CN106451463B - The method and apparatus of the steady section of heat in a kind of analysis loop network system - Google Patents
The method and apparatus of the steady section of heat in a kind of analysis loop network system Download PDFInfo
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- CN106451463B CN106451463B CN201610996806.XA CN201610996806A CN106451463B CN 106451463 B CN106451463 B CN 106451463B CN 201610996806 A CN201610996806 A CN 201610996806A CN 106451463 B CN106451463 B CN 106451463B
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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Abstract
The invention discloses a kind of methods of the steady section of heat in analysis loop network system.This method comprises: the target for obtaining the current trend of the first branch and second branch and pre-saving cut-offs the factor, target cut-offs the factor representation trend ratio that the first branch is shifted to second branch in the case where open circuit occurs in the first branch；The factor is cut-off according to the current trend of the first branch and second branch, the steady capacity of the heat of second branch and target, it calculates second branch and currently cut-offs the nargin factor in the case where first branch open circuit, current goal cut-offs the nargin of trend and heat steady capacity of the nargin factor representation second branch currently in the case where first branch open circuit after variation；If current goal cut-offs the nargin factor less than margin threshold, second branch is identified as Targeted Tributary, Targeted Tributary indicates the branch for currently occurring will appear under open circuit conditions overload phenomenon in the loop network system.In addition, the invention also discloses a kind of devices of the steady section of heat in analysis loop network system.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to the method and dress of the steady section of heat in a kind of analysis loop network system
It sets.
Background technique
In electric power loop network system, usually there is a large amount of branch.If open circuit fault, branch road occur for a branch
Trend before open circuit can be transferred to other branch road, so that the trend of other branch roads be caused to change.And other branch road
After producing power flow changing, it is possible to overload phenomenon can be generated.Occurs the branch overloaded in the case where in order to avoid open circuit fault
Road needs during loop network system transmits electric power in real time according to the flow situations of branch to the steady section of heat in loop network system
It is analyzed, to determine that the branch of overload will be will appear in the case where open circuit fault in real time.
Inventor has found that the reality of the steady section of heat in loop network system during loop network system transmits electric power
When analyze, need longer analysis time, this does not adapt to during loop network system transmits electric power Branch Power Flow situation frequency
Enough analysis efficiency requirements, problem not prompt enough is not achieved in the characteristics of numerous variation, the analysis so as to cause hot steady section.
Summary of the invention
The technical problem to be solved by the invention is to provide the methods and dress of the steady section of heat in a kind of analysis loop network system
Set, to shorten to the time that the steady section of heat is analyzed in real-time loop network system so that the analysis of the steady section of heat can and
When follow the Branch Power Flow situation frequently changed, so as to hot steady section control much sooner.
In a first aspect, in order to solve the above technical problems, the embodiment of the invention provides heat in a kind of analysis loop network system is steady
The method of section, comprising:
It obtains the current trend of the first branch and the current trend of second branch and the target pre-saved cut-offs the factor,
Wherein, the target cut-off factor representation in the case where there is open circuit in the first branch first branch to described second
The trend ratio of branch transfer；
Heat according to the current trend of the first branch, the current trend of the second branch, the second branch is steady
Capacity and the target pre-saved cut-off the factor, and it is current in the case where the first branch is breaking to calculate the second branch
Cut-off the nargin factor, wherein the current goal cut-offs second branch described in nargin factor representation currently in the first branch
The nargin of the steady capacity of trend and heat after changing in the case where open circuit；
If the current goal cut-offs the nargin factor less than margin threshold, the second branch is identified as target branch
Road, wherein the Targeted Tributary indicates the branch for currently occurring will appear under open circuit conditions overload phenomenon in the loop network system
Road.
Optionally, further includes:
Previously according to the branch impedance of the first branch, the branch impedance of the second branch, the first branch
The mutual resistance matrix of self-impedance matrix and the first branch and the second branch calculates the target and cut-offs the factor；
Wherein, the end node of the endpoint node in the mutual resistance matrix including the first branch and the second branch
Mutual impedance between point.
