CN107769197B - A kind of voltage sag source positioning system based on grid equipment topology - Google Patents
A kind of voltage sag source positioning system based on grid equipment topology Download PDFInfo
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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
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Abstract
The invention discloses a kind of voltage sag source positioning systems based on grid equipment topology, it is intended to solve 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 process based on this modelling grid equipment topology mode and voltage dip identifing source, 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 process, based on user side load ingredient and load rule, it proposes large user's voltage sag reason and sorts out process.The present invention solves voltage sag source accurate positionin, the classification of system side voltage sag reason and user side voltage sag reason subsumption problem.
Description
Technical field
The present invention relates to a kind of voltage sag source positioning systems based on grid equipment topology, belong to electric energy quality monitoring skill
Art field.
Background technique
With the continuous development of modern communication technology, memory technology and system integration technology, huge voltage dip prison
Survey grid network is gradually built and perfect, for power quality analysis, administers and powerful data is brought to support, in raising operation of power networks can
In terms of property, safety and economic benefit, there is irreplaceable role.
At home recognize voltage dip during, 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-
By voltage dip (voltage sag) in 2013 " power quality voltage dip and short interruptions " is defined as: certain in electric system
Point power-frequency voltage root-mean-square valve is reduced to 0.1p.u.~0.9p.u. suddenly, and restores normal after of short duration lasting 10ms~1min
The phenomenon that.
Voltage dip monitoring is the important component of electric energy quality monitoring, and voltage dip rate index is power quality evaluation
One of important indicator.The feature portrayed in the feature vector of voltage dip mainly has: temporary decline (residual voltage), temporarily drop is held
Continuous time, 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 temporary drop thing
The statistic of part, but from the angle for portraying voltage dip event comprehensively, especially need a point single incident, node and system etc. no
Voltage dip and when portraying of its severity are carried out with level, temporary frequency reducing time is had into reasonability as one of feature.
Grid equipment is the carrier that electric energy is transmitted in transmission of electricity, power transformation and field of power distribution, is connected to power plant, substation, defeated
The grid equipments 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
It crosses certain rule to be attached, constitutes 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
Grade covering is pressed, the integrality of voltage dip data is higher and higher.Along with the telemetry intelligence (TELINT) of power network dispatching system is more and more quasi-
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
It becomes better and better.
In power grid after a large amount of voltage dip monitoring devices of installation and deployment, inevitably bring a difficulty, i.e., one
A voltage dip event can be recorded by multiple voltage dip monitoring devices.Therefore, voltage sag source how is accurately positioned is
How a problem passes through the electric power system datas correlation analysis system side voltage dips such as electric network fault data, power grid lightning stroke data
Business reasons and passes through large-size machine and start rule, the data relation analysis user such as customer charge feature, wavy curve feature
Side voltage dip business reasons will also become very difficult.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, it is temporary to provide a kind of voltage based on grid equipment topology
Drop source positioning system solves voltage sag source accurate positionin, the classification of system side voltage sag reason and user side voltage dip
The technical problems such as reason classification.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of voltage sag source positioning 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 successively linked in sequence, 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 to walk
It is rapid as follows:
S01: being recorded as originating with a certain voltage dip, when seeking one section around moment according to the generation that voltage dip records
Voltage dip record within length, recurrence is until front and rear sides all can not find voltage dip record, the electricity that will be sought in duration
Temporarily drop record is put into set to pressure；In view of the distribution of voltage dip monitoring device is extensively and there are the possibility of time drift, front and back is sought
Duration it is adjustable；The duration that front and back is sought is timeslice.
