CN106597148A - Residual voltage monitoring based state monitoring system and method for lightning arrester without serial gap - Google Patents
Residual voltage monitoring based state monitoring system and method for lightning arrester without serial gap Download PDFInfo
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- CN106597148A CN106597148A CN201611058831.XA CN201611058831A CN106597148A CN 106597148 A CN106597148 A CN 106597148A CN 201611058831 A CN201611058831 A CN 201611058831A CN 106597148 A CN106597148 A CN 106597148A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The invention relates to a residual voltage monitoring based state monitoring system and method for a lightning arrester without a serial gap. The system comprises the lightning arrester, a ceramic capacitor insulator and a residual voltage monitor, one side of the lightning arrester is electrically connected with a high tension transmission line, the other side of the lightning arrester is electrically connected with a ground wire, the ceramic capacitor insulator comprises a high voltage arm and a low voltage arm connected to the high tension transmission line successively in parallel, the residual voltage monitor comprises a power taking module, a voltage signal processing module, a processor and a transmission module, the power taking module is electrically connected with the voltage signal processing module, the processor and the transmission module, the processor is electrically connected with the voltage signal processing module and the transmission module, the power taking module is connected to the two ends of the low voltage arm of the ceramic capacitor insulator, and the processor is in communication connection with a background lightning arrester state monitoring center via the transmission module. The system provided by the invention records the over-residual-voltage waveform of the lightning arrester completely and accurately, and monitors the online lightning arrester in real time.
Description
Technical field
The present invention relates to power system arrester monitoring technical field, more particularly to it is a kind of based on residual voltage monitor without string
Connection gap arrester condition monitoring system and method.
Background technology
One of visual plant of power system during arrester, conventional at present is the Zinc-Oxide Arrester of not band gap, its
It is mainly used in limiting the internal overvoltage that the thunder and lightning overvoltage transmitted by circuit or operation cause.
In correlation technique, mainly there are leakage current method, penalty method, zero sequence electricity to Zinc-Oxide Arrester state on_line monitoring
Stream method etc., wherein, the major measure of leakage current method is：The total current change under operation of measurement Zinc-Oxide Arrester,
The change of measurement stream zinc peroxide arrester resistance current carrys out the change of monitoring zinc oxide lightning protector performance, by letting out to arrester
The monitoring of leakage current in resistance property, is further analyzed the reason for leakage current can be caused to change.
But, the stable state current in resistance property of said method monitoring is good for the effect of making moist for judging arrester, but for valve block
And casing imperfection judges that effect is poor；The transient state full-wave electric current of monitoring can only explain the lightning current size discharged by arrester, no
Can illustrate that arrester whether there is defect；And for leakage conductor, this kind of method faces power taking difficult problem.
The content of the invention
To overcome problem present in correlation technique, the present invention to provide a kind of not series gap monitored based on residual voltage and keep away
Thunder device condition monitoring system and method.
First aspect according to embodiments of the present invention, there is provided it is a kind of based on residual voltage monitor without arrester with series gaps shape
State monitoring system, including arrester, ceramic condenser insulator, residual voltage monitoring device and backstage arrester condition monitoring center, its
In：
The arrester side electrically connects with ultra-high-tension power transmission line, opposite side be electrically connected to ground；
The ceramic condenser insulator includes the high-voltage arm that is sequentially connected electrically and low-voltage arm, and the high-voltage arm and low-voltage arm are simultaneously
In being connected to ultra-high-tension power transmission line, and the high-voltage arm and low-voltage arm are fixed on shaft tower；
The residual voltage monitoring device includes electricity-fetching module, voltage signal processing module, processor and transport module, described to take
Electric module is respectively electrically connected to the voltage signal processing module, processor and transport module, the processor respectively with it is described
Voltage signal processing module and transport module are electrically connected, and the electricity-fetching module is connected to the ceramic condenser insulator low-voltage arm
Two ends, and the processor is connected by the transport module with the backstage arrester condition monitoring center to center communications.
Preferably, the ceramic condenser insulator is set to pin insulator, pillar insulator, suspension insulator or porcelain horizontal stroke
Load formula insulator.
Preferably, the electricity-fetching module is set to electromagnetic transformer.
Preferably, the transport module is GPRS module, bluetooth module or WIFI module.
Preferably, the intrinsic standoff ratio between the high-voltage arm and low-voltage arm is 500-3000.
Preferably, the capacitance of the high-voltage arm is 10pF-10nF, and the capacitance of the low-voltage arm is 10nF-10uF.
