CN108418304A - Substation secondary circuit state monitoring method, apparatus and system - Google Patents
Substation secondary circuit state monitoring method, apparatus and system Download PDFInfo
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- CN108418304A CN108418304A CN201810192803.XA CN201810192803A CN108418304A CN 108418304 A CN108418304 A CN 108418304A CN 201810192803 A CN201810192803 A CN 201810192803A CN 108418304 A CN108418304 A CN 108418304A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 127
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- 230000000875 corresponding effect Effects 0.000 description 11
- 230000005611 electricity Effects 0.000 description 11
- 230000011664 signaling Effects 0.000 description 7
- 238000005070 sampling Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000013500 data storage Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000004422 calculation algorithm Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 241001269238 Data Species 0.000 description 2
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- 238000009413 insulation Methods 0.000 description 2
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- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
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- 229910018503 SF6 Inorganic materials 0.000 description 1
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- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H02J13/0017—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
Abstract
The present invention is suitable for supervisory control of substation technical field, provides a kind of Substation secondary circuit state monitoring method, apparatus and system, the method includes：The electrical data of Substation secondary circuit is obtained from server, the electrical data of the Substation secondary circuit is acquired by multiple measuring units；Judge the electrical data of the Substation secondary circuit whether within the scope of default electrical quantity；If it is determined that the electrical data of the Substation secondary circuit then obtains the historical failure data of the Substation secondary circuit within the scope of default electrical quantity from the server；The electrical data of the Substation secondary circuit is matched with the historical failure data of the Substation secondary circuit, obtains the matching result of the Substation secondary circuit；According to the matching result, the working condition of the Substation secondary circuit is determined.It can avoid judging secondary circuit working condition by accident, and can be found that the incipient fault of secondary circuit.
Description
Technical field
The invention belongs to supervisory control of substation technical field more particularly to a kind of Substation secondary circuit state monitoring method,
Apparatus and system.
Background technology
The failure of current transformer substation secondary circuit happens occasionally, some can learn depositing for failure by monitoring system backstage
, and some are recessive, can not directly obtaining failure, there are situations, but these failure moment influence correlation first and second and set
Standby normal operation, moment threaten the safe and stable operation of power grid, and hidden failure is usually until it causes the accident circuit
Failure problems are just exposed, but late.Common secondary circuit failure has breaker control circuit broken string, remote signals
Exception, circuit-breaker-motor operation circuit, switch operation circuit breaking, secondary loop of mutual inductor broken string, voltage transformer two
The failures such as minor loop broken string, power supply broken string.These common secondary circuit failures, it is secondary that some are likely to result in relay protection etc.
The serious power grid accident such as the incorrect operation of equipment.When occurring huge information content from the background, O＆M operator on duty faces these
The probability that the information of magnanimity artificially goes wrong is increased by, to increase the probability of erroneous judgement.Moreover, many secondary circuit failures
It is the monitoring system of current transformer substation not finding, seriously threatens the normal operation of substation.
Invention content
In view of this, an embodiment of the present invention provides a kind of Substation secondary circuit state monitoring method, apparatus and system,
Erroneous judgement is susceptible to for secondary loop information and part secondary circuit failure monitoring system can not in the prior art with solution
The problem of finding in time.
To achieve the above object, the first aspect of the embodiment of the present invention provides a kind of Substation secondary circuit status monitoring
Method, including：
The electrical data of Substation secondary circuit, the electrical quantity number of the Substation secondary circuit are obtained from server
It is acquired according to by multiple measuring units；
Judge the electrical data of the Substation secondary circuit whether within the scope of default electrical quantity；
If it is determined that the electrical data of the Substation secondary circuit is being preset within the scope of electrical quantity, then from the server
The middle historical failure data for obtaining the Substation secondary circuit；
By the historical failure data of the electrical data of the Substation secondary circuit and the Substation secondary circuit into
Row matching, obtains the matching result of the Substation secondary circuit；
According to the matching result, the working condition of the Substation secondary circuit is determined.
Further, the electrical data that Substation secondary circuit is obtained from server, the substation secondary
The electrical data in circuit is acquired by multiple measuring units：
The magnitude of current data and/or voltage data of Substation secondary circuit, the substation two are obtained from server
The magnitude of current data of minor loop are acquired by multiple measuring units by current sensor, the voltage of the Substation secondary circuit
Data utilize potential test probe collection by multiple measuring units.
Further, the electrical data by the Substation secondary circuit and the Substation secondary circuit are gone through
History fault data is matched, and the matching result for obtaining the Substation secondary circuit includes：
According to the electrical data of the Substation secondary circuit, each monitoring point in the Substation secondary circuit is calculated
Electrical data average value within a preset period of time and variance；
According to the average value and the variance, determine that each monitoring point is in preset time in the Substation secondary circuit
Meet the probability density function of the electrical data of normal distribution in section；
According to the historical failure data of the Substation secondary circuit, each monitoring in the secondary circuit to break down is calculated
Put the electrical data average value at each moment within a preset period of time；
According to formulaThe change for calculating the Substation secondary circuit and breaking down
The matching value of power station secondary circuit, F is matching value in formula, and t is preset time period, and k is to be monitored in the Substation secondary circuit
The number of point, n are the number that same monitoring point acquires electrical data in preset time period t, MtFor the substation secondary
Circuit is in the electrical data at same monitoring point each moment in preset time period t, MμSecondary circuit to break down exists
The electrical data average value at same monitoring point each moment in preset time period t, f (x) are the Substation secondary circuit
In each monitoring point meet in preset time period t normal distribution electrical data probability density function.
