CN109901007A - Low current method for locating single-phase ground fault based on Hierarchical Agent intelligent decision - Google Patents
Low current method for locating single-phase ground fault based on Hierarchical Agent intelligent decision Download PDFInfo
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Abstract
The present invention relates to distribution system grounding fault diagnosis technical field more particularly to a kind of low current method for locating single-phase ground fault based on Hierarchical Agent intelligent decision, include the following steps: to construct the collecting and distributing control framework of power distribution network based on Hierarchical Agent intelligent decision；Establish singlephase earth fault tupe；Pass through the singlephase earth fault situation of a plurality of interconnection of the collecting and distributing control framework real-time monitoring target substation of power distribution network；The collecting and distributing control framework of power distribution network is acquired fault data；The collecting and distributing control framework of power distribution network analyzes fault data；Determine singlephase earth fault region；The collecting and distributing control framework of power distribution network generates sub-switching operation and determines result and be sent to singlephase earth fault region progress sub-switching operation；The application solves the problems such as conventional electrical distribution net singlephase earth fault location efficiency is low, fault signature is unobvious using multi-agent technology.
Description
Technical field
The present invention relates to distribution system grounding fault diagnosis technical fields, more particularly to a kind of Hierarchical Agent that is based on intelligently to determine
The low current method for locating single-phase ground fault of plan.
Background technique
Important component of the power distribution network as electric system carries the electric service function of most power consumers
Can, it is the key that ensure power supply, is the most important link for influencing power supply reliability.At this stage, China's distribution net work structure master
It to be the radial distribution line of single supply, the distribution system neutral point of 10~35kV mostly uses non-effective earthing mode, i.e., neutral
Point is earth-free or through grounding through arc.Such system is when occurring singlephase earth fault, due to that can only pass through direct-to-ground capacitance structure
At circuit, fault current relative load electric current is much smaller, therefore also known as small current neutral grounding system.According to incompletely statistics, in small electricity
In stream ground connection power distribution network, 70% or more short trouble is singlephase earth fault.When an error occurs, due to fault current feature
It is difficult to distinguish, grounding point electric arc is unstable, perfects phase voltage raising and easily leads to the factors such as apparatus insulated breakdown, so that fault section
It is difficult to position, is always the practical problem for influencing China's power distribution network operational reliability and economy.
Power distribution network wide scope, operation control difficulty is larger, and administrative controller switching equipment has a large capacity and a wide range, and maintenance scheduling is complicated.It passes
It unites based on the artificial one-phase earthing failure in electric distribution network processing method for drawing road, far from the development for meeting strong intelligent distribution network
Demand, and the method for locating single-phase ground fault based on power distribution automation main station are still needed at present in face of metrical information point amount greatly minute
It dissipates, the accuracy that fault signature extracts and timeliness, field device install diversity and load in mixture, communication security, information loss, open
Dynamic criterion missing leads to problems such as fault location fail.With the development of intelligent power grid technology, the failure of intelligent distribution network is automatic
Isolation and fault self-recovery function are more and more important, promptly and accurately identify and cut off singlephase earth fault and meet intelligent power distribution network construction
Theory.
Author be Sun Bo et al. publish " ground Fault Location based on transient information is ground
Study carefully ", by being monitored and analyzing to electric and magnetic fields in the document, but electromagnetic field is disturbed ability poor, detection knot
There is a certain error for fruit；Author be Zhang Linli et al. publish " small current grounding fault localization method and its application are ground
Study carefully " (the middle large doctoral thesis of National IP Network -), the document, which is combined by transient state line voltage with zero mould electric current, determines abort situation
Position, but there are computationally intensive, bit rates are low.
