CN106022590A - Active power distribution network voltage quality evaluating method and device - Google Patents
Active power distribution network voltage quality evaluating method and device Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
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- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06395—Quality analysis or management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention discloses an active power distribution network voltage quality evaluating method and device. The active power distribution network voltage quality evaluating method comprises steps of: executing statistic simulation on the current states of elements of the active power distribution network and the duration that the elements of the active power distribution network are in the current states in order to obtain a simulation result; classifying the load nodes of the active power distribution network according to the simulation result to obtain a classification result; determining the topological structure of the classification result to obtain a determination result; establishing a preset model of the active power distribution network according to the classification result and the determination result; processing the preset model to obtain the voltage distribution information of the load nodes; and performing statistics on the voltage distribution information to obtain a voltage quality evaluation result of the active power distribution network. The method and device reduce a difficulty in accurate evaluation of the active power distribution network voltage quality in an active power distribution network planning process.
Description
Technical field
The present invention relates to field of power, in particular to the quality of voltage appraisal procedure of a kind of active power distribution network
And device.
Background technology
At present, distributed new is the key character of a new generation's power system, supports that new forms of energy have developed the most rapidly
Become the important core of future source of energy plan.Along with the large-scale development such as distributed power source and electric automobile, power distribution network by
Passive control is transitioned into and actively controls to be one of following developmental pattern and direction, and active power distribution network will become intelligent power distribution
The core of net development.
Along with the kind of distributed power source and being on the increase of quantity, power distribution network occurs in that due to distributed power source self not
Definitiveness and the power quality problem that causes.Additionally, the ad hoc network character of active power distribution network and operation characteristic, and
Comprise numerous energy storage device therein, detection controls equipment, nonlinear multivariable load all makes distribution network electric energy quality problem
Producing cause and spread scope had many new features, such as, distributed power source generated output and load are in the time
Not mating spatially, the main problem caused is that the power being likely to occur send, and may make to a certain extent
Become voltage deviation；Distributed power source and nonlinear multivariable load, when power electronic equipment accesses, can inject humorous to distribution
Ripple electric current causes voltage distortion etc..
Different from the purpose of operation phase electricity quality evaluation, planning stage electricity quality evaluation is primarily directed to planning side
The formulation of case and selection, lay particular emphasis on and estimate power quality problem.In planning process, it is impossible to obtain actual motion number
According to, it is necessary to considering the specific condition of direct-current micro-grid planning stage and the particularity of power quality problem, it is fixed typically can to use
Property and the method quantitatively combined, such as analytic hierarchy process (AHP), Fuzzy Evaluation Method etc., or carry out system based on projecting parameter
Modeling and simulating, relies on simulation result to carry out qualitative assessment.
During Electric Power Network Planning, consider that power quality index has become as a kind of trend.At active power distribution network planning process
In, it is impossible to obtain actual operating data or detailed simulation parameter, the accurate Pre-Evaluation difficulty to quality of voltage.
For in correlation technique in active power distribution network planning process, in active power distribution network planning process, it is not easy to right
Quality of voltage in active power distribution network carries out the problem of accurate evaluation, the most not yet proposes effective solution.
Summary of the invention
Present invention is primarily targeted at quality of voltage appraisal procedure and the device that a kind of active power distribution network is provided, with at least
In solution correlation technique in active power distribution network planning process, it is not easy to the quality of voltage in active power distribution network is carried out standard
The really problem of assessment.
To achieve these goals, according to an aspect of the invention, it is provided the quality of voltage of a kind of active power distribution network
Appraisal procedure.The quality of voltage appraisal procedure of this active power distribution network includes: the current state to the element of active power distribution network
The persistent period being in current state with the element of active power distribution network performs statistical simulation, obtains analog result；According to mould
Intend result the load bus of active power distribution network is classified, obtain classification results；Determine the topological structure of classification results,
Obtain determining result；According to classification results and determine that result sets up the preset model of active power distribution network；Preset model is held
Row processes, and obtains the voltage's distribiuting information of load bus；Voltage's distribiuting information is performed statistics, obtains active power distribution network
Quality of voltage assessment result.
Further, the current state of element and the element of active power distribution network to active power distribution network are in current state
Persistent period performs statistical simulation, obtains analog result and includes: to the current state of the element of active power distribution network be in
The persistent period of current state probability distribution in active power distribution network performs sampling, obtains the element of active power distribution network
Status switch；Running status sequence and the system of active power distribution network of the system of active power distribution network is determined according to status switch
Duration time sequence.
Further, according to analog result, the load bus of active power distribution network is classified, obtains classification results and include:
The duration time sequence of the running status sequence of the system according to active power distribution network and the system of active power distribution network selects active
The running status of the system of power distribution network；Determine the adjacency matrix of the network line topology of active power distribution network under operation；
Obtaining source-lotus minimal path sets according to adjacency matrix, wherein, source-lotus minimal path sets is the internodal minimal path of arbitrary load
Collection；According to source-lotus minimal path sets, load bus is classified, obtain network load set of node, isolated island load bus collection,
Interruptible load set of node.