Optionally, further includes:
In pre-set branch trouble set, the first branch and the second branch are chosen；
Wherein, the branch in the branch trouble set is the branch that open circuit possible occur.
Optionally, the margin threshold is specially pre-set numerical value.
Optionally, if the second branch is identified as by the nargin factor of currently cut-offfing less than margin threshold
Targeted Tributary, comprising:
According to sequence from big to small, to currently the cut-offfing in the case where open circuit conditions occur of each branch in the loop network system
The nargin factor is ranked up；
If the sorting position of the current goal nargin factor knows the second branch after preset sorting position
It Wei not Targeted Tributary；
Wherein, the margin threshold is specially the current nargin factor on the preset sorting position.
Optionally, further includes:
In the case where the second branch is identified as Targeted Tributary, opened according to the margin threshold, the target
The current trend for the factor, the historical trend lower limit value of the first branch, the second branch of breaking calculates the steady section control of target heat
Value processed, wherein the steady control of section value of target heat corresponds to the sum of trend of the first branch and the second branch
Control requires；
By the steady control of section value of target heat, the trend of the first branch and the second branch is adjusted.
Second aspect, in order to solve the above technical problems, the embodiment of the invention provides heat in a kind of analysis loop network system is steady
The device of section, comprising:
First acquisition unit, for obtaining the current trend of the first branch and current trend and the preparatory guarantor of second branch
The target deposited cut-offs the factor, wherein it is described in the case where open circuit occurs in the first branch that the target cut-offs factor representation
The trend ratio that the first branch is shifted to the second branch；
First computing unit, for current trend, the current trend of the second branch, institute according to the first branch
The target stating the steady capacity of heat of second branch and pre-saving cut-offs the factor, and it is disconnected in the first branch to calculate the second branch
The nargin factor is currently cut-off in the case where road, wherein the current goal cut-offs second branch described in nargin factor representation and works as
The nargin of the preceding steady capacity of trend and heat in the case where the first branch is breaking after variation；
Recognition unit, if cut-offfing the nargin factor less than margin threshold, by the second branch for the current goal
It is identified as Targeted Tributary, wherein the Targeted Tributary expression currently occurs will appear under open circuit conditions in the loop network system
Overload the branch of phenomenon.
Optionally, further includes:
Second computing unit, the branch roadlock for branch impedance, the second branch previously according to the first branch
The self-impedance matrix of anti-, the described first branch and the mutual resistance matrix of the first branch and the second branch, calculate institute
It states target and cut-offs the factor；
Wherein, the end node of the endpoint node in the mutual resistance matrix including the first branch and the second branch
Mutual impedance between point.
Optionally, the margin threshold is specially pre-set numerical value.
Optionally, further includes:
Selection unit chooses the first branch and second described in pre-set branch trouble set
Road；
Wherein, the branch in the branch trouble set is the branch that open circuit possible occur.
Optionally, the recognition unit includes:
Sorting subunit, for open circuit to occur to each branch in the loop network system according to sequence from big to small
In the case of currently cut-off the nargin factor and be ranked up；
Identify subelement, if the sorting position for the current goal nargin factor after preset sorting position,
The second branch is identified as Targeted Tributary；
Wherein, the margin threshold is specially the current nargin factor on the preset sorting position.
