CN107769197A - A kind of voltage sag source alignment system based on grid equipment topology - Google Patents
A kind of voltage sag source alignment system based on grid equipment topology Download PDFInfo
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- CN107769197A CN107769197A CN201711119966.7A CN201711119966A CN107769197A CN 107769197 A CN107769197 A CN 107769197A CN 201711119966 A CN201711119966 A CN 201711119966A CN 107769197 A CN107769197 A CN 107769197A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The invention discloses a kind of voltage sag source alignment system based on grid equipment topology, it is intended to solves the technical problems such as voltage sag source is accurately positioned and its reason is sorted out.The present invention is with grid equipment, based on voltage dip record, voltage dip event is carried out for voltage dip identifing source respectively to merge and the propagation modeling of the grid equipment of voltage dip event, and the flow of grid equipment topology mode and voltage dip identifing source based on this modelling, system side voltage sag reason, which has been carried out, based on electric network fault data and electric network thunder and lightning data sorts out modeling, the system side voltage sag reason proposed under transient fault and permanent fault sorts out flow, based on user side load composition and load rule, propose large user's voltage sag reason and sort out flow.The present invention solve voltage sag source be accurately positioned, system side voltage sag reason sort out and user side voltage sag reason subsumption problem.
Description
Technical field
The present invention relates to a kind of voltage sag source alignment system based on grid equipment topology, belong to electric energy quality monitoring skill
Art field.
Background technology
With the continuous development of modern communication technology, memory technology and system integration technology, huge voltage dip prison
Survey grid network is progressively built and perfect, for power quality analysis, is administered and is brought powerful data to support, in raising operation of power networks can
In terms of by property, security and economic benefit, play the role of irreplaceable.
During recognizing voltage dip at home, successively adopting used term has：" voltage sag ", " Voltage Drop " and
" voltage dip " etc..From 2009, term is unified for " voltage dip ".In December, 2013 promulgates national standard GB/T 30137-
2013《Quality of power supply voltage dip and short interruptions》It is middle to be defined as voltage dip (voltage sag)：Certain in power system
Point power-frequency voltage root-mean-square valve is reduced to 0.1p.u.~0.9p.u. suddenly, and recovers just after of short duration lasting 10ms~1min
Normal phenomenon.
Voltage dip monitoring is the important component of electric energy quality monitoring, and voltage dip rate index is quality of power supply evaluation
One of important indicator.The feature portrayed in the characteristic vector of voltage dip mainly has：Temporary decline (residual voltage), temporarily drop
Duration, temporary frequency reducing are inferior.Wherein, temporary frequency reducing time is the statistics that number is temporarily dropped to certain bus or system, is to single temporarily drop
The statistic of event, but from the angle for portraying voltage dip event comprehensively, especially need a point single incident, node and system etc.
Different aspects carry out voltage dip and its when portraying of the order of severity, have reasonability using temporary frequency reducing time as one of feature.
Grid equipment is electric energy in the carrier of transmission of electricity, power transformation and field of power distribution transmission, is connected to power plant, transformer station, defeated
The grid equipment such as electric line, distribution box family.They are divided into single-ended point device, both-end point device and multiterminal point device, and lead to
Cross certain rule to be attached, form the network topological diagram of grid equipment.
Voltage sag source is the position or equipment that voltage dip actually occurs.With the full electricity of voltage dip monitoring network
Press grade covering, the integrality more and more higher of voltage dip data.Along with the telemetry intelligence (TELINT) of power network dispatching system is more and more accurate
Really and in time, the real-time and completeness of the data such as fault data, switch divide-shut brake, protection signal, customer charge, method of operation
Become better and better.
In power network after a large amount of voltage dip monitoring devices of installation and deployment, inevitably bring a difficulty, i.e., one
Individual voltage dip event can be recorded by multiple voltage dip monitoring devices.Therefore, how to be accurately positioned voltage sag source is
Individual problem, how to pass through the electric power system data correlation analysis system side voltage dips such as electric network fault data, power network thunderbolt data
Business reasons and pass through large-size machine and start rule, customer charge feature, the data relation analysis user such as wavy curve feature
Side voltage dip business reasons will also become very difficult.