Further, the Substation secondary circuit state monitoring method further includes：
If it is determined that the electrical data of the Substation secondary circuit is not within the scope of default electrical quantity, it is determined that the change
The working condition of power station secondary circuit is abnormal.
Further, the Substation secondary circuit state monitoring method further includes：
If it is determined that the working condition of the Substation secondary circuit is abnormal, then by the electrical quantity of the Substation secondary circuit
In data storage to the historical failure data of the Substation secondary circuit.
The second aspect of the embodiment of the present invention provides a kind of Substation secondary circuit state monitoring apparatus, including：
First acquisition module, the electrical data for obtaining Substation secondary circuit from server, the substation
The electrical data of secondary circuit is acquired by multiple measuring units；
Judgment module, for judging the electrical data of the Substation secondary circuit whether in default electrical quantity range
It is interior；
Second acquisition module is used for if it is determined that the electrical data of the Substation secondary circuit is in default electrical quantity range
It is interior, then the historical failure data of the Substation secondary circuit is obtained from the server；
Matching module, for going through the electrical data of the Substation secondary circuit and the Substation secondary circuit
History fault data is matched, and the matching result of the Substation secondary circuit is obtained；
Working condition determining module, for according to the matching result, determining the work shape of the Substation secondary circuit
State.
Further, first acquisition module includes：
Data acquisition module, magnitude of current data and/or voltage for obtaining Substation secondary circuit from server
The magnitude of current data of data, the Substation secondary circuit are acquired by multiple measuring units by current sensor, the power transformation
Stand secondary circuit voltage data by multiple measuring units utilize potential test probe collection.
Further, the matching module includes：
First computing module calculates the substation two for the electrical data according to the Substation secondary circuit
Each monitoring point electrical data average value within a preset period of time and variance in minor loop；
Probability density function determining module, for according to the average value and the variance, determining the substation secondary
Each monitoring point meets the probability density function of the electrical data of normal distribution within a preset period of time in circuit；
Second computing module breaks down for according to the historical failure data of the Substation secondary circuit, calculating
The electrical data average value at each monitoring point each moment within a preset period of time in secondary circuit；
Third computing module, for according to formulaThe substation secondary is calculated to return
Road and the matching value of Substation secondary circuit to break down, F is matching value in formula, and t is preset time period, and k is the power transformation
It stands the number of monitoring point in secondary circuit, n is the number that same monitoring point acquires electrical data in preset time period t, Mt
It is the Substation secondary circuit in the electrical data at same monitoring point each moment in preset time period t, MμTo occur
Electrical data average value of the secondary circuit of failure at same monitoring point each moment in preset time period t, f (x) are institute
State the probability density that each monitoring point in Substation secondary circuit meets the electrical data of normal distribution in preset time period t
Function.
The third aspect of the embodiment of the present invention provides a kind of Substation secondary circuit condition monitoring system, including：
Multiple measuring units, the electrical data for acquiring Substation secondary circuit, and it is sent to server；
Server, the electrical data for receiving the Substation secondary circuit that each measuring unit is sent, and deposit
Store up the historical failure data of secondary circuit in substation；
Host, the electrical data for obtaining Substation secondary circuit from server；Judge the substation secondary
Whether the electrical data in circuit is within the scope of default electrical quantity；If it is determined that the electrical data of the Substation secondary circuit exists
Within the scope of default electrical quantity, then the historical failure data of the Substation secondary circuit is obtained from the server；It will be described
The electrical data of Substation secondary circuit is matched with the historical failure data of the Substation secondary circuit, described in acquisition
The matching result of Substation secondary circuit；According to the matching result, the working condition of the Substation secondary circuit is determined.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, the computer program to be performed the Substation secondary circuit shape for realizing above-mentioned first aspect
State monitoring method.
Existing advantageous effect is the embodiment of the present invention compared with prior art：Substation is acquired using multiple measuring units
The electrical data of secondary circuit, and be sent to server and stored, the electricity of Substation secondary circuit is obtained from server
Tolerance data, by judging that electrical data whether within the scope of default electrical quantity, can primarily determine whether secondary circuit is sent out
Raw failure, can effectively avoid when secondary loop information amount is excessive, to secondary circuit working condition, there is a phenomenon where judge by accident；It will
The electrical data of secondary circuit is matched with the historical failure data of secondary circuit, can be according to a large amount of data information pair
The working condition of secondary circuit carries out discriminatory analysis, finds the incipient fault of secondary circuit, operation maintenance personnel is facilitated to be handled, have
Conducive to the normal operation of substation.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of schematic flow diagram of Substation secondary circuit state monitoring method provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic block diagram of Substation secondary circuit state monitoring apparatus provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of Substation secondary circuit condition monitoring system provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation for Substation secondary circuit condition monitoring system that another embodiment of the present invention provides
Figure；
Fig. 5 is a kind of structural schematic diagram of data store organisation provided in an embodiment of the present invention.