Second aspect according to embodiments of the present invention, there is provided it is a kind of based on residual voltage monitor without arrester with series gaps shape
State monitoring method, applies in residual voltage monitoring device, including：
The voltage at the ceramic condenser insulator low-voltage arm two ends of voltage signal processing module collection is obtained in real time；
Over-voltage waveform in 20-100ms is recorded according to the voltage starting over-voltage monitoring device；
The over-voltage waveform of record is sent to backstage arrester status monitoring center, to surpass when Overvoltage Amplitude
When crossing 0.5 times of the specified residual voltage amplitude of arrester, backstage arrester status monitoring center analysis process over-voltage waveform, calculate
Residual voltage value, the rise time of residual voltage waveform, hemiwave time, are contrasted to judge the state of arrester with standard residual voltage waveform.
Preferably, judge whether arrester state produces residual voltage according to the size of the voltage, including：
Judge that whether the voltage be 1.2 times or 1.5 times of system voltage, wherein, for system with effectively earthed neutral
Judge that whether the voltage be 1.2 times of system voltage, for system with non effectively earth ed neutral judges that whether the voltage be
1.5 times of system voltage；
When 1.2 times or 1.5 times that the voltage is system voltage, start in over-voltage monitoring device record 20-100ms
Over-voltage waveform.
Preferably, judge whether arrester state produces residual voltage according to the frequency of the voltage, including：
Judge the voltage whether high-frequency signal containing 500Hz-2000Hz；
When the high-frequency signal containing 500Hz-2000Hz in the voltage, start over-voltage monitoring device record 20-
Over-voltage waveform in 100ms.
Preferably, the over-voltage waveform by record is sent to backstage arrester status monitoring center, to work as
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of arrester, backstage arrester status monitoring center analysis processed electricity
Corrugating, calculates residual voltage value, the rise time of residual voltage waveform, hemiwave time, is contrasted to judge with standard residual voltage waveform
The state of arrester, including：
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of arrester, in the backstage arrester status monitoring
The heart calculates residual voltage value, the rise time of residual voltage waveform and hemiwave time according to the over-voltage waveform；
Judge the residual voltage value, the rise time of residual voltage waveform and hemiwave time whether beyond preset value；
When the residual voltage value, the rise time of residual voltage waveform and hemiwave time exceed preset value, the arrester is determined
Generation is abnormal.
The technical scheme that embodiments of the invention are provided can include following beneficial effect：
The embodiment of the present invention provide it is a kind of based on residual voltage monitor without arrester with series gaps condition monitoring system, including
Arrester, ceramic condenser insulator, residual voltage monitoring device, wherein：The arrester side electrically connects with ultra-high-tension power transmission line, another
Side be electrically connected to ground；The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, the high-voltage arm
It is connected in ultra-high-tension power transmission line with low-voltage arm, and the high-voltage arm and low-voltage arm are fixed on shaft tower；The residual voltage monitoring dress
Put including electricity-fetching module, voltage signal processing module, processor and transport module, the electricity-fetching module is respectively electrically connected to described
Voltage signal processing module, processor and transport module, the processor respectively with the voltage signal processing module and transmission
Module is electrically connected, and the electricity-fetching module is connected to the two ends of the ceramic condenser insulator low-voltage arm, and the processor passes through
The transport module is connected with the backstage arrester condition monitoring center to center communications.
Monitoring system provided in an embodiment of the present invention is high, mechanical by using higfh-tension ceramics capacitive isolator dielectric strength
Performance is good, low price the advantages of, in parallel with arrester and directly hang on transmission line of electricity, complete and accurate ground record arrester mistake
Residual voltage waveform, using residual voltage value size, the rising of waveform, the change of fall time the state of arrester is judged, right so as to reach
The purpose of online arrester real-time monitoring.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
The present invention can be limited.
Description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the enforcement for meeting the present invention
Example, and be used to explain the principle of the present invention together with specification.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 be it is provided in an embodiment of the present invention it is a kind of based on residual voltage monitor without arrester with series gaps status monitoring system
The structural representation of system；
Fig. 2 be it is provided in an embodiment of the present invention based on residual voltage monitor without arrester with series gaps condition monitoring system
Theory structure schematic diagram；
Fig. 3 be it is provided in an embodiment of the present invention it is a kind of based on residual voltage monitor without arrester with series gaps status monitoring side
The schematic flow sheet of method；
Fig. 4 be it is provided in an embodiment of the present invention it is another kind of based on residual voltage monitoring without arrester with series gaps status monitoring
The schematic flow sheet of method.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects described in detail in claims, the present invention.