S02: the voltage dip set of records ends sought according to step S01 analyzes each voltage dip record, with some electricity
Temporarily drop is recorded as originating pressure, and the bus that circulation confirmation voltage dip recording device is monitored is directly electric with the presence or absence of voltage class
Gas is coupled, and the voltage dip record that electric link will be present is classified as one kind；
S03: establishing voltage dip event hash table, timeslice is consistent and there are several voltages of direct electric link are temporary
Drop record is saved 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 substation in system model, bus, transformer, disconnecting link, breaker, exchange line segment endpoint and exchange line segment), building station
Topological structure between interior equipment primary equipment topological structure and station, the specific steps are as follows:
S101: the power grid account data of synchronised grids device model；
S102: the bus monitored when being occurred using voltage dip event is starting point, with the-the first disconnecting link-the first of bus starting point
The-the second disconnecting link-the first of breaker exchanges line segment endpoint-exchange line segment-the second and exchanges the-the second open circuit of line segment endpoint-third disconnecting link
Four disconnecting links of device-the-bus terminal topology rule, recurrence obtain the topological diagram of all voltage dip monitoring records；Recursive base
Lines part is that the voltage class of bus is higher than by recurrence bus or busbar voltage grade less than setting voltage class；
S103: topology rule further include: the electric link between recurrence bus and bus；Bus starting point-bus connection switch-mother
Line interlude the-the first disconnecting link the-the second disconnecting link-the first of the-the first breaker exchanges line segment endpoint-exchange line segment-the second and exchanges line segment
Endpoint-the-the four disconnecting links of the-the second breaker of third disconnecting link-bus terminal；Female-the second disconnecting link-the of first the-the first disconnecting link of positive pole-pair
One breaker-side mother-third disconnecting link-the first exchanges line segment endpoint-exchange line segment-the second and exchanges the-the four disconnecting link of line segment endpoint-side
Female female-the six the-the second positive pole of disconnecting link of-the second the-the five disconnecting link of breaker-pair；
S104: establishing grid equipment topological structure table, and the corresponding grid topology data of voltage dip event is saved.
Voltage sag source identification model combination voltage dip event corresponding grid topology data when occurring, and extract voltage
Temporarily drop characterizing magnitudes, identify voltage sag source in power network topology, the specific steps are as follows:
S201: all monitoring points in the topological structure of electric of certain voltage dip event are extracted, it is associated to extract each monitoring point
Electric network fault data；
S202: the highest bus monitoring point of voltage class is same with the most deep voltage dip monitoring point of voltage dip depth
When 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 piece is fallen in electric network fault event time piece,
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 the monitoring point of 220kV
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 is 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: establishing voltage dip event and temporarily drop source table, and the voltage dip record point that will acquire is saved in voltage sag source
Table.
System side voltage sag reason classification model judges system side voltage sag reason and sorts out: voltage sag source when
Between the timeslice of piece and electric network fault have intersection, if electric network fault be transient fault, from electric network thunder and lightning system extract lightning stroke number
According to；If electric network fault is permanent fault, directly it is judged as voltage dip caused by short trouble, the specific steps are as follows:
S301: for the electric network fault of transient fault, the timeslice front and back of timeslice and the power grid lightning stroke of voltage sag source
The time of difference is set period of time t1, searches for the lightning stroke data of lightning systems, with thunder in set period of time t1 before transient fault
The thunder and lightning hit in electric current maximum and electric network fault equipment range setting regions range k is voltage sag reason；
S302: for the electric network fault of permanent fault, the grid equipment of electric network fault influence, including bus, route are enumerated
And transformer, it near the electric network fault of voltage sag source is voltage sag reason in electric network fault list, by voltage dip
Reason is classified as short trouble；
S303: the time slice of voltage dip event can not be matched with electric network fault time of origin segment and voltage dip
Wave character is shown as transformer excitation and shoves, then is classified as transformer excitation the reason of voltage dip and shoves.
User side voltage sag reason classification model: according to the substation 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, obtains user side voltage sag reason, specific step is as follows；
S401: synchronised grids large user list and the transmission of electricity outlet of each user and substation information；
S402: according to substation and outlet data, large user's load compositional data in synchronised grids counts large user's height
The temporal regularity data of load；
S403: being directed to different types of load data, is according to depth association analysis user side voltage dip thing with the time
Number of packages evidence；
S404: when grid side voltage sag reason and inconsistent user side voltage sag reason, sentenced by wave character
Not.