Specific implementation mode
In being described below, for illustration and not for limitation, it is proposed that such as tool of particular system structure, technology etc
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention can also be realized in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Referring to Fig.1, first aspect of the embodiment of the present invention provides a kind of Substation secondary circuit state monitoring method, including：
S101 obtains the electrical data of Substation secondary circuit, the electricity of the Substation secondary circuit from server
Tolerance data are acquired by multiple measuring units.
Specifically, numerous measuring units is distributed in each protective chamber, breaker on-site control and open air of substation
The positions such as terminal box, may be implemented the electrical data acquisition to each secondary circuit in substation, and measuring unit will collect
Electrical data stored and be transmitted to server.As a kind of specifically embodiment, measuring unit is directed to of ac
Sample frequency be each frequency cycle acquire 24 point datas, it is per second to acquire 1200 point datas, for DC loop acquire
Electrical data be mainly voltage data, i.e. the data information of above earth potential value, sample frequency is 600 point data per second.
Measuring unit stores the electrical data of collected secondary circuit, and passes through interchanger or wireless biography
Electrical data is sent to the server on backstage by defeated mode, and host has communication interface with server, and host can be from clothes
It is engaged in obtaining the electrical data of Substation secondary circuit in device.
Furthermore, it is possible to according to actual needs, selective enumeration method, peace of some secondary circuits to system be carried out to secondary circuit
Full stable operation is insignificant, some secondary circuits are stable, and the probability to break down is extremely low, such secondary circuit,
There is no necessity of on-line real time monitoring, therefore measuring unit need not be accessed and carry out real time on-line monitoring.And some secondary circuits
Real time on-line monitoring is then needed, for example, the current value monitoring (including neutral conductor) of each exchange secondary circuit of current transformer, electricity
Press the potential value monitoring (including center line) of each exchange secondary circuit of mutual inductor；Circuit-breaker switching on-off coil is negative to control power supply
The monitoring of the direct current place value of the related secondary circuit of pole and breaker operation cabinet are to secondary returning between circuit-breaker switching on-off coil
The monitoring of the direct current place value on road；Breaker non-three phase starts, acts the direct current place value of the related secondary circuit of outlet tripping
Monitoring；Breaker suppresses the monitoring of the associated ACs, direct-current secondary circuit potential value such as control startup, AC power of motor circuit；
The monitoring of the associated ACs such as switch operation control loop, AC power of motor circuit, direct-current secondary circuit potential value；It is active air-cooled
The monitoring for starting control loop correlation direct current, exchanging secondary circuit potential value；Breaker heating, lighting loop etc. exchange secondary returning
The monitoring of road current potential, current value；Prison of the fault oscillograph about secondary circuits potential values such as circuit breaker position, non-three phase actions
It surveys；Main transformer non-charge protects main transformer body to the monitoring of related non electrical quantity direct-current secondary circuit potential value between protective device；It is disconnected
The monitoring of road device, disconnecting link position remote signals direct-current secondary circuit potential value；Voltage transformer terminal box, voltage transformer secondary
Break remote signalling direct-current secondary circuit, the monitoring of extraction voltage mutual inductor secondary voltage Loss, relay exchange secondary circuit potential value
Monitoring；The monitoring of lock-reclosing lock control direct-current secondary circuit potential value in breaker control circuit；Related various kinds of equipment sheet
Body mechanism, the sulfur hexafluoride (SF of Cubicle Gas-Insulated Switchgear (GAS insulated SWITCHGEAR, GIS)6)
The monitoring of the remote signalling alarm signal direct-current secondary circuit such as alarm, operating pressure locking, main transformer body potential value；Transforming plant DC point
The monitoring of each direct current branch potential value of electric screen；And other each station concrete conditions need the secondary circuit of special surveillance.
Whether S102 judges the electrical data of the Substation secondary circuit within the scope of default electrical quantity.
Specifically, judge electrical quantity after the electrical data for obtaining Substation secondary circuit in server in host
Whether within the scope of default electrical quantity, default electrical quantity range here is configured data according to actual conditions, according to
Different electrical quantity ranges is arranged in different secondary circuits, if the electrical data of secondary circuit is being preset within the scope of electrical quantity,
Then the working condition of the preliminary judgement secondary circuit is normal, and carries out subsequent detection, judges whether incipient fault, if secondary
The electrical data in circuit then judges that the working condition of the secondary circuit is abnormal, secondary circuit not within the scope of default electrical quantity
There are failures.
When realizing step S102, the syntax rule that the expression formula in Artificial Intelligence may be used is stated.It is first
Constraints before this, followed by state variable, followed by result.Conclusion between interrelated can gradual recurrence, to real
The function of existing reasoning from logic.As a kind of specific embodiment, when breaker normal operation, divide-shut brake coil to all kinds of pressure
The above earth potential for being latched the corresponding monitoring point in divide-shut brake circuit of contact is between -100V~-120V.So its constraints is
Circuit breaker position and breaker press contact monitor potential value, and variable is divide-shut brake coil to the control loop state between negative electricity
A, the result is that A=TURE indicates that control loop state is intact, A=FALSE indicates that control loop is abnormal.It is indicated using artificial intelligence
Method can be：
IF-120≤press contact monitoring current potential ＜ -100 AND breakers=conjunction position,
THEN A=TRUE,
ELSE A=FALSE.