Optionally, further includes:
Third computing unit, in the case where the second branch is identified as Targeted Tributary, according to the nargin
Threshold value, the target cut-off the current trend of the factor, the historical trend lower limit value of the first branch, the second branch,
Calculate the steady control of section value of target heat, wherein the steady control of section value of target heat corresponds to the first branch and described the
The control requirement of the sum of the trend of two branches；
Adjustment unit, for by the steady control of section value of target heat, adjusting the first branch and second described
The trend on road.:
Compared with prior art, the embodiment of the present invention has the advantage that
The method and apparatus that embodiment provides according to the present invention, to need to analyze any of hot steady section in loop network system
Two branches can precalculate described in the case where open circuit occurs in the first branch as the first branch and second branch
Trend ratio that the first branch is shifted to the second branch simultaneously saves as target and cut-offs the factor, transmits electric power in loop network system
During real-time online, the current trend of the available first branch and the current trend of second branch and the mesh pre-saved
Mark cut-offs the factor and according to the current trend of the first branch, the current trend of the second branch, the second branch
Hot steady capacity and the target pre-saved cut-off the factor and calculate the second branch in the case where the first branch is breaking
The nargin factor currently is cut-off, if the current goal cut-offs the nargin factor less than margin threshold, the second branch is identified
For Targeted Tributary, wherein it is currently disconnected in the first branch that the current goal cut-offs second branch described in nargin factor representation
The nargin of the steady capacity of trend and heat after changing in the case where road, the Targeted Tributary indicate currently to go out in the loop network system
It will appear the branch of overload phenomenon under existing open circuit conditions.It precalculates and saves it can be seen that cut-offfing the factor due to target
Without calculating during real-time online, calculation processing task involved in real-time online process mitigates significantly, therefore, in real time
The time that the steady section of heat is analyzed in loop network system is reduced online, thus the analysis of the steady section of heat can in time with
With the Branch Power Flow situation frequently changed, the control of the steady section of heat also can be much sooner.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow diagram for the method for analyzing the steady section of heat in loop network system in the embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram for the device for analyzing the steady section of heat in loop network system in the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Applicant has found after study, in the prior art, during loop network system transmits electric power, due to power flow transfer
Characteristic is complex, Branch Power Flow situation frequently changes, and the analysis of the steady section of heat cannot rely on the calculating of all cut-set mode, because
This, requires to be related to a large amount of calculation processing times to the analysis of the steady section of heat in loop network system each time during real-time online
Business, which results in need longer analysis time.But Branch Power Flow situation frequently changes during real-time online, this
Just need continually to analyze the steady section of heat in loop network system, and in analysis time longer situation, the analysis of the steady section of heat is just
Enough analysis efficiency requirements are not achieved, therefore the problem that the on-line analysis for resulting in hot steady section is not prompt enough.
To solve the above-mentioned problems, in embodiments of the present invention, to need to analyze any of hot steady section in loop network system
Two branches can precalculate described in the case where open circuit occurs in the first branch as the first branch and second branch
Trend ratio that the first branch is shifted to the second branch simultaneously saves as target and cut-offs the factor, transmits electric power in loop network system
During real-time online, the current trend of the available first branch and the current trend of second branch and the mesh pre-saved
Mark cut-offs the factor and according to the current trend of the first branch, the current trend of the second branch, the second branch
Hot steady capacity and the target pre-saved cut-off the factor and calculate the second branch in the case where the first branch is breaking
The nargin factor currently is cut-off, if the current goal cut-offs the nargin factor less than margin threshold, the second branch is identified
For Targeted Tributary, wherein it is currently disconnected in the first branch that the current goal cut-offs second branch described in nargin factor representation
The nargin of the steady capacity of trend and heat after changing in the case where road, the Targeted Tributary indicate currently to go out in the loop network system
It will appear the branch of overload phenomenon under existing open circuit conditions.It precalculates and saves it can be seen that cut-offfing the factor due to target
Without calculating during real-time online, calculation processing task involved in real-time online process mitigates significantly, therefore, in real time
The time that the steady section of heat is analyzed in loop network system is reduced online, thus the analysis of the steady section of heat can in time with
With the Branch Power Flow situation frequently changed, the control of the steady section of heat also can be much sooner.
With reference to the accompanying drawing, the various non-limiting embodiments that the present invention will be described in detail.
Illustrative methods
Referring to Fig. 1, a kind of flow chart for the method for analyzing the steady section of heat in loop network system in the embodiment of the present invention is shown.