Further, it is determined that the topological structure of classification results, obtain determining that result includes: when classification results is that network is born
During lotus set of node, determine active power distribution network and mesh portions topological structure；When classification results is isolated island load bus collection
Time, according to adjacency matrix and source-lotus minimal path sets, according to connected domain, load bus is performed polymerization, obtain isolated island load
The isolated island load bus subset of set of node, and determine distributed power source, load and the storage that isolated island load bus subset includes
Can device.
Further, it is determined that the topological structure of classification results, obtain determining that result includes: calculate according to BFS
Method, adjacency matrix, isolated island load bus collection and source-lotus minimal path sets perform polymerization according to connected domain to load bus,
To the isolated island load bus subset of isolated island load bus collection, and determine and there is the grid-connected of communication paths with public power distribution network
Point set.
Further, according to classification results with determine that result is set up the preset model of active power distribution network and included: according to classification
Result and determine result select active power distribution network operating condition in running；Obtain operating condition at active distribution
Probability distribution information in net；Obtain distributed power source and the load access information when accessing via power electronic equipment；
Set up the preset model including probability distribution information and access information.
Further, according to classification results with after determining the preset model that result sets up active power distribution network, this is active
The quality of voltage appraisal procedure of power distribution network also includes: obtain parameter and the input/output information of load of load；According to dividing
The input/output information of cloth power supply, the parameter of load and load determines for representing that distributed power source and load are active
The probability Distribution Model of the probability of distribution in power distribution network.
To achieve these goals, according to a further aspect in the invention, it is provided that the quality of voltage of a kind of active power distribution network
Apparatus for evaluating.The quality of voltage apparatus for evaluating of this active power distribution network includes: analogue unit, for active power distribution network
The current state of element and the element of active power distribution network are in the persistent period execution statistical simulation of current state, obtain mould
Intend result；Taxon, for classifying the load bus of active power distribution network according to analog result, is classified
Result；Determine unit, for determining the topological structure of classification results, obtain determining result；Set up unit, for root
According to classification results and determine that result sets up the preset model of active power distribution network；Processing unit, for performing preset model
Process, obtain the voltage's distribiuting information of load bus；Statistic unit, for voltage's distribiuting information is performed statistics,
Quality of voltage assessment result to active power distribution network.
Further, this analogue unit includes: decimation blocks, for the current state of the element of active power distribution network and
It is in persistent period of current state probability distribution in active power distribution network and performs sampling, obtain the unit of active power distribution network
The status switch of part；First determines module, for determining the running status of the system of active power distribution network according to status switch
The duration time sequence of the system of sequence and active power distribution network.
Further, this taxon includes: select module, for the running status of the system according to active power distribution network
The duration time sequence of the system of sequence and active power distribution network selects the running status of the system of active power distribution network；Second is true
Cover half block, for determining the adjacency matrix of the network line topology of active power distribution network under operation；Acquisition module,
For obtaining source-lotus minimal path sets according to adjacency matrix, wherein, source-lotus minimal path sets is that arbitrary load is internodal
Path collection；Sort module, for classifying load bus according to source-lotus minimal path sets, obtains network load node
Collection, isolated island load bus collection, interruptible load set of node.
By the present invention, the current state of element and the element of active power distribution network to active power distribution network is used to be in currently
The persistent period of state performs statistical simulation, obtains analog result；According to analog result, the load of active power distribution network is saved
Point is classified, and obtains classification results；Determine the topological structure of classification results, obtain determining result；According to classification knot
Fruit and determine that result sets up the preset model of active power distribution network；Preset model is performed process, obtains the electricity of load bus
Pressure distributed intelligence；Voltage's distribiuting information is performed statistics, obtains the quality of voltage assessment result of active power distribution network, reach
Reduce the effect of the difficulty that the quality of voltage in active power distribution network is carried out accurate evaluation.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the quality of voltage appraisal procedure of active power distribution network according to a first embodiment of the present invention；
Fig. 2 is the flow chart of the quality of voltage appraisal procedure of active power distribution network according to a second embodiment of the present invention；And
Fig. 3 is the quality of voltage apparatus for evaluating of active power distribution network according to embodiments of the present invention.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order to make those skilled in the art be more fully understood that the application scheme, below in conjunction with in the embodiment of the present application
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present application, it is clear that described embodiment
It is only the embodiment of the application part rather than whole embodiments.Based on the embodiment in the application, ability
The every other embodiment that territory those of ordinary skill is obtained under not making creative work premise, all should belong to
The scope of the application protection.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that this
The data that sample uses can be exchanged in the appropriate case, in order to embodiments herein described herein.Additionally, term
" include " and " having " and their any deformation, it is intended that cover non-exclusive comprising, such as, comprise
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to those steps clearly listed
Rapid or unit, but can include that the most clearly list or intrinsic for these processes, method, product or equipment
Other step or unit.
