CN110212537A - A kind of electric network swim risk perceptions method - Google Patents
A kind of electric network swim risk perceptions method Download PDFInfo
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- CN110212537A CN110212537A CN201910326033.8A CN201910326033A CN110212537A CN 110212537 A CN110212537 A CN 110212537A CN 201910326033 A CN201910326033 A CN 201910326033A CN 110212537 A CN110212537 A CN 110212537A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a kind of electric network swim risk perceptions method, this method includes obtaining Net Frame of Electric Network figure, constructs Jacobian matrix, calculates electric network current diagram, carries out risk perceptions early warning to power grid.The present invention obtains corresponding Jacobian matrix under electric network swim different situations according to Net Frame of Electric Network figure, singular value decomposition is carried out to the Jacobian matrix under electric network swim again, calculate the voltage of each node and power distribution in physics transmission line of electricity, obtain electric network current diagram, risk perceptions early warning is carried out to power grid according to electric network current diagram, security risk to find in power network line is excluded, and the design scheme for optimizing power grid by Load flow calculation, improves the stability and Resource allocation and smoothing ability of electric system.
Description
Technical field
The invention belongs to electric system simulation and calculate analysis technical field, and in particular to a kind of electric network swim risk perceptions
Method.
Background technique
At runtime, under electrical source voltage incentive action, electric current or power pass through each element of system from power supply for electric system
Offered load is distributed in power network everywhere, referred to as the direction of energy；Electric system is many power stations, substation, distribution
It stands, user etc. is got up the system formed by transmission and disttrbution connection.Electric power (electric energy) is generated in power station, wherein one
Part loses when by transmission and distribution line, substation and power distribution station, and the remaining overwhelming majority is finally consumed by load.This
Sample consumes to by load from the generation of electricity, which transmission and distribution line is flowed through, and each node voltage is how many, and electricity is just in this calculating
Power Load flow calculation or abbreviation Load flow calculation.
In electrical network field, power transmission and transformation equipment operation risk is the synthesis degree that equipment fault possibility and failure cause consequence
Amount, and equipment fault consequence except need to count and equipment direct losses in addition to, it is often more important that need to consider equipment fault to power grid security transport
Harm, that is, need the level analysis equipment operation risk from power grid brought by capable and power supply reliability.
Currently, electrical network field is there are production management construction of system lags, peopleware ability is not high and operation management inertia
The unfavorable factors such as thinking, power grid risk control are difficult.
Summary of the invention
Goal of the invention of the invention is: in order to solve problem above existing in the prior art, the invention proposes one kind
Electric network swim risk perceptions method breaks data among systems barrier to effectively take precautions against electric power safety accident event, summarizes point
Analysis perceives electric network swim risk, improves safe operation of electric network.
The technical scheme is that a kind of electric network swim risk perceptions method, comprising the following steps:
S1, Net Frame of Electric Network figure is obtained；
S2, corresponding Jacobian matrix under electric network swim is calculated according to Net Frame of Electric Network figure；
S3, singular value decomposition is carried out to the Jacobian matrix under electric network swim, calculates each node in physics transmission line of electricity
Voltage and power distribution, obtain electric network current diagram；
S4, risk perceptions early warning is carried out to power grid according to electric network current diagram.
As above-mentioned electric network swim risk perceptions further improvements in methods, the step S2 is calculated according to Net Frame of Electric Network figure
Corresponding Jacobian matrix under electric network swim, specifically include it is following step by step:
S201, the corresponding electrical power wiring figure of Net Frame of Electric Network figure is converted into equivalent circuit diagram；
S202, node admittance matrix is constructed according to equivalent circuit diagram；
S203, corresponding Jacobian matrix under electric network swim is calculated according to node admittance matrix.