In the present embodiment, the method for example can specifically include following steps:
S101, the current trend of the current trend for obtaining the first branch and second branch and the target that pre-saves are cut-off
The factor, wherein the target cut-off factor representation in the case where there is open circuit in the first branch first branch to institute
State the trend ratio of second branch transfer.
During real-time online, the trend of the trend of the first branch and the second branch may constantly occur
Variation.Therefore, described the is obtained when being directed to the first branch and the second branch every time and carrying out hot steady fractograph analysis
Current trend and the second branch current trend under current time of one branch under current time.Specifically, institute
The current trend for stating the first branch refers to effective power flow of the first branch under current time, and the second branch is worked as
Preceding trend refers to effective power flow of the second branch under current time.
It should be noted that in order to simplify the calculation processing task that real-time online analyzes the steady section of heat in the process, looped network system
It is needed in system for on-line analysis, target corresponding with the first branch and the second branch, which cut-offs the factor, can be
It precalculates and saves.Wherein, the target, which cut-offs the factor, can reflect the trend change of second branch after first branch open circuit
Change, specifically, the target, which cut-offs the factor, can indicate that the target cut-offs factor representation and open circuit occurs in the first branch
In the case where the trend ratio that is shifted to the second branch of the first branch, that is, the target, which cut-offs the factor, to lead to
Following equation 1 is crossed to embody:
Formula 1:
Wherein,Indicate the change of power flow of the second branch after open circuit occurs for the first branch, P1Indicate that the first branch is disconnected
Trend before road, D2-1Indicate that target cut-offs the factor.
In the present embodiment, in the case where loop network system itself immobilizes, it is also solid that target, which cut-offs the factor actually,
Fixed constant, therefore, target, which cut-offs the factor, can precalculate and save before real-time analytic process.The one of the present embodiment
In a little embodiments, target cut-offs the factor can be by the first branch, the relevant impedance computation of second branch.Specifically, this reality
Apply example for example and can also include: the branch impedance previously according to the first branch, branch impedance of the second branch, described
The self-impedance matrix of the first branch and the mutual resistance matrix of the first branch and the second branch, calculate the target and open
The disconnected factor；Wherein, the end node of the endpoint node in the mutual resistance matrix including the first branch and the second branch
Mutual impedance between point.It is understood that in the case that the power system network involved in loop network system has determined, institute
State the branch impedance of the first branch, the branch impedance of the second branch, the self-impedance matrix of the first branch and described
The mutual resistance matrix of the first branch and the second branch is determining, such as the meter that can be embedded from Energy Management System
It is directly acquired in point counting analysis software.
Specifically, the calculation that the target cut-offs the factor can be embodied by following equation 2:
Formula 2:
Wherein, D2-1Indicate that target cut-offs the factor, X2-1Indicate the mutual impedance square of the first branch Yu the second branch
Battle array, X1-1Indicate the self-impedance matrix of the first branch, x1Indicate the branch impedance of the first branch, x2Indicate described second
The branch impedance of branch.
It is understood that the method for the present embodiment is directed to during the real-time online that loop network system transmits electric power
For the steady fractograph analysis of heat of the first branch and second branch.Wherein, the first branch can indicate any one in loop network system
The branch of possible generation open circuit, second branch, which can indicate generate in the case where open circuit occurs for the first branch, overloads now
Any one branch.Understand in the sense that more wide in range, the first branch and the second branch can be described
The different branch of any two in loop network system.
In some embodiments of the present embodiment, analyzed at the hot surely calculating of section in the process to simplify real-time online
Reason task, can select in loop network system in advance has the possible branch composition branch trouble set of open circuit, only for branch
The steady section of branch analysis heat in the failure collection of road, reduces the branch for needing to analyze hot steady section in real-time analytic process in this way
Number amount, to analyze the calculation processing task of the steady section of heat during simplifying real-time online.Specifically, S101 it
Before, the present embodiment for example can also include: to choose the first branch and described in pre-set branch trouble set
Two branches；Wherein, the branch in the branch trouble set is the branch that open circuit possible occur.