The beneficial effect comprise that
1, it is based on grid equipment topology data, is electrically coupled with power grid for fact basis, and voltage dip is combined to send out
Raw timeslice meets 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；
2, system side voltage sag reason analysis model is established, electric network fault data, electricity can be merged by this method
The external systems data such as net lightning stroke data, can analyze system side voltage dip occurrence cause；
3, user side voltage sag reason analysis model is established, large-size machine starting rule can be merged by this method
The data such as rule, customer charge feature, wavy curve feature, can analyze user side voltage dip occurrence cause.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
Fig. 1 is a kind of structural schematic diagram of the voltage sag source positioning system of grid equipment topology of the application；
Fig. 2 is the structural schematic diagram for the voltage sag source positioning based on grid equipment topology established through the invention.
Fig. 3 is the flow diagram for the voltage dip identifing source established through the invention.
Specific embodiment
Technical solution of the present invention is described in further detail with specific embodiment with reference to the accompanying drawing, so that ability
The technical staff in domain can better understand the present invention and can be practiced, but illustrated embodiment is not as to limit of the invention
It is fixed.
As shown in Figure 1, a kind of voltage sag source positioning 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, the specific steps are as follows:
S01: being recorded as originating with a certain voltage dip, when according to finding one section before and after the generation moment of voltage dip record
Voltage dip record within long t0, recurrence is until front and rear sides all can not find voltage dip record；In view of voltage dip is supervised
Device distribution is surveyed extensively and there are the possibility of time drift, the duration t0 that front and back is sought is adjustable；
S02: the voltage dip set of records ends sought according to step S01 analyzes each voltage dip record, with some electricity
Temporarily drop is recorded as originating pressure, and the bus that circulation confirmation voltage dip recording device is monitored is directly electric with the presence or absence of voltage class
Gas is coupled, and the voltage dip record that electric link will be present is classified as one kind；After sorting out with timeslice, each voltage dip is analyzed
Record；
S03: establishing voltage dip event hash table, timeslice is consistent and there are multiple voltages of direct electric link are temporary
Drop record is saved 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 substation in system model, bus, transformer, disconnecting link, breaker, exchange line segment endpoint and exchange line segment), building station
Topological structure between interior equipment primary equipment topological structure and station, the specific steps are as follows:
S101: the power grid account data of synchronised grids device model；
S102: the bus monitored when being occurred using voltage dip event is starting point, with the-the first disconnecting link-the first of bus starting point
The-the second disconnecting link-the first of breaker exchanges line segment endpoint-exchange line segment-the second and exchanges the-the second open circuit of line segment endpoint-third disconnecting link
Four disconnecting links of device-the-bus terminal topology rule, recurrence obtain the topological diagram of all voltage dip monitoring records；Recursive base
Lines part is that the voltage class of bus is higher than by recurrence bus or busbar voltage grade less than setting voltage class；
S103: topology rule further include: the electric link between recurrence bus and bus；Bus starting point-bus connection switch-mother
Line interlude the-the first disconnecting link the-the second disconnecting link-the first of the-the first breaker exchanges line segment endpoint-exchange line segment-the second and exchanges line segment
Endpoint-the-the four disconnecting links of the-the second breaker of third disconnecting link-bus terminal；Female-the second disconnecting link-the of first the-the first disconnecting link of positive pole-pair
One breaker-side mother-third disconnecting link-the first exchanges line segment endpoint-exchange line segment-the second and exchanges the-the four disconnecting link of line segment endpoint-side
Female female-the six the-the second positive pole of disconnecting link of-the second the-the five disconnecting link of breaker-pair；
S104: establishing grid equipment topological structure table, and the corresponding grid topology data of voltage dip event is saved.
Voltage sag source identification model combination voltage dip event corresponding grid topology data when occurring, and extract voltage
Temporarily drop characterizing magnitudes, identify voltage sag source in power network topology, the specific steps are as follows:
S201: all monitoring points in the topological structure of electric of certain voltage dip event are extracted, it is associated to extract each monitoring point
Electric network fault data；
S202: the highest bus monitoring point of voltage class is same with the most deep voltage dip monitoring point of voltage dip depth
When monitoring point, which 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 piece is fallen in electric network fault event time piece,
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 the monitoring point of 220kV
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 is 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: establishing voltage dip event and temporarily drop source table, and the voltage dip record point that will acquire is saved in voltage sag source
Table.