As above-mentioned electric network swim risk perceptions further improvements in methods, the step S202 is according to equivalent circuit diagram structure
Node admittance matrix is built, specially
The incidence matrix of electric power networks is obtained according to equivalent circuit diagram, when using I=YV matrix form n node of expression
Node admittance matrix equation group, i.e.,
Wherein
Respectively node Injection Current column vector and column voltage vector, calculate node admittance matrix, i.e.,
Wherein, Y indicates node admittance matrix, diagonal element YiiIndicate the self-admittance of node i, off diagonal element YijTable
Show the transadmittance between node i and node j.
As above-mentioned electric network swim risk perceptions further improvements in methods, in the step S203, phase under electric network swim
The Jacobian matrix answered is specially
Wherein, JF(V1, V2..., Vn) indicate corresponding Jacobian matrix under electric network swim.
As above-mentioned electric network swim risk perceptions further improvements in methods, in the step S3, under electric network swim
Jacobian matrix carry out singular value decomposition, specifically include it is following step by step:
S301, according to the Jacobian matrix J under electric network swim, enable orthogonal matrix A1=JJT, orthogonal matrix A2=JTJ；
S302, orthogonal matrix A is calculated1, A2Characteristic root, be expressed as
Wherein, λ1, λ2Respectively indicate orthogonal matrix A1, A2Characteristic root, E indicate unit matrix；
S303, by orthogonal matrix A1, A2Characteristic root sort from large to small, obtain orthogonal matrix A1, A2Eigenmatrix
∧1, ∧2, it is expressed as
S304, eigenmatrix ∧ is calculated1, ∧2Corresponding eigenvectors matrix, is expressed as
Wherein, U1, U2Respectively indicate eigenmatrix ∧1, ∧2Corresponding eigenvectors matrix；
S305, calculate electric network swim under Jacobian matrix J singular value decomposition, be expressed as
Wherein, ∑ indicates that size is the matrix of m × n.
As above-mentioned electric network swim risk perceptions further improvements in methods, the Jacobian matrix J under electric network swim is calculated
Singular value decomposition when, matrix ∑ is embodied as
Wherein, ∑1Middle element is character pair matrix ∧1, ∧2The secondary root of middle element.
As above-mentioned electric network swim risk perceptions further improvements in methods, in the step S3, physics power transmission line is calculated
When the voltage of each node and power are distributed in road, specifically to transmission line of electricity, power transformer group, reactance group, capacitance group in power grid
Force device and force device between connection type calculated.
As above-mentioned electric network swim risk perceptions further improvements in methods, the step S4 is according to electric network current diagram to electricity
Net carry out risk perceptions early warning, specifically include it is following step by step:
S401, warning information is obtained, positioning and display alarm generation position in electric network current diagram；
S402, the chart spacing that fault element connection is cut out according to power grid topological relation, to the incidence number of the chart spacing
Accordingly and topological relation is coloured；
S403, it is based on power grid topological relation, the chart spacing and the fault element is spliced, and it is detailed to generate failure
Thin hum pattern；
It is S404, the background color of electric network current diagram is dimmed, highlight the fault detail hum pattern.
As above-mentioned electric network swim risk perceptions further improvements in methods, in the step S402, according to power network topology
Relationship cuts out the chart spacing of fault element connection, specially
Centered on the faulty line where fault element, the two sides tie point of faulty line is found on tidal current chart；
The force device that two sides tie point is separately connected is searched in the power grid topological relation of grid topology data record；
The plant stand where the force device of two sides is searched, searches for the force device institute in the plant stand figure of the force device respectively
Chart spacing, cut out respectively in the plant stand figure of both ends force device fault element connection chart spacing.
The beneficial effects of the present invention are: the present invention is according to corresponding refined under Net Frame of Electric Network figure acquisition electric network swim different situations
Gram than matrix, then singular value decomposition is carried out to the Jacobian matrix under electric network swim, calculates each node in physics transmission line of electricity
Voltage and power distribution, obtain electric network current diagram, according to electric network current diagram to power grid carry out risk perceptions early warning, to find
Security risk in power network line is excluded, and optimizes the design scheme of power grid by Load flow calculation, improves electric system
Stability and Resource allocation and smoothing ability.