Multi-agent technology (Multi Agent Technology) meets power distribution network distribution because of its independence and intelligence
Feature has and is classified the complicated mechanism negotiated control unit is realized in coordination to power grid, utilizes matching between upper and lower grade Agent
Close can fast search obtain fault correlation section, thus realize electric network fault detection and the fast quick-recovery of failure.But it is existing research compared with
It is related to the low current method for locating single-phase ground fault based on MAT less, practical Fault Locating Method is not dissolved into more agencies
In intelligent decision system.Therefore, it is necessary to propose that a kind of new low current singlephase earth fault is fixed based on Hierarchical Agent intelligent decision
Position method.
Summary of the invention
It is intelligently determined in view of this, in view of the deficiencies of the prior art, it is an object of the present invention to provide one kind based on Hierarchical Agent
The low current method for locating single-phase ground fault of plan, solves that conventional electrical distribution net singlephase earth fault location efficiency is low, fault signature
The problems such as unobvious.
In order to achieve the above objectives, the invention adopts the following technical scheme:
Low current method for locating single-phase ground fault based on Hierarchical Agent intelligent decision, includes the following steps:
S1: power distribution network collecting and distributing control framework of the building based on Hierarchical Agent intelligent decision: the collecting and distributing control cage of power distribution network
Structure carries out agent territory division according to loaded network of the electrical network parameter to power distribution network substation and power distribution network substation, from bottom to top
Formed includes physical layer, cooperation layer and the power distribution network physical message fusion architecture for sentencing three layers of layer of control；The electrical network parameter includes institute
Locate voltage class and locating power supply area；
S2: establishing singlephase earth fault tupe, specifically: it is wanted according to the administrative supply network reliability of target substation
It asks and control node quantity, establishes singlephase earth fault tupe, the singlephase earth fault tupe includes master station's generation
Reason concentration sentences control formula and sentences control formula with intelligently collecting and distributing；
S3: pass through the singlephase earth fault of a plurality of interconnection of the collecting and distributing control framework real-time monitoring target substation of power distribution network
Situation, detailed process are as follows: the bus zero sequence electricity of a plurality of interconnection of the collecting and distributing control framework real time monitoring target substation of power distribution network
Information is pressed, when power distribution network collecting and distributing control framework is when sentencing control layer and detecting that the bus residual voltage of target substation is abnormal,
Determine that singlephase earth fault occurs for the interconnection of target substation region within the jurisdiction；
S4: the collecting and distributing control framework of power distribution network is acquired fault data, detailed process are as follows: sentences control layer and carries out the whole network trend
It calculates, and the order that real time information obtains is issued to the physical layer of region within the jurisdiction respectively by cooperation layer, physical layer joins corresponding
The zero-sequence current accidental data information of fault moment is uploaded to corresponding in real time at the position of the switch of winding thread road head end, switching node
Cooperation layer, all or part of data will be uploaded to by cooperation layer according to troubleshooting mode sentences control layer；
S5: the collecting and distributing control framework of power distribution network analyzes fault data, detailed process are as follows: if troubleshooting mode is
Master station agency, which concentrates, sentences control formula, sentences control layer according to network topology, the position of the switch of acquisition, feeder line Power Flow Information and generates full mesh topology
Array, while the accidental data according to the head end zero-sequence current of multiple interconnectors in fault moment generates fault signature array；
If troubleshooting mode, which is that intelligence is collecting and distributing, sentences prosecutor formula, cooperation layer is believed according to network topology, the position of the switch of acquisition, feeder line trend
Formation zone topology arrays are ceased, while the accidental data according to the head end zero-sequence current of multiple interconnectors in fault moment generates
Fault signature array；
S6: determine singlephase earth fault region, detailed process are as follows: sentence the low current of control layer or cooperation layer according to optimization
Singlephase earth fault decision criteria, judges whether singlephase earth fault occurs in administrative area, and carries out fault section location；Sentence
Determine result uniformly to be collected by sentencing control layer, stored；
S7: the collecting and distributing control framework of power distribution network generates sub-switching operation and determines result and be sent to singlephase earth fault region
Carry out sub-switching operation, detailed process are as follows: sentence control layer and determined according to global fault as a result, planning as a whole the administrative global fault of target substation
Information, real-time judge and positioning line fault singlephase earth fault, while separating brake behaviour is issued to faulty line both ends block switch agency
It orders, using full-automatic or semiautomatic fashion isolated fault route, and restores the power supply in non-faulting region.
