CN106779444B - The active plan load flow rectification method and apparatus extended out based on electric network model - Google Patents
The active plan load flow rectification method and apparatus extended out based on electric network model Download PDFInfo
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Abstract
The invention provides a kind of active plan load flow rectification method and apparatus extended out based on electric network model.Wherein, this method includes：The sensitivity of the line node of the electric power networks in current scheduling region is calculated according to the system frequency response characteristics of electric power networks topological model data and electric power networks topological model；According to the local scheduling planning data and the electric power networks topological model data of higher level's dispatcher-controlled territory and unit planning data in sensitivity, current scheduling region, equivalent calculation is carried out to the interconnection between current scheduling region and higher level's dispatcher-controlled territory, and the boundary parameter of the electric power networks topological model in current scheduling region is configured；The electric power networks topological model in current scheduling region after being set according to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit planning data, sensitivity and boundary parameter, the active plan trend in adjustment current scheduling region.The present invention improves the accuracy of plan Load flow calculation.
Description
Technical field
The present invention relates to technical field of electric power, is adjusted more particularly, to a kind of active plan trend extended out based on electric network model
Adjusting method and device.
Background technology
Plan Load flow calculation in electric power networks refers in given power system network topology, component parameters and generating, born
Under lotus parameter conditions, the distribution of active power, reactive power and voltage in power network is calculated.The plan trend of power network is calculated,
And out-of-limit transmission line of electricity and section are adjusted according to power flow solutions, it is one of key point of security constrained economic dispatch.
In Load flow calculation, tie line plan produces large effect to electric network swim；However, in the prior art, tradition
The method accuracy that tie line plan is split to related physical circuit according to historical experience it is relatively low；Specifically, conventional spirit
Basis of sensitivity analysis limitation is larger, and the distribution coefficient of plan day exchange plan and dominant eigenvalues is formed by the similar daily record of history
Deviation is larger, and the trend precision for causing to be calculated according to it can not meet engineering requirements.
For above-mentioned plan Load flow calculation accuracy it is relatively low the problem of, not yet propose effective solution at present.
The content of the invention
In view of this, it is an object of the invention to provide a kind of active plan load flow rectification side extended out based on electric network model
Method and device, to improve the accuracy for planning Load flow calculation.
In a first aspect, the embodiments of the invention provide a kind of active plan load flow rectification side extended out based on electric network model
Method, including：Obtain the local scheduling planning data in current scheduling region；Wherein, local scheduling planning data includes power network
Network topological model data and repair schedule data；Electric power networks topological model data include electric power networks topological relation and element is joined
Number；Current scheduling area is calculated according to the system frequency response characteristics of electric power networks topological model data and electric power networks topological model
The sensitivity of the line node of electric power networks in domain, wherein, the sensitivity of the line node of the electric power networks includes calculating
The sensitivity of circuit DC power flow and calculating new sensitivity matrix；Obtain higher level's dispatcher-controlled territory corresponding to current scheduling region
Electric power networks topological model data and unit planning data；Wherein, current scheduling region passes through interconnection with higher level's dispatcher-controlled territory
Connection；According to the electric power networks of the local scheduling planning data in sensitivity, current scheduling region and higher level's dispatcher-controlled territory topology
Model data and unit planning data, equivalent calculation is carried out to the interconnection between current scheduling region and higher level's dispatcher-controlled territory,
And the boundary parameter of the electric power networks topological model in current scheduling region is configured according to the result of equivalent calculation, border
Parameter includes the parameter of the interconnection between current scheduling region and higher level's dispatcher-controlled territory, wherein, it is described to the current scheduling area
Interconnection between domain and higher level's dispatcher-controlled territory, which carries out equivalent calculation, includes the final active power according to interconnection, uses
Power grid equivalence method, equivalent processing is carried out to interconnection；According to local scheduling planning data, working as after boundary parameter is set is calculated
The system loading predicted value of electric power networks topological model in preceding dispatcher-controlled territory；Dispatched according to local scheduling planning data, higher level
The electric power networks topological model data and unit planning data in region, sensitivity and boundary parameter set after current scheduling region
Interior electric power networks topological model, the active plan trend in adjustment current scheduling region；
It is above-mentioned to be calculated according to the system frequency response characteristics of electric power networks topological model data and electric power networks topological model
The sensitivity of the line node of electric power networks in current scheduling region, including：Calculate circuit DC power flow sensitivity Ski=
(Xpi-Xqi)/Xk；Wherein, SkiFor sensitivity of the Line Flow to i-th of node active power output of kth bar circuit, XpiAnd XqiFor
Corresponding impedance value, X in DC power flow impedance matrixkFor circuit k impedance；Calculate new sensitivity matrix
Wherein, SxuFor conventional sensitivity matrix, FuFor the coefficient matrix after quasi-steady state physics corresponding linear, αiFor i-th
Coefficient is shared in individual bus power injection.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, on
State according to the local scheduling planning data and the electric power networks topological model of higher level's dispatcher-controlled territory in sensitivity, current scheduling region
Data and unit planning data, equivalent calculation, and root are carried out to the interconnection between current scheduling region and higher level's dispatcher-controlled territory
The boundary parameter of the electric power networks topological model in current scheduling region is configured according to the result of equivalent calculation, including：Root
According to the local scheduling planning data in sensitivity, current scheduling region and the electric power networks topological model data of higher level's dispatcher-controlled territory
With unit planning data, the initial active power of interconnection is calculated；According to the initial active power accumulated value of interconnection and in advance
The difference of the exchange plan data of storage, calculate the final active power of interconnection；According to the final active power of interconnection, adopt
With power grid equivalence method, equivalent processing is carried out to interconnection；Wherein, equivalent processing is including interconnection equivalence into unit or is born
Lotus；According to the interconnection and repair schedule data after equivalent handle, border is set to the electric power networks topological model of current region
Parameter.