Detailed description of the invention
Fig. 1 is electric network swim risk perceptions method flow schematic diagram of the invention；
Fig. 2 is the flow diagram that electric network current diagram is calculated in the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, being electric network swim risk perceptions method flow schematic diagram of the invention；A kind of electric network swim risk sense
Perception method, comprising the following steps:
S1, Net Frame of Electric Network figure is obtained；
S2, corresponding Jacobian matrix under electric network swim is calculated according to Net Frame of Electric Network figure；
S3, singular value decomposition is carried out to the Jacobian matrix under electric network swim, calculates each node in physics transmission line of electricity
Voltage and power distribution, obtain electric network current diagram；
S4, risk perceptions early warning is carried out to power grid according to electric network current diagram.
In an alternate embodiment of the present invention where, as shown in Fig. 2, above-mentioned steps S2 calculates power grid according to Net Frame of Electric Network figure
Corresponding Jacobian matrix under trend, specifically include it is following step by step:
S201, the corresponding electrical power wiring figure of Net Frame of Electric Network figure is converted into equivalent circuit diagram；
S202, node admittance matrix is constructed according to equivalent circuit diagram；
S203, corresponding Jacobian matrix under electric network swim is calculated according to node admittance matrix.
In step s 201, it is corresponding to extract Net Frame of Electric Network figure according to the Net Frame of Electric Network figure that step S1 is obtained first by the present invention
Electrical power wiring figure, then obtained electrical power wiring figure is converted into equivalent circuit diagram.
In step S202, the present invention constructs node admittance matrix according to equivalent circuit diagram, and node admittance matrix is according to electricity
Road knowledge finds out the incidence matrix of the network, is solved in the matrix form of nodal voltage equation.
It is above-mentioned that node admittance matrix is constructed according to equivalent circuit diagram, specifically:
The incidence matrix of electric power networks is obtained according to equivalent circuit diagram, when using I=YV matrix form n node of expression
Node admittance matrix equation group, i.e.,
Wherein
By taking 3 nodes as an example, node admittance matrix equation group is indicated are as follows:
Wherein, Y11=(y1+y4+y6),Y22=(y2+y5+y6),Y33=(y3+y4+y6) indicate node 1,2,3 self-admittance,
Y12=Y21=-y6,Y13=Y31=-y4,Y23=Y32=-y5Indicate the transadmittance between respective nodes.
Respectively node Injection Current column vector and column voltage vector, calculate node admittance matrix, i.e.,
Wherein, Y indicates node admittance matrix, diagonal element YiiIndicate the self-admittance of node i, off diagonal element YijTable
Show the transadmittance between node i and node j.
The present invention carries out mathematical abstractions by building node admittance matrix, to electric power networks electrical characteristic, reflects electric power
The parameter and wiring condition of network.
In step S203, the present invention calculates corresponding Jacobian matrix under electric network swim, tool according to node admittance matrix
Body is
Wherein, JF(V1, V2..., Vn) indicate corresponding Jacobian matrix under electric network swim.
In an alternate embodiment of the present invention where, above-mentioned steps S3 first carries out the Jacobian matrix under electric network swim
Singular value decomposition, specifically include it is following step by step:
S301, according to the Jacobian matrix J under electric network swim, enable orthogonal matrix A1=JJT, orthogonal matrix A2=JTJ, A1For
The matrix of one m × m, A2For the matrix of a n × n；
S302, orthogonal matrix A is calculated1, A2Characteristic root, be expressed as
Wherein, λ1, λ2Respectively indicate orthogonal matrix A1, A2Characteristic root, E indicate unit matrix；
S303, by orthogonal matrix A1, A2Characteristic root sort from large to small, obtain orthogonal matrix A1, A2Eigenmatrix
∧1, ∧2, it is expressed as
S304, eigenmatrix ∧ is calculated1, ∧2Corresponding eigenvectors matrix, is expressed as
Wherein, U1, U2Respectively indicate eigenmatrix ∧1, ∧2Corresponding eigenvectors matrix,
S305, calculate electric network swim under Jacobian matrix J singular value decomposition, be expressed as
Wherein, ∑ indicates that size is the matrix of m × n, is embodied as
Wherein, ∑1Middle element is character pair matrix ∧1, ∧2The secondary root of middle element.