Further, in the step S1, physical layer includes at least one or more realization data acquisitions, control, communication
The bottom component of function, the bottom component includes line feed terminals FTU, stand institute terminal D TU, distribution transformer terminals TTU, fault detector
And respective switch or measure and control device, the measure and control device include CT and/or PT；
In the step S1, the cooperation layer includes one in voltage class, grid structure, radius of electricity supply and part throttle characteristics
A or multiple factors.
Further, in the step S5, the method for building up of full mesh topology array or region topology array, detailed process
Are as follows:
The incoming switch of multiple interconnector head ends is numbered for node, definition route direction of tide is each feeder line area
The positive direction of section, for single supply radial networks, by the way of node and thereafter track section Unified number, then number of nodes
It is identical as line areas number of segment, and the unique power decanting point of the corresponding track section thereafter of each node, other nodes of section are then function
Rate output point；Full mesh topology array or region topology array may be defined as D=[djk]n×n, wherein n represents the whole network or region institute
The node total number contained, djkIt is defined as follows:
Topology arrays D is an asymmetric battle array, and every a line corresponds to the interconnection of identical number, and each column correspond to identical
The switching node of number.
Further, in step s 5, when monitoring target substation interconnection burst singlephase earth fault, with failure
Track section and the surveyed zero-sequence current transient state mutation pulse amplitude of sound circuit section head end and polarity are characterized criterion, establish needle
N is being contained wherein the fault signature array is defined as vector G to the low current singlephase earth fault location algorithm of power distribution network
G is n dimensional vector in the network of a node, it may be assumed that
G=[g1g2g3…gk]T(k≤n)
Element g in GkIs defined as:
In formula, sgn () is to take sign function, i0kmaxFor the route zero measured in k node after the failure occurred time period t
Sequence current maxima, the time period t are less than 5ms,For faulted phase voltage failure instantaneous moment starting phase angle.
Further, in step s 4, the low current singlephase earth fault decision criteria of the optimization are as follows:
In formula, xjIt is defined as the fault verification characteristic quantity of interconnection section j, D (j :) indicates the jth every trade of topology arrays D
Vector.
Further, it is connected between the physical layer and cooperation layer by terminal communication access net, the terminal communication connects
It networks using optical fiber, EPON, optical Ethernet, GPRS or cdma network communication, the cooperation layer and the backbone sentenced between control layer are logical
Letter net is connected using fiber optic communication mode.
The present invention has the advantage that due to taking above technical scheme
1) present invention includes object using multi-agent technology building based on feed line automatization system framework and monitoring device
It manages layer, cooperation layer and sentences control layer three-layered agency, realize using one-phase earthing failure in electric distribution network positioning strategy as the physical message of target
Fusion architecture.Each hierarchical agency is divided the work with specific task, with equal between layer proxy, has edge calculations ability,
It can make decisions on one's own and control itself behavior, while also maintain number between the agency of different levels, between the different agencies of level
Guarantee the reasonability of each self-decision according to communication.Centralized and distributed excellent of this layering flattening control architecture collection
Point, also balances the deficiency of two ways, and practicability is obvious.
2) it according to the administrative supply network reliability requirement of target substation and control node quantity, flexibly can intelligently select
Troubleshooting mode.When network node is excessive, prosecutor formula is sentenced using intelligence is collecting and distributing, coordinates layer proxy according to each physics in region
The fault message that layer proxy uploads completes the judgement of singlephase earth fault, realizes information taken, processing and event in administrative area
Hinder and determine, and form bootstrapping event of failure signal upload and sentence control layer, sentencing control layer can be directly single-phase according to the progress of event of failure signal
The Global localization of ground fault effectively improves the efficiency of fault verification, mitigates the burden for sentencing control layer and communication network.