System side voltage sag reason classification model judges system side voltage sag reason and sorts out: voltage sag source when
Between the timeslice of piece and electric network fault have intersection, if electric network fault be transient fault, from electric network thunder and lightning system extract lightning stroke number
According to；If electric network fault is permanent fault, directly it is judged as voltage dip caused by short trouble, the specific steps are as follows:
S301: for the electric network fault of transient fault, the timeslice front and back of timeslice and the power grid lightning stroke of voltage sag source
The time of difference is a certain set period of time (t1), searches for the lightning stroke data of lightning systems, with before transient fault when a certain setting
Between the interior thunder-strike current of section (t1) is maximum and a certain setting regions range (k) of electric network fault equipment range in thunder and lightning be voltage dip
Reason；
S302: for the electric network fault of permanent fault, enumerating the grid equipment of electric network fault influence, including bus, route,
Transformer near the electric network fault of voltage sag source is voltage sag reason in electric network fault list, can be by voltage dip
Reason is classified as short trouble；
S303: the time slice of voltage dip event can not be matched with electric network fault time of origin segment and voltage dip
Wave character is shown as transformer excitation and shoves, then is classified as transformer excitation the reason of voltage dip and shoves.
User side voltage sag reason classification model: according to the substation 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, to obtain user side voltage sag reason, specific step is as follows；
S401: synchronised grids large user list and the transmission of electricity outlet of each user and substation information；
S402: according to substation and outlet data, large user's load compositional data in synchronised grids counts large user's height
The temporal regularity data of load；
S403: being directed to different types of load data, is according to depth association analysis user side voltage dip thing with the time
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 Figure 2, the present embodiment carries out voltage sag source based on the voltage sag source positioning system of grid equipment topology
Positioning, comprising the following steps:
For example, 2016-10-16 14:14 in afternoon or so, occurs in this side of the voltage dip event application of certain substation, city
Method successfully located voltage sag source and analyze the occurrence cause of this time voltage dip event.
Step 1: can find from monitoring system, the voltage dip note in 2 pm 14 minutes or so October 16 in 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
It surveys record to merge, to obtain voltage dip event, the specific steps are as follows:
S501: a voltage dip is selected at random in 98 voltage dip records and is recorded as originating, according to voltage dip
The voltage dip record of record occurred within moment front and back is found 1 minute, if voltage dip is found in front and back, with the electricity found
The generation moment for pressing temporarily drop record, voltage dip of the hunting time section front and back within 1 minute recorded again, then continuous recurrence, until
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 is starting, and the bus that circulation matching is monitored with remaining voltage dip monitoring record device is with the presence or absence of direct electrical connection
Electric link relation data between the bus of 98 voltage dips monitoring is merged after circulation terminates, is deposited all by knot
One kind is classified as in the voltage dip record of electric link.Wherein there are 87 voltage dip monitoring records that can be classified as one kind；
S503: establishing voltage dip event hash table, timeslice is consistent and there are multiple voltages of direct electric link
Temporarily drop record is saved 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 substation in D5000 scheduling system, bus, transformer, disconnecting link, breaker, the exchange extremity of segment
The grid equipments 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: the substation where 87 voltage dip records of circulation, synchronous D5000 scheduling system Zhong Ge substation
The power grids account datas such as substation, bus, disconnecting link, breaker, exchange line segment endpoint, exchange line segment, save respectively to substation
Account table, disconnecting link account table, breaker account table, exchanges line segment endpoint table and exchanges line segment form bus account table；
S602: the bus monitored when being occurred using voltage dip event loops through 87 mothers being monitored to as starting point
Line, with bus-disconnecting link-breaker-disconnecting link-exchange line segment endpoint-exchange line segment-exchange line segment endpoint-disconnecting link-breaker-knife
Lock-bus canonical topology rule, recurrence obtain the topological diagram of all voltage dip monitoring records.Recursive base line condition is female
The voltage class of line, which is higher than, is less than setting voltage class (10kV), recursive recurrence item 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 further include: the electric link between recurrence bus and bus, bus-bus connection switch-
Bus-disconnecting link-breaker-disconnecting link-exchange line segment endpoint-exchange line segment-exchange line segment endpoint-disconnecting link-breaker-disconnecting link-mother
Line, positive pole-disconnecting link-(secondary female)-disconnecting link-breaker-(other female)-disconnecting link-exchange line segment endpoint-exchange line segment-exchange extremity of segment
Point-disconnecting link-(other female)-breaker-disconnecting link-(secondary female)-disconnecting link-positive pole.Recursive base line condition is bus connection switch separating brake, recurrence
Recursive condition be bus connection switch close a floodgate.