The content of the invention
It is an object of the invention to overcome deficiency of the prior art, there is provided a kind of voltage based on grid equipment topology is temporary
Drop source alignment system, solve voltage sag source be accurately positioned, system side voltage sag reason sort out and user side voltage dip
The technical problems such as reason classification.
To realize above-mentioned technical purpose and the technique effect, the present invention is achieved through the following technical solutions：
A kind of voltage sag source alignment system of grid equipment topology, including voltage dip event pooled model, voltage are temporary
Grid equipment propagation model, voltage sag source identification model, system side voltage sag reason classification model and the user of drop event
Side voltage sag reason classification model；Voltage dip event pooled model, voltage dip event grid equipment propagation model and
Voltage sag source identification model is linked in sequence successively, and the voltage sag source identification model connection system side voltage sag reason is returned
Class model and user side voltage sag reason classification model.
Several voltage dips record is merged into a voltage dip event by voltage dip event pooled model, specific step
It is rapid as follows：
S01：It is recorded as originating with a certain voltage dip, the generation recorded according to voltage dip seeks one section around moment when
Voltage dip record within long t0, recurrence is until front and rear sides all can not find voltage dip record, by what is sought in duration
Voltage dip record is put into set；Wide in view of the distribution of voltage dip monitoring device and existence time drift possibility, front and rear spy
Target-seeking duration t0 can be adjusted；The front and rear duration t0 sought is timeslice.
S02：The voltage dip set of records ends sought according to step S01, each voltage dip record is analyzed, with some electricity
Temporarily drop is recorded as originating pressure, and circulation confirms that the bus that voltage dip tape deck is monitored is directly electric with the presence or absence of voltage class
Gas is coupled, and there will be the voltage dip of electric link record to be classified as one kind；
S03：Voltage dip event hash table is established, timeslice is consistent and some voltages of direct electric link to be present temporary
Drop record is preserved to voltage dip event table.
The grid equipment propagation model of voltage dip event is based on grid equipment model, and (grid equipment model includes D5000
Dispatch the transformer station in system model, bus, transformer, disconnecting link, breaker, exchange line segment end points and exchange line segment), building station
Topological structure between interior equipment primary equipment topological structure and station, is comprised the following steps that：
S101：The power network account data of synchronised grids device model；
S102：The bus monitored when being occurred using voltage dip event as starting point, with bus-disconnecting link-breaker-disconnecting link-
The topology rule of line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-disconnecting link-bus is exchanged, recurrence obtains institute
There is the topological diagram of voltage dip monitoring record；Recursive base line condition is that the voltage class of bus is higher than by recurrence bus or mother
Line voltage grade is less than setting voltage class.
S103：Topology rule also includes：Electric link between recurrence bus and bus；Bus-bus connection switch-bus-
Disconnecting link-breaker-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-disconnecting link-bus；Just
Mother-disconnecting link-secondary mother-disconnecting link-breaker-other mother-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-side
Mother-breaker-disconnecting link-secondary mother-disconnecting link-positive pole.
S104：Grid equipment topological structure table is established, grid topology data corresponding to voltage dip event is preserved.
Corresponding grid topology data when voltage sag source identification model combination voltage dip event occurs, and extract voltage
Temporarily drop characterizing magnitudes, voltage sag source is identified in power network topology, is comprised the following steps that：
S201：All monitoring points in the topological structure of electric of certain voltage dip event are extracted, extract each monitoring point association
Electric network fault data；
S202：Voltage class highest bus monitoring point is same with the most deep voltage dip monitoring point of voltage dip depth
During monitoring point, the monitoring point is voltage sag source；
S203：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, when searching electric network fault data, when voltage dip event time paragraph is in electric network fault event time period,
The monitoring point for having direct electric link with electric network fault position is voltage sag source；
S204：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, when searching for less than electric network fault data, voltage dip depth is most deep and voltage class is less than 220kV monitoring point
For voltage sag source；
S205：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, search for less than electric network fault data, when the voltage class of monitoring point is more than or equal to 220kV, voltage levels prison
Measuring point is voltage sag source；
S206：Establish voltage dip event and temporarily drop source table, the voltage dip measuring point of acquisition is saved in voltage sag source
Table.