3) it using the amplitude of the surveyed zero-sequence current transient state mutation pulse of fault moment and polarity as comprehensive features, overcomes small
Electric current Fault feature of single phase earthing extracts difficult deficiency, the sensitivity of Collection is improved, between capable of reliably detecting
Having a rest property arcing ground fault.
4) the low current singlephase earth fault decision algorithm used optimized is suitable for isolated neutral and through arc suppression coil
It is grounded two ways, criterion is simple, quick, and has higher accuracy.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
Fig. 1 is overall flow schematic diagram of the invention；
Fig. 2 is the distribution network topological structure and corresponding intelligent agent layered structure schematic diagram of the embodiment of the present invention.
Fig. 3 is to press bus three-phase voltage and residual voltage when singlephase earth fault occurs in the embodiment of the present invention in substation
Curve graph.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.It is understood that specific embodiment described herein is used only for explaining the present invention, and
Non- limitation of the invention.In addition it should be noted that, portion related to the present invention is illustrated only for ease of description, in attached drawing
Point rather than full content.
Fig. 1 is that a kind of low current singlephase earth fault based on Hierarchical Agent intelligent decision provided in an embodiment of the present invention is fixed
The overall flow figure of position method.Although should be noted that flow chart will before example embodiments are discussed in greater detail
Operations (or step) are described as sequential processes mode, but many operations can be by concurrently, concomitantly or simultaneously
Implement.In addition, the sequence of operations can be rearranged.
In certain A class power supply area shown in Fig. 2, the administrative part 10kV medium-voltage distribution circuit topological diagram of a 110kV substation,
It is single supply radial distribution networks network.It is provided in this embodiment to be based on Hierarchical Agent in conjunction with Fig. 1 process and Fig. 2 distribution network
The low current method for locating single-phase ground fault of intelligent decision specifically includes that steps are as follows:
S1: power distribution network collecting and distributing control framework of the building based on Hierarchical Agent intelligent decision, specifically: match shown in foundation Fig. 2
The voltage class and power supply area topological network of electric network carry out the loaded network of power distribution network substation and power distribution network substation
Agent territory divides, and is formed including physical layer, cooperation layer and the power distribution network physical message fusion architecture for sentencing control layer three-layered agency,
In:
Physical layer is bottom component agency, represents the various remote monitorings of distribution network, control unit, is realized in data acquisition
It passes, order issues the functions such as control, communication.Specifically, it shares 8 detection and control terminals agency in Fig. 2, function and surveys, controlled
Measure corresponding its installation position meeting different from: Agent 1 mainly completes pressure bus three-phase voltage in monitoring objective substation and (is used for
Synthesize bus residual voltage), the zero-sequence current at bus outlet switch 1, execute the function such as 1 point of switch/combined floodgate order, data communication
Can, collect and handle bus PT, the measuring and control datas such as DTU at switch 1；2~Agent of Agent 8 is mainly used for monitoring corresponding contact
Electric current, voltage, the power-angle signal of line head end incoming switch, and information is uploaded into respective cooperation layer regional agency, while responding association
The control instruction for adjusting layer proxy to issue realizes the function of DTU or FTU.Each terminal agent need to be adapted to the safety of corresponding monitoring device
Operation, communication response constraint, reach the objective optimizations condition such as economical and practical, security protection；
Cooperation layer is interlayer region agency, comprising according to voltage class, grid structure, radius of electricity supply, part throttle characteristics etc.