Fig. 1 be according to an exemplary embodiment it is a kind of based on residual voltage monitor without arrester with series gaps state
The structural representation of monitoring system.The system can include arrester 1, ceramic condenser insulator, residual voltage monitoring device 2, transmission of electricity
Circuit, backstage arrester status monitoring center 3 and shaft tower.
In embodiments of the present invention, the side of the arrester 1 electrically connect with ultra-high-tension power transmission line, the arrester 1
Opposite side be electrically connected to ground, the ceramic condenser insulator includes the high-voltage arm C1 that is sequentially connected electrically and low-voltage arm C2, described
High-voltage arm C1 and low-voltage arm C2 are fixed on shaft tower, and the high-voltage arm C1 and low-voltage arm C2 are connected in ultra-high-tension power transmission line,
So as to form partial pressure unit；The ceramic condenser insulator can be that higfh-tension ceramics electric capacity is poured in epoxy resin or direct
The ceramic condenser insulator of the high insulation resistance being packaged in inside ceramic insulator, the ceramic condenser insulator includes that pin type is exhausted
Edge, pillar insulator, suspension insulator or porcelain pole arm formula insulator, can be according to scene in the Ceramics capacitive insulation period of the day from 11 p.m. to 1 a.m
Situation select the pin insulator, pillar insulator, suspension insulator and the porcelain pole arm formula insulator that match with infield its
In one kind, or, two or more combination.Wherein, in embodiments of the present invention, the arrester according to Fig. 2
Shown in the theory structure schematic diagram of condition monitoring system, the residual voltage monitoring device 2 includes the process of electricity-fetching module 21, voltage signal
Module 22, processor 23 and transport module 24, the electricity-fetching module 21 be respectively electrically connected to the voltage signal processing module 22,
Processor 23 and transport module 24, the processor 23 is electrically connected respectively with the voltage signal processing module 22 and transport module 24
Connect, the electricity-fetching module 21 is connected to the two ends of the ceramic condenser insulator low-voltage arm, and the processor 23 by described
Transport module 24 is communicated to connect with the backstage arrester condition monitoring center 3.
In embodiments of the present invention, the partial pressure unit of the high-voltage arm C1 and low-voltage arm C2 composition is mainly used in residual voltage monitoring
Device measures the voltage at low-voltage arm C2 two ends, so as to judging whether arrester 1 produces residual voltage.Wherein, in the embodiment of the present invention
In, the intrinsic standoff ratio between the high-voltage arm C1 and low-voltage arm C2 is 500-3000, and the capacitance of the high-voltage arm C1 can be
10pF-10nF, the capacitance of low-voltage arm C2 can be 10nF-10uF.
Wherein, in embodiments of the present invention, the residual voltage monitoring device 2 is connected to the two ends of low-voltage arm C2, and is installed on
On shaft tower, when system is normally run, the voltage that residual voltage monitoring device 2 is monitored is system phase voltage U (i.e. system voltage), works as prison
When measuring when magnitude of voltage is 1.2U or 1.5U or detecting the high-frequency signal containing 500Hz-2000Hz in voltage, then starting should
The mistake residual voltage waveform in voltage signal processing module record 100ms in residual voltage monitoring device 2, and transmitted to rear by transport module
Platform arrester condition monitoring center 3 carries out real-time judge to the state of arrester 1, wherein, if the mistake residual voltage of the 100ms of record
Waveform is unchanged, i.e., when voltage magnitude is unchanged, then arrester is unchanged.
In addition, in embodiments of the present invention, the electricity-fetching module in the residual voltage monitoring device 2 is set to electromagnetic transformer,
The voltage of low-voltage arm both sides is obtained by electromagnetic transformer sensing, and the transport module is GPRS module, bluetooth module
Or WIFI module, and corresponding backstage arrester status monitoring center 3 be also respectively provided with the GPRS module of matching, bluetooth module or
WIFI module, is easy to the residual voltage monitoring device 2 that the mistake residual voltage waveform for gathering is wirelessly transmitted to into the backstage arrester state
Monitoring center 3.
It is shown in Figure 3 to be supervised without arrester with series gaps state based on what residual voltage was monitored for provided in an embodiment of the present invention
The schematic flow sheet of survey method.As shown in figure 3, the method may include steps of：
In step S101, the ceramic condenser insulator low-voltage arm two ends of voltage signal processing module collection are obtained in real time
Voltage.