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide second of first aspect
Possible embodiment, wherein, above-mentioned local scheduling planning data and higher level scheduling according in sensitivity, current scheduling region
The electric power networks topological model data and unit planning data in region, the initial active power of interconnection is calculated, including：Calculate connection
The initial active power of winding threadWherein, M is system node number, Lk
(t) it is the active power of kth bar interconnection t periods, Pi(t) it is the active power of t periods node i injection, li(t) it is the t periods
Point i burden with power, Ski(t) it is sensitivity of the t period kth bar interconnections to node i；According to the initial active power of interconnection
The difference of accumulated value and the exchange plan data prestored, the final active power of interconnection is calculated, including：Calculate interconnection
Final active power Its
In,For the final active power of kth bar interconnection t periods, △ p (t) are that t periods exchange plan and interconnection are cumulative
Deviation, λkFor distribution coefficient, N is the total number of interconnection.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the third of first aspect, wherein, on
State according to local scheduling planning data, calculate electric power networks topological model in the current scheduling region after boundary parameter is set
System loading predicted value, including：The active amount of unbalance of computing systemWherein, PL(t) it is the system of t periods
Load prediction, Pc(t) it is station service, Ps(t) it is network loss, Pun(t) it is not model the cumulative output of small unit, Pb,i(t) it is the t periods
The load prediction of i-th of bus, K are bus load total quantity；Calculate bus distribution coefficientWherein, γi(t) it is the distribution coefficient of i-th of bus of t periods；After calculating adjustment
Bus load predicted valueWherein,After adjustment for i-th of bus of t periods
Predicted load.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 4th of first aspect kind, wherein, on
State according to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit planning data, sensitive
The electric power networks topological model in current scheduling region after degree and boundary parameter setting, the active meter in adjustment current scheduling region
Trend is drawn, including：According to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit plan
The electric power networks topological model in current scheduling region after data, sensitivity and boundary parameter setting, calculates current scheduling area
The active plan trend in domain；The active plan trend in the current scheduling region prestored according to result of calculation adjustment.
Second aspect, the embodiments of the invention provide a kind of active plan load flow rectification dress extended out based on electric network model
Put, including：First acquisition module, for obtaining the local scheduling planning data in current scheduling region；Wherein, local scheduling meter
Drawing data includes electric power networks topological model data and repair schedule data；Electric power networks topological model data include electric power networks
Topological relation and component parameters；Calculation of Sensitivity module, for according to electric power networks topological model data and electric power networks topology
The system frequency response characteristics of model calculate the sensitivity of the line node of the electric power networks in current scheduling region, wherein, institute
Stating the sensitivity of the line node of electric power networks includes calculating the sensitivity of circuit DC power flow and calculates new sensitivity matrix；
Second acquisition module, for obtaining the electric power networks topological model data and machine of higher level's dispatcher-controlled territory corresponding to current scheduling region
Group planning data；Wherein, current scheduling region is connected with higher level's dispatcher-controlled territory by interconnection；Boundary parameter setup module, use
The electric power networks topological model of local scheduling planning data and higher level's dispatcher-controlled territory according to sensitivity, current scheduling region
Data and unit planning data, equivalent calculation, and root are carried out to the interconnection between current scheduling region and higher level's dispatcher-controlled territory
The boundary parameter of the electric power networks topological model in current scheduling region is configured according to the result of equivalent calculation, boundary parameter
Include the parameter of the interconnection between current scheduling region and higher level's dispatcher-controlled territory, wherein, it is described to the current scheduling region with
Interconnection between higher level's dispatcher-controlled territory, which carries out equivalent calculation, includes the final active power according to interconnection, using power network
Equivalence method, equivalent processing is carried out to interconnection；Predictor calculation module, for according to local scheduling planning data, calculating side
The system loading predicted value of the electric power networks topological model in current scheduling region after boundary's parameter setting；Active plan trend is adjusted
Mould preparation block, for according to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit plan
The electric power networks topological model in current scheduling region after data, sensitivity and boundary parameter setting, adjustment current scheduling area
The active plan trend in domain；
Above-mentioned Calculation of Sensitivity module includes：First computing unit, for calculating circuit DC power flow sensitivity Ski=
(Xpi-Xqi)/Xk；Wherein, SkiFor sensitivity of the Line Flow to i-th of node active power output of kth bar circuit, XpiAnd XqiFor
Corresponding impedance value, X in DC power flow impedance matrixkFor circuit k impedance；Second computing unit, for calculating quasi-steady state spirit
Sensitive matrix Wherein, SxuIt is sensitive for routine
Spend matrix, FuFor the coefficient matrix after quasi-steady state physics corresponding linear, αiCoefficient is shared for i-th of bus power injection.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the first of second aspect, wherein, on