S103, if it is determined that the electrical data of the Substation secondary circuit is being preset within the scope of electrical quantity, then from described
The historical failure data of the Substation secondary circuit is obtained in server.
It specifically, then can be preliminary if it is determined that the electrical data of Substation secondary circuit is within the scope of default electrical quantity
Think that the working condition of the secondary circuit is normal, host obtains the historical failure data of Substation secondary circuit from server,
According to historical failure data, further judge that secondary circuit whether there is incipient fault.
S104, by the historical failure number of the electrical data of the Substation secondary circuit and the Substation secondary circuit
According to being matched, the matching result of the Substation secondary circuit is obtained.
Specifically, by the electrical data of Substation secondary circuit and the historical failure data of Substation secondary circuit according to
Certain algorithm is matched, and obtains corresponding matching result, matching result here can be being calculated according to algorithm
With value.
As a kind of specifically embodiment, it is first determined the type at the interval belonging to secondary circuit, then by secondary returning
The electrical data on road and the historical failure data of the same type secondary circuit in same type interval carry out matching comparison, obtain
To corresponding matching result.
S105 determines the working condition of the Substation secondary circuit according to the matching result.
Specifically, the matching result analyzed according to actual conditions, is inferred to the working condition of secondary circuit, if obtaining
Matching result when being determining matching value, then can according to different types of secondary circuit and different fault types, if
Matching tolerance value is set, when the matching value is more than matching tolerance value, illustrates that secondary circuit is similar to the secondary circuit to break down
It spends low, it is believed that the secondary circuit working condition is normal, when the matching value is not more than matching tolerance value, illustrates secondary circuit and hair
The secondary circuit similarity of raw failure is higher, it is believed that the secondary circuit working condition is abnormal, and host is sent out for the secondary circuit
Warning information, warning information include location information and fault message of secondary circuit etc..
When not can determine that the fault type that whether secondary circuit breaks down and secondary circuit occurs, can hold successively
Row step S101-S105, to determine the working condition of secondary circuit, working condition mentioned here include working condition it is normal,
The information such as working condition exception, abort situation and fault type.In addition, if host can get two from monitoring system of electric substation
The fault type that minor loop occurs can execute step S101 and S102, really successively if connectivity fault occurs for secondary circuit
Determine the fault message of secondary circuit, if Information abnormity failure occurs for secondary circuit, executes step S101-S105 successively, come
Determine the fault message of secondary circuit.Such as circuit-breaker switching on-off circuit belongs to connectivity fault extremely, can directly pass through step
Rapid S101 and S102, determines divide-shut brake coil to the relevant information of the secondary circuit exception between negative electricity.DC ground fault category
It in Information abnormity failure, needs to execute step S101-S105 successively, to determine the related letter of secondary circuit DC ground fault
Breath.
Existing advantageous effect is the embodiment of the present invention compared with prior art：Substation is acquired using multiple measuring units
The electrical data of secondary circuit, and be sent to server and stored, the electricity of Substation secondary circuit is obtained from server
Tolerance data, by judging that electrical data whether within the scope of default electrical quantity, can primarily determine whether secondary circuit is sent out
Raw failure, can effectively avoid when secondary loop information amount is excessive, to secondary circuit working condition, there is a phenomenon where judge by accident；It will
The electrical data of secondary circuit is matched with the historical failure data of secondary circuit, can be according to a large amount of data information pair
The working condition of secondary circuit carries out discriminatory analysis, finds the incipient fault of secondary circuit, operation maintenance personnel is facilitated to be handled, have
Conducive to the normal operation of substation.
Further, the electrical data that Substation secondary circuit is obtained from server, the substation secondary
The electrical data in circuit is acquired by multiple measuring units：
The magnitude of current data and/or voltage data of Substation secondary circuit, the substation two are obtained from server
The magnitude of current data of minor loop are acquired by multiple measuring units by current sensor, the voltage of the Substation secondary circuit
Data utilize potential test probe collection by multiple measuring units.
Specifically, the electrical data of secondary circuit includes magnitude of current data and voltage data, in electrical data
Primarily directed to the ac flow information of secondary circuit, it is sensed by offset-type Hall current for the acquisition of magnitude of current data
Device is acquired.Offset-type Hall sensor is mainly used for exchange secondary circuit, power comprising current transformer
Exchange secondary circuit (such as motor suppresses circuit, switch operation circuit, heating lighting loop) obtains correlated current numerical information.
The output end of offset-type Hall current sensor is connect with measuring unit, so as to make measuring unit complete respective electric amount number
According to acquisition.Voltage data in electrical data primarily directed to the direct current of each secondary circuit, ac voltage circuit over the ground
The data information of potential value is acquired, and the gatherer process of voltage data is to visit the potential test drawn in measuring unit
Needle is connected on the secondary wiring terminals in the circuit for needing to acquire, to make measuring unit obtain the number of the secondary circuit potential value
It is believed that breath.