The multiple regions grade agency that factor is divided, for collecting, analyzing and transmitting the operation of power networks fault message of region within the jurisdiction, can make
For edge Internet of Things agency, zone fault type and position are determined, while coordinating to sentence control layer dispatch command, there is edge
The functions such as calculating, unified bottom component proxy data model, two-way communication, monitoring；It can between each regional agency in cooperation layer
Carry out information exchange, distributed intelligence calculates, collaboration promotion fault location accuracy.In conjunction with the above rule, by the present embodiment electricity
Net topology, detection and control terminal Agent 3 are incorporated into regional agency 1, and detection and control terminal Agent 2, Agent 5, Agent 6 are incorporated into area
Domain agency 2, detection and control terminal Agent, 4, Agent 7, Agent 8 are incorporated into regional agency 3；Meanwhile in view of detection and control terminal Agent
1 functional importance, data will directly be uploaded Pan Kongceng master station agency by communication network；
Control layer is sentenced for master station, top layer agency, is the dispatching control center of target substation, there is the whole network status monitoring, tide
Stream calculation function, by receiving the operation situation data after coordinating layer proxy autonomy optimization and fault location as a result, according to selected
Troubleshooting mode criterion, publication global coordination controls signal, quickly isolates failure, restores non-faulting block supply.Sentence control
Layer proxy needs the amplitude and phase of the medium voltage side bus residual voltage of real-time monitoring target substation.
S2: control layer is sentenced according to the administrative supply network reliability requirement of target substation and failure response time, is reasonably selected
Singlephase earth fault tupe, singlephase earth fault tupe include that master station agency concentrates and sentences control formula and intelligence collecting and distributing sentences control
For A+, A class or part B class power supply area, high, selection is required in view of power supply reliability and feeder automation response speed likes:
Master station agency, which concentrates, sentences prosecutor formula；C class and following power supply area are selected from economy and practicability by coordination layer proxy
Subregion determine failure and report, master station agency concentrates the intelligence of regulation collecting and distributing to sentence prosecutor formula.Specific singlephase earth fault processing
Mode, the administrative supply network physical fault of visual object substation respond demand, carry out flexible choice.
Shown in Fig. 2, in certain A class power supply area, the administrative part 10kV medium-voltage distribution circuit of a 110kV substation is constituted
Single supply radial distribution networks network, monitoring node share 8, examine from power supply reliability, data volume, communication bandwidth and actual effect
Consider, master station agency is easily selected to concentrate the troubleshooting mode for sentencing prosecutor formula.What the multiple regions agency of cooperation layer measured terminal
Fault detection information, which directly uploads, sentences control layer, is determined by sentencing control layer according to grid topology and the preset algorithm progress failure overall situation
Position, and by remote control or it is manually isolated fault zone, restore non-faulting block supply.
What needs to be explained here is that it is huge for number of nodes and general distribution network is required to power supply reliability, it is comprehensive
Assessment system communication capacity and Fault Isolation delay requirement are closed, cooperation layer multiple regions agency is easily selected to carry out subregional judgement
Failure simultaneously reports to and sentences control layer,, will be under fault self-recovery management function using the edge calculations ability of regional agency under the mode
It is heavy, master station's computation burden can be effectively reduced, the dependence to communication performance is reduced.
S3: pass through the singlephase earth fault of a plurality of interconnection of the collecting and distributing control framework real-time monitoring target substation of power distribution network
Situation, detailed process are as follows: in Fig. 2, when in target substation administrative area interconnection 7 occur singlephase earth fault when, for convenient for
Singlephase earth fault initial time t is arranged in analysis0The starting phase angle in the A phase of interconnection 7 occurs for=0.02s, failureGround resistance Rg=10 Ω；System neutral is through grounding through arc, detuning degree ν=- 10% (overcompensation), extinguishing arc
The active component of coil is 1.5%.
Fault moment presses bus three-phase voltage U in substationA、UB、UCAnd corresponding residual voltage U0Curve is as shown in Figure 3.t0
=0.02s, the A phase of interconnection 7 leads to bus A phase voltage rapid drawdown through 10 Ω resistance eutral groundings, and two non-faulting phases (B phase and C
Phase) voltage magnitude increase respectively for this with respect to A phase line voltage；Bus residual voltage U0Amplitude is instantaneously by 0 transition in failure
About 21kV sentences control layer and singlephase earth fault occurs in decision-making system accordingly.