Stating boundary parameter setup module includes：Initial active power calculates unit, for according to the sheet in sensitivity, current scheduling region
The electric power networks topological model data and unit planning data of ground dispatch plan data and higher level's dispatcher-controlled territory, calculate interconnection
Initial active power；Final active power calculates unit, for according to the initial active power accumulated value of interconnection with depositing in advance
The difference of the exchange plan data of storage, calculate the final active power of interconnection；Equivalent processing unit, for according to interconnection
Final active power, using power grid equivalence method, equivalent processing is carried out to interconnection；Wherein, equivalent processing is included interconnection
It is equivalent into unit or load；Boundary parameter setting unit, for according to the interconnection and repair schedule data after equivalent handle,
Boundary parameter is set to the electric power networks topological model of current region.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of second of second aspect, wherein, on
Stating predictor calculation module includes：Active amount of unbalance computing unit, the active amount of unbalance for computing systemWherein, PL(t) it is the system of t periods
Load prediction, Pc(t) it is station service, Ps(t) it is network loss, Pun(t) it is not model the cumulative output of small unit, Pb,i(t) it is the t periods
The load prediction of i-th of bus, K are bus load total quantity；Bus distribution coefficient computing unit, for calculating bus distribution system
Number Wherein, γi(t) it is the distribution coefficient of i-th of bus of t periods；Bus load is pre-
Measured value computing unit, for calculating the bus load predicted value after adjustingWherein,
For the predicted load after the adjustment of i-th of bus of t periods.
The embodiment of the present invention brings following beneficial effect：
A kind of active plan load flow rectification method and apparatus extended out based on electric network model provided in an embodiment of the present invention, lead to
The line for the electric power networks crossed in the system frequency response characteristics calculating current scheduling region of electric power networks topological model and the model
The sensitivity of circuit node；According to the electric power networks topological model of the sensitivity, local scheduling planning data and higher level's dispatcher-controlled territory
Data and unit planning data, equivalent calculation is carried out to interconnection, and according to the result of equivalent calculation in current scheduling region
The boundary parameter of electric power networks topological model be configured；And according to local scheduling planning data, the electricity of higher level's dispatcher-controlled territory
The electric power in current scheduling region after power network topology model data and unit planning data, sensitivity and boundary parameter setting
Network topology model, the active plan trend in adjustment current scheduling region.Aforesaid way improves the accurate of plan Load flow calculation
Property.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in accompanying drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of stream of the active plan load flow rectification method extended out based on electric network model provided in an embodiment of the present invention
Cheng Tu；
Fig. 2 be a kind of active plan load flow rectification method extended out based on electric network model provided in an embodiment of the present invention in,
The particular flow sheet being configured to the boundary parameter of the electric power networks topological model in current scheduling region；
Fig. 3 is a kind of knot of the active plan load flow rectification device extended out based on electric network model provided in an embodiment of the present invention
Composition；
Fig. 4 be a kind of active plan load flow rectification device extended out based on electric network model provided in an embodiment of the present invention in,
The concrete structure schematic diagram of boundary parameter setup module.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
The problem of accuracy for planning Load flow calculation is relatively low, the embodiments of the invention provide one kind to be based on electric network model
The active plan load flow rectification method and apparatus extended out；The technology can apply to power generation operating agency and carry out security constraint
In calculating power network plan trend in economic load dispatching；It is described below by embodiment.
Embodiment one：
A kind of flow chart of active plan load flow rectification method extended out based on electric network model shown in Figure 1, the party
Method comprises the following steps：
Step S102, obtain the local scheduling planning data in current scheduling region；Wherein, the local scheduling planning data
Including electric power networks topological model data and repair schedule data；The electric power networks topological model data include electric power networks topology
Relation and component parameters；
Specifically, the local scheduling planning data in above-mentioned current scheduling region can be closed in electric administrative department with slave phase
Obtained in EMS.
Step S104, according to electric power networks topological model data and the system frequency response characteristics of electric power networks topological model
Calculate the sensitivity of the line node of the electric power networks in current scheduling region；
, can be with when the balancing machine in diverse location absorbs the fractional increments of other generator powers in power system
Different influences is produced to current trend distribution, and when system has larger active amount of unbalance, this part is uneven
Amount all will be undertaken by balancing machine, and causing balancing machine, nearby branch road sensitivity is larger.However, according to electric power networks topological model number
The line node of the electric power networks in current scheduling region is calculated according to the system frequency response characteristics with electric power networks topological model
Sensitivity, unbalanced power amount will undertake according to system frequency response characteristics by each generator or load, reduce balancing machine
Influence of the selection to Load flow calculation.
