CN109146234A - A kind of the safety evaluating method and system of charging network access power distribution network - Google Patents
A kind of the safety evaluating method and system of charging network access power distribution network Download PDFInfo
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- CN109146234A CN109146234A CN201810723372.5A CN201810723372A CN109146234A CN 109146234 A CN109146234 A CN 109146234A CN 201810723372 A CN201810723372 A CN 201810723372A CN 109146234 A CN109146234 A CN 109146234A
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- G—PHYSICS
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- 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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- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
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- G—PHYSICS
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- 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
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- 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
A kind of the safety evaluating method and system of charging network access power distribution network, comprising: evaluation metrics value is calculated based on evaluation and test parameter and preset evaluation metrics；Evaluation and test model based on the evaluation metrics value and pre-selection building calculates the safety parameters of charging network access power distribution network；Safety parameters based on charging network access power distribution network evaluate and test the safety of charging network access power distribution network.The present invention carries out scoring questionnaire survey to power distribution network safety in operation evaluation metrics system to the charging network access of different regions using analytic hierarchy process (AHP) and calculates weight coefficient, can more preferable adaptation to local conditions evaluate and test, a variety of part throttle characteristics of present invention consideration charging network, formulate the safety evaluation metrics system of charging network access power distribution network, refine evaluation and test model more, evaluation result is more accurate.
Description
Technical field
The present invention relates to the security fields of power distribution network, and in particular to a kind of safety evaluation and test of charging network access power distribution network
Method and system.
Background technique
As attention degree of the whole world to clean energy resource persistently increases, cleaning for the energy also no longer singly refers to energy input side
Clean, while also including the cleaning of energy outlet side, can source terminal equipment clean.Electric car is as extensive use
The vehicles in production and living, with its distinctive zero emission, zero pollution, can flexibly control the features such as to become clean energy resource whole
The typical equipments of end equipment.
Safe operation but with gradually increasing for the electrically-charging equipment of electric car and its auxiliary construction, for power distribution network
Influence is also gradually increased.First.As electric load, large-scale new load access will necessarily be to distribution network voltage, electric current, frequency
The indexs such as rate have an impact；Secondly, containing a large amount of electronic power rectifier parts in electrically-charging equipment, as nonlinear-load, largely
Electrically-charging equipment access power distribution network will certainly cause the increase of harmonic component and tri-phase unbalance factor, in addition to this, each department are filled
Electric network situation is different and distribution network construction basis is different, so the evaluation and test model excessively to objectify cannot be used uniformly, therefore
Influence of the different regions charging network to power distribution network how is evaluated and tested to need to solve within corresponding control range.
Summary of the invention
In order to solve the above-mentioned deficiency in the presence of the prior art, the present invention provides a kind of charging network access power distribution network
Safety evaluating method and system.
Present invention provide the technical scheme that a kind of safety evaluating method of charging network access power distribution network, comprising:
Evaluation metrics value is calculated based on evaluation and test parameter and preset evaluation metrics；
Evaluation and test model based on the evaluation metrics value and pre-selection building calculates the safety of charging network access power distribution network
Index；
Based on the charging network access power distribution network safety parameters to charging network access power distribution network safety into
Row evaluation and test.
Preferably, the building of the evaluation and test model, comprising:
Criterion to influence charging network access security of distribution network is made as rule layer with influencing the evaluation metrics of criterion
For solution layer；
The weight coefficient of the rule layer and solution layer is calculated separately based on assessment data；
Regional evaluation metrics value is calculated based on area evaluation and test parameter and preset regional evaluation metrics；
The safety for calculating charging network access power distribution network based on the weight coefficient and regional evaluation metrics value building refers to
Several formula.
Preferably, described to calculate charging network based on the weight coefficient and regional evaluation metrics value building and access power distribution network
Safety parameters formula, be shown below:
SEV-m=u1(v11δU+v12δf+v13δP)+u2(v21THDU+v22εU)+u3(v31αEV+v32βEV)
In formula: SEV-m: the safety parameters of charging network access power distribution network；ui: rule layer weight coefficient；vij: solution layer
Weight coefficient, wherein i and j is coefficient, value 1,2,3；δ U: voltage deviation rate；δ f: frequency departure rate；δ P: load is abundant
Dose rate；THDU: percent harmonic distortion；εU: tri-phase unbalance factor；αEV: charging simultaneity factor；βEV: electrically-charging equipment construction rate.