It is understood that the branch trouble set for example can be what management and running personnel chose and were arranged manually.
S102, according to the current trend of the first branch, the current trend of the second branch, the second branch
Hot steady capacity and the target pre-saved cut-off the factor, calculates the second branch in the case where the first branch is breaking
Currently cut-off the nargin factor, wherein the current goal cut-offs second branch described in nargin factor representation currently described first
The nargin of the steady capacity of trend and heat after changing in the case where branch circuit break.
Specifically, the calculation for currently cut-offfing the nargin factor can specifically be embodied by following equation 3:
Formula 3:
Wherein, E2-1It indicates currently to cut-off the nargin factor, D2-1Indicate that target cut-offs the factor,Indicate the second branch
The steady capacity of heat, P1Indicate the current trend of the first branch, P2Indicate the current trend of the second branch.
It is understood that the target cut-off the factor can be used in analyze the first branch break down tripping after second
The power flow changing situation on road, but the relationship being not directly available between the trend after changing in second branch and the steady capacity of heat.For
This, further calculated in the present embodiment it is described currently cut-off the nargin factor, it is described currently to cut-off the nargin factor and can show that
The nargin of the trend of second branch and the steady capacity of heat after first branch tripping leads to power flow transfer, therefore can be used for analyzing
Whether second branch will appear overload phenomenon in the case where first branch open circuit.
If S103, the current goal cut-off the nargin factor less than margin threshold, the second branch is identified as mesh
Mark branch, wherein the Targeted Tributary expression currently occurs will appear overload phenomenon under open circuit conditions in the loop network system
Branch.
Generally, it is described currently cut-off the nargin factor be negative value in the case where, if the first branch occur tripping open circuit,
The trend of second branch will be more than its steady capacity of heat, the phenomenon that overload.It, can be with it is understood that in varied situations
Different margin thresholds is set, so that the identification of the Targeted Tributary of break, overload can adapt to the requirement under different scenes.
In some embodiments of the present embodiment, the margin threshold is specifically as follows pre-set numerical value.Example
Such as, the margin threshold rule of thumb can be manually set.
In other embodiments of the present embodiment, the margin threshold can be whole according to branch each in loop network system
The nargin factor of currently cut-offfing on body determines.For example, S103 can specifically include: according to sequence from big to small, to the ring
The current nargin factor of each branch in the case where open circuit conditions occur is ranked up in net system；If the current goal nargin factor
Sorting position after preset sorting position, the second branch is identified as Targeted Tributary；Wherein, the nargin thresholding
Value is specially the current nargin factor on the preset sorting position.
It is understood that identify the first branch open circuit in the case where can occur overload phenomenon second branch it
Afterwards, second branch can be made not generate overload phenomenon in the case where first branch open circuit by hot steady control of section.Tool
Body, after S103, the present embodiment for example can also include: the case where the second branch is identified as Targeted Tributary
Under, the factor, the historical trend lower limit value of the first branch, described second are cut-off according to the margin threshold, the target
The current trend of branch calculates the steady control of section value of target heat, wherein the steady control of section value of target heat corresponds to described the
The control requirement of the sum of the trend of one branch and the second branch；By the steady control of section value of target heat, described in adjustment
The trend of the first branch and the second branch.