System side voltage sag reason classification model judges system side voltage sag reason and sorted out：Voltage sag source when
Between the period of section and electric network fault have common factor, if electric network fault is transient fault, from electric network thunder and lightning system extraction thunderbolt number
According to；If electric network fault is permanent fault, directly it is judged as voltage dip caused by short trouble, comprises the following steps that：
S301：For the electric network fault of transient fault, the timeslice of voltage sag source with before and after the timeslice of power network thunderbolt
The time of difference is setting time section t1, searches for the thunderbolt data of lightning systems, with thunder in setting time section t1 before transient fault
The thunder and lightning hit in electric current maximum and electric network fault equipment range set regional extent k is voltage sag reason；
S302：For the electric network fault of permanent fault, the grid equipment that electric network fault influences, including bus, circuit are enumerated
And transformer, the electric network fault in electric network fault list near voltage sag source is voltage sag reason, by voltage dip
Reason is classified as short trouble；
S303：The time slice of voltage dip event can not match with electric network fault time of origin fragment and voltage dip
Wave character is shown as transformer excitation and shoved, then being classified as transformer excitation the reason for voltage dip shoves.
User side voltage sag reason classification model：According to the transformer station of user side outlet connection, obtaining user side may
The voltage dip list of thing of generation, synchronous user side load compositional data obtains the temporal regularity of large user's high load capacity, then closes
Association analysis between connection analysis high load capacity and voltage dip, draws user side voltage sag reason, comprises the following steps that；
S401：Synchronised grids large user list and the transmission of electricity outlet of each user and substation information；
S402：According to transformer station and outlet data, large user's load compositional data in synchronised grids, large user's height is counted
The temporal regularity data of load；
S403：For different types of load data, using the time as according to depth association analysis user side voltage dip thing
Number of packages evidence；
S404:When grid side voltage sag reason and inconsistent user side voltage sag reason, sentenced by wave character
Not.
Beneficial effects of the present invention include：
1st, based on grid equipment topology data, electrically coupled with power network for fact basis, and combine voltage dip and send out
Raw timeslice, meet the propagation characteristic after voltage dip event occurs, and according to voltage dip depth localization voltage dip event
Source, solves the problems, such as voltage dip identifing source；
2nd, system side voltage sag reason analysis model is established, electric network fault data, electricity can be merged by this method
The external system data such as net thunderbolt data, can analyze system side voltage dip occurrence cause；
3rd, user side voltage sag reason analysis model is established, can merge large-size machine by this method starts rule
The data such as rule, customer charge feature, wavy curve feature, can analyze user side voltage dip occurrence cause.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Fig. 1 is a kind of structural representation of the voltage sag source alignment system of grid equipment topology of the application；
Fig. 2 is the structural representation that the voltage sag source based on grid equipment topology established by the present invention positions.
Fig. 3 is the schematic flow sheet for the voltage dip identifing source established by the present invention.
Embodiment
Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that ability
The technical staff in domain can be better understood from the present invention and can be practiced, but illustrated embodiment is not as the limit to the present invention
It is fixed.
As shown in figure 1, a kind of voltage sag source alignment system of grid equipment topology, including voltage dip event merge mould
Type, the grid equipment propagation model of voltage dip event, voltage sag source identification model, system side voltage sag reason sort out mould
Type and user side voltage sag reason classification model.
As shown in Figure 2,3, multiple voltage dips record is merged into a voltage dip by voltage dip event pooled model
Event, comprise the following steps that：
S01：It is recorded as originating with a certain voltage dip, when finding one section before and after the generation moment recorded according to voltage dip
Between voltage dip record within (t0), recurrence is until front and rear sides all can not find voltage dip record；In view of voltage dip
Monitoring device distribution is wide and the possibility of existence time drift, the front and rear duration (t0) sought can adjust；
S02：The voltage dip set of records ends sought according to step S01, each voltage dip record is analyzed, with some electricity
Temporarily drop is recorded as originating pressure, and circulation confirms that the bus that voltage dip tape deck is monitored is directly electric with the presence or absence of voltage class
Gas is coupled, and there will be the voltage dip of electric link record to be classified as one kind；After sorting out with timeslice, each voltage dip is analyzed
Record；
S03：Voltage dip event hash table is established, timeslice is consistent and multiple voltages of direct electric link to be present temporary
Drop record is preserved to voltage dip event table.