Further, the electrical data by the Substation secondary circuit and the Substation secondary circuit are gone through
History fault data is matched, and the matching result for obtaining the Substation secondary circuit includes：
According to the electrical data of the Substation secondary circuit, each monitoring point in the Substation secondary circuit is calculated
Electrical data average value within a preset period of time and variance；
According to the average value and the variance, determine that each monitoring point is in preset time in the Substation secondary circuit
Meet the probability density function of the electrical data of normal distribution in section；
According to the historical failure data of the Substation secondary circuit, each monitoring in the secondary circuit to break down is calculated
Put the electrical data average value at each moment within a preset period of time；
According to formulaThe change for calculating the Substation secondary circuit and breaking down
The matching value of power station secondary circuit, F is matching value in formula, and t is preset time period, and k is to be monitored in the Substation secondary circuit
The number of point, n are the number that same monitoring point acquires electrical data in preset time period t, MtFor the substation secondary
Circuit is in the electrical data at same monitoring point each moment in preset time period t, MμSecondary circuit to break down exists
The electrical data average value at same monitoring point each moment in preset time period t, f (x) are the Substation secondary circuit
In each monitoring point meet in preset time period t normal distribution electrical data probability density function.
Specifically, by taking DC ground fault is analyzed as an example, DC ground fault occurs within front and back one minute of the moment, electricity
The temporal variations of tolerance are most apparent, and fault message feature is most abundant, therefore host obtains secondary circuit from server and occurs directly
Flow the historical failure data in front and back one minute of earth fault.The direct-current secondary of same type in same type interval is returned
Road meets normal distribution in the voltage value of the data sampling time section of a certain monitoring point.According to the electrical data of secondary circuit,
Mean value computation formulaWith variance calculation formulaA certain monitoring point can be calculated to exist
Average value in preset time period and variance, may further be according to the formula of probability density function of normal distributionDetermine the probability density function of the monitoring point within a preset period of time.Here historical failure data
Include the fault data of a plurality of secondary circuit to break down, and the secondary circuit to break down and the matched secondary returning of needs
Road type is identical, therefore the number of the number with monitoring point and the electrical data of each monitoring point acquisition is identical, according to
The fault data of a plurality of secondary circuit to break down, it may be determined that electrical data of each monitoring point in each sampling instant
Average value is not difficult to find out that a sampling instant corresponds to an electrical data here.
According to formulaCalculate of secondary circuit and the secondary circuit to break down
With value, F is matching value in formula, and t is preset time period, and k is the number of monitoring point in Substation secondary circuit, and n is same monitoring
Point acquires the number of electrical data, M in preset time period ttFor Substation secondary circuit in same monitoring point when default
Between in section t each moment electrical data, MμFor the secondary circuit that breaks down in same monitoring point in preset time period t
The electrical data average value at each moment, f (x) are that each monitoring point accords in preset time period t in Substation secondary circuit
The probability density function of the electrical data of normal distribution is closed, the variable x correspondences in f (x) are exactly Mt.Each monitoring is utilized in this way
The fault data average value of point each practical electrical data measured of sampling instant and the corresponding sampling instant of corresponding monitoring point
It makes the difference, and is multiplied by the probability of the electrical data actually measured, seek absolute value later, the electrical quantity number actually measured can be embodied
According to fault data a certain sampling instant of a certain monitoring point similarity degree, finally by the obtained matching value of adding up twice
F can reflect that the similarity degree of secondary circuit to be measured and the secondary circuit to break down, matching value F here can reflect
The probability that secondary circuit breaks down can also further determine the work of secondary circuit to be measured according to the size of matching value F
State can effectively find the incipient fault of secondary circuit, provide decision-making foundation.
Earth fault, the electrical quantity at institute's performance are occurred for the secondary circuit of the same type in same type interval
Information characteristics may be not only identical, fault condition variable can be further set, reduce and carry out matched fault data
Sample space keeps matching result more accurate.For example, variable B indicates ground voltage value, including anode and cathode two categories,
"+" is expressed as direct-flow positive pole ground connection, and "-" is expressed as direct current cathode ground connection, DC earthing voltage value is divided into three sections：0
≤ B≤10V, 10<B≤40V, 40<B≤90V.
Matching tolerance value can be set, when the matching according to different types of secondary circuit and different fault types
When value is more than matching tolerance value, illustrate that secondary circuit is low with the secondary circuit similarity to break down, it is believed that the secondary circuit work
It is normal to make state, when the matching value is not more than matching tolerance value, illustrates that secondary circuit is similar to the secondary circuit to break down
Degree is higher, it is believed that the secondary circuit working condition is abnormal, and host sends out warning information for the secondary circuit, wrapped in warning information
Include location information and the fault message etc. of secondary circuit.
Further, the Substation secondary circuit state monitoring method further includes：
If it is determined that the electrical data of the Substation secondary circuit is not within the scope of default electrical quantity, it is determined that the change
The working condition of power station secondary circuit is abnormal.
Specifically, by taking breaker control circuit as an example, when breaker normal operation, divide-shut brake coil to all kinds of pressure
The above earth potential of the corresponding monitoring point in divide-shut brake circuit of contact is latched between -100V~-120V, otherwise, divide-shut brake coil
It is abnormal to the secondary control loop between negative electricity；When breaker is in closing position, the phase of closing coil to breaker operation cabinet
Answer monitoring point potential value between+100V~+120V, the corresponding monitoring point potential value of switching winding to breaker operation cabinet-
100V~-120V, when breaker is in open position, the corresponding monitoring point potential value of closing coil to breaker operation cabinet -
Between 100V~-120V, the corresponding monitoring point potential value of switching winding to breaker operation cabinet is in+100V~+120V, otherwise table
Bright divide-shut brake coil is abnormal to the associated control circuitry between breaker operation cabinet.