Specifically, the nargin factor adjusted of cut-offfing is made just to reach margin threshold, then the adjustment mesh of second branch
The adjustment target trend of mark trend and the first branch should meet following equation 4:
Formula 4:
Due to hot steady section be dispatcher run in control process to the trend of the trend of the first branch and second branch it
Therefore control range requirement afterwards is based on above-mentioned formula 4, the steady control of section value of heat should meet following equation 5:
Formula 5:
In order to meet the needs of historical variations, the adjustment target trend of the first branch should choose the historical trend of the first branch
Lower limit, therefore, the steady control of section value of heat can be calculated by following equation 6:
Formula 6:
In above-mentioned formula 4~6, P2Indicate the adjustment target trend of the second branch, P1Indicate the first branch
Adjust target trend, C21Indicate the steady control of section value of heat,E2-1 Indicate margin threshold, D2-1Indicate that target cut-offs the factor,Table
Show the steady capacity of heat of the second branch,P1 Indicate the lower limit of the historical trend of the first branch.
In the present embodiment, need to analyze using in loop network system any two branch of hot steady section as the first branch with
Second branch can precalculate in the case where open circuit occurs in the first branch first branch to the second branch
The trend ratio of transfer simultaneously saves as target and cut-offs the factor, during the real-time online that loop network system transmits electric power, can obtain
The current trend of the first branch and the current trend of second branch and the target pre-saved is taken to cut-off the factor and according to described
It the current trend of the first branch, the current trend of the second branch, the heat of the second branch steady capacity and pre-saves
Target, which cut-offs the factor and calculates the second branch, currently cut-offs the nargin factor in the case where the first branch is breaking, if institute
It states current goal and cut-offs the nargin factor less than margin threshold, the second branch is identified as Targeted Tributary, wherein described to work as
Preceding target cut-offs trend of the second branch described in nargin factor representation currently in the case where the first branch is breaking after variation
With the nargin of hot steady capacity, the Targeted Tributary expression currently occurs will appear overload under open circuit conditions in the loop network system
The branch of phenomenon.It can be seen that due to target cut-off the factor be precalculate and save without during real-time online
It calculates, calculation processing task involved in real-time online process mitigates significantly, and therefore, real-time online is steady to heat in loop network system disconnected
The time that face is analyzed is reduced, so that the analysis of the steady section of heat can follow the Branch Power Flow feelings frequently changed in time
The control of condition, the steady section of heat also can be much sooner.
Example devices
Referring to fig. 2, a kind of structure chart for the device for analyzing the steady section of heat in loop network system in the embodiment of the present invention is shown.
In the present embodiment, described device for example be can specifically include:
First acquisition unit 201, for obtaining the current trend and the current trend of second branch and pre- of the first branch
The target first saved cut-offs the factor, wherein the target cut-offs factor representation in the case where open circuit occurs in the first branch
The trend ratio that the first branch is shifted to the second branch；
First computing unit 202, for the current tide according to the current trend of the first branch, the second branch
Stream, the hot surely capacity of the second branch and the target pre-saved cut-off the factor, calculate the second branch described first
The nargin factor is currently cut-off in the case where branch circuit break, wherein the current goal is cut-off second described in nargin factor representation
The nargin of the branch currently trend in the case where the first branch is breaking after variation and the steady capacity of heat；
Recognition unit 203, if cut-offfing the nargin factor less than margin threshold, by described second for the current goal
Road is identified as Targeted Tributary, wherein the Targeted Tributary expression currently occurs to go out under open circuit conditions in the loop network system
Now overload the branch of phenomenon.
Optionally, in some embodiments of the present embodiment, described device can also include:
Second computing unit, for impedance, the second branch previously according to the first branch impedance, described
The self-impedance matrix of one branch and the mutual resistance matrix of the first branch and the second branch, calculate the target and cut-off
The factor；
Wherein, the end node of the endpoint node in the mutual resistance matrix including the first branch and the second branch
Mutual impedance between point.
Optionally, in other embodiments of the present embodiment, the margin threshold, which is specifically as follows, to be preset
Numerical value.
Optionally, in the other embodiment of the present embodiment, described device can also include:
Selection unit chooses the first branch and second described in pre-set branch trouble set
Road；
Wherein, the branch in the branch trouble set is the branch that open circuit possible occur.