S4: the collecting and distributing control framework of power distribution network is acquired fault data, specifically: sentence control layer and starts the whole network trend meter
It calculates, issues real time information acquisition to administrative physical layer agent respectively by multiple coordination layer proxies and order, in embodiment, each physics
Layer detection and control terminal agency leads to the data such as zero-sequence current Sudden Changing Rate at each interconnection incoming switch location information, each switching node
It crosses terminal access net and is uploaded to corresponding cooperation layer in real time, fault data is all uploaded to by cooperation layer by backbone communications sentences control
Layer.The zero-sequence current maximum sudden change amount data of such as switch 2, the location information of switch 5 and switch 6 and fault moment, will pass through area
Domain intelligent agent 2, which is uploaded to, sentences control layer.
S5: the collecting and distributing control framework of power distribution network analyzes fault data, specifically: the present embodiment is acted on behalf of using master station
The troubleshooting mode for sentencing control formula is concentrated, control layer is sentenced and generates the position according to full mesh topology, respectively switched and feeder line Power Flow Information
Full mesh topology array, the method for building up of full mesh topology array are as follows:
Single supply radial distribution networks network, trend has single-phase flow characteristic, with the inlet wire of multiple interconnector head ends
Switch is numbered for node, while defining the positive direction that route direction of tide is each feeder section；Using node and line thereafter
The mode of road section Unified number, then number of nodes is identical as line areas number of segment, as shown in Figure 3.The corresponding line areas thereafter of each node
The unique power decanting point of section, other nodes of section are then power output point.Full mesh topology array is defined as D=[djk]n×n,
Middle n represents node total number contained by region, djkIt is defined as follows:
The distribution network topology arrays being made of 1~interconnection of interconnection 8 can be obtained as a result, are as follows:
Full mesh topology array D is an asymmetric battle array, and every a line corresponds to the interconnection of identical number, and each column correspond to
The switching node of identical number.
Meanwhile control layer is sentenced when monitoring route burst singlephase earth fault, with failure interconnection and perfect interconnection head
It holds surveyed zero-sequence current transient state mutation pulse amplitude and polarity to be characterized criterion, establishes the low current single-phase earthing event for the whole network
Hinder location algorithm.Wherein, the fault signature array is defined as G, and G is 8 dimensional vectors in the network containing 8 nodes, it may be assumed that
G=[g1g2g3…gk]T(k≤8)
Element g in GkIs defined as:
In formula, sgn () is to take sign function, i0kmaxFor what is measured in k (k≤8) node after the failure occurred time period t
Route zero-sequence current maximum value, the time period t are less than 5ms,For faulted phase voltage failure instantaneous moment initial phase
Angle.
In the present embodiment, after singlephase earth fault generation in the window phase of 5ms, the zero sequence measured at each switching node is electric
Transient state mutation pulse maximum and polarity are flowed, as shown in table 1, wherein current polarity is with the reference of residual voltage direction, relative time
It is positive otherwise is negative in axial direction.
The transient zero-sequence current maximum value and polarity of each switching node of table 1
The distribution network being made of 1~interconnection of interconnection 8 can be obtained as a result, when singlephase earth fault occurs for interconnection 7
Fault signature array are as follows:
G=[1 001001 0]T
When this fault signature Array Construction, the amplitude and polarity of zero-sequence current transient state pulse have been considered as a whole, enhance event
Hinder the confidence level of feature extraction, while suitable for isolated neutral and through two kinds of systems of grounding through arc.
S6: determining singlephase earth fault region, specifically: sentence low current singlephase earth fault of the control layer according to optimization
Decision criteria carries out section positioning to singlephase earth fault, determines that route, method occur for failure are as follows:
In formula, xjBe defined as the fault verification characteristic quantity of track section j, D (j :) indicate the jth every trade of topology arrays D to
Amount.