Step S106, obtain the electric power networks topological model data and machine of higher level's dispatcher-controlled territory corresponding to current scheduling region
Group planning data；Wherein, current scheduling region is connected with higher level's dispatcher-controlled territory by interconnection；
Specifically, higher level's dispatcher-controlled territory corresponding to current scheduling region can be obtained by intelligent grid Dispatching Control System
Electric power networks topological model data and unit planning data.
Step S108, according to the local scheduling planning data in sensitivity, current scheduling region and higher level's dispatcher-controlled territory
Electric power networks topological model data and unit planning data, enter to the interconnection between current scheduling region and higher level's dispatcher-controlled territory
Row equivalent calculation, and the boundary parameter of the electric power networks topological model in current scheduling region is entered according to the result of equivalent calculation
Row is set, and the boundary parameter includes the parameter of the interconnection between current scheduling region and higher level's dispatcher-controlled territory；
Specifically, border of the above-mentioned result according to equivalent calculation to the electric power networks topological model in current scheduling region
Parameter is configured, and can also be realized in the following manner：By the interconnection after equivalent calculation, repair schedule data and electric power networks
Topological model carries out splicing, generates complete electric power networks topological model.
Step S110, according to local scheduling planning data, calculate the electricity in the current scheduling region after boundary parameter is set
The system loading predicted value of power network topology model；
, it is necessary to consider that power plant itself electricity consumption, power system network are lost in the actual moving process of power system
Influence, it is necessary to the bus load predicted value in system loading predicted value be adjusted, by active injustice in system when active uneven
Measurement is assigned on each bus according to distribution coefficient, the bus load predicted value formed after adjustment.
Step S112, according to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and machine
The electric power networks topological model in current scheduling region after group planning data, sensitivity and boundary parameter setting, adjustment are current
The active plan trend of dispatcher-controlled territory.
Specifically, above-mentioned parameters can be inputted into Load Flow Calculation Software and carries out Load flow calculation, the Load flow calculation
Can be above-mentioned active plan trend or idle plan trend.Further, when branch road or section, trend occur out-of-limit
When, then the sensitivity of out-of-limit branch road and section is calculated, and increase network constraint and planning is re-started into economic load dispatching, adjust
Whole unit output, until all constraint satisfactions.
A kind of active plan load flow rectification method extended out based on electric network model provided in an embodiment of the present invention, passes through electric power
The system frequency response characteristics of network topology model and the model calculate the line node of the electric power networks in current scheduling region
Sensitivity；According to the electric power networks topological model data of the sensitivity, local scheduling planning data and higher level's dispatcher-controlled territory and
Unit planning data, equivalent calculation is carried out to interconnection, and according to the result of equivalent calculation to the electric power in current scheduling region
The boundary parameter of network topology model is configured；And according to local scheduling planning data, the electric power networks of higher level's dispatcher-controlled territory
The electric power networks in current scheduling region after topological model data and unit planning data, sensitivity and boundary parameter setting are opened up
Flutter model, the active plan trend in adjustment current scheduling region.Aforesaid way improves the accuracy of plan Load flow calculation.
It is above-mentioned according to electric power networks topological model data and electric power networks topology in order to improve the accuracy of Calculation of Sensitivity
The system frequency response characteristics of model calculate the sensitivity of the line node of the electric power networks in current scheduling region, including as follows
Step：
(1) circuit DC power flow sensitivity S is calculatedki=(Xpi-Xqi)/Xk；Wherein, SkiFor the Line Flow of kth bar circuit
Sensitivity to i-th of node active power output, XpiAnd XqiFor corresponding impedance value in DC power flow impedance matrix, XkFor circuit k
Impedance；
(2) new sensitivity matrix is calculated
Wherein, SxuFor conventional sensitivity matrix, FuFor the coefficient matrix after quasi-steady state physics corresponding linear, αiFor i-th
Coefficient is shared in individual bus power injection.
Aforesaid way reduces balancing machine and selects influence to Load flow calculation by the method for solving of steady quasi- state sensitivity,
The limitation of conventional sensitivity analysis is reduced, and then improves the accuracy of sensitivity.
In order to improve the accuracy of the equivalent processing of interconnection, shown in Figure 2 a kind of had based on what electric network model extended out
In work(plan load flow rectification method, the tool that is configured to the boundary parameter of the electric power networks topological model in current scheduling region
Body flow chart；The electric power of above-mentioned local scheduling planning data and higher level's dispatcher-controlled territory according in sensitivity, current scheduling region
Network topology model data and unit planning data, the interconnection between current scheduling region and higher level's dispatcher-controlled territory is carried out etc.