Embodiments provide the quality of voltage appraisal procedure of a kind of active power distribution network.
Fig. 1 is the flow chart of the quality of voltage appraisal procedure of active power distribution network according to a first embodiment of the present invention.Such as figure
Shown in 1, the quality of voltage appraisal procedure of this active power distribution network comprises the following steps:
Step S101, the current state of element and the element of active power distribution network to active power distribution network are in current state
Persistent period performs statistical simulation, obtains analog result.
The persistent period that the current state of element of active power distribution network and the element of active power distribution network are in current state holds
Row statistical simulation, obtains analog result.Active power distribution network is carried out multimode simulation, Monte Carlo-state can be used
Time sampling method, DSMC (Monte Carlo Method), also referred to as statistical simulation methods, is a kind of
It is the very important numerical computation method of class instructed with Probability Statistics Theory, is by using random number (or more often
The pseudo random number seen) method that solves a lot of computational problem.The determining that property algorithm corresponding with it, is asked when solving
Topic is the probability that certain random event occurs, or during certain expectation of a random variable, the side tested by certain
Method, with the probability of this random event of Frequency Estimation that this event occurs, or obtains some of this stochastic variable
Numerical characteristic, and as the solution of problem.
The element of active power distribution network, that is, network element, according to planning stage active power distribution network circuit-equipment configuration,
Generally assume that the element initial time of active power distribution network is in running status, to unitary every in the system of active power distribution network
Part rests on the persistent period of current state and is sampled, and persistent period status switch is general by element fault and repair time
Rate is distributed, and backstepping simulation obtains.Enter with the probability distribution of persistent period based on to the element state of active power distribution network network
Line sampling, be comprehensively given the status switch of each element be given the running status of the system of active power distribution network in total period-
Duration time sequence.
Step S102, classifies to the load bus of active power distribution network according to analog result, obtains classification results.
The persistent period of current state it is in the current state of the element to active power distribution network and the element of active power distribution network
Perform statistical simulation, after obtaining analog result, according to analog result, the load bus of active power distribution network classified,
Obtain classification results.Load bus is also called PQ node, the injection active power of given node and injection reactive power,
And node voltage phasor is waited to ask.This category node (includes carrying on node corresponding to the pure load bus in real system
Have load), the electromotor node (including on node with load) that all gives of meritorious and idle output, and contact joint
Point (injecting gains merit is equal to zero with idle).Active power distribution network can be selected according to running status-duration time sequence
System running state, load bus is classified, obtains classification results.
According to the status switch of each element, be comprehensively given system in total period to active power distribution network running status with
Duration time sequence select active power distribution network system running state, it is possible to use network line topological adjacency battle array obtain
Source-lotus minimal path sets, classifies to load bus, obtains classification results, and this classification results can be grid-connected load joint
Point set, isolated island load bus collection and interruptible load set of node.
Step S103, determines the topological structure of classification results, obtains determining result.
According to analog result, the load bus of active power distribution network is being classified, after obtaining classification results, determining point
The topological structure of class result, obtains determining result.Topological structure is the interconnective form of each website in network, opens up
Flutter structure and have bus-type topology, Star topology, ring topology, tree topology and their mixed type, to classification knot
Fruit runs topological structure identification, for grid-connected load bus collection, determines grid-connected partial-topology and configuration；Isolated island is born
Lotus set of node, is polymerized by connected domain node each to network according to adjacent battle array, thus filters out isolated island Node subsets,
Determine distributed power source, load and energy storage device that isolated island Node subsets is comprised.
Step S104, according to classification results and determine that result sets up the preset model of active power distribution network.
Determining the topological structure of classification results, after obtaining determining result, according to classification results and determine that result is set up
The preset model of active power distribution network, can set up network-component space submodel, that is, set up containing distributed power source with
Load access information, the network-component space submodel of operating condition probability distribution information, plan according to active power distribution network
The distributed power source in stage, load basic parameter and input-output characteristic, thus estimate the general of distributed power source and load
Rate distributed model.
Step S105, performs process by preset model, obtains the voltage's distribiuting information of load bus.
According to classification results with after determining the preset model that result sets up active power distribution network, at preset model execution
Reason, obtains the voltage's distribiuting information of load bus.To active power distribution network multi-state information in running according to opening up
Flutter proximity and carry out grouping parallel process and acceleration process.To each similar network sample in packet, choose one of them
Network sample, as network base, carries out three phase fronts and pushes back for probabilistic load flow and probability harmonic flow calculation, it is thus achieved that joint
The each phase voltage distribution character of point；To network sample variation in group, use penalty method, carry out three phase fronts respectively and push back generation
Probabilistic Load Flow accelerates with probability harmonic trend, thus gets other network sample correspondence each phase voltage of operating mode lower node and divide
Cloth characteristic, obtains the actual operating data of active power distribution network and detailed simulation parameter.