Optionally, in some other embodiments of the present embodiment, the recognition unit may include:
Sorting subunit, for open circuit to occur to each branch in the loop network system according to sequence from big to small
In the case of the current nargin factor be ranked up；
Identify subelement, if the sorting position for the current goal nargin factor after preset sorting position,
The second branch is identified as Targeted Tributary；
Wherein, the margin threshold is specially the current nargin factor on the preset sorting position.
Optionally, in the present embodiment and in some other embodiments, described device can also include:
Third computing unit, in the case where the second branch is identified as Targeted Tributary, according to the nargin
Threshold value, the target cut-off the current trend of the factor, the historical trend lower limit value of the first branch, the second branch,
Calculate the steady control of section value of target heat, wherein the steady control of section value of target heat corresponds to the first branch and described the
The control requirement of the sum of the trend of two branches；
Adjustment unit, for by the steady control of section value of target heat, adjusting the first branch and second described
The trend on road.
In the present embodiment, need to analyze using in loop network system any two branch of hot steady section as the first branch with
Second branch can precalculate in the case where open circuit occurs in the first branch first branch to the second branch
The trend ratio of transfer simultaneously saves as target and cut-offs the factor, during the real-time online that loop network system transmits electric power, can obtain
The current trend of the first branch and the current trend of second branch and the target pre-saved is taken to cut-off the factor and according to described
It the current trend of the first branch, the current trend of the second branch, the heat of the second branch steady capacity and pre-saves
Target, which cut-offs the factor and calculates the second branch, currently cut-offs the nargin factor in the case where the first branch is breaking, if institute
It states current goal and cut-offs the nargin factor less than margin threshold, the second branch is identified as Targeted Tributary, wherein described to work as
Preceding target cut-offs trend of the second branch described in nargin factor representation currently in the case where the first branch is breaking after variation
With the nargin of hot steady capacity, the Targeted Tributary expression currently occurs will appear overload under open circuit conditions in the loop network system
The branch of phenomenon.It can be seen that due to target cut-off the factor be precalculate and save without during real-time online
It calculates, calculation processing task involved in real-time online process mitigates significantly, and therefore, real-time online is steady to heat in loop network system disconnected
The time that face is analyzed is reduced, so that the analysis of the steady section of heat can follow the Branch Power Flow feelings frequently changed in time
The control of condition, the steady section of heat also can be much sooner.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.The terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
For device embodiment, since it corresponds essentially to embodiment of the method, so related place is referring to method reality
Apply the part explanation of example.System embodiment described above is only schematical, wherein described be used as separation unit
The unit of explanation may or may not be physically separated, and component shown as a unit can be or can also be with
It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual
It needs that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not
In the case where making the creative labor, it can understand and implement.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (12)
1. a kind of method of the steady section of heat in analysis loop network system characterized by comprising
It obtains the current trend of the first branch and the current trend of second branch and the target pre-saved cut-offs the factor,
In, the target cut-off factor representation in the case where there is open circuit in the first branch first branch to described second
The trend ratio of road transfer；
According to the steady capacity of heat of the current trend of the first branch, the current trend of the second branch, the second branch
The factor is cut-off with the target pre-saved, calculates current goal of the second branch in the case where the first branch is breaking
Cut-off the nargin factor, wherein the current goal cut-offs second branch described in nargin factor representation currently in the first branch
The nargin of the steady capacity of trend and heat after changing in the case where open circuit；
If the current goal cut-offs the nargin factor less than margin threshold, the second branch is identified as Targeted Tributary,
In, the Targeted Tributary indicates the branch for currently occurring will appear under open circuit conditions overload phenomenon in the loop network system.
2. the method according to claim 1, wherein further include:
Previously according to the branch impedance of the first branch, the branch impedance of the second branch, the resistance certainly of the first branch
The mutual resistance matrix of anti-matrix and the first branch and the second branch calculates the target and cut-offs the factor；
Wherein, in the mutual resistance matrix including the first branch endpoint node and the second branch endpoint node it
Between mutual impedance.
