding
Frequency band matches with signal spectrum, so as to improve time frequency resolution, is provided well for significantly more efficient extraction signal characteristic
Basis.
Temperature sensor in temperature of high-tension switch cabinet measurement point is by the various electromagnetic noise interferences of nearlyer frequency band, temperature
Different degrees of shake is presented in curve, and it is gaussian additive noise to be approximately considered noise.WAVELET PACKET DECOMPOSITION is carried out to temperature curve to obtain
To the wavelet coefficient and detail coefficients of a series of description Signal approximations, choosing of the de-noising namely to wavelet conversion coefficient to signal
Select process：Retain the wavelet conversion coefficient of description signal characteristic, remove the wavelet coefficient of description noise spike signal.
For the body feature of keeping temperature data, noise disturbance is removed as far as possible, reaches the purpose of smooth optimization sample.Protect
It is constant to hold the low-frequency wavelet coefficients that description approaches, to high frequency detail wavelet coefficient threshold.It is accurate using minimum greatly variance threshold values
Then selected threshold so that the threshold value of selection produces minimum very big variance.
Lu that makes an uproar of high-tension switch cabinet is mainly that the electromagnetic wave that temperature sensor induces one is made an uproar Lu, cause temperature curve burr compared with
It is more.Set by the selection of above-mentioned threshold method and threshold value, filter out the wavelet coefficient that can describe signal characteristic, reach reduction and make an uproar
The influence of sound and the purpose for retaining the important information of primary signal, curve is become single smooth, remove the temperature data of shake
Influence.Detailed process is described as follows.
The first step：Choose suitable wavelet function, threshold method, Decomposition order and wavelet package transforms are carried out to signal；
Second step：Wavelet conversion coefficient is screened, setting threshold value carries out denoising.
3rd step：To the signal reconstruction after denoising, the signal after denoising is obtained.
As shown in figure 3, carrying out WAVELET PACKET DECOMPOSITION using " db10 " small echo, the classification number of plies is three layers, to the items after decomposition
After wavelet coefficient is cut down, signal reconstruction obtains new signal.Signal had both remained important feature, was unlikely to light splitting again
It is sliding.
Wherein, before being fitted using the unequal interval temperature sequence to the second-order difference equation, to described
Unequal interval temperature sequence carries out interpolation processing.
Specifically, the temperature data of unequal interval temperature sequence is inserted using Newton-first three point interpolation method principle
Value processing:
First so that unequal interval temperature sequence X(0)={ X(0)(Pi),P∈N+, i=1,2,3,4 ..., n }, make ipFor
Less than PiPositive integer, so as to Δ Pi=Pi-ip；
Then, temperature sequence at equal intervals is built
In formula, work as ip=PiWhen,
Finally, interpolation calculation is carried out using Newton-first three point interpolation multinomial, its formula is as follows：
In formula,
Wherein, the prediction is obtained after being fitted using the unequal interval temperature sequence to the second-order difference equation
The second-order difference equation of temperature is as follows：
yt=a0+a1yt-24+a2yt-48
Wherein, ytBus or contact temperature value for the high-tension switch cabinet of t, a0, a1, a2For difference equation coefficient；
The difference equation coefficient causes
With minimum value, so as to obtain a0, a1, a2Numerical value, obtain the temperature prediction formula.
Embodiment 2
Conceived based on same invention, as shown in Figure 3,4, present invention also offers a kind of high-tension switch cabinet on-line monitoring and in advance
Alert protection system, including data acquisition device 20, communicator 30, monitoring server 60, the data acquisition device 20 are set
In each high-tension switch cabinet 10, for gathering bus or contact temperature data in the high-tension switch cabinet 10 in real time；Institute
Communicator 30 is stated to be used to the temperature data of the bus or the contact being transferred to the monitoring server 60, the monitoring
Bus or the temperature data of the contact described in the reception processing of server 60, predict each bus or described after predetermined time
The predicted temperature of contact, and send alarm.
Wherein, the high-tension switch cabinet on-line monitoring also includes electromagnetism thread cutter 40, the electricity with early warning protection system
Magnetic thread cutter 40 is arranged on the incoming line position of the high-tension switch cabinet 10, for the temperature in the bus or the contact
When data are more than rotection thresholds, supply lines 50 is cut off.
Wherein, the data acquisition device 20 includes fiber-optical grating temperature sensor and fiber grating demodulation device, the light
Fine grating temperature sensor fitting is embedded in each bus or the contact position；The fiber grating temperature sensor
Device is connected with the fiber grating demodulation device, obtains the bus or the temperature data of the contact in real time.