Preferably, the regional evaluation metrics include: charging simultaneity factor and electrically-charging equipment construction rate；
The area evaluation and test parameter, comprising: distribution network load peak value, charging network load peak, electrically-charging equipment planning are built
If amount and electrically-charging equipment ownership.
Preferably, described that evaluation metrics value, packet are calculated based on area evaluation and test parameter and preset regional evaluation metrics
It includes:
Charging simultaneity factor is calculated based on the distribution network load peak value and charging network load peak；
Electrically-charging equipment construction rate is calculated based on the electrically-charging equipment planning construction amount and electrically-charging equipment ownership.
Preferably, described that charging simultaneity factor, such as following formula are calculated based on distribution network load peak value and charging network load peak
It is shown:
In formula；Charging network load peak；Distribution network load peak value.
It is preferably, described that electrically-charging equipment construction rate is calculated based on electrically-charging equipment planning construction amount and electrically-charging equipment ownership,
It is shown below:
In formula:Electrically-charging equipment planning construction amount；Electrically-charging equipment ownership.
Preferably, the criterion to influence charging network access security of distribution network is as rule layer, comprising:
It regard linear character evaluation and test, nonlinear characteristic evaluation and test and regionalism evaluation and test as rule layer.
Preferably, the evaluation metrics include: voltage deviation rate, frequency departure rate, load margin rate, percent harmonic distortion and
Tri-phase unbalance factor；
The evaluation and test parameter, comprising: whole day distribution after voltage value, frequency, power distribution network maximal workload, charging network access
Peak value, voltage positive-sequence component virtual value, the voltage negative sequence component virtual value, the virtual value of harmonic amplitude, fundamental voltage amplitude of net load
Virtual value and harmonic wave highest number.
It is preferably, described that evaluation metrics value is calculated based on evaluation and test parameter and preset evaluation metrics, comprising:
Voltage deviation rate is calculated based on the voltage value and nominal voltage；
Frequency departure rate is calculated based on the frequency and nominal frequency；
Peak computational load based on whole day distribution network load after the power distribution network maximal workload and charging network access
Allowance rate；
The percent harmonic distortion is calculated based on the voltage positive-sequence component virtual value and voltage negative sequence component virtual value；
Based on the data that the virtual value of the harmonic amplitude, the virtual value of fundamental voltage amplitude and harmonic wave highest number are acquisition
Calculate tri-phase unbalance factor.
Based on the same inventive concept, the present invention also provides a kind of safeties of charging network access power distribution network to evaluate and test system
System, comprising:
First computing module, for calculating evaluation metrics value based on evaluation and test parameter and preset evaluation metrics；
Second computing module calculates charging network for the evaluation and test model based on the evaluation metrics value and pre-selection building and connects
Enter the safety parameters of power distribution network；
Evaluation and test module accesses distribution to charging network for the safety parameters based on charging network access power distribution network
The safety of net is evaluated and tested.
Preferably, the safety evaluating system, further includes: building module is evaluated and tested for being constructed according to analytic hierarchy process (AHP)
Model；
The building module, comprising:
Hierarchy unit, for using influence charging network access security of distribution network criterion as rule layer, to influence standard
Evaluation metrics then are as solution layer
Computing unit is also used to for being calculated separately the weight coefficient of the rule layer and solution layer based on assessment data
Regional evaluation metrics value is calculated based on area evaluation and test parameter and preset regional evaluation metrics；
Construction unit, for calculating charging network based on the weight coefficient and regional evaluation metrics value building and accessing distribution
The formula of the safety parameters of net.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
Technical solution provided by the invention calculates evaluation metrics value based on evaluation and test parameter and preset evaluation metrics；
Evaluation and test model based on the evaluation metrics value and pre-selection building calculates the safety parameters of charging network access power distribution network；It is based on
The safety parameters of the charging network access power distribution network evaluate and test the safety of charging network access power distribution network, for not
Same area constructs different evaluation and test models, passes through evaluation and test model and carries out the safety evaluation and test that charging network accesses power distribution network, solves
The problem of influence of the evaluation and test different regions charging network to power distribution network determined within corresponding control range, it is quasi- to improve evaluation and test
Exactness.