X can be obtained as a result,1=x2=x3=x4=x5=x6=x8=0, only x7=1, therefore singlephase earth fault should occur
It is consistent with fault setting result at interconnection 7, determine that result is uniformly collected by sentencing control layer, stored.The judgement of this optimization is quasi-
Then, logical operation is simple, can effectively promote fault location speed, mitigates master station system operand.
S7: the collecting and distributing control framework of power distribution network generates sub-switching operation and determines result and be sent to singlephase earth fault region
It carries out sub-switching operation: sentencing control layer and determined according to global fault as a result, the pool administrative global fault's information of target substation, sentences in real time
Disconnected and positioning line fault singlephase earth fault, while sub-switching operation order is issued to 7 both ends block switch of failure interconnection agency, it adopts
With full-automatic or semiautomatic fashion isolated fault route, the power supply in fast quick-recovery non-faulting region.
In addition, passing through terminal communication access net between physical layer agent and coordination layer proxy in the selection of communication mode
Connection, can be used fiber optic communication mode (EPON or optical Ethernet), for the region of fiber cable laying difficulty, wireless public network can be used
Mode (GPRS/CDMA network) is as supplement connection；The backbone communications coordinating layer proxy and sentencing between control layer proxy should use
Fiber optic communication mode connects, and can effectively promote real-time synchronization precision of the whole network node in fault characteristic value acquisition.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (6)
1. the low current method for locating single-phase ground fault based on Hierarchical Agent intelligent decision, which is characterized in that including walking as follows
It is rapid:
S1: building the collecting and distributing control framework of power distribution network based on Hierarchical Agent intelligent decision: the collecting and distributing control framework of power distribution network according to
Agent territory division is carried out according to loaded network of the electrical network parameter to power distribution network substation and power distribution network substation, is formed from bottom to top
Including physical layer, cooperation layer and the power distribution network physical message fusion architecture for sentencing three layers of layer of control；The electrical network parameter includes locating electricity
Press grade and locating power supply area；
S2: establishing singlephase earth fault tupe, specifically: according to the administrative supply network reliability requirement of target substation and
Control node quantity, establishes singlephase earth fault tupe, and the singlephase earth fault tupe includes master station's agency's collection
In sentence control formula and intelligence collecting and distributing sentences control formula；
S3: pass through the singlephase earth fault shape of a plurality of interconnection of the collecting and distributing control framework real-time monitoring target substation of power distribution network
Condition, detailed process are as follows: the bus residual voltage of a plurality of interconnection of the collecting and distributing control framework real time monitoring target substation of power distribution network
Information is sentenced when power distribution network collecting and distributing control framework is when sentencing control layer and detecting that the bus residual voltage of target substation is abnormal
Set the goal substation region within the jurisdiction interconnection occur singlephase earth fault；
S4: the collecting and distributing control framework of power distribution network is acquired fault data, detailed process are as follows: sentences control layer and carries out the whole network trend meter
It calculates, and the order that real time information obtains is issued to the physical layer of region within the jurisdiction respectively by cooperation layer, physical layer is got in touch with corresponding
The zero-sequence current accidental data information of fault moment is uploaded to corresponding association in real time at the position of the switch of route head end, switching node
Layer is adjusted, all or part of data will be uploaded to by cooperation layer according to troubleshooting mode sentences control layer；
S5: the collecting and distributing control framework of power distribution network analyzes fault data, detailed process are as follows: if troubleshooting mode is master station
Agency, which concentrates, sentences control formula, sentences control layer according to network topology, the position of the switch of acquisition, feeder line Power Flow Information and generates full mesh topology battle array
Column, while the accidental data according to the head end zero-sequence current of multiple interconnectors in fault moment generates fault signature array；If
Troubleshooting mode, which is that intelligence is collecting and distributing, sentences prosecutor formula, and cooperation layer is according to network topology, the position of the switch of acquisition, feeder line Power Flow Information
Formation zone topology arrays, while the accidental data according to the head end zero-sequence current of multiple interconnectors in fault moment generates event
Hinder character array；
S6: determine singlephase earth fault region, detailed process are as follows: the low current for sentencing control layer or cooperation layer according to optimization is single-phase
Ground fault decision criteria, judges whether singlephase earth fault occurs in administrative area, and carries out fault section location；Determine knot
Fruit is uniformly collected by sentencing control layer, is stored；
S7: the collecting and distributing control framework of power distribution network generates sub-switching operation and determines result and be sent to the progress of singlephase earth fault region
Sub-switching operation, detailed process are as follows: sentence control layer and determined according to global fault as a result, planning as a whole the administrative global fault's letter of target substation
Breath, real-time judge and positioning line fault singlephase earth fault, while sub-switching operation is issued to faulty line both ends block switch agency
Order, using full-automatic or semiautomatic fashion isolated fault route, and restores the power supply in non-faulting region.
