CN106451463A - A method and apparatus for analyzing a thermal-stable section in a ring network system - Google Patents
A method and apparatus for analyzing a thermal-stable section in a ring network system Download PDFInfo
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- CN106451463A CN106451463A CN201610996806.XA CN201610996806A CN106451463A CN 106451463 A CN106451463 A CN 106451463A CN 201610996806 A CN201610996806 A CN 201610996806A CN 106451463 A CN106451463 A CN 106451463A
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- branch road
- tie point
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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 method and apparatus for analyzing a thermal-stable section in a ring network system. The method comprises the steps of acquiring power flows of a first branch and a second branch and a pre-saved target breaking-off factor, wherein the target breaking-off factor means the proportion of the power flows transferred from the first branch to the second branch when the first branch is disconnected; calculating a power flow breaking-off margin factor of the second branch in the case of disconnection of the first branch circuit based on the present power flows of the first branch and the second branch, the heat stability capacity of the second branch and the target breaking-off factor, wherein the power flow breaking-off margin factor represents the changed margin of the power flows and thermal stability capacity of the second branch when the first branch is in disconnection; and if the power flow target breaking-ff margin factor is less than a margin threshold value, identifying the second branch as a target branch, wherein the target branch indicates the branch that will appear to be overloaded when an open circuit occurs in the ring network system. In addition, the invention also discloses an apparatus analyzing the thermal-stable section in the ring network system.
Description
Technical field
The present invention relates to technical field of electric power, the method for the steady section of heat and dress in more particularly to a kind of analysis loop network system
Put.
Background technology
In electric power loop network system, generally there is substantial amounts of branch road.If one there is open circuit fault in branch road, on this branch road
Trend before open circuit can be transferred on other branch roads, thus causing the trend on other branch roads to change.And on other branch roads
It is possible to overload phenomenon can be produced after creating power flow changing.In order to avoid propping up of overload occurs in the case of open circuit fault
Road, needs the steady section of heat during the flow situations according to branch road are to loop network system in real time during loop network system transmits electric power
It is analyzed, the branch road of overload will occur in the case of open circuit fault to determine in real time.
Inventor finds through research, during loop network system transmits electric power to loop network system in the steady section of heat reality
When analysis, need longer analysis time, this does not adapt to Branch Power Flow situation frequency during loop network system transmits electric power
The feature of numerous change, thus lead to the steady section of heat analysis do not reach enough analysis efficiencies require, problem not prompt enough.
Content of the invention
The technical problem to be solved is to provide the method for the steady section of heat and dress in a kind of analysis loop network system
Put, to shorten the time that the steady section of heat in real-time loop network system is analyzed so that the analysis of the steady section of heat can and
When follow the Branch Power Flow situation of frequent change, so that the control of the steady section of heat is much sooner.
In a first aspect, for solving above-mentioned technical problem, embodiments providing heat in a kind of analysis loop network system steady
The method of section, including：
The current trend of acquisition tie point and the current trend of the second branch road and the target pre-saving cut-off the factor,
Wherein, described target cut-off factor representation in the case that open circuit in described tie point described tie point to described second
The trend ratio of branch road transfer；
Steady according to the heat of the current trend of described tie point, the current trend of described second branch road, described second branch road
Capacity and the target pre-saving cut-off the factor, calculate described second branch road current in the case of the open circuit of described tie point
Cut-off the nargin factor, wherein, described current goal cut-offs the second branch road described in nargin factor representation currently in described tie point
Trend after changing in the case of open circuit and the nargin of the steady capacity of heat；
If described current goal cut-offs the nargin factor is less than margin threshold, described second branch road is identified as target and props up
Road, wherein, described Targeted Tributary represents currently occur the propping up of overload phenomenon occurs under open circuit conditions in described loop network system
Road.
Optionally, also include：
Previously according to the branch impedance of described tie point, the branch impedance of described second branch road, described tie point
Self-impedance matrix and described tie point and the mutual resistance matrix of described second branch road, calculate described target and cut-off the factor；
Wherein, described mutual resistance matrix includes the endpoint node of described tie point and the end node of described second branch road
Mutual impedance between point.
Optionally, also include：
In the branch trouble set pre-setting, choose described tie point and described second branch road；
Wherein, the branch road in described branch trouble set is the branch road it may happen that open circuit.
Optionally, the numerical value that described margin threshold specially pre-sets.
Optionally, if the described nargin factor of currently cut-offfing is less than margin threshold, described second branch road is identified as
Targeted Tributary, including：
According to order from big to small, currently cut-offfing under open circuit conditions is being occurred to each branch road in described loop network system
The nargin factor is ranked up；
If the sorting position of the described current goal nargin factor is after default sorting position, described second branch road is known
Wei not Targeted Tributary；
Wherein, described margin threshold is specially the current nargin factor on described default sorting position.
Optionally, also include：
In the case that described second branch road is identified as Targeted Tributary, opened according to described margin threshold, described target
The disconnected factor, the historical trend lower limit of described tie point, the current trend of described second branch road, calculate the steady section control of target heat
Value