The grid equipment propagation model of voltage dip event is based on grid equipment model, and (grid equipment model includes D5000
Dispatch the transformer station in system model, bus, transformer, disconnecting link, breaker, exchange line segment end points and exchange line segment), building station
Topological structure between interior equipment primary equipment topological structure and station, is comprised the following steps that：
S101：The power network account data of synchronised grids device model；
S102：The bus monitored when being occurred using voltage dip event as starting point, with bus-disconnecting link-breaker-disconnecting link-
The topology rule of line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-disconnecting link-bus is exchanged, recurrence obtains institute
There is the topological diagram of voltage dip monitoring record；Recursive base line condition is that the voltage class of bus is higher than by recurrence bus or mother
Line voltage grade is less than setting voltage class (10kV).
S103：Topology rule also includes：Electric link between recurrence bus and bus；Bus-bus connection switch-bus-
Disconnecting link-breaker-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-disconnecting link-bus；Just
Mother-disconnecting link-(secondary female)-disconnecting link-breaker-(other female)-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-knife
Lock-(other female)-breaker-disconnecting link-(secondary female)-disconnecting link-positive pole
S104：Grid equipment topological structure table is established, grid topology data corresponding to voltage dip event is preserved.
Corresponding grid topology data when voltage sag source identification model combination voltage dip event occurs, and extract voltage
Temporarily drop characterizing magnitudes, voltage sag source is identified in power network topology, is comprised the following steps that：
S201：All monitoring points in the topological structure of electric of certain voltage dip event are extracted, extract each monitoring point association
Electric network fault data；
S202：Voltage class highest bus monitoring point is same with the most deep voltage dip monitoring point of voltage dip depth
During monitoring point, the monitoring point is voltage sag source；
S203：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, when searching electric network fault data, when voltage dip event time paragraph is in electric network fault event time period,
The monitoring point for having direct electric link with electric network fault position is voltage sag source；
S204：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, when searching for less than electric network fault data, voltage dip depth is most deep and voltage class is less than 220kV monitoring point
For voltage sag source；
S205：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, search for less than electric network fault data, when the voltage class of monitoring point is more than or equal to 220kV, voltage levels prison
Measuring point is voltage sag source；
S206：Establish voltage dip event and temporarily drop source table, the voltage dip measuring point of acquisition is saved in voltage sag source
Table.
System side voltage sag reason classification model judges system side voltage sag reason and sorted out：Voltage sag source when
Between the period of section and electric network fault have common factor, if electric network fault is transient fault, from electric network thunder and lightning system extraction thunderbolt number
According to；If electric network fault is permanent fault, directly it is judged as voltage dip caused by short trouble, comprises the following steps that：
S301：For the electric network fault of transient fault, the timeslice of voltage sag source with before and after the timeslice of power network thunderbolt
The time of difference is a certain setting time section (t1), searches for the thunderbolt data of lightning systems, with before transient fault during a certain setting
Between the interior thunder-strike current of section (t1) is maximum and a certain setting regions scope (k) of electric network fault equipment scope in thunder and lightning be voltage dip
Reason；
S302：For the electric network fault of permanent fault, enumerate the grid equipment of electric network fault influence, including bus, circuit,
Transformer, the electric network fault in electric network fault list near voltage sag source are voltage sag reason, can be by voltage dip
Reason is classified as short trouble；
S303：The time slice of voltage dip event can not match with electric network fault time of origin fragment and voltage dip
Wave character is shown as transformer excitation and shoved, then being classified as transformer excitation the reason for voltage dip shoves.
User side voltage sag reason classification model：According to the transformer station of user side outlet connection, obtaining user side may
The voltage dip list of thing of generation, synchronous user side load compositional data obtains the temporal regularity of large user's high load capacity, then closes
Association analysis between connection analysis high load capacity and voltage dip, so as to draw user side voltage sag reason, is comprised the following steps that；
S401：Synchronised grids large user list and the transmission of electricity outlet of each user and substation information；
S402：According to transformer station and outlet data, large user's load compositional data in synchronised grids, large user's height is counted
The temporal regularity data of load；
S403：For different types of load data, using the time as according to depth association analysis user side voltage dip thing
Number of packages evidence；
S404:When grid side voltage sag reason and inconsistent user side voltage sag reason, sentenced by wave character
Not.
As shown in Fig. 2 voltage sag source alignment system of the present embodiment based on grid equipment topology carries out voltage sag source
Positioning, comprises the following steps：
For example, 2016-10-16 afternoons 14:14 or so, occur in this side of the voltage dip event application of certain transformer station of city
Method, it successfully located voltage sag source and analyzed the occurrence cause of this time voltage dip event.