Value is calculated, and the boundary parameter of the electric power networks topological model in current scheduling region is set according to the result of equivalent calculation
Put, comprise the following steps：
Step S202, according to the local scheduling planning data in sensitivity, current scheduling region and higher level's dispatcher-controlled territory
Electric power networks topological model data and unit planning data, calculate the initial active power of interconnection；
Specifically, above-mentioned steps S202 can be accomplished in the following manner：
Calculate the initial active power of interconnectionWherein, M is
System node number, Lk(t) it is the active power of kth bar interconnection t periods, Pi(t) it is the active power of t periods node i injection,
li(t) it is the burden with power of t period node is, Ski(t) it is sensitivity of the t period kth bar interconnections to node i；
On the basis of this dispatcher-controlled territory, according to interconnector, by electric network model external extension to related to interconnector
Perimeter, and combine the planning data of external electrical network obtained, joined by DC power flow and Calculation of Sensitivity
The plan trend on winding thread road.Aforesaid way can obtain more accurate interconnector trend.
Step S204, according to the initial active power accumulated value of interconnection and the difference of the exchange plan data prestored
Value, calculate the final active power of interconnection；
Specifically, above-mentioned steps S204 can be accomplished in the following manner：
Calculate the final active power of interconnection Wherein,For kth bar
The final active power of interconnection t periods, the deviation that △ p (t) add up for t periods exchange plan and interconnection, λkIt is for distribution
Number, N are the total number of interconnection.
In actual applications, due to reasons such as calculation error, prediction deviations, each interconnector active power is cumulative and hands over
The plan of changing can have deviation, i.e., above-mentioned △ p (t), and the scope of the deviation is 2%-8%, it is therefore desirable to above-mentioned initial wattful power
Rate is adjusted again, is allowed to consistent with exchange plan.The trend of the interconnection of acquisition can be made more accurate through the above way.
Step S206, according to the final active power of interconnection, using power grid equivalence method, equivalent place is carried out to interconnection
Reason；Wherein, equivalence processing is included interconnection equivalence into unit or load；
Step S208, according to the interconnection and repair schedule data after equivalent handle, the electric power networks of current region are opened up
Flutter model and boundary parameter is set.
In order that the active power of system reaches balance, and it is above-mentioned according to local scheduling planning data, calculate boundary parameter and set
The system loading predicted value of the electric power networks topological model in current scheduling region postponed, comprises the following steps：
(1) the active amount of unbalance of computing system Wherein, PL(t) predicted for the system loading of t periods, Pc(t) it is station service, Ps(t) it is network loss, Pun(t)
Not model the cumulative output of small unit, Pb,i(t) it is the load prediction of i-th of bus of t periods, K is bus load total quantity；
Above-mentioned station service typically constitutes from the ratio that system meets determination, can be obtained from historical data.Network Loss Rate is not according to
With scale power network, can span be 1.1%-1.4%.
(2) bus distribution coefficient is calculatedWherein, γi(t) it is the t periods i-th
The distribution coefficient of individual bus；
(3) the bus load predicted value after adjustment is calculatedWherein,For t when
Predicted load after the adjustment of i-th of bus of section.
Above-mentioned to be assigned to active amount of unbalance on each bus according to distribution coefficient, the bus load formed after adjustment is pre-
Measured value.
Further, it is above-mentioned according to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory
The electric power networks topological model in current scheduling region after being set with unit planning data, sensitivity and boundary parameter, adjustment
The active plan trend in current scheduling region, comprises the following steps：
(1) according to local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit plan
The electric power networks topological model in current scheduling region after data, sensitivity and boundary parameter setting, calculates current scheduling area
The active plan trend in domain；
(2) the active plan trend in the current scheduling region prestored according to result of calculation adjustment.
Aforesaid way can adjust the active plan trend in current scheduling region, the data of plan trend is more nearly reality
Border trend, lower power flow solutions deviation.
Embodiment two：
Corresponding to above method embodiment, a kind of active plan trend extended out based on electric network model shown in Figure 3
The structure chart of adjusting apparatus, the device include such as lower part：
First acquisition module 302, for obtaining the local scheduling planning data in current scheduling region；Wherein, it is local to adjust
Degree planning data includes electric power networks topological model data and repair schedule data；The electric power networks topological model data include electricity
Power network topology and component parameters；
Calculation of Sensitivity module 304, for being according to electric power networks topological model data and electric power networks topological model
Frequency response characteristic of uniting calculates the sensitivity of the line node of the electric power networks in current scheduling region；
Second acquisition module 306, for obtaining the electric power networks topology of higher level's dispatcher-controlled territory corresponding to current scheduling region
Model data and unit planning data；Wherein, current scheduling region is connected with higher level's dispatcher-controlled territory by interconnection；
Boundary parameter setup module 308, for according to the local scheduling planning data in sensitivity, current scheduling region and
The electric power networks topological model data and unit planning data of higher level's dispatcher-controlled territory, to current scheduling region and higher level's dispatcher-controlled territory
Between interconnection carry out equivalent calculation, and according to the result of equivalent calculation to the electric power networks Top Modules in current scheduling region
The boundary parameter of type is configured, and the boundary parameter includes the ginseng of the interconnection between current scheduling region and higher level's dispatcher-controlled territory
Number；
Predictor calculation module 310, for according to local scheduling planning data, calculating the current tune after boundary parameter is set
The system loading predicted value for the electric power networks topological model spent in region；
Active plan load flow rectification module 312, for the power network according to local scheduling planning data, higher level's dispatcher-controlled territory
The electric power networks in current scheduling region after network topological model data and unit planning data, sensitivity and boundary parameter setting
Topological model, the active plan trend in adjustment current scheduling region.