3. the method according to claim 1, wherein further include:
In pre-set branch trouble set, the first branch and the second branch are chosen；
Wherein, the branch in the branch trouble set is the branch that open circuit possible occur.
4. the method according to claim 1, wherein the margin threshold is specially pre-set numerical value.
5. if the method according to claim 1, wherein the current goal cut-offs the nargin factor less than abundant
Threshold value is spent, the second branch is identified as Targeted Tributary, comprising:
According to sequence from big to small, nargin is currently cut-off in the case where open circuit conditions occur to each branch in the loop network system
The factor is ranked up；
If the current goal cut-offs the sorting position of the nargin factor after preset sorting position, the second branch is known
It Wei not Targeted Tributary；
Wherein, the margin threshold is specially currently to cut-off the nargin factor on the preset sorting position.
6. the method according to claim 1, wherein further include:
In the case where the second branch is identified as Targeted Tributary, according to the margin threshold, the target cut-off because
The current trend of the historical trend lower limit value of sub, the described first branch, the second branch calculates the steady control of section of target heat
Value, wherein the steady control of section value of target heat corresponds to the control of the sum of trend of the first branch and the second branch
System requires；
By the steady control of section value of target heat, the trend of the first branch and the second branch is adjusted.
7. the device of the steady section of heat in a kind of analysis loop network system characterized by comprising
First acquisition unit, for obtain the first branch current trend and second branch current trend and pre-save
Target cut-offs the factor, wherein the target cut-offs factor representation in the case where open circuit occurs in the first branch described first
The trend ratio of the transfer of second branch described in Zhi Luxiang；
First computing unit, for according to the current trend of the first branch, the current trend of the second branch, described
The steady capacity of the heat of two branches and the target pre-saved cut-off the factor, calculate the second branch in the first branch open circuit
In the case of current goal cut-off the nargin factor, wherein the current goal cut-offs second branch described in nargin factor representation and works as
The nargin of the preceding steady capacity of trend and heat in the case where the first branch is breaking after variation；
Recognition unit identifies the second branch if cut-offfing the nargin factor less than margin threshold for the current goal
For Targeted Tributary, wherein the Targeted Tributary expression currently occurs will appear overload under open circuit conditions in the loop network system
The branch of phenomenon.
8. device according to claim 7, which is characterized in that further include:
Second computing unit, branch impedance, institute for branch impedance, the second branch previously according to the first branch
The self-impedance matrix of the first branch and the mutual resistance matrix of the first branch and the second branch are stated, the target is calculated
Cut-off the factor；
Wherein, in the mutual resistance matrix including the first branch endpoint node and the second branch endpoint node it
Between mutual impedance.
9. device according to claim 7, which is characterized in that the margin threshold is specially pre-set numerical value.
10. device according to claim 7, which is characterized in that further include:
Selection unit, for choosing the first branch and the second branch in pre-set branch trouble set；
Wherein, the branch in the branch trouble set is the branch that open circuit possible occur.
11. device according to claim 7, which is characterized in that the recognition unit includes:
Sorting subunit, for open circuit conditions to occur to each branch in the loop network system according to sequence from big to small
Under currently cut-off the nargin factor and be ranked up；
Identify subelement, if cut-offfing the sorting position of the nargin factor after preset sorting position for the current goal,
The second branch is identified as Targeted Tributary；
Wherein, the margin threshold is specially currently to cut-off the nargin factor on the preset sorting position.
12. device according to claim 7, which is characterized in that further include:
Third computing unit, in the case where the second branch is identified as Targeted Tributary, according to the nargin thresholding
Value, the target cut-off the current trend of the factor, the historical trend lower limit value of the first branch, the second branch, calculate
The steady control of section value of target heat, wherein the steady control of section value of target heat corresponds to the first branch and second described
The control requirement of the sum of the trend on road；
Adjustment unit, for by the steady control of section value of target heat, adjusting the first branch and the second branch
Trend.
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