Step S106, performs statistics to voltage's distribiuting information, obtains the quality of voltage assessment result of active power distribution network.
Preset model is being performed process, after obtaining the voltage's distribiuting information of load bus, voltage's distribiuting information is being held
Row statistics, obtains the quality of voltage assessment result of active power distribution network, can be to the joint of each operating condition of active power distribution network
Point voltage distributed intelligence is added up by operating condition probability distribution information, thus obtains active power distribution network in the planning stage
The assessment result that the quality of voltage of active power distribution network is estimated.Quality of voltage is by virtual voltage and desired voltage
Deviation, the most qualified to reflect the electric power that power supply department distributes to user, this quality of voltage includes voltage deviation, electricity
Pressure frequency departure, Voltage unbalance, voltage transients, voltage fluctuation and flicker, voltage temporarily will be with interruption, voltages
Harmonic wave, voltage trap, under-voltage, overvoltage etc..
Electricity quality evaluation is based on the actual measurement to system electrical operational factor or to be obtained substantially by modeling and simulating
After data, characteristic index every to the quality of power supply is made evaluating and whether it being met code requirement and is examined or check and infer
Process, it is possible to for active power distribution network planning, build and run important reference frame is provided.With operation phase electric energy
The purpose of quality evaluation is different, and planning stage electricity quality evaluation is primarily directed to formulation and the selection of programme, side
Overweight and power quality problem is estimated.In planning process, the actual operating data of active power distribution network can be obtained,
And the method that combination of qualitative and quantitative analysis can be used, such as, analytic hierarchy process (AHP), Fuzzy Evaluation Method etc., or base
Carry out system modeling and simulation in projecting parameter, rely on simulation result that active power distribution network is carried out qualitative assessment, it is achieved that to examine
The specific condition considering the planning stage and the method setting up comprehensive assessment, combine with the system running state of active power distribution network,
Thus the planning for active power distribution network provides corresponding feedback with designing, in order to revised planning strategy in time, thus keep away
Exempt from adjusting again after engineering is built up, improve the economic benefit of engineering.
This embodiment is by being in current state to the current state of the element of active power distribution network and the element of active power distribution network
Persistent period perform statistical simulation, obtain analog result；According to analog result, the load bus of active power distribution network is entered
Row classification, obtains classification results；Determine the topological structure of classification results, obtain determining result；According to classification results and
Determine that result sets up the preset model of active power distribution network；Preset model is performed process, and the voltage obtaining load bus divides
Cloth information；Voltage's distribiuting information is performed statistics, obtains the quality of voltage assessment result of active power distribution network, reached
In active power distribution network planning process, reduce the effect of the difficulty that the quality of voltage in active power distribution network is carried out accurate evaluation.
Current state and the element of active power distribution network as the optional embodiment of one, to the element of active power distribution network
The persistent period being in current state performs statistical simulation, obtains analog result and includes: to the element of active power distribution network
Current state and be in persistent period of current state probability distribution in active power distribution network and perform sampling, obtains active
The status switch of the element of power distribution network；Determine the running status sequence of the system of active power distribution network according to status switch and have
The duration time sequence of the system of source power distribution network.
The persistent period that the current state of element of active power distribution network and the element of active power distribution network are in current state holds
Row statistical simulation, can carry out multimode simulation to active power distribution network, this multimode simulation can use Monte Carlo-
State for time sampling method.Obtain current state and the probability distribution of persistent period of the network element of active power distribution network, right
The current state of network element and the probability distribution of persistent period in active power distribution network are sampled, and obtain sample of sampling,
Element according to sampling sample acquisition active power distribution network is in the status switch of current state, can be with integrated active power distribution network
The status switch of each element provide the running status-duration time sequence of system in total period.
As the optional embodiment of one, according to analog result, the load bus of active power distribution network is classified,
Include to classification results: according to continuing of the system of the running status sequence of the system of active power distribution network and active power distribution network
Time series selects the running status of the system of active power distribution network；Determine the grid line of active power distribution network under operation
The adjacency matrix of road topology；Obtaining source-lotus minimal path sets according to adjacency matrix, wherein, source-lotus minimal path sets is any
Minimal path sets between load bus；According to source-lotus minimal path sets, load bus is classified, obtain network load node
Collection, isolated island load bus collection, interruptible load set of node.
According to running status-duration time sequence, select the running status of the system of active power distribution network, utilize active distribution
The adjacent battle array of net network obtains source-lotus minimal path sets, wherein, adjacent battle array be representing matrix summit between neighbouring relations
Matrix, by classifying the load bus of active power distribution network, obtains grid-connected load bus collection, isolated island load joint
Point set and the classification results of interruptible load set of node.