When the voltage of each node and power are distributed in calculating physics transmission line of electricity, since dynamic element numerical value is difficult to estimate
Meter, and it is large number of, it is difficult to control in calculating, therefore the present invention has transmission of electricity for the static cell related generally in power grid
Connection type between the big force device of route, power transformer group, reactance group, capacitance group etc. four and force device is such as connected
Either parallel connection etc. carries out electric network swim calculating using above-mentioned two calculating key factor.
The present invention is calculated in physics transmission line of electricity by carrying out intellectual analysis to electric network swim data about each node
Voltage and power distribution, so that the position of optimization design grid nodes and connection type, reach the stabilization of power grid.
In an alternate embodiment of the present invention where, above-mentioned steps S4 carries out risk perceptions to power grid according to electric network current diagram
Early warning, specifically include it is following step by step:
S401, warning information is obtained, positioning and display alarm generation position in electric network current diagram；
S402, the chart spacing that fault element connection is cut out according to power grid topological relation, to the incidence number of the chart spacing
Accordingly and topological relation is coloured；
S403, it is based on power grid topological relation, the chart spacing and the fault element is spliced, and it is detailed to generate failure
Thin hum pattern；
It is S404, the background color of electric network current diagram is dimmed, highlight the fault detail hum pattern.
In S402, the chart spacing of fault element connection is cut out according to power grid topological relation, specially
Centered on the faulty line where fault element, the two sides tie point of faulty line is found on tidal current chart；
The force device that two sides tie point is separately connected is searched in the power grid topological relation of grid topology data record；
The plant stand where the force device of two sides is searched, searches for the force device institute in the plant stand figure of the force device respectively
Chart spacing, cut out respectively in the plant stand figure of both ends force device fault element connection chart spacing.
The present invention is calculated by electric network swim, and the weak ring in transmission line of electricity can be found out in increasingly complicated power grid
Section provides strong data for staff in maintenance process and calculates support, optimizes grid power transmission structure, improve the defeated of power grid
Electrical efficiency and whole electric power resource utilization rate；For large-scale electricity consumption manufacturing enterprise such as steel-making enterprise etc., trend meter is utilized
The adjustment to voltage can be passed through by calculating numerical value, the power plant such as voltage value and power network line needed for can be very good to calculate production
Maintain the stabilization of electric power；Risk present in power grid can be calculated out by Load flow calculation, to find the peace in power network line
Then full hidden danger is excluded, and improve electric system on the whole by the design scheme that Load flow calculation optimizes power grid
Stability and Resource allocation and smoothing ability.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (9)
1. a kind of electric network swim risk perceptions method, which comprises the following steps:
S1, Net Frame of Electric Network figure is obtained；
S2, corresponding Jacobian matrix under electric network swim is calculated according to Net Frame of Electric Network figure；
S3, singular value decomposition is carried out to the Jacobian matrix under electric network swim, calculates the electricity of each node in physics transmission line of electricity
Pressure and power distribution, obtain electric network current diagram；
S4, risk perceptions early warning is carried out to power grid according to electric network current diagram.
2. electric network swim risk perceptions method as described in claim 1, which is characterized in that the step S2 is according to Net Frame of Electric Network
Figure calculate electric network swim under corresponding Jacobian matrix, specifically include it is following step by step:
S201, the corresponding electrical power wiring figure of Net Frame of Electric Network figure is converted into equivalent circuit diagram；
S202, node admittance matrix is constructed according to equivalent circuit diagram；
S203, corresponding Jacobian matrix under electric network swim is calculated according to node admittance matrix.