Technical solution provided by the invention obtains the charging network access of different regions to power distribution network using analytic hierarchy process (AHP)
Evaluation and test data analyzed, and calculate the weight coefficient of each evaluation metrics, can more preferable adaptation to local conditions evaluate and test.
Technical solution provided by the invention, evaluation and test parameter consider a variety of part throttle characteristics of charging network, formulate charging net
Network accesses the safety evaluation metrics system of power distribution network, refines evaluation and test model more, improves the accuracy of evaluation result.
Technical solution provided by the invention can get suitable this area due to obtaining evaluation and test data for area to be evaluated
Applicable safety in operation evaluates and tests model.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the safety evaluating method of charging network access power distribution network in the present invention；
Fig. 2 is the detail flowchart of safety evaluating method in the embodiment of the present invention；
Fig. 3 is evaluation metrics system figure of the invention.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are done further with example with reference to the accompanying drawings of the specification
Explanation.
Fig. 1 is a kind of flow chart for the safety evaluating method that charging network accesses power distribution network, as shown in Figure 1, comprising:
Step S1, evaluation metrics value is calculated based on evaluation and test parameter and preset evaluation metrics；
Step S2, the evaluation and test model based on the evaluation metrics value and pre-selection building calculates charging network access power distribution network
Safety parameters；
Step S3, the safety parameters based on charging network access power distribution network access the peace of power distribution network to charging network
Full property is evaluated and tested.
Fig. 2 is the detail flowchart of the safety evaluating method provided in the embodiment of the present invention, as shown in Figure 2, comprising:
Step 1: design specialist's questionnaire, the expert group for being issued to diversification in system carry out questionnaire survey acquisition and comment
Measured data services public including the scientific research institutions such as school, research institute, regional dispatching personnel, the operation maintenance personnel of a line and electric car
The personnel of department, or the forum of above-noted persons is held, to guarantee the comprehensive of questionnaire survey；
Step 2: utilizing analytic hierarchy process (AHP), expert's questionnaire result is analyzed, determines weight coefficient, specific method is such as
Under:
1) participate in filling in the electric car of analytic hierarchy process (AHP) (Analytic Hierarchy Process, AHP) application form
User forms judgment matrix according to the scale of relative importance and judgment matrix element between each evaluation index, wherein
The scale of judgment matrix element is as shown in table 1.
The Scale Method of 1 judgment matrix element of table
2) judgment matrix is formed according to the statistical result of questionnaire, and finds out the Maximum characteristic root λ of judgment matrixmax。
3) it calculatesWherein n is the order of judgment matrix, is tabled look-up and is obtained according to the value of the CI of each judgment matrix
RI is obtained, and is calculatedIf CR < 0.1, which meets uniformity test；If CR > 0.1, the judgement
Matrix is unsatisfactory for uniformity test, needs to re-form judgment matrix according to questionnaire result.
The process for carrying out Weight of Coefficient through Analytic Hierarchy Process to the evaluation metrics of rule layer below is illustrated:
(1) questionnaire is carried out to local expert or expert's forum gives a mark to three evaluation and test targets of rule layer,
It is as follows to obtain rule layer judgment matrix A:
(2) data processing being carried out to judgment matrix A, progress column vector normalization first obtains weight column vector u,
(3) it according to weight column vector u, seeks Maximum characteristic root and carries out consistency test,
(4) table look-up 2 RI=0.52,
2 random index of table
| n | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| RI | 0 | 0 | 0.52 | 0.90 | 1.12 | 1.24 | 1.32 | 1.41 | 1.45 |
(5) meeting uniformity test, then the corresponding weight coefficient of judgment matrix is available, as follows:
u1=0.633, u2=0.26, u3=0.107
According to evaluation and test data, in the same way obtain the first judgment matrix of solution layer, the second judgment matrix of solution layer and
Solution layer third judgment matrix corresponds to available weight coefficient；
First judgment matrix is according to voltage deviation rate, frequency departure rate and the load margin rate for influencing linear character evaluation and test
It generates；
Second judgment matrix is generated according to the percent harmonic distortion and tri-phase unbalance factor that influence nonlinear characteristic evaluation and test；
Third layer judgment matrix is generated according to the charging simultaneity factor and electrically-charging equipment construction rate that influence regionalism evaluation and test
's.