Step 1：It can be found from monitoring system, the voltage dip note of 14 minutes or so 2 pm of on October 16th, 2016
Record has 98.One voltage dip event is often recorded by multiple voltage dip monitoring points, need to be to this 98 voltage dip prisons
Survey record to merge, to obtain voltage dip event, comprise the following steps that：
S501：A voltage dip is selected at random in 98 voltage dips record to be recorded as originating, according to voltage dip
Voltage dip record within being found 1 minute before and after the generation moment of record, if front and rear find voltage dip, with the electricity found
The generations moment voltage dip record before and after hunting time section within 1 minute again of the temporary drop record of pressure, then continuous recurrence, up to
Front and rear sides all can not find voltage dip record.It was found that this 98 voltage dip records belong to same class after sorting out with timeslice；
S502：After being sorted out with timeslice, each voltage dip record is analyzed on this basis, temporarily drops note with a random voltages
Record and whether there is directly electrically connection with the bus that remaining voltage dip monitoring record device is monitored for starting, circulation matching
Electric link relation data between the bus of 98 voltage dip monitorings is merged, deposited all by knot, circulation after terminating
One kind is classified as in the voltage dip record of electric link.Wherein there are 87 voltage dip monitoring records to be classified as one kind；
S503：Voltage dip event hash table is established, timeslice is consistent and multiple voltages of direct electric link be present
Temporarily drop record is preserved to voltage dip event table, it can be assumed that this 87 voltage dip records belong to a voltage dip thing
Part.
Step 2：Based on the transformer station in D5000 scheduling systems, bus, transformer, disconnecting link, breaker, the exchange extremity of segment
The grid equipment models such as point, exchange line segment, design topological structure between station equipment primary equipment topological structure and station, specific steps
It is as follows：
S601：Transformer station where 87 voltage dip records of circulation, the change of synchronous D5000 scheduling system Zhong Ge transformer stations
The power network account datas such as power station, bus, disconnecting link, breaker, exchange line segment end points, exchange line segment, are preserved to power transformation platform respectively
Account table, bus account table, disconnecting link account table, breaker account table, exchange and exchange line segment form at line segment end points table；
S602：The bus monitored when being occurred using voltage dip event is starting point, 87 mothers that searching loop is monitored to
Line, with bus-disconnecting link-breaker-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-knife
The canonical topology rule of lock-bus, recurrence obtain the topological diagram of all voltage dip monitoring records.Recursive base line condition is female
The voltage class of line is higher than is less than setting voltage class (10kV), recursive recurrence bar by recurrence bus or busbar voltage grade
Part is that the voltage class of bus is more than or equal to setting voltage class.
S603：Typical topology rule also includes：Electric link between recurrence bus and bus, bus-mother are opened
Pass-bus-disconnecting link-breaker-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-knife
Lock-bus, positive pole-disconnecting link-(secondary female)-disconnecting link-breaker-(other female)-disconnecting link-exchange line segment end points-exchange line segment-exchange
Line segment end points-disconnecting link-(other female)-breaker-disconnecting link-(secondary female)-disconnecting link-positive pole.Recursive base line condition is bus connection switch point
Lock, recursive recursive condition are that bus connection switch closes a floodgate.
S604：Grid equipment topological structure table is established, 87 voltage dips are recorded to power network corresponding to monitored bus
Topological data is preserved.