S604: establishing grid equipment topological structure table, and 87 voltage dips are recorded to the monitored corresponding power grid of bus
Topological data is saved.
Step 3: voltage sag source identification model: corresponding grid topology data when occurring in conjunction with voltage dip event, and
Voltage dip characterizing magnitudes are extracted, voltage sag source is identified in power network topology, the specific steps are as follows:
S701: from 87 voltage dips record in corresponding topological structure of electric extract 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 piece is fallen in electric network fault event time piece,
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 the monitoring point of 220kV
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 is 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: establishing voltage dip event and temporarily drop source table, and it is temporary that the voltage dip record point that S05 step obtains is saved in voltage
Drop source table；
In all monitoring points, the 701 circuit breaker voltage grade highests that West Xia Dynasty villa becomes, 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:
The timeslice of voltage sag source and the timeslice of electric network fault have intersection, if electric network fault is transient fault, from electricity
Lightning stroke data are extracted in net lightning systems；If electric network fault is permanent fault, directly it is judged as that voltage caused by short trouble is temporary
Drop, the specific steps are as follows:
It is obtained from the electric network fault data of extraction, which is permanent fault.The grid equipment of electric network fault influence is enumerated,
Including bus, route, transformer, nearest monitoring point is in voltage dip record set and in the grid equipment of electric network fault influence
701 breakers of certain substation, then the reason of this voltage dip event, is classified as short trouble.
The above is only the preferred embodiment of the present invention, it should be pointed out that: those skilled in the art are come
It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (5)
1. a kind of voltage sag source positioning system of grid equipment topology, which is characterized 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；The grid equipment biography of voltage dip event pooled model, voltage dip event
It broadcasts model and voltage sag source identification model is successively linked in sequence, the voltage sag source identification model connection system side voltage is temporary
Reason classification model and user side voltage sag reason classification model drop；
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: being recorded as originating with a certain voltage dip, according to voltage dip record generation sought around moment one section of duration with
Interior voltage dip record, recurrence all can not find voltage dip record up to front and rear sides, and the voltage sought in duration is temporary
Drop record is put into set；The duration that front and back is sought is timeslice；
S02: the voltage dip set of records ends sought according to step S01 analyzes each voltage dip record, temporary with some voltage
Drop is recorded as originating, and the bus that circulation confirmation voltage dip recording device is monitored directly electrically joins with the presence or absence of voltage class
Knot, the voltage dip record that electric link will be present are classified as one kind；
S03: establishing voltage dip event hash table, timeslice is consistent and there are several voltage dips of direct electric link notes
Record is saved to voltage dip event table.
2. a kind of voltage sag source positioning system of grid equipment topology according to claim 1, which is characterized in that
The grid equipment propagation model of voltage dip event is based on grid equipment model, constructs station equipment primary equipment topology knot
Topological structure between structure and station, the specific steps are as follows:
S101: the power grid account data of synchronised grids device model；
S102: the bus monitored when being occurred using voltage dip event is starting point, with the-the first open circuit of the-the first disconnecting link of bus starting point
The-the second disconnecting link-the first of device exchanges line segment endpoint-exchange line segment-the second and exchanges line segment endpoint-the-the second breaker-the of third disconnecting link
The topology rule of four disconnecting links-bus terminal, recurrence obtain the topological diagram of all voltage dip monitoring records；Recursive base line condition
It is that the voltage class of bus is higher than and is less than setting voltage class by recurrence bus or busbar voltage grade；
S103: topology rule further include: the electric link between recurrence bus and bus；In bus starting point-bus connection switch-bus
Between section the-the first disconnecting link the-the second disconnecting link-the first of the-the first breaker exchange line segment endpoint-exchange line segment-the second exchange line segment endpoint-
The-the four disconnecting links of the-the second breaker of third disconnecting link-bus terminal；Female-the second disconnecting link-the first of first the-the first disconnecting link of positive pole-pair is disconnected
Road device-side mother-third disconnecting link-the first exchanges line segment endpoint-exchange line segment-the second and exchanges the-the four disconnecting link of line segment endpoint-side mother-
Female-the six the-the second positive pole of disconnecting link of second the-the five disconnecting link of breaker-pair；
S104: establishing grid equipment topological structure table, and the corresponding grid topology data of voltage dip event is saved.