Alternatively, source-lotus minimal path sets can be obtained by the topological adjacency battle array of network line.For adjacency matrix C, if
R >=n, must have Cr=0, wherein, the line number of r adjacency matrix C, the columns of n adjacency matrix C.Therefore, adjacent
Matrix obtains the internodal minimal path sets of arbitrary load:
If it is assumed that in n the node of the network S of active power distribution network, n1～nRNode is distributed power source and grid-connected
Points of common connection, nN+1～nNEach node is distribution network node, rear nN+1～nLNode is load bus, then divide
Minimal path sets between cloth power supply and grid-connected points of common connection and load is C1, C2..., Cn-1Middle n1～nRJoint
Point and nN+1～nLInternodal element.At above-mentioned C1, C2..., Cn-1Multiplying in: as i ≠ j,As i=j,AndIn polynomial expression, if the arc in a certain item goes out
Show more than once, then this has been taken as 0, ifIn a certain item already contained inA certain item in,
Then this is taken as 0.
As the optional embodiment of one, determine the topological structure of classification results, obtain determining that result includes: when dividing
When class result is network load set of node, determine active power distribution network and mesh portions topological structure；When classification results is
During isolated island load bus collection, according to adjacency matrix and source-lotus minimal path sets, according to connected domain, load bus is performed polymerization,
Obtain the isolated island load bus subset of isolated island load bus collection, and determine the distributed electrical that isolated island load bus subset includes
Source, load and energy storage device.
For grid-connected load bus collection, determine grid-connected partial-topology and configuration；For isolated island load bus collection, according to neighbour
Connect battle array and source-lotus minimal path sets, be polymerized by connected domain node each to network, thus filter out isolated island Node subsets,
And determine comprised distributed power source, load and energy storage device；
As the optional embodiment of one, determine the topological structure of classification results, obtain determining that result includes: according to
Load is saved by breadth-first search, adjacency matrix, isolated island load bus collection and source-lotus minimal path sets according to connected domain
Point performs polymerization, obtains the isolated island load bus subset of isolated island load bus collection, and determines and the existence of public power distribution network
The grid-connected set of communication paths.
Operation topological structure identification can use breadth-first search, and (Breadth First Search is referred to as
BFS), again for breadth-first algorithm, or laterally priority algorithm, it is a kind of graphic searching calculation algorithm, from root node
Set out, along the node of the width traversal tree of tree, if it find that target, then calculate termination.This embodiment is according to adjacent
Matrix, isolated island load bus collection and source-lotus minimal path sets, be polymerized each node in network according to connected domain,
Thus filter out isolated island Node subsets, and may determine that the grid-connected joint of the communication paths existed with public power distribution network simultaneously
Point set.
As the optional embodiment of one, according to classification results with determine that result sets up the preset model of active power distribution network
Including: according to classification results and determine result select active power distribution network operating condition in running；Obtain and run
Operating mode probability distribution information in active power distribution network；Obtain distributed power source and load is connecing via power electronic equipment
Fashionable access information；Set up the preset model including probability distribution information and access information.
According to load bus classification and operation topology Identification result, choose the operating condition of main active power distribution network, obtain
Operating condition probability distribution information in active power distribution network, obtains distributed power source and load and is filling via power electronics
Put access information during access, set up and comprise distributed power source and load access information, operating condition probability distribution information
Network-component space submodel.
Network sample each in network-component space submodel is carried out packet by topology proximity and is used for parallel processing.To dividing
Each similar network sample in group, chooses one of them network sample as network base, carries out three phase fronts and pushes back for probability tide
Stream calculation and probability harmonic flow calculation, it is thus achieved that node each phase voltage distribution character.To network sample variation in group,
Use penalty method, carry out three phase fronts respectively and push back for Probabilistic Load Flow and the acceleration of probability harmonic trend, thus obtain other nets
Network sample correspondence operating mode lower node each phase voltage distribution character.The node voltage of each operating condition is distributed according to running work
Condition probability distribution information is added up, thus obtains the active power distribution network assessment result at planning stage quality of voltage.
As the optional embodiment of one, according to classification results with determine that result sets up the default mould of active power distribution network
After type, the quality of voltage appraisal procedure of this active power distribution network also includes: the parameter of acquisition load and the input of load are defeated
Go out information；Input/output information according to distributed power source, the parameter of load and load determines for representing distributed electrical
The probability Distribution Model of the probability that source and load are distributed in active power distribution network.
Obtain the basic parameter of load and the input/output information of load, according to active power distribution network in the distribution of planning stage
Formula power supply, load basic parameter and input-output characteristic estimate the probability Distribution Model of distributed power source and load.