Step 3：Voltage sag source identification model：Corresponding grid topology data when occurring with reference to voltage dip event, and
Voltage dip characterizing magnitudes are extracted, voltage sag source is identified in power network topology, is comprised the following steps that：
S701：Extracted from topological structure of electric corresponding to 87 voltage dips record voltage levels bus monitoring point or
The most deep voltage dip monitoring point of voltage dip depth, then moment extraction busbar voltage grade highest and electricity are occurred with voltage dip
Press the electric network fault data of the most deep monitoring point of temporary drawdown degree；
S702：The voltage levels bus monitoring point and most deep voltage dip monitoring point of voltage dip depth is voltage dip
Source；
S703：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, when searching electric network fault data, when voltage dip event time paragraph is in electric network fault event time period,
The monitoring point for having direct electric link with electric network fault position is voltage sag source；
S704：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, when searching for less than electric network fault data, voltage dip depth is most deep and voltage class is less than 220kV monitoring point
For voltage sag source；
S705：The voltage dip record high voltage appearance grade bus monitoring point monitoring point most deep with voltage dip depth is not
Same monitoring point, search for less than electric network fault data, when the voltage class of monitoring point is more than or equal to 220kV, voltage levels prison
Measuring point is voltage sag source；
S706：Establish voltage dip event and temporarily drop source table, it is temporary that the voltage dip measuring point that S05 steps obtain is saved in into voltage
Drop source table；
In all monitoring points, 701 circuit breaker voltage grade highests of West Xia Dynasty's villa change, and voltage dip depth is most deep, can recognize
Source temporarily drops in 701 circuit breaker voltages become for West Xia Dynasty villa.
Step 4：System side voltage sag reason classification model：
There are common factor the period of voltage sag source and the period of electric network fault, if electric network fault is transient fault, from electricity
Extraction thunderbolt data in net lightning systems；If electric network fault is permanent fault, directly it is judged as that voltage is temporary caused by short trouble
Drop, is comprised the following steps that：
Obtained from the electric network fault data of extraction, the failure is permanent fault.The grid equipment of electric network fault influence is enumerated,
Including bus, circuit, transformer, nearest monitoring point is in the grid equipment influenceed in voltage dip record set with electric network fault
701 breakers of certain transformer station, then it is classified as short trouble the reason for this voltage dip event.
It the above is only the preferred embodiment of the present invention, it should be pointed out that：Come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (6)
1. a kind of voltage sag source alignment system of grid equipment topology, it is characterised in that merge mould including voltage dip event
Type, the grid equipment propagation model of voltage dip event, voltage sag source identification model, system side voltage sag reason sort out mould
Type and user side voltage sag reason classification model；Voltage dip event pooled model, the grid equipment of voltage dip event pass
Broadcast model and voltage sag source identification model is linked in sequence successively, the voltage sag source identification model connection system side voltage is temporary
Reason classification model and user side voltage sag reason classification model drop.
A kind of 2. voltage sag source alignment system of grid equipment topology according to claim 1, it is characterised in that
Several voltage dips record is merged into a voltage dip event by voltage dip event pooled model, and specific steps are such as
Under：
S01：It is recorded as originating with a certain voltage dip, one section of duration t0 is sought according to the generation that voltage dip records around moment
Within voltage dip record, recurrence until front and rear sides all can not find voltage dip record, the voltage that will be sought in duration
Temporarily drop record is put into set；
S02：The voltage dip set of records ends sought according to step S01, each voltage dip record is analyzed, it is temporary with some voltage
Drop is recorded as originating, and circulation confirms that the bus that voltage dip tape deck is monitored directly electrically joins with the presence or absence of voltage class
Knot, there will be the voltage dip of electric link record to be classified as one kind；
S03：Voltage dip event hash table is established, timeslice is consistent and some voltage dips of direct electric link be present and remember
Record is preserved to voltage dip event table.
A kind of 3. voltage sag source positioning of grid equipment topology according to claim 1
System, it is characterised in that
The grid equipment propagation model of voltage dip event is based on grid equipment model, structure station equipment primary equipment topology knot
Topological structure between structure and station, is comprised the following steps that：
S101：The power network account data of synchronised grids device model；
S102：The bus monitored when being occurred using voltage dip event is starting point, with bus-disconnecting link-breaker-disconnecting link-exchange
The topology rule of line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-disconnecting link-bus, recurrence obtain all electricity
The topological diagram of monitoring record temporarily drops in pressure；Recursive base line condition is that the voltage class of bus is higher than by recurrence bus or bus electricity
Grade is pressed to be less than setting voltage class.
S103：Topology rule also includes：Electric link between recurrence bus and bus；Bus-bus connection switch-bus-disconnecting link-
Breaker-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-breaker-disconnecting link-bus；Positive pole-knife
Lock-(secondary female)-disconnecting link-breaker-(other female)-disconnecting link-exchange line segment end points-exchange line segment-exchange line segment end points-disconnecting link-is (other
It is female)-breaker-disconnecting link-(secondary female)-disconnecting link-positive pole.
S104：Grid equipment topological structure table is established, grid topology data corresponding to voltage dip event is preserved.