Step 3: calculating charging network access using the determining weight coefficient of analytic hierarchy process (AHP) and based on evaluation metrics value
The safety parameters of power distribution network, as follows:
SEV-m=u1(v11δU+v12δf+v13δP)+u2(v21THDU+v22εU)+u3(v31αEV+v32βEV)
In formula: SEV-m: the safety parameters of charging network access power distribution network；ui: rule layer weight coefficient；vij: solution layer
Weight coefficient, wherein i and j is coefficient, value 1,2,3；δ U: voltage deviation rate；δ f: frequency departure rate；δ P: load is abundant
Dose rate；THDU: percent harmonic distortion；εU: tri-phase unbalance factor；αEV: charging simultaneity factor；βEV: electrically-charging equipment construction rate.
Evaluation metrics system figure as shown in Figure 3 obtains each evaluation and test parameter by preset evaluation metrics and calculates evaluation and test
Index value, specific explanations and its measuring method are as follows:
(1) voltage deviation
Voltage deviation confession under directions electric system is under normal operating mode, the virtual voltage of certain point and the difference of nominal voltage of a system
It is known as the voltage deviation (voltage deviation) of the point with the percentage of the ratio between nominal voltage of a system.Its mathematic(al) representation
For
Wherein, δ U is voltage deviation；UreFor actual voltage value；UNFor the nominal voltage of system.
(2) frequency departure
Frequency (frequency) is one of important indicator of power quality.Guarantee the normal operation in user and power plant
It just must be strictly controlled system frequency, make the frequency bias control of system within allowed band.The size of frequency departure permits
Perhaps range not only embodies the height of Operation of Electric Systems management level, while reflecting the degree of a National Industrial prosperity.
Under normal operating conditions, (50Hz or 60Hz, China are marked using 50Hz for the actual value and nominal value of system frequency for electric system
It is quasi-) difference be known as the frequency departure of system.It is formulated are as follows:
Wherein, δ f is frequency departure；freFor actual motion frequency；fNFor the nominal frequency of system.
(3) distribution network load nargin
The index is the evaluation metrics that the present invention newly defines, and is referred to after charging network accesses power distribution network, complete when reaching
The difference ratio for the maximum load that can be undertaken when its load peak with power distribution network, is formulated are as follows:
Wherein, δ P is load margin；PmaxFor power distribution network maximal workload；PEV-maxFor whole day distribution after charging network access
The peak value of net load.
(4) tri-phase unbalance factor
The three-phase imbalance (or symmetrical) of electric system is due to threephase load uneven (or symmetrical) and system element
Caused by the asymmetry of parameter.When studying asymmetric three-phase electrical power system, symmetrical component method is widely used, i.e., it will be any group of
Asymmetric three-phase phasor (voltage or electric current) resolves into the three-phase phasor of the different three-phase symmetrical of phase sequence.Electric system exists
Under normal operating mode, the three-phase that the ratio between negative sequence component virtual value and positive-sequence component virtual value of electricity are defined as the electricity is uneven
Weighing apparatus degree, is formulated are as follows:
Wherein, εUFor voltage tri-phase unbalance factor；U1For voltage positive-sequence component virtual value；U2It is effective for voltage negative sequence component
Value.
(5) percent harmonic distortion
The internationally recognized definition of harmonic wave (harmonic) is: " harmonic wave is the component sine waves of a cycle electrical quantity, frequency
Rate is the integral multiple of fundamental frequency ".One important indicator of harmonic wave is exactly total harmonic distortion factor (THD), is defined as harmonic wave and causes
Distorted waveform deviate sinusoidal waveform degree, be the harmonic content in periodical of ac virtual value and its fundametal compoment
The ratio between virtual value (is indicated) with percentage, is formulated are as follows:
Wherein, THDUFor voltage total harmonic distortion factor；UkFor the virtual value of each harmonic amplitude；U1For having for fundamental voltage amplitude
Valid value；M is the harmonic wave highest number that is considered.