This embodiment is for existing active power distribution network problem of quality of voltage assessment difficulty in the planning stage, it is proposed that one
Planting active power distribution network planning stage electricity quality evaluation method, the method uses Monte Carlo multimode simulation, based on generally
Rate trend and harmonic wave Probabilistic Load Flow, integrating parallel calculates and Load flow calculation speed technology, improves and exist active power distribution network
The assessment accuracy rate of the quality of voltage of planning stage, and assessment efficiency, while greatly reducing the calculating time, real
Show the quality of voltage assessment under operating condition many to active power distribution network.
Below in conjunction with preferred embodiment, technical scheme is illustrated.
Fig. 2 is the flow chart of the quality of voltage appraisal procedure of active power distribution network according to a second embodiment of the present invention.Such as figure
Shown in 2, the quality of voltage appraisal procedure of this active power distribution network comprises the following steps:
Step S201, active power distribution network multimode is simulated.
Active power distribution network is used Monte Carlo-state for time sampling method, based on to the element state of active power distribution network with hold
The probability distribution of continuous time is sampled, and comprehensively draws the status switch of each element of active power distribution network, thus draws total
Running status-the duration time sequence of the system of active power distribution network in time period.
Active power distribution network circuit according to the planning stage and equipment configuration, it is assumed that the element initial time of active power distribution network is equal
Being in running status, the persistent period that each element in the system of active power distribution network rests on current state takes out
Sample, persistent period status switch can be simulated by the probability distribution backstepping of element fault and repair time and be obtained.
Step S202, classifies to the operating mode of load bus.
According to running status-duration time sequence, select the running status of the system of active power distribution network, by active distribution
The network of net adjoins battle array and obtains source-lotus minimal path sets, and classifies load bus, obtain grid-connected load bus collection,
Isolated island load bus collection and the classification results of interruptible load set of node.
According to the status switch of each element, comprehensively provide in total period the running status of the system of active power distribution network and hold
Continuous time series selects system running state, utilizes network line topological adjacency battle array to obtain source-lotus minimal path sets, to load
Node is classified, and obtains grid-connected load bus collection, isolated island load bus collection and the classification results of interruptible load set of node.
Step S203, runs topological structure identification.
The operating mode of load bus is being classified, is obtaining grid-connected load bus collection, isolated island load bus collection and interrupt negative
After the classification results of lotus set of node, run topological structure identification.For grid-connected load bus collection, determine and mesh portions
Topology and configuration；For isolated island load bus collection, according to the source in adjacent battle array and step S202-lotus minimal path sets,
It is polymerized according to connected domain node each to network, thus filters out isolated island Node subsets, determine comprised distributed
Power supply, load and energy storage device.
Step S204, builds network-component space submodel.
According to step S202 and the classification of step S203 load bus and operation topology Identification result, choose active power distribution network
Main operating condition, set up and comprise distributed power source and load access information, the net of operating condition probability distribution information
Network-component space submodel.
Step S205, is simulated with distributed power source load.
According to active power distribution network at distributed power source, load basic parameter and the input-output characteristic of load of planning stage,
Estimate the probability Distribution Model of distributed power source and load.
Step S206, processes with acceleration multi-state grouping parallel.
Network sample each in network-component space submodel is carried out packet by topology proximity and is used for parallel processing.To dividing
Each similar network sample in group, chooses one of them network sample network base as active power distribution network, carries out three phase fronts
Push back for probabilistic load flow and probability harmonic flow calculation, it is thus achieved that node each phase voltage distribution character.For group Intranet
Network sample variation, uses penalty method, carries out three phase fronts respectively and pushes back for Probabilistic Load Flow and the acceleration of probability harmonic trend,
Thus obtain other network sample correspondence operating mode lower node each phase voltage distribution character.
Step S207, the node voltage distribution to each operating condition is added up by operating condition probability distribution information, obtains
Obtain active power distribution network planning stage quality of voltage assessment result.
After processing multi-state grouping parallel with acceleration, operating condition is pressed in the node voltage distribution to each operating condition
Probability distribution information is added up, thus obtains active power distribution network planning stage quality of voltage assessment result.
This embodiment is simulated by active power distribution network multimode, classifies the operating mode of load bus, runs topology knot
Structure identification, builds network-component space submodel, is simulated load with distributed power source, is grouped multi-state also
Row processes with acceleration, and the node voltage distribution to each operating condition is added up by operating condition probability distribution information, obtains
Obtaining active power distribution network planning stage quality of voltage assessment result, reached in active power distribution network planning process, it is right to reduce
Quality of voltage in active power distribution network carries out the effect of the difficulty of accurate evaluation.
It should be noted that can be at such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing
Computer system performs, and, although show logical order in flow charts, but in some cases, can
With to be different from the step shown or described by order execution herein.
The embodiment of the present invention additionally provides the quality of voltage apparatus for evaluating of a kind of active power distribution network.It should be noted that should
The quality of voltage apparatus for evaluating of the active power distribution network of embodiment may be used for the active power distribution network of the execution embodiment of the present invention
Quality of voltage appraisal procedure.