A kind of 4. voltage sag source alignment system of grid equipment topology according to claim 1, it is characterised in that
Corresponding grid topology data when voltage sag source identification model combination voltage dip event occurs, and extract voltage dip
Characterizing magnitudes, voltage sag source is identified in power network topology, comprised the following steps that：
S201：All monitoring points in the topological structure of electric of certain voltage dip event are extracted, extract the power network of each monitoring point association
Fault data；
S202：Voltage class highest bus monitoring point and the most deep voltage dip monitoring point of voltage dip depth are same monitoring
During point, the monitoring point is voltage sag source；
S203：It is not same that voltage dip, which records high voltage appearance grade bus monitoring point and the most deep monitoring point of voltage dip depth,
Monitoring point, when searching electric network fault data, when voltage dip event time paragraph is in electric network fault event time period, with electricity
The monitoring point that net fault bit is equipped with direct electric link is voltage sag source；
S204：It is not same that voltage dip, which records high voltage appearance grade bus monitoring point and the most deep monitoring point of voltage dip depth,
Monitoring point, when searching for less than electric network fault data, the monitoring point that voltage dip depth is most deep and voltage class is less than 220kV is electricity
Source temporarily drops in pressure；
S205：It is not same that voltage dip, which records high voltage appearance grade bus monitoring point and the most deep monitoring point of voltage dip depth,
Monitoring point, search for less than electric network fault data, when the voltage class of monitoring point is more than or equal to 220kV, voltage levels monitoring point
For voltage sag source；
S206：Establish voltage dip event and temporarily drop source table, the voltage dip measuring point of acquisition is saved in voltage sag source table.
A kind of 5. voltage sag source alignment system of grid equipment topology according to claim 1, it is characterised in that
System side voltage sag reason classification model judges system side voltage sag reason and sorted out：The period of voltage sag source
There is common factor with the period of electric network fault, if electric network fault is transient fault, the extraction thunderbolt data from electric network thunder and lightning system；If
Electric network fault is permanent fault, is directly judged as voltage dip caused by short trouble, comprises the following steps that：
S301：For the electric network fault of transient fault, timeslice that timeslice and the power network of voltage sag source are struck by lightning is front and rear to differ
Time be setting time section t1, search for the thunderbolt data of lightning systems, with before transient fault in setting time section t1 be struck by lightning electricity
The thunder and lightning flowed in maximum and electric network fault equipment range set regional extent k is voltage sag reason；
S302：For the electric network fault of permanent fault, the grid equipment that electric network fault influences, including bus, circuit and change are enumerated
Depressor, the electric network fault in electric network fault list near voltage sag source is voltage sag reason, the reason for by voltage dip
It is classified as short trouble；
S303：The time slice of voltage dip event can not be matched with electric network fault time of origin fragment and the waveform of voltage dip
Feature is shown as transformer excitation and shoved, then being classified as transformer excitation the reason for voltage dip shoves.
A kind of 6. voltage sag source alignment system of grid equipment topology according to claim 1, it is characterised in that
User side voltage sag reason classification model：According to the transformer station of user side outlet connection, obtaining user side may occur
Voltage dip list of thing, synchronous user side load compositional data obtains the temporal regularity of large user's high load capacity, then associates point
The association analysis between high load capacity and voltage dip is analysed, user side voltage sag reason is drawn, comprises the following steps that；
S401：Synchronised grids large user list and the transmission of electricity outlet of each user and substation information；
S402：According to transformer station and outlet data, large user's load compositional data in synchronised grids, large user's high load capacity is counted
Temporal regularity data；
S403：For different types of load data, using the time as according to depth association analysis user side voltage dip event number
According to；
S404:When grid side voltage sag reason and inconsistent user side voltage sag reason, differentiated by wave character.
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| CN110137958A (en) * | 2019-05-22 | 2019-08-16 | 深圳供电局有限公司 | A kind of user's Voltage Sag Analysis method and its system |
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| CN113451988A (en) * | 2021-06-02 | 2021-09-28 | 合占电力有限公司 | Modeling based on upgrading and transforming system equipment |
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| CN117439068A (en) * | 2023-10-26 | 2024-01-23 | 国网宁夏电力有限公司中卫供电公司 | Voltage sag estimation method, medium and system in large-scale power grid |
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