By taking the remote signalling of all kinds of breakers, disconnecting switch position instruction as an example, when remote signalling position associated contacts are connected, conducting
Potential difference between two secondary circuits of contact is between 0~10V, its potential difference is about in 135~145V when contact disconnects
Between.If its potential difference not herein within the scope of, show that remote signalling secondary circuit is abnormal.It is learnt from the operating experience at scene,
When the insulation of the auxiliary contact of position instruction goes wrong when cannot reliably disconnect, potential difference is 90V or so, while adjoint
Phenomenon of the failure be variation repeatedly that monitoring system of electric substation backstage frequently occurs position of components instruction, and do not change actually
Become.Such case is in remote signals, transformer non-electricity action, breaker, the remote signalling of disconnecting switch position such as gas pressure alarms
The frequent movement of monitoring system information, involution phenomenon is caused to happen occasionally Deng because of all kinds of contact Insulation Problems.In addition, when straight
After stream remote signalling instruction circuit seals in power AC power, potential difference is about 100V or so.Therefore, pass through the survey of potential difference
Amount can monitor the operating status of related secondary circuit.
Further, the Substation secondary circuit state monitoring method further includes：
If it is determined that the working condition of the Substation secondary circuit is abnormal, then by the electrical quantity of the Substation secondary circuit
In data storage to the historical failure data of the Substation secondary circuit.
Specifically, however, it is determined that the working condition of secondary circuit is abnormal, then stores the electrical data of secondary circuit to going through
In history fault data, realize that the accumulation and update of historical failure data, accident analysis that can be for after provide decision support.
As shown in Fig. 2, the second aspect of the embodiment of the present invention provides a kind of Substation secondary circuit state monitoring apparatus,
Including：
First acquisition module 201, the electrical data for obtaining Substation secondary circuit from server, the power transformation
The electrical data of secondary circuit of standing is acquired by multiple measuring units；
Judgment module 202, for judging the electrical data of the Substation secondary circuit whether in default electrical quantity model
In enclosing；
Second acquisition module 203 is used for if it is determined that the electrical data of the Substation secondary circuit is in default electrical quantity
In range, then the historical failure data of the Substation secondary circuit is obtained from the server；
Matching module 204 is used for the electrical data of the Substation secondary circuit and the Substation secondary circuit
Historical failure data matched, obtain the matching result of the Substation secondary circuit；
Working condition determining module 205, for according to the matching result, determining the work of the Substation secondary circuit
State.
Further, first acquisition module 201 includes：
Data acquisition module, magnitude of current data and/or voltage for obtaining Substation secondary circuit from server
The magnitude of current data of data, the Substation secondary circuit are acquired by multiple measuring units by current sensor, the power transformation
Stand secondary circuit voltage data by multiple measuring units utilize potential test probe collection.
Further, the matching module 204 includes：
First computing module calculates the substation two for the electrical data according to the Substation secondary circuit
Each monitoring point electrical data average value within a preset period of time and variance in minor loop；
Probability density function determining module, for according to the average value and the variance, determining the substation secondary
Each monitoring point meets the probability density function of the electrical data of normal distribution within a preset period of time in circuit；
Second computing module breaks down for according to the historical failure data of the Substation secondary circuit, calculating
The electrical data average value at each monitoring point each moment within a preset period of time in secondary circuit；
Third computing module, for according to formulaThe substation secondary is calculated to return
Road and the matching value of Substation secondary circuit to break down, F is matching value in formula, and t is preset time period, and k is the power transformation
It stands the number of monitoring point in secondary circuit, n is the number that same monitoring point acquires electrical data in preset time period t, Mt
It is the Substation secondary circuit in the electrical data at same monitoring point each moment in preset time period t, MμTo occur
Electrical data average value of the secondary circuit of failure at same monitoring point each moment in preset time period t, f (x) are institute
State the probability density that each monitoring point in Substation secondary circuit meets the electrical data of normal distribution in preset time period t
Function.
Further, Substation secondary circuit state monitoring apparatus further includes：
Working condition exception determining module is used for if it is determined that the electrical data of the Substation secondary circuit is not default
Within the scope of electrical quantity, it is determined that the working condition of the Substation secondary circuit is abnormal.
Further, Substation secondary circuit state monitoring apparatus further includes：
Memory module is used for if it is determined that the working condition of the Substation secondary circuit is abnormal, then by the substation two
In the electrical data storage to the historical failure data of the Substation secondary circuit of minor loop.
As shown in figure 3, the third aspect of the embodiment of the present invention provides a kind of Substation secondary circuit condition monitoring system,
Including：
Multiple measuring units 303, the electrical data for acquiring Substation secondary circuit, and it is sent to server 302；
Server 302, the electrical quantity number of the Substation secondary circuit for receiving the transmission of each measuring unit 303
According to, and store the historical failure data of secondary circuit in substation；
Host 301, the electrical data for obtaining Substation secondary circuit from server 302；Judge the power transformation
Stand secondary circuit electrical data whether within the scope of default electrical quantity；If it is determined that the electrical quantity of the Substation secondary circuit
Data then obtain the historical failure number of the Substation secondary circuit within the scope of default electrical quantity from the server 302
According to；By the electrical data of the Substation secondary circuit and the progress of the historical failure data of the Substation secondary circuit
Match, obtains the matching result of the Substation secondary circuit；According to the matching result, the Substation secondary circuit is determined
Working condition.