(6) charge simultaneity factor
Charging simultaneity factor is New Set proposed by the present invention, indicates the load peak and distribution network load peak value of charging network
Ratio, embody impact degree of the access for security of distribution network of charging network.It is formulated as follows:
Wherein, αEVFor the simultaneity factor that charges；For distribution network load peak value；For charging network load peak.
(7) electrically-charging equipment planning and development rate
Electrically-charging equipment construction rate refers between this area's electrically-charging equipment planning construction amount and existing electrically-charging equipment scale amount
Relationship is expressed since the construction object of different regions charging network is different, and the influence to power distribution network safety in operation also can be
Difference.It is formulated as follows:
Wherein, βEVFor electrically-charging equipment planning and development rate；For this area's electrically-charging equipment planning construction amount；For the ground
Area's electrically-charging equipment ownership.
During actually calculating, charge simultaneity factor and each area of electrically-charging equipment planning and development rate be it is different,
And areal charging simultaneity factor and electrically-charging equipment planning and development rate be it is constant, i.e., for calculating the areas of regional evaluation metrics
It is constant for evaluating and testing parameter；
Regional evaluation metrics include: charging simultaneity factor and electrically-charging equipment construction rate；
Area evaluation and test parameter include: distribution network load peak value, charging network load peak, electrically-charging equipment planning construction amount and
Electrically-charging equipment ownership.
Based on the same inventive concept, the present embodiment additionally provides a kind of safety evaluation and test system of charging network access power distribution network
System, comprising:
First computing module, for calculating evaluation metrics value based on evaluation and test parameter and preset evaluation metrics；
Second computing module calculates charging network for the evaluation and test model based on the evaluation metrics value and pre-selection building and connects
Enter the safety parameters of power distribution network；
Evaluation and test module accesses distribution to charging network for the safety parameters based on charging network access power distribution network
The safety of net is evaluated and tested.
In embodiment, the safety evaluating system, further includes: building module, for being commented according to analytic hierarchy process (AHP) building
Survey model；
The building module, comprising:
Hierarchy unit, for using influence charging network access security of distribution network criterion as rule layer, to influence standard
Evaluation metrics then are as solution layer
Computing unit is also used to for being calculated separately the weight coefficient of the rule layer and solution layer based on assessment data
Regional evaluation metrics value is calculated based on area evaluation and test parameter and preset regional evaluation metrics；
Construction unit, for calculating charging network based on the weight coefficient and regional evaluation metrics value building and accessing distribution
The formula of the safety parameters of net.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it
It is interior.
Claims (12)
1. a kind of safety evaluating method of charging network access power distribution network characterized by comprising
Evaluation metrics value is calculated based on evaluation and test parameter and preset evaluation metrics；
Evaluation and test model based on the evaluation metrics value and pre-selection building calculates the safety parameters of charging network access power distribution network；
Safety parameters based on charging network access power distribution network comment the safety of charging network access power distribution network
It surveys.
2. safety evaluating method as described in claim 1, which is characterized in that the building of the evaluation and test model, comprising:
To influence the criterion of charging network access security of distribution network as rule layer, to influence the evaluation metrics of criterion as just
Pattern layer；
The weight coefficient of the rule layer and solution layer is calculated separately based on assessment data；
Regional evaluation metrics value is calculated based on area evaluation and test parameter and preset regional evaluation metrics；
The safety parameters of charging network access power distribution network are calculated based on the weight coefficient and regional evaluation metrics value building
Formula.
3. safety evaluating method as claimed in claim 2, which is characterized in that described based on the weight coefficient and area evaluation and test
Index value building calculates the formula of the safety parameters of charging network access power distribution network, is shown below:
SEV-m=u1(v11δU+v12δf+v13δP)+u2(v21THDU+v22εU)+u3(v31αEV+v32βEV)
In formula: SEV-m: the safety parameters of charging network access power distribution network；ui: rule layer weight coefficient；vij: the weight of solution layer
Coefficient, wherein i and j is coefficient, value 1,2,3；δ U: voltage deviation rate；δ f: frequency departure rate；δ P: load margin rate；
THDU: percent harmonic distortion；εU: tri-phase unbalance factor；αEV: charging simultaneity factor；βEV: electrically-charging equipment construction rate.