3. electric network swim risk perceptions method as claimed in claim 2, which is characterized in that the step S202 is according to equivalent electricity
Road figure constructs node admittance matrix, specially
The incidence matrix of electric power networks is obtained according to equivalent circuit diagram, node when n node is indicated using I=YV matrix form
Admittance matrix equation group, i.e.,
Wherein
Respectively node Injection Current column vector and column voltage vector, calculate node admittance matrix, i.e.,
Wherein, Y indicates node admittance matrix, diagonal element YiiIndicate the self-admittance of node i, off diagonal element YijIndicate node
Transadmittance between i and node j.
4. electric network swim risk perceptions method as claimed in claim 2, which is characterized in that in the step S203, power grid tide
Flowing down corresponding Jacobian matrix is specially
Wherein, JF(V1, V2..., Vn) indicate corresponding Jacobian matrix under electric network swim.
5. electric network swim risk perceptions method as described in claim 1, which is characterized in that in the step S3, to power grid tide
The Jacobian matrix that flows down carries out singular value decomposition, specifically include it is following step by step:
S301, according to the Jacobian matrix J under electric network swim, enable orthogonal matrix A1=JJT, orthogonal matrix A2=JTJ；
S302, orthogonal matrix A is calculated1, A2Characteristic root, be expressed as
Wherein, λ1, λ2Respectively indicate orthogonal matrix A1, A2Characteristic root, E indicate unit matrix；
S303, by orthogonal matrix A1, A2Characteristic root sort from large to small, obtain orthogonal matrix A1, A2Eigenmatrix ∧1,
∧2, it is expressed as
S304, eigenmatrix ∧ is calculated1, ∧2Corresponding eigenvectors matrix, is expressed as
Wherein, U1, U2Respectively indicate eigenmatrix ∧1, ∧2Corresponding eigenvectors matrix；
S305, calculate electric network swim under Jacobian matrix J singular value decomposition, be expressed as
Wherein, ∑ indicates that size is the matrix of m × n.
6. electric network swim risk perceptions method as claimed in claim 5, which is characterized in that calculate the Jacobi under electric network swim
When the singular value decomposition of matrix J, matrix ∑ is embodied as
Wherein, ∑1Middle element is character pair matrix ∧1, ∧2The secondary root of middle element.
7. electric network swim risk perceptions method as described in claim 1, which is characterized in that in the step S3, calculate physics
When the voltage of each node and power are distributed in transmission line of electricity, specifically to transmission line of electricity in power grid, power transformer group, reactance group,
Connection type between the force device and force device of capacitance group is calculated.
8. electric network swim risk perceptions method as described in claim 1, which is characterized in that the step S4 is according to electric network swim
Figure to power grid carry out risk perceptions early warning, specifically include it is following step by step:
S401, warning information is obtained, positioning and display alarm generation position in electric network current diagram；
S402, the chart spacing that fault element connection is cut out according to power grid topological relation, to the associated data of the chart spacing with
And topological relation is coloured；
S403, it is based on power grid topological relation, the chart spacing and the fault element is spliced, and generate fault detail letter
Breath figure；
It is S404, the background color of electric network current diagram is dimmed, highlight the fault detail hum pattern.
9. electric network swim risk perceptions method as claimed in claim 7, which is characterized in that in the step S402, according to electricity
Net topology relationship cuts out the chart spacing of fault element connection, specially
Centered on the faulty line where fault element, the two sides tie point of faulty line is found on tidal current chart；
The force device that two sides tie point is separately connected is searched in the power grid topological relation of grid topology data record；
The plant stand where the force device of two sides is searched, where searching for the force device in the plant stand figure of the force device respectively
Chart spacing cuts out the chart spacing of fault element connection respectively in the plant stand figure of both ends force device.
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Application publication date: 20190906 |
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