Specifically, it as shown in figure 4, measuring unit 303 can also be connected by two switch-to-servers 302, measures
Electrical data is transferred to second level interchanger by unit 303 by first order interchanger first, and second level interchanger plays bridge
The effect for connecing and summarizing, multiple first order interchangers are connect with second level interchanger, the electrical data that can will be received
Summarized, and is transferred to server 302.
As shown in figure 5, data in server 302 are stored to be divided into basic unit, all data are in inhomogeneity
It is divided with different equipment (this spacing terminal case, convergence control cabinet or mechanism body etc.) under the interval of type, later again with the equipment
Different secondary loop observation points are divided, and each monitoring point forms original data object.Overall data structure forming layer
The tree structure model that layer contains, data object contain data attribute and objects services.The data knot stored in server 302
For structure based on this structure, the monitoring system backstage with substation is also carried out data communication service by host 301 simultaneously, is usually supervised
The back-end data storage of control system is also therefore host 301 and monitoring system backstage to be divided into what basic unit was stored
Data communication can also be spaced as main inquiry mode, and be easy to update the Various types of data read from server 302, just
In the use of system.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, the computer program to be performed the Substation secondary circuit shape for realizing above-mentioned first aspect
State monitoring method.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each work(
Can unit, module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device are divided into different functional units or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
It, can also be above-mentioned integrated during two or more units are integrated in one unit to be that each unit physically exists alone
The form that hardware had both may be used in unit is realized, can also be realized in the form of SFU software functional unit.In addition, each function list
Member, the specific name of module are also only to facilitate mutually distinguish, the protection domain being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
Those of ordinary skill in the art may realize that lists described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, depends on the specific application and design constraint of technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device and method can pass through others
Mode is realized.For example, system embodiment described above is only schematical, for example, the division of the module or unit,
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can be with
In conjunction with or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or
Communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can be stored in a computer read/write memory medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of flow in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
May include：Any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic of the computer program code can be carried
Dish, CD, computer storage, read-only memory (Read-Only Memory, ROM), random access memory (Random
Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that the meter
The content that calculation machine readable medium includes can carry out increase and decrease appropriate according to legislation in jurisdiction and the requirement of patent practice,
Such as in certain jurisdictions, according to legislation and patent practice, computer-readable medium is including being not electric carrier signal and electricity
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to aforementioned reality
Applying example, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each
Technical solution recorded in embodiment is modified or equivalent replacement of some of the technical features；And these are changed
Or replace, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of Substation secondary circuit state monitoring method, which is characterized in that including：
Obtain the electrical data of Substation secondary circuit from server, the electrical data of the Substation secondary circuit by
Multiple measuring unit acquisitions；
Judge the electrical data of the Substation secondary circuit whether within the scope of default electrical quantity；
If it is determined that the electrical data of the Substation secondary circuit is then obtained from the server within the scope of default electrical quantity
Take the historical failure data of the Substation secondary circuit；
By the electrical data of the Substation secondary circuit and the progress of the historical failure data of the Substation secondary circuit
Match, obtains the matching result of the Substation secondary circuit；
According to the matching result, the working condition of the Substation secondary circuit is determined.
2. Substation secondary circuit state monitoring method according to claim 1, which is characterized in that described from server
The electrical data of Substation secondary circuit is obtained, the electrical data of the Substation secondary circuit is adopted by multiple measuring units
Collection includes：
The magnitude of current data and/or voltage data of Substation secondary circuit are obtained from server, the substation secondary returns
The magnitude of current data on road are acquired by multiple measuring units by current sensor, the voltage data of the Substation secondary circuit
Potential test probe collection is utilized by multiple measuring units.
3. Substation secondary circuit state monitoring method according to claim 1, which is characterized in that described by the power transformation
The electrical data of secondary circuit of standing is matched with the historical failure data of the Substation secondary circuit, obtains the power transformation
The matching result of secondary circuit of standing includes：
According to the electrical data of the Substation secondary circuit, each monitoring point is calculated in the Substation secondary circuit pre-
If the electrical data average value in the period and variance；
According to the average value and the variance, determine that each monitoring point is within a preset period of time in the Substation secondary circuit
Meet the probability density function of the electrical data of normal distribution；
According to the historical failure data of the Substation secondary circuit, calculates each monitoring point in the secondary circuit to break down and exist
The electrical data average value at each moment in preset time period；
According to formulaThe substation two for calculating the Substation secondary circuit and breaking down
The matching value of minor loop, F is matching value in formula, and t is preset time period, and k is of monitoring point in the Substation secondary circuit
Number, n are the number that same monitoring point acquires electrical data in preset time period t, MtExist for the Substation secondary circuit
The electrical data at same monitoring point each moment in preset time period t, MμIt is the secondary circuit that breaks down in same prison
The electrical data average value at measuring point each moment in preset time period t, f (x) are each in the Substation secondary circuit
Monitoring point meets the probability density function of the electrical data of normal distribution in preset time period t.