When voltage is got, in step s 102,20- is recorded according to the voltage starting over-voltage monitoring device
Over-voltage waveform in 100ms.
In specific implementation process, over-voltage monitoring device pair can be started by the frequency of the size of voltage and voltage
Over-voltage waveform is recorded, wherein it is possible to pass through to judge that whether the voltage be 1.2 times or 1.5 times of system voltage, or institute
State whether voltage includes the high-frequency signal of 500Hz-2000Hz to determine whether to start over-voltage monitoring device record 20-
Over-voltage waveform in 100ms.
In embodiments of the present invention, for system with effectively earthed neutral judges whether the voltage is system voltage
1.2 times, for system with non effectively earth ed neutral judges that whether the voltage be 1.5 times of system voltage, wherein, 1.2 times or
Also referred to as there is the voltage threshold size of residual voltage in 1.5 times of system voltage, so as to according to the size for judging magnitude of voltage and divide
In analysis voltage whether the high-frequency signal comprising 500Hz-2000Hz starting over-voltage monitoring device.Therefore, when the voltage is
1.2 times of system voltage or 1.5 times, or the voltage is when including the high-frequency signal of 500Hz-2000Hz, starts described excessively electric
Over-voltage waveform in pressure monitoring device record 20-100ms.
In step s 103, the over-voltage waveform of record is sent to backstage arrester status monitoring center, so as to
Judge the state of arrester.
In specific implementation process, backstage arrester status monitoring center is exceeding the specified residual voltage of arrester when Overvoltage Amplitude
When 0.5 times of amplitude, backstage arrester status monitoring center analysis process over-voltage waveform, calculate residual voltage value, residual voltage waveform
Rise time, hemiwave time, contrasted with standard residual voltage waveform, so as to judge the state of arrester, such as residual voltage value exceeds
Rated value, hemiwave time are extremely short, waveform exception etc. occurs and then thinks that arrester has exception.
In embodiments of the present invention, the schematic flow sheet of another kind of arrester state monitoring method shown in Fig. 4 is can be found in,
As shown in figure 4, step S103 can include following detailed step：
In step S1031, judge whether the Overvoltage Amplitude in over-voltage waveform exceedes the specified residual voltage amplitude of arrester
0.5 times.
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of arrester, in step S1032, the backstage is kept away
Thunder device status monitoring center calculates residual voltage value, the rise time of residual voltage waveform and hemiwave time according to the over-voltage waveform.
Otherwise, step S1031 is continued executing with.
Residual voltage waveform and action current waveform that backstage arrester status monitoring center 3 passes through analysis 20-100ms, calculate
Go out residual voltage value, the rise time of residual voltage waveform and hemiwave time, wherein action current peak value, action current can also be calculated
The parameters such as rise time, hemiwave time, the numerical value and calculated value obtained with test is compared analysis, and such as residual voltage value exceeds
Rated value, hemiwave time are extremely short, voltage waveform and current waveform exception etc. occur and then think that arrester 1 has exception.
In step S1033, judge the residual voltage value, the rise time of residual voltage waveform and hemiwave time whether beyond default
Value.
In embodiment of the present invention, residual voltage threshold value, the rising of residual voltage waveform that arrester 1 produces residual voltage can be pre-set
The hemiwave time threshold value of time threshold and residual voltage waveform, and the residual voltage threshold value, the rise time threshold value of residual voltage waveform and residual voltage
The hemiwave time threshold value of waveform is when producing exception according to arrester 1 for a long time there is the empirical value that residual voltage waveform draws.
When the residual voltage value, the rise time of residual voltage waveform and hemiwave time exceed preset value, in step S1034,
Determine that the arrester occurs abnormal.Otherwise continue executing with step S101.
Between the related embodiment of above-mentioned method can mutually referring to, it may be necessary to according to based on residual voltage monitoring
The embodiment of series gap arrester condition monitoring system is illustrated, and here is not elaborated.