A kind of active plan load flow rectification device extended out based on electric network model provided in an embodiment of the present invention, passes through electric power
The system frequency response characteristics of network topology model and the model calculate the line node of the electric power networks in current scheduling region
Sensitivity；According to the electric power networks topological model data of the sensitivity, local scheduling planning data and higher level's dispatcher-controlled territory and
Unit planning data, equivalent calculation is carried out to interconnection, and according to the result of equivalent calculation to the electric power in current scheduling region
The boundary parameter of network topology model is configured；And according to local scheduling planning data, the electric power networks of higher level's dispatcher-controlled territory
The electric power networks in current scheduling region after topological model data and unit planning data, sensitivity and boundary parameter setting are opened up
Flutter model, the active plan trend in adjustment current scheduling region.Aforesaid way improves the accuracy of plan Load flow calculation.
In order to improve the accuracy of Calculation of Sensitivity, above-mentioned Calculation of Sensitivity module includes：
(1) first computing unit, for calculating circuit DC power flow sensitivity Ski=(Xpi-Xqi)/Xk；Wherein, SkiFor
Sensitivity of the Line Flow of k bar circuits to i-th of node active power output, XpiAnd XqiTo be corresponded in DC power flow impedance matrix
Impedance value, XkFor circuit k impedance；
(2) second computing units, for calculating new sensitivity matrix
Wherein, SxuFor conventional sensitivity matrix, FuFor the coefficient matrix after quasi-steady state physics corresponding linear, αiFor i-th
Coefficient is shared in individual bus power injection.
Aforesaid way reduces balancing machine and selects influence to Load flow calculation by the method for solving of steady quasi- state sensitivity,
The limitation of conventional sensitivity analysis is reduced, and then improves the accuracy of sensitivity.
In order to improve the accuracy of the equivalent processing of interconnection, shown in Figure 4 a kind of had based on what electric network model extended out
In work(plan load flow rectification device, the concrete structure schematic diagram of boundary parameter setup module；The boundary parameter setup module includes
Such as lower part：
Initial active power calculates unit 402, for according to the local scheduling quota in sensitivity, current scheduling region
According to the electric power networks topological model data and unit planning data with higher level's dispatcher-controlled territory, the initial wattful power of interconnection is calculated
Rate；
Final active power calculates unit 404, for according to the initial active power accumulated value of interconnection with prestoring
Exchange plan data difference, calculate the final active power of interconnection；
Equivalent processing unit 406, for the final active power according to interconnection, using power grid equivalence method, to contact
Line carries out equivalent processing；Wherein, equivalent processing is included interconnection equivalence into unit or load；
Boundary parameter setting unit 408, for the interconnection and repair schedule data after being handled according to equivalence, to working as proparea
The electric power networks topological model in domain sets boundary parameter.
The trend of the interconnection of acquisition can be made more accurate through the above way.
In order that the active power of system reaches balance, above-mentioned predictor calculation module includes such as lower part：
(1) active amount of unbalance computing unit, the active amount of unbalance for computing system
Wherein, PL(t) when being t
The system loading prediction of section, Pc(t) it is station service, Ps(t) it is network loss, Pun(t) it is not model the cumulative output of small unit, Pb,i(t)
For the load prediction of i-th of bus of t periods, K is bus load total quantity；
(2) bus distribution coefficient computing unit, for calculating bus distribution coefficient
Wherein, γi(t) it is the distribution coefficient of i-th of bus of t periods；
(3) bus load predictor calculation unit, for calculating the bus load predicted value after adjustingWherein,For the predicted load after the adjustment of i-th of bus of t periods.
Above-mentioned to be assigned to active amount of unbalance on each bus according to distribution coefficient, the bus load formed after adjustment is pre-
Measured value.