2. the low current method for locating single-phase ground fault according to claim 1 based on Hierarchical Agent intelligent decision,
Be characterized in that: in the step S1, physical layer includes at least one or more realization data acquisitions, controls, the bottom of communication function
Layer elements, the bottom component include line feed terminals FTU, the institute terminal D TU that stands, distribution transformer terminals TTU, fault detector and accordingly open
It closes or measure and control device, the measure and control device includes CT and/or PT；
In the step S1, the cooperation layer include one in voltage class, grid structure, radius of electricity supply and part throttle characteristics or
Multiple factors.
3. the low current method for locating single-phase ground fault according to claim 1 based on Hierarchical Agent intelligent decision,
It is characterized in that: in the step S5, the method for building up of full mesh topology array or region topology array, detailed process are as follows:
The incoming switch of multiple interconnector head ends is numbered for node, defining route direction of tide is each feeder section
Positive direction, for single supply radial networks, by the way of node and thereafter track section Unified number, then number of nodes and line
Road sector number is identical, and the unique power decanting point of the corresponding track section thereafter of each node, other nodes of section are then that power is defeated
Point out；Full mesh topology array or region topology array may be defined as D=[djk]n×n, wherein n is represented contained by the whole network or region
Node total number, djkIt is defined as follows:
Topology arrays D is an asymmetric battle array, and every a line corresponds to the interconnection of identical number, and each column correspond to identical number
Switching node.
4. the low current method for locating single-phase ground fault according to claim 1 based on Hierarchical Agent intelligent decision,
It is characterized in that: in step s 5, when monitoring target substation interconnection burst singlephase earth fault, with faulty line section
It is characterized criterion with the surveyed zero-sequence current transient state mutation pulse amplitude of sound circuit section head end and polarity, establishes and is directed to power distribution network
Low current singlephase earth fault location algorithm, wherein the fault signature array is defined as vector G, containing n node
G is n dimensional vector in network, it may be assumed that
G=[g1 g2 g3 … gk]T(k≤n)
Element g in GkIs defined as:
In formula, sgn () is to take sign function, i0kmaxFor the route zero-sequence current measured in k node after the failure occurred time period t
Maximum value, the time period t are less than 5ms,For faulted phase voltage failure instantaneous moment starting phase angle.
5. the low current method for locating single-phase ground fault according to claim 1 based on Hierarchical Agent intelligent decision,
It is characterized in that: in step s 4, the low current singlephase earth fault decision criteria of the optimization are as follows:
In formula, xjIt is defined as the fault verification characteristic quantity of interconnection section j, D (j :) indicates the jth every trade vector of topology arrays D.
6. the low current method for locating single-phase ground fault according to claim 1 based on Hierarchical Agent intelligent decision,
It is characterized in that: being connected between the physical layer and cooperation layer by terminal communication access net, the terminal communication access net uses
Optical fiber, EPON, optical Ethernet, GPRS or cdma network communication, the cooperation layer and the backbone communications sentenced between control layer use
Fiber optic communication mode connects.
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