3. a kind of voltage sag source positioning system of grid equipment topology according to claim 1, which is characterized in that
Voltage sag source identification model combination voltage dip event corresponding grid topology data when occurring, and extract voltage dip
Characterizing magnitudes identify voltage sag source in power network topology, the specific steps are as follows:
S201: extracting all monitoring points in the topological structure of electric of certain voltage dip event, extracts the associated power grid in each monitoring point
Fault data；
S202: the highest bus monitoring point of voltage class is same monitoring with the most deep voltage dip monitoring point of voltage dip depth
When point, the monitoring point is voltage sag source；
S203: voltage dip records high voltage appearance grade bus monitoring point and the most deep monitoring point of voltage dip depth is not same
Monitoring point, when searching electric network fault data, when voltage dip event time piece is fallen in electric network fault event time piece, with electricity
The monitoring point that net fault bit is equipped with direct electric link is voltage sag source；
S204: voltage dip records high voltage appearance grade bus monitoring point and the most deep monitoring point of voltage dip depth is not same
Monitoring point, when searching for less than electric network fault data, voltage dip depth is most deep and monitoring point of the voltage class less than 220kV is electricity
Source temporarily drops in pressure；
S205: voltage dip records high voltage appearance grade bus monitoring point and the most deep monitoring point of voltage dip depth is not same
Monitoring point, search is 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: establishing voltage dip event and temporarily drop source table, and the voltage dip record point that will acquire is saved in voltage sag source table.
4. a kind of voltage sag source positioning system of grid equipment topology according to claim 1, which is characterized in that
System side voltage sag reason classification model judges system side voltage sag reason and sorts out: the timeslice of voltage sag source
There is intersection with the timeslice of electric network fault, if electric network fault is transient fault, lightning stroke data are extracted from electric network thunder and lightning system；If
Electric network fault is permanent fault, is directly judged as voltage dip caused by short trouble, the specific steps are as follows:
S301: it for the electric network fault of transient fault, is differed before and after the timeslice that the timeslice of voltage sag source is struck by lightning with power grid
Time be set period of time t1, search for the lightning stroke data of lightning systems, with before transient fault in set period of time t1 be struck by lightning electricity
Flowing the thunder and lightning in maximum and electric network fault equipment range setting regions range k is voltage sag reason；
S302: for the electric network fault of permanent fault, the grid equipment of electric network fault influence, including bus, route and change are enumerated
Depressor near the electric network fault of voltage sag source is voltage sag reason in electric network fault list, the reason of by voltage dip
It is classified as short trouble；
S303: the timeslice of voltage dip event can not be matched with electric network fault time of origin piece and the wave character of voltage dip
It is shown as transformer excitation to shove, is then classified as transformer excitation the reason of voltage dip and shoves.
5. a kind of voltage sag source positioning system of grid equipment topology according to claim 1, which is characterized in that
User side voltage sag reason classification model: according to the substation 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 is associated with point
The association analysis between high load capacity and voltage dip is analysed, obtains user side voltage sag reason, specific step is as follows；
S401: synchronised grids large user list and the transmission of electricity outlet of each user and substation information；
S402: according to substation and outlet data, large user's load compositional data in synchronised grids counts large user's high load capacity
Temporal regularity data；
S403: being directed to different types of load data, is according to depth association analysis user side voltage dip event number with the time
According to；
S404: when grid side voltage sag reason and inconsistent user side voltage sag reason, differentiated by wave character.
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| CN109765458A (en) * | 2019-01-16 | 2019-05-17 | 福州大学 | A kind of temporary drop source localization method based on glowworm swarm algorithm |
| CN110137958B (en) * | 2019-05-22 | 2023-01-20 | 深圳供电局有限公司 | User voltage sag analysis method and system |
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