A kind of active plan load flow rectification method and apparatus extended out based on electric network model provided in an embodiment of the present invention, lead to
Cross network model and adaptively adjust progress interconnection external network equivalent, the interconnection equivalence method with routine is by history similar day
Information is formed and topic exchange plan is compared with the distribution coefficient of dominant eigenvalues, the interconnection trend that adaptive equivalent method calculates
It is more nearly actual trend；The influence of multiple units and load to the circuit near balancing machine is shared by new sensitivity
The whole network has been arrived, has reduced the error of power flow solutions.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-OnlyMemory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：Embodiment described above, it is only the embodiment of the present invention, to illustrate the present invention
Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical scheme of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (8)
- A kind of 1. active plan load flow rectification method extended out based on electric network model, it is characterised in that including：Obtain the local scheduling planning data in current scheduling region；Wherein, the local scheduling planning data includes power network Network topological model data and repair schedule data；The electric power networks topological model data include electric power networks topological relation and member Part parameter；Calculated according to the system frequency response characteristics of the electric power networks topological model data and the electric power networks topological model The sensitivity of the line node of electric power networks in current scheduling region, wherein, the line node of the electric power networks it is sensitive Degree includes calculating the sensitivity of circuit DC power flow and calculates new sensitivity matrix；Obtain the electric power networks topological model data and unit quota of higher level's dispatcher-controlled territory corresponding to the current scheduling region According to；Wherein, the current scheduling region is connected with higher level's dispatcher-controlled territory by interconnection；According to the local scheduling planning data and the electricity of higher level's dispatcher-controlled territory in the sensitivity, the current scheduling region Power network topology model data and unit planning data, to the connection between the current scheduling region and higher level's dispatcher-controlled territory Winding thread carries out equivalent calculation, and according to the result of the equivalent calculation to the electric power networks Top Modules in the current scheduling region The boundary parameter of type is configured, and the boundary parameter includes the connection between the current scheduling region and higher level's dispatcher-controlled territory The parameter of winding thread, wherein, the interconnection between the current scheduling region and higher level's dispatcher-controlled territory carries out equivalent The final active power included according to interconnection is calculated, using power grid equivalence method, equivalent processing is carried out to interconnection；According to the local scheduling planning data, the electric power networks in the current scheduling region after boundary parameter is set are calculated The system loading predicted value of topological model；According to the local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit plan The electric power networks topological model in the current scheduling region after data, the sensitivity and boundary parameter setting, adjusts institute State the active plan trend in current scheduling region；It is described according to the electric power networks topological model data and the system frequency response characteristics of the electric power networks topological model The sensitivity of the line node of the electric power networks in current scheduling region is calculated, including：Calculate circuit DC power flow sensitivity Ski=(Xpi-Xqi)/Xk；Wherein, SkiFor kth bar circuit Line Flow to i-th The sensitivity of node active power output, XpiAnd XqiFor corresponding impedance value in DC power flow impedance matrix, XkFor circuit k impedance；Calculate new sensitivity matrixWherein, SxuFor conventional sensitivity matrix, FuFor the coefficient matrix after quasi-steady state physics corresponding linear, αiFor i-th of bus Coefficient is shared in power injection.
- 2. according to the method for claim 1, it is characterised in that described according to the sensitivity, the current scheduling region Interior local scheduling planning data and the electric power networks topological model data and unit planning data of higher level's dispatcher-controlled territory are right Interconnection between the current scheduling region and higher level's dispatcher-controlled territory carries out equivalent calculation, and according to the equivalent calculation Result the boundary parameter of the electric power networks topological model in the current scheduling region is configured, including：According to the local scheduling planning data and the electricity of higher level's dispatcher-controlled territory in the sensitivity, the current scheduling region Power network topology model data and unit planning data, calculate the initial active power of interconnection；According to the initial active power accumulated value of the interconnection and the difference of exchange plan data prestored, described in calculating The final active power of interconnection；According to the final active power of the interconnection, using power grid equivalence method, equivalent processing is carried out to the interconnection；Its In, the equivalent processing is included the interconnection equivalence into unit or load；According to the interconnection after equivalent handle and the repair schedule data, to the electric power networks topology of current region Model sets boundary parameter.
- 3. according to the method for claim 2, it is characterised in that described according to the sensitivity, the current scheduling region Interior local scheduling planning data and the electric power networks topological model data and unit planning data of higher level's dispatcher-controlled territory, meter The initial active power of interconnection is calculated, including：Calculate the initial active power of interconnectionWherein, M is system node number, Lk(t) when being kth bar interconnection t The active power of section, Pi(t) it is the active power of t periods node i injection, li(t) it is the burden with power of t period node is, Ski (t) it is sensitivity of the t period kth bar interconnections to node i；The difference of the initial active power accumulated value according to the interconnection and the exchange plan data prestored, calculate The final active power of the interconnection, including：Calculate the final active power of interconnectionWherein,For kth The final active power of bar interconnection t periods, the deviation that △ p (t) add up for t periods exchange plan and interconnection, λkFor distribution Coefficient, N are the total number of interconnection.
- 4. according to the method for claim 1, it is characterised in that it is described according to the local scheduling planning data, calculate side The system loading predicted value of the electric power networks topological model in the current scheduling region after boundary's parameter setting, including：The active amount of unbalance of computing system Wherein, PL(t) predicted for the system loading of t periods, Pc(t) it is station service, Ps(t) it is network loss, Pun(t) it is not model small unit It is cumulative to contribute, Pb,i(t) it is the load prediction of i-th of bus of t periods, K is bus load total quantity；Calculate bus distribution coefficientWherein, γi(t) it is i-th of bus of t periods Distribution coefficient；Calculate the bus load predicted value after adjustmentWherein,For i-th of mother of t periods Predicted load after the adjustment of line.