Using shown in above-mentioned embodiment based on residual voltage monitor without arrester with series gaps condition monitoring system and
Method, the advantages of by using higfh-tension ceramics capacitive isolator dielectric strength height, good mechanical property, low price, with arrester
In parallel and directly hang on transmission line of electricity, complete and accurate ground record arrester crosses residual voltage waveform (such as residual voltage waveform and action time
Number), the state of arrester is judged using residual voltage value size, the rising of waveform, the change of fall time, so as to reach to keeping away online
The purpose of thunder device real-time monitoring.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice disclosure of the invention here
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (10)
1. it is a kind of based on residual voltage monitor without arrester with series gaps condition monitoring system, it is characterised in that including arrester,
Ceramic condenser insulator, residual voltage monitoring device and backstage arrester condition monitoring center, wherein：
The side of the arrester electrically connects with ultra-high-tension power transmission line, opposite side be electrically connected to ground；
The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, and the high-voltage arm and low-voltage arm are connected to
In ultra-high-tension power transmission line, and the high-voltage arm and low-voltage arm are fixed on shaft tower；
The residual voltage monitoring device includes electricity-fetching module, voltage signal processing module, processor and transport module, the power taking mould
Block is respectively electrically connected to the voltage signal processing module, processor and transport module, the processor respectively with the voltage
Signal processing module and transport module are electrically connected, and the electricity-fetching module is connected to the two of the ceramic condenser insulator low-voltage arm
Hold, and the processor is connected by the transport module with the backstage arrester condition monitoring center to center communications.
2. system according to claim 1, it is characterised in that the ceramic condenser insulator be set to pin insulator,
Pillar insulator, suspension insulator or porcelain pole arm formula insulator.
3. system according to claim 1, it is characterised in that the electricity-fetching module is set to electromagnetic transformer.
4. system according to claim 1, it is characterised in that the transport module be GPRS module, bluetooth module or
WIFI module.
5. system according to claim 1, it is characterised in that the intrinsic standoff ratio between the high-voltage arm and low-voltage arm is 500-
3000。
6. system according to claim 5, it is characterised in that the capacitance of the high-voltage arm is 10pF-10nF, described low
The capacitance of pressure arm is 10nF-10uF.
7. it is a kind of based on residual voltage monitor without arrester with series gaps state monitoring method, apply in residual voltage monitoring device,
Characterized in that, including：
The voltage at the ceramic condenser insulator low-voltage arm two ends of voltage signal processing module collection is obtained in real time；
Over-voltage waveform in 20-100ms is recorded according to the voltage starting over-voltage monitoring device；
By record the over-voltage waveform send to backstage arrester status monitoring center, so as to work as Overvoltage Amplitude exceed keep away
When 0.5 times of the specified residual voltage amplitude of thunder device, backstage arrester status monitoring center analysis process over-voltage waveform, calculate residual voltage
Value, the rise time of residual voltage waveform, hemiwave time, are contrasted to judge the state of arrester with standard residual voltage waveform.
8. method according to claim 7, it is characterised in that whether arrester state is judged according to the size of the voltage
Residual voltage is produced, including：
Judge that whether the voltage be 1.2 times or 1.5 times of system voltage, wherein, for system with effectively earthed neutral judges
Whether the voltage is 1.2 times of system voltage, for system with non effectively earth ed neutral judges whether the voltage is system
1.5 times of voltage；
When 1.2 times or 1.5 times that the voltage is system voltage, start the mistake in over-voltage monitoring device record 20-100ms
Voltage waveform.
9. method according to claim 7, it is characterised in that whether arrester state is judged according to the frequency of the voltage
Residual voltage is produced, including：
Judge the voltage whether high-frequency signal containing 500Hz-2000Hz；
When the high-frequency signal containing 500Hz-2000Hz in the voltage, start in over-voltage monitoring device record 20-100ms
Over-voltage waveform.
10. method according to claim 7, it is characterised in that the over-voltage waveform by record is sent to rear
Platform arrester status monitoring center, so that when Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of arrester, backstage is taken shelter from the thunder
Device status monitoring center analysis process over-voltage waveform, calculate residual voltage value, the rise time of residual voltage waveform, hemiwave time, with
Standard residual voltage waveform is contrasted to judge the state of arrester, including：
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of arrester, the backstage arrester status monitoring Central Radical
Residual voltage value, the rise time of residual voltage waveform and hemiwave time are calculated according to the over-voltage waveform；
Judge the residual voltage value, the rise time of residual voltage waveform and hemiwave time whether beyond preset value；
When the residual voltage value, the rise time of residual voltage waveform and hemiwave time exceed preset value, determine that the arrester occurs
It is abnormal.
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| CN107979080A (en) * | 2017-10-26 | 2018-05-01 | 中国电力科学研究院有限公司 | The definite method and apparatus of arrester rated voltage along half-wave power transmission circuit |
| CN109387745A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of power distribution network over-voltage sensing device |
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| CN112305347A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | MOA bypass type sampling total current measuring method |
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