Fig. 3 is the quality of voltage apparatus for evaluating of active power distribution network according to embodiments of the present invention.As it is shown on figure 3, this has
The quality of voltage apparatus for evaluating of source power distribution network includes: analogue unit 10, taxon 20, sets up unit 40, processes
Unit 50 and statistic unit 60.
Analogue unit 10, for being in currently the current state of element and the element of active power distribution network of active power distribution network
The persistent period of state performs statistical simulation, obtains analog result.
Taxon 20, for classifying the load bus of active power distribution network according to analog result, obtains classification knot
Really；
Determine unit 30, for determining the topological structure of classification results, obtain determining result；
Set up unit 40, be used for according to classification results and determine that result sets up the preset model of active power distribution network；
Processing unit 50, for preset model is performed process, obtains the voltage's distribiuting information of load bus；
Statistic unit 60, for voltage's distribiuting information is performed statistics, obtains the quality of voltage assessment knot of active power distribution network
Really.
Alternatively, analogue unit 10 includes that decimation blocks and first determines module.Wherein, decimation blocks is for active
The current state of the element of power distribution network and be in persistent period of current state probability distribution in active power distribution network and perform
Sampling, obtains the status switch of the element of active power distribution network；First determines module, for determining have according to status switch
The running status sequence of the system of source power distribution network and the duration time sequence of the system of active power distribution network.
Alternatively, taxon 20 includes selecting module, and second determines module, acquisition module and sort module.Wherein,
Select module, when system lasting of the running status sequence according to the system of active power distribution network and active power distribution network
Between the running status of system of sequence selection active power distribution network；Second determines module, for determining have under operation
The adjacency matrix of the network line topology of source power distribution network；Acquisition module, for obtaining source-lotus minimal path according to adjacency matrix
Collection, wherein, source-lotus minimal path sets is the internodal minimal path sets of arbitrary load；And sort module, for according to source
Load bus is classified by-lotus minimal path sets, obtains network load set of node, isolated island load bus collection, interruptible load
Set of node.
Optionally it is determined that unit 30 includes that the 3rd determines module and the first aggregation module.Wherein, the 3rd determines that module is used
In when classification results is network load set of node, determine active power distribution network and mesh portions topological structure；First gathers
Compound module, for when classification results is isolated island load bus collection, according to adjacency matrix and source-lotus minimal path sets, according to
Connected domain performs polymerization to load bus, obtains the isolated island load bus subset of isolated island load bus collection, and determines isolated island
Distributed power source, load and the energy storage device that load bus subset includes.
Optionally it is determined that unit 30 includes the second aggregation module, for according to breadth-first search, adjacency matrix,
Isolated island load bus collection and source-lotus minimal path sets perform polymerization according to connected domain to load bus, obtain isolated island load bus
The isolated island load bus subset of collection, and determine that there is the grid-connected of communication paths with public power distribution network gathers.
Alternatively, set up unit 40 for according to classification results and determine result select active power distribution network in running
Operating condition；Obtain operating condition probability distribution information in active power distribution network；Obtain distributed power source and load
Access information when accessing via power electronic equipment；Set up the default mould including probability distribution information and access information
Type.
Alternatively, the quality of voltage apparatus for evaluating of this active power distribution network also includes: acquiring unit, for according to classification
Result and after determining the preset model that result sets up active power distribution network, obtains parameter and the input and output of load of load
Information；Wherein it is determined that unit 30 is additionally operable to according to distributed power source, the parameter of load and the input/output information of load
Determine the probability Distribution Model for representing probability that distributed power source and load be distributed in active power distribution network.
This embodiment passes through the analogue unit 10 current state to the element of active power distribution network and the element of active power distribution network
The persistent period being in current state performs statistical simulation, obtains analog result；By taxon 20 according to simulation knot
The load bus of active power distribution network is classified by fruit, obtains classification results；It is determined by unit 30 and determines classification results
Topological structure, obtain determining result；According to classification results and determine that result sets up active distribution by setting up unit 40
The preset model of net；By processing unit 50, preset model is performed process, obtain the voltage's distribiuting information of load bus；
By statistic unit 60, voltage's distribiuting information is performed statistics, obtain the quality of voltage assessment result of active power distribution network.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Calculating device realize, they can concentrate on single calculating device, or is distributed in multiple calculating device institute
On the network of composition, alternatively, they can realize with calculating the executable program code of device, it is thus possible to
It is stored in storing in device and is performed by calculating device, or they are fabricated to respectively each integrated circuit die
Block, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, the present invention
It is not restricted to any specific hardware and software combine.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the quality of voltage appraisal procedure of an active power distribution network, it is characterised in that including:
The current state of element and the element of described active power distribution network to active power distribution network are in described current state
Persistent period perform statistical simulation, obtain analog result；
According to described analog result, the load bus of described active power distribution network is classified, obtain classification results；
Determine the topological structure of described classification results, obtain determining result；
According to described classification results and the described preset model determining that result sets up described active power distribution network；
Described preset model is performed process, obtains the voltage's distribiuting information of described load bus；And
Described voltage's distribiuting information is performed statistics, obtains the quality of voltage assessment result of described active power distribution network.