- 5. according to the method for claim 1, it is characterised in that adjusted according to the local scheduling planning data, the higher level Spend the electric power networks topological model data in region and unit planning data, the sensitivity and boundary parameter set after described work as Electric power networks topological model in preceding dispatcher-controlled territory, the active plan trend in the current scheduling region is adjusted, including：According to the local scheduling planning data, the electric power networks topological model data of higher level's dispatcher-controlled territory and unit plan The electric power networks topological model in the current scheduling region after data, the sensitivity and boundary parameter setting, calculates institute State the active plan trend in current scheduling region；The active plan trend in the current scheduling region prestored according to result of calculation adjustment.
- A kind of 6. active plan load flow rectification device extended out based on electric network model, it is characterised in that including：First acquisition module, for obtaining the local scheduling planning data in current scheduling region；Wherein, the local scheduling meter Drawing data includes electric power networks topological model data and repair schedule data；The electric power networks topological model data include electric power Network topology and component parameters；Calculation of Sensitivity module, for being according to the electric power networks topological model data and the electric power networks topological model Frequency response characteristic of uniting calculates the sensitivity of the line node of the electric power networks in current scheduling region, wherein, the power network The sensitivity of the line node of network includes calculating the sensitivity of circuit DC power flow and calculates new sensitivity matrix；Second acquisition module, for obtaining the electric power networks topological model of higher level's dispatcher-controlled territory corresponding to the current scheduling region Data and unit planning data；Wherein, the current scheduling region is connected with higher level's dispatcher-controlled territory by interconnection；Boundary parameter setup module, for according to the local scheduling planning data in the sensitivity, the current scheduling region With the electric power networks topological model data and unit planning data of higher level's dispatcher-controlled territory, to the current scheduling region and institute State interconnection between higher level's dispatcher-controlled territory and carry out equivalent calculation, and according to the result of the equivalent calculation to the current scheduling The boundary parameter of electric power networks topological model in region is configured, the boundary parameter include the current scheduling region with The parameter of interconnection between higher level's dispatcher-controlled territory, wherein, it is described to the current scheduling region and higher level's dispatch area Interconnection between domain, which carries out equivalent calculation, includes the final active power according to interconnection, using power grid equivalence method, distich Winding thread carries out equivalent processing；Predictor calculation module, for according to the local scheduling planning data, calculating described current after boundary parameter is set The system loading predicted value of electric power networks topological model in dispatcher-controlled territory；Active plan load flow rectification module, for the electric power according to the local scheduling planning data, higher level's dispatcher-controlled territory In the current scheduling region after network topology model data and unit planning data, the sensitivity and boundary parameter setting Electric power networks topological model, adjust the active plan trend in the current scheduling region；The Calculation of Sensitivity module includes：First computing unit, for calculating circuit DC power flow sensitivity Ski=(Xpi-Xqi)/Xk；Wherein, SkiFor kth bar circuit Sensitivity of the Line Flow to i-th of node active power output, XpiAnd XqiFor corresponding impedance in DC power flow impedance matrix Value, XkFor circuit k impedance；Second computing unit, for calculating new sensitivity matrixWherein, SxuFor conventional sensitivity matrix, FuFor the coefficient matrix after quasi-steady state physics corresponding linear, αiFor i-th of bus Coefficient is shared in power injection.
- 7. device according to claim 6, it is characterised in that the boundary parameter setup module includes：Initial active power calculates unit, for according to the local scheduling plan in the sensitivity, the current scheduling region The electric power networks topological model data and unit planning data of data and higher level's dispatcher-controlled territory, calculating the initial of interconnection has Work(power；Final active power calculates unit, for the initial active power accumulated value according to the interconnection and the friendship prestored The difference of planning data is changed, calculates the final active power of the interconnection；Equivalent processing unit, for the final active power according to the interconnection, using power grid equivalence method, to the contact Line carries out equivalent processing；Wherein, the equivalent processing is included the interconnection equivalence into unit or load；Boundary parameter setting unit, for the interconnection after being handled according to equivalence and the repair schedule data, to current The electric power networks topological model in region sets boundary parameter.
- 8. device according to claim 6, it is characterised in that the predictor calculation module includes：Active amount of unbalance computing unit, the active amount of unbalance for computing system Wherein, PL(t) it is the system loading of t periods Prediction, Pc(t) it is station service, Ps(t) it is network loss, Pun(t) it is not model the cumulative output of small unit, Pb,i(t) it is i-th of t periods The load prediction of bus, K are bus load total quantity；Bus distribution coefficient computing unit, for calculating bus distribution coefficient Its In, γi(t) it is the distribution coefficient of i-th of bus of t periods；Bus load predictor calculation unit, for calculating the bus load predicted value after adjustingWherein,For the predicted load after the adjustment of i-th of bus of t periods.
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