Wherein, the communicator 30 includes ZigBee communication module, router 31 and telegon 32, each high pressure
The ZigBee communication module is provided with switch cubicle 10, the ZigBee communication module passes through the router 31 and the association
Device 32 is adjusted to realize that data communicate with the monitoring server 60.
As shown in figure 5, the electromagnetism thread cutter 40 includes thread cutter body 41, electromagnetism push rod 43, the and of tangential knife 44
Tangent line platform 45, supply lines 50 are located in the thread cutter body 41 by one group of electrical fixed cover 42, the electromagnetism push rod
43 are arranged on the top of thread cutter body 41, and the tangential knife 44 and the tangent line platform 45 are in the supply lines two about 50
Side is correspondingly arranged, and the output end of the electromagnetism push rod 43 installs the tangential knife 44.
High-tension switch cabinet on-line monitoring provided by the invention and early warning guard method and its system, by gathering high pressure in real time
The bus or contact temperature data of switch cubicle, are handled by monitoring server according to temperature data, can obtain bus
Or the predicted temperature at contact following certain moment, so as to know whether the temperature of high-tension switch cabinet is abnormal in advance, in advance
The security incident that may occur is handled, so as to ensure power supply safety.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (10)
1. a kind of high-tension switch cabinet on-line monitoring and early warning guard method, it is characterised in that methods described comprises the following steps：
Gather in real time and store each bus of high-tension switch cabinet or the temperature data of contact, and be transferred to monitoring server；
The monitoring server receives the temperature data, generates in each bus or the contact preset time period
Temperature curve, and wavelet package transforms denoising is carried out to the temperature curve；
According to the temperature curve after denoising, obtain each bus or the contact is non-in preset time period
Temperature sequence at equal intervals；
The second-order difference equation of predicted temperature is built, the second-order difference equation is carried out using the unequal interval temperature sequence
Fitting, the coefficient of the second-order difference equation is asked for by the principle of least square；So as to obtain each contact or the mother
The temperature prediction formula of line；
The contact after preset time or the predicting temperature values of the bus are obtained according to the temperature prediction formula, when described
When predicting temperature values are more than alarm threshold value, alarm is sent.
2. a kind of high-tension switch cabinet on-line monitoring according to claim 1 and early warning guard method, it is characterised in that work as reality
When each bus of high-tension switch cabinet for the gathering or temperature data of contact when being more than rotection thresholds, by being arranged on the high pressure
The shearing device of switch cubicle incoming line cuts off supply lines.
3. a kind of high-tension switch cabinet on-line monitoring according to claim 1 and early warning guard method, it is characterised in that described
Temperature curve carry out wavelet package transforms denoising detailed process be：
Wavelet packet coefficient corresponding to WAVELET PACKET DECOMPOSITION acquisition is carried out to the temperature curve using wavelet function；
Denoising is carried out using a given threshold, the coefficient more than the given threshold keeps constant, otherwise zero setting, its expression formula
For：
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The temperature data after denoising is reconstructed, obtains the temperature curve after denoising.
Preferably, the given threshold is that minimum greatly variance threshold values T expression formula is
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</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mn>0</mn>
<mo>,</mo>
</mrow>
</mtd>
<mtd>
<mrow>
<mi>N</mi>
<mo><</mo>
<mn>32</mn>
<mo>,</mo>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
Wherein σ is that noise criteria is poor.
4. a kind of high-tension switch cabinet on-line monitoring according to claim 1 and early warning guard method, it is characterised in that in profit
Before being fitted with the unequal interval temperature sequence to the second-order difference equation, the unequal interval temperature sequence is entered
Row interpolation processing.
5. a kind of high-tension switch cabinet on-line monitoring according to claim 1 and early warning guard method, it is characterised in that utilize
The unequal interval temperature sequence obtains the second differnce side of the predicted temperature after being fitted to the second-order difference equation
Journey is as follows：
yt=a0+a1yt-24+a2yt-48
Wherein, ytBus or contact temperature value for the high-tension switch cabinet of t, a0, a1, a2For difference equation coefficient；
The difference equation coefficient causes
<mrow>
<mi>f</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>a</mi>
<mn>0</mn>
</msub>
<mo>,</mo>
<msub>
<mi>a</mi>
<mn>1</mn>
</msub>
<mo>,</mo>
<msub>
<mi>a</mi>
<mn>2</mn>
</msub>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>t</mi>
<mo>=</mo>
<mn>49</mn>
</mrow>
<mi>n</mi>
</munderover>
<msup>
<mrow>
<mo>&lsqb;</mo>
<msub>
<mi>y</mi>
<mi>t</mi>
</msub>
<mo>-</mo>
<mrow>
<mo>(</mo>
<msub>
<mi>a</mi>
<mn>0</mn>
</msub>
<mo>+</mo>
<msub>
<mi>a</mi>
<mn>1</mn>
</msub>
<msub>
<mi>y</mi>
<mrow>
<mi>t</mi>
<mo>-</mo>
<mn>24</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>a</mi>
<mn>2</mn>
</msub>
<msub>
<mi>y</mi>
<mrow>
<mi>t</mi>
<mo>-</mo>
<mn>48</mn>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
With minimum value, so as to obtain a0, a1, a2Numerical value, obtain the temperature prediction formula.