Method the most according to claim 1, it is characterised in that the current state to the element of described active power distribution network
The persistent period being in described current state with the element of described active power distribution network performs statistical simulation, obtains described
Analog result includes:
To the current state of the element of described active power distribution network be in the persistent period of described current state described
Probability distribution in active power distribution network performs sampling, obtains the status switch of the element of described active power distribution network；With
And
Determine the running status sequence of the system of described active power distribution network according to described status switch and described active join
The duration time sequence of the system of electrical network.
Method the most according to claim 2, it is characterised in that according to described analog result to described active power distribution network
Load bus classify, obtain described classification results and include:
Continuing of the running status sequence of the system according to described active power distribution network and the system of described active power distribution network
Time series selects the running status of the system of described active power distribution network；
The adjacency matrix of the network line topology of described active power distribution network is determined under described running status；
Obtaining source-lotus minimal path sets according to described adjacency matrix, wherein, described source-lotus minimal path sets is the most described
Minimal path sets between load bus；And
According to described source-lotus minimal path sets, described load bus is classified, obtain network load set of node, orphan
Island load bus collection, interruptible load set of node.
Method the most according to claim 3, it is characterised in that determine the topological structure of described classification results, obtain
Described determine that result includes:
When described classification results is described network load set of node, determine the also mesh portions of described active power distribution network
Topological structure；And
When described classification results is described isolated island load bus collection, according to described adjacency matrix and described source-lotus
Path collection, performs polymerization according to connected domain to described load bus, obtains the isolated island of described isolated island load bus collection
Load bus subset, and determine distributed power source, load and the energy storage dress that described isolated island load bus subset includes
Put.
Method the most according to claim 3, it is characterised in that determine the topological structure of described classification results, obtain
Described determine that result includes: according to breadth-first search, described adjacency matrix, described isolated island load bus
Collection and described source-lotus minimal path sets perform polymerization according to connected domain to described load bus, obtain described isolated island load
The isolated island load bus subset of set of node, and determine that there is the grid-connected of communication paths with public power distribution network gathers.
Method the most according to claim 4, it is characterised in that according to described classification results with described determine that result is built
The preset model of vertical described active power distribution network includes:
According to described classification results and described determine result select the operation in running of the described active power distribution network
Operating mode；
Obtain described operating condition probability distribution information in described active power distribution network；
Obtain described distributed power source and the described load access information when accessing via power electronic equipment；With
And
Set up and include described probability distribution information and the preset model of described access information.
Method the most according to claim 6, it is characterised in that according to described classification results with described determine result
After setting up the preset model of described active power distribution network, described method also includes:
Obtain parameter and the input/output information of described load of described load；And
Input/output information according to described distributed power source, the parameter of described load and described load determine for
Represent the probability distribution mould of the probability that described distributed power source and described load be distributed in described active power distribution network
Type.
8. the quality of voltage apparatus for evaluating of an active power distribution network, it is characterised in that including:
Analogue unit, is used at the current state of element to active power distribution network and the element of described active power distribution network
Perform statistical simulation in the persistent period of described current state, obtain analog result；
Taxon, for the load bus of described active power distribution network being classified according to described analog result,
Obtain classification results；
Determine unit, for determining the topological structure of described classification results, obtain determining result；
Set up unit, for according to described classification results with described determine that result sets up the pre-of described active power distribution network
If model；
Processing unit, for described preset model is performed process, obtains the voltage's distribiuting letter of described load bus
Breath；And
Statistic unit, for described voltage's distribiuting information is performed statistics, obtains the voltage of described active power distribution network
Quality assessment result.
Device the most according to claim 8, it is characterised in that described analogue unit includes:
Decimation blocks, is used for the current state of the element to described active power distribution network and is in described current state
Persistent period probability distribution in described active power distribution network performs sampling, obtains the element of described active power distribution network
Status switch；And
First determines module, for determining the operation shape of the system of described active power distribution network according to described status switch
The duration time sequence of the system of state sequence and described active power distribution network.
Device the most according to claim 9, it is characterised in that described taxon includes:
Select module, for running status sequence and the described active distribution of the system according to described active power distribution network
The duration time sequence of the system of net selects the running status of the system of described active power distribution network；
Second determines module, for determining the network line topology of described active power distribution network under described running status
Adjacency matrix；
Acquisition module, for obtaining source-lotus minimal path sets according to described adjacency matrix, wherein, described source-lotus is minimum
Minimal path sets between any described load bus of Lu Jiwei；And
Sort module, for classifying described load bus according to described source-lotus minimal path sets, obtains network
Load bus collection, isolated island load bus collection, interruptible load set of node.
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