4. Substation secondary circuit state monitoring method according to claim 1, which is characterized in that further include：
If it is determined that the electrical data of the Substation secondary circuit is not within the scope of default electrical quantity, it is determined that the substation
The working condition of secondary circuit is abnormal.
5. Substation secondary circuit state monitoring method according to claim 4, which is characterized in that further include：
If it is determined that the working condition of the Substation secondary circuit is abnormal, then by the electrical data of the Substation secondary circuit
In the historical failure data for storing the Substation secondary circuit.
6. a kind of Substation secondary circuit state monitoring apparatus, which is characterized in that including：
First acquisition module, the electrical data for obtaining Substation secondary circuit from server, the substation secondary
The electrical data in circuit is acquired by multiple measuring units；
Judgment module, for judging the electrical data of the Substation secondary circuit whether within the scope of default electrical quantity；
Second acquisition module is used for if it is determined that the electrical data of the Substation secondary circuit is within the scope of default electrical quantity,
The historical failure data of the Substation secondary circuit is then obtained from the server；
Matching module is used for the electrical data of the Substation secondary circuit and the event of the history of the Substation secondary circuit
Barrier data are matched, and the matching result of the Substation secondary circuit is obtained；
Working condition determining module, for according to the matching result, determining the working condition of the Substation secondary circuit.
7. Substation secondary circuit state monitoring apparatus according to claim 6, which is characterized in that described first obtains mould
Block includes：
Data acquisition module, magnitude of current data and/or voltage data for obtaining Substation secondary circuit from server,
The magnitude of current data of the Substation secondary circuit are acquired by multiple measuring units by current sensor, the substation secondary
The voltage data in circuit utilize potential test probe collection by multiple measuring units.
8. Substation secondary circuit state monitoring apparatus according to claim 7, which is characterized in that the matching module packet
It includes：
First computing module calculates the substation secondary and returns for the electrical data according to the Substation secondary circuit
Each monitoring point electrical data average value within a preset period of time and variance in road；
Probability density function determining module, for according to the average value and the variance, determining the Substation secondary circuit
In each monitoring point meet within a preset period of time normal distribution electrical data probability density function；
Second computing module, for according to the historical failure data of the Substation secondary circuit, calculate break down it is secondary
The electrical data average value at each monitoring point each moment within a preset period of time in circuit；
Third computing module, for according to formulaCalculate the Substation secondary circuit with
The matching value of the Substation secondary circuit to break down, F is matching value in formula, and t is preset time period, and k is the substation two
The number of monitoring point in minor loop, n are the number that same monitoring point acquires electrical data in preset time period t, MtFor institute
Substation secondary circuit is stated in the electrical data at same monitoring point each moment in preset time period t, MμTo break down
Electrical data average value of the secondary circuit at same monitoring point each moment in preset time period t, f (x) is the change
Each monitoring point meets the probability density letter of the electrical data of normal distribution in preset time period t in the secondary circuit of power station
Number.
9. a kind of Substation secondary circuit condition monitoring system, which is characterized in that including：
Multiple measuring units, the electrical data for acquiring Substation secondary circuit, and it is sent to server；
Server, the electrical data for receiving the Substation secondary circuit that each measuring unit is sent, and store change
The historical failure data of secondary circuit in power station；
Host, the electrical data for obtaining Substation secondary circuit from server；Judge the Substation secondary circuit
Electrical data whether within the scope of default electrical quantity；If it is determined that the electrical data of the Substation secondary circuit is default
Within the scope of electrical quantity, then the historical failure data of the Substation secondary circuit is obtained from the server；By the power transformation
The electrical data of secondary circuit of standing is matched with the historical failure data of the Substation secondary circuit, obtains the power transformation
It stands the matching result of secondary circuit；According to the matching result, the working condition of the Substation secondary circuit is determined.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, feature to exist
In the computer program is performed realization Substation secondary circuit status monitoring as described in claim 1 to 5 any one
The step of method.
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| CN112800637A (en) * | 2021-04-12 | 2021-05-14 | 广东工业大学 | Intelligent substation simulation test device and method |
| CN113484646A (en) * | 2021-07-21 | 2021-10-08 | 国网河北省电力有限公司检修分公司 | Transformer substation secondary circuit complex fault positioning device and diagnosis method |
| CN113514692A (en) * | 2021-07-16 | 2021-10-19 | 国网江苏省电力有限公司检修分公司 | Transformer substation secondary circuit node voltage monitoring device |
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| CN109523042A (en) * | 2018-12-04 | 2019-03-26 | 国网山东省电力公司汶上县供电公司 | Shorten the method for Substation secondary circuit corrective maintenance time using planar bar code technology |
| CN112800637A (en) * | 2021-04-12 | 2021-05-14 | 广东工业大学 | Intelligent substation simulation test device and method |
| CN112800637B (en) * | 2021-04-12 | 2021-08-27 | 广东工业大学 | Intelligent substation simulation test device and method |
| CN113514692A (en) * | 2021-07-16 | 2021-10-19 | 国网江苏省电力有限公司检修分公司 | Transformer substation secondary circuit node voltage monitoring device |
| CN113484646A (en) * | 2021-07-21 | 2021-10-08 | 国网河北省电力有限公司检修分公司 | Transformer substation secondary circuit complex fault positioning device and diagnosis method |
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