6. a kind of high-tension switch cabinet on-line monitoring and early warning protection system, the system include data acquisition device, communicator
And monitoring server, it is characterised in that the data acquisition device is arranged in each high-tension switch cabinet, for gathering institute in real time
State the bus or contact temperature data in high-tension switch cabinet；The communicator is used for the temperature of the bus or the contact
Degrees of data is transferred to the monitoring server, bus described in the monitoring server reception processing or the temperature number of the contact
According to, each bus or the predicted temperature of the contact after prediction predetermined time, and send alarm.
7. a kind of high-tension switch cabinet on-line monitoring according to claim 6 and early warning protection system, it is characterised in that described
High-tension switch cabinet is monitored on-line also includes electromagnetism thread cutter with early warning protection system, and the electromagnetism thread cutter is arranged on described
The incoming line position of high-tension switch cabinet, for when the temperature data of the bus or the contact is more than rotection thresholds, cutting off
Supply lines.
8. a kind of high-tension switch cabinet on-line monitoring according to claim 6 and early warning protection system, it is characterised in that described
Data acquisition device includes fiber-optical grating temperature sensor and fiber grating demodulation device, the fiber-optical grating temperature sensor fitting
Or it is embedded in each bus or the contact position；The fiber-optical grating temperature sensor and the fiber grating demodulation
Device connects, and obtains the bus or the temperature data of the contact in real time.
9. a kind of high-tension switch cabinet on-line monitoring according to claim 6 and early warning protection system, it is characterised in that described
Communicator includes ZigBee communication module, router and telegon, is provided with each high-tension switch cabinet described
ZigBee communication module, the ZigBee communication module are real by the router and the telegon and the monitoring server
Existing data communication.
10. a kind of high-tension switch cabinet on-line monitoring according to claim 7 and early warning protection system, it is characterised in that institute
Stating electromagnetism thread cutter includes thread cutter body, electromagnetism push rod, tangential knife and tangent line platform, and supply lines is electrically fixed by one group
Set is located in the thread cutter body, and the electromagnetism push rod is arranged on the thread cutter body upper part, the tangential knife
It is correspondingly arranged both sides above and below the supply lines with the tangent line platform, the output end of the electromagnetism push rod installs the tangential knife.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085413A (en) * | 2018-07-25 | 2018-12-25 | 重庆骞纳马科技有限公司 | A kind of non-contact type high voltage switchgear safety detecting system and its control method |
| CN109406004A (en) * | 2018-09-18 | 2019-03-01 | 广东电网有限责任公司惠州供电局 | A kind of switchgear temperature rise analytical method |
| CN109728565A (en) * | 2019-02-13 | 2019-05-07 | 王者龙 | A kind of electric wire heat intelligent monitoring device |
| CN109945988A (en) * | 2019-02-21 | 2019-06-28 | 中电科安科技股份有限公司 | A kind of Internet of Things breaker line temperature high-precision detecting method and device |
| CN110926651A (en) * | 2019-11-13 | 2020-03-27 | 芜湖伊莱特电气有限公司 | Power distribution cabinet detection method and device |
| CN111008714A (en) * | 2019-12-17 | 2020-04-14 | 武汉伊莱维特电力科技有限公司 | Big data analysis-based operation and maintenance method for heating defect of control equipment |
| CN111884334A (en) * | 2020-07-01 | 2020-11-03 | 南京合纵电力设备有限公司 | Monitoring method and system suitable for unattended low-voltage cabinet |
| CN112703380A (en) * | 2018-09-14 | 2021-04-23 | 兰迪斯+盖尔股份有限公司 | Electrical instrument thermal performance monitoring |
| CN113325906A (en) * | 2021-06-10 | 2021-08-31 | 上海电气风电集团股份有限公司 | Humidity control method, system, equipment and medium for electrical components of wind turbine generator |
| CN114093144A (en) * | 2021-10-28 | 2022-02-25 | 许昌许继软件技术有限公司 | Switch cabinet temperature early warning method and system |
| CN114745615A (en) * | 2022-06-09 | 2022-07-12 | 联科天成(武汉)智能科技有限公司 | Industrial equipment operation data acquisition monitoring method and device |
| CN115036890A (en) * | 2022-08-11 | 2022-09-09 | 山东国信电力科技有限公司 | Temperature sensing protection system and protection method based on low-voltage photovoltaic intelligent switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374423A (en) * | 2014-10-21 | 2015-02-25 | 深圳供电局有限公司 | Cluster high-tension switch cabinet online monitoring device and monitoring method thereof |
| CN104937802A (en) * | 2012-11-28 | 2015-09-23 | Abb技术有限公司 | Monitoring operating condition of electrical component |
| CN106124089A (en) * | 2016-09-12 | 2016-11-16 | 国网辽宁省电力有限公司锦州供电公司 | High-tension switch cabinet temperature measurement on-line method based on gray theory |
-
2017
- 2017-06-05 CN CN201710415304.8A patent/CN107342576A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937802A (en) * | 2012-11-28 | 2015-09-23 | Abb技术有限公司 | Monitoring operating condition of electrical component |
| CN104374423A (en) * | 2014-10-21 | 2015-02-25 | 深圳供电局有限公司 | Cluster high-tension switch cabinet online monitoring device and monitoring method thereof |
| CN106124089A (en) * | 2016-09-12 | 2016-11-16 | 国网辽宁省电力有限公司锦州供电公司 | High-tension switch cabinet temperature measurement on-line method based on gray theory |
Non-Patent Citations (3)
| Title |
|---|
| 林椹尠: "一种高压开关柜温度预测的改进方法", 《西安邮电大学学报》 * |
| 胡忠: "基于改进非等间隔差分方程的高压开关柜故障预测", 《电气时代》 * |
| 陈强: "基于多点分布式光纤光栅的GIS隔离开关触头温度的在线监测技术", 《电工技术学报》 * |
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| CN112703380A (en) * | 2018-09-14 | 2021-04-23 | 兰迪斯+盖尔股份有限公司 | Electrical instrument thermal performance monitoring |
| CN109406004A (en) * | 2018-09-18 | 2019-03-01 | 广东电网有限责任公司惠州供电局 | A kind of switchgear temperature rise analytical method |
| CN110752582A (en) * | 2019-02-13 | 2020-02-04 | 王庆召 | Intelligent power-off device for electric wire |
| CN110752583B (en) * | 2019-02-13 | 2021-10-22 | 北京康吉森技术有限公司 | Intelligent early warning power-off device and method for heat of electric wire |
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| CN110752582B (en) * | 2019-02-13 | 2021-11-30 | 国网江苏省电力有限公司常州供电分公司 | Intelligent power-off device for electric wire |
| CN109728565A (en) * | 2019-02-13 | 2019-05-07 | 王者龙 | A kind of electric wire heat intelligent monitoring device |
| CN109945988A (en) * | 2019-02-21 | 2019-06-28 | 中电科安科技股份有限公司 | A kind of Internet of Things breaker line temperature high-precision detecting method and device |
| CN110926651A (en) * | 2019-11-13 | 2020-03-27 | 芜湖伊莱特电气有限公司 | Power distribution cabinet detection method and device |
| CN111008714A (en) * | 2019-12-17 | 2020-04-14 | 武汉伊莱维特电力科技有限公司 | Big data analysis-based operation and maintenance method for heating defect of control equipment |
| CN111884334A (en) * | 2020-07-01 | 2020-11-03 | 南京合纵电力设备有限公司 | Monitoring method and system suitable for unattended low-voltage cabinet |
| CN113325906A (en) * | 2021-06-10 | 2021-08-31 | 上海电气风电集团股份有限公司 | Humidity control method, system, equipment and medium for electrical components of wind turbine generator |
| CN114093144A (en) * | 2021-10-28 | 2022-02-25 | 许昌许继软件技术有限公司 | Switch cabinet temperature early warning method and system |
| CN114093144B (en) * | 2021-10-28 | 2023-09-08 | 许昌许继软件技术有限公司 | Switch cabinet temperature early warning method and system |
| CN114745615A (en) * | 2022-06-09 | 2022-07-12 | 联科天成(武汉)智能科技有限公司 | Industrial equipment operation data acquisition monitoring method and device |
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| CN115036890A (en) * | 2022-08-11 | 2022-09-09 | 山东国信电力科技有限公司 | Temperature sensing protection system and protection method based on low-voltage photovoltaic intelligent switch |
| CN115036890B (en) * | 2022-08-11 | 2022-10-25 | 山东国信电力科技有限公司 | Temperature sensing protection system and protection method based on low-voltage photovoltaic intelligent switch |
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