4. safety evaluating method as claimed in claim 2, which is characterized in that
The area evaluation metrics include: charging simultaneity factor and electrically-charging equipment construction rate；
The area evaluation and test parameter, comprising: distribution network load peak value, charging network load peak, electrically-charging equipment planning construction amount
With electrically-charging equipment ownership.
5. safety evaluating method as claimed in claim 4, which is characterized in that described to evaluate and test parameter based on area and preset
Regional evaluation metrics calculate evaluation metrics value, comprising:
Charging simultaneity factor is calculated based on the distribution network load peak value and charging network load peak；
Electrically-charging equipment construction rate is calculated based on the electrically-charging equipment planning construction amount and electrically-charging equipment ownership.
6. safety evaluating method as claimed in claim 5, which is characterized in that described based on distribution network load peak value and charging net
Network load peak calculates charging simultaneity factor, is shown below:
In formula；Charging network load peak；Distribution network load peak value.
7. safety evaluating method as claimed in claim 5, which is characterized in that described to be based on electrically-charging equipment planning construction amount and fill
Electric facility ownership calculates electrically-charging equipment construction rate, is shown below:
In formula:Electrically-charging equipment planning construction amount；Electrically-charging equipment ownership.
8. safety evaluating method as claimed in claim 2, which is characterized in that described to influence charging network access power distribution network peace
The criterion of full property is as rule layer, comprising:
It regard linear character evaluation and test, nonlinear characteristic evaluation and test and regionalism evaluation and test as rule layer.
9. safety evaluating method as described in claim 1, which is characterized in that
The evaluation metrics include: voltage deviation rate, frequency departure rate, load margin rate, percent harmonic distortion and three-phase imbalance
Degree；
The evaluation and test parameter, comprising: whole day power distribution network is negative after voltage value, frequency, power distribution network maximal workload, charging network access
The peak value of lotus, voltage positive-sequence component virtual value, voltage negative sequence component virtual value, the virtual value of harmonic amplitude, fundamental voltage amplitude have
Valid value and harmonic wave highest number.
10. safety evaluating method as claimed in claim 9, which is characterized in that described based on evaluation and test parameter and preset
Evaluation metrics calculate evaluation metrics value, comprising:
Voltage deviation rate is calculated based on the voltage value and nominal voltage；
Frequency departure rate is calculated based on the frequency and nominal frequency；
Peak computational load allowance based on whole day distribution network load after the power distribution network maximal workload and charging network access
Rate；
The percent harmonic distortion is calculated based on the voltage positive-sequence component virtual value and voltage negative sequence component virtual value；
The virtual value and harmonic wave highest number of virtual value, fundamental voltage amplitude based on the harmonic amplitude are that the data obtained calculate three
Phase degree of unbalancedness.
11. a kind of safety evaluating system of charging network access power distribution network characterized by comprising
First computing module, for calculating evaluation metrics value based on evaluation and test parameter and preset evaluation metrics；
Second computing module calculates charging network access for the evaluation and test model based on the evaluation metrics value and pre-selection building and matches
The safety parameters of power grid；
Evaluation and test module, for the safety parameters based on charging network access power distribution network to charging network access power distribution network
Safety is evaluated and tested.
12. safety evaluating system as claimed in claim 11, which is characterized in that further include: building module, for according to level
Analytic approach building evaluation and test model；
The building module, comprising:
Hierarchy unit, for using influence charging network access security of distribution network criterion as rule layer, to influence criterion
Evaluation metrics are as solution layer
Computing unit is also used to be based on for calculating separately the weight coefficient of the rule layer and solution layer based on assessment data
Area evaluation and test parameter and preset regional evaluation metrics calculate regional evaluation metrics value；
Construction unit, for calculating charging network access power distribution network based on the weight coefficient and regional evaluation metrics value building
The formula of safety parameters.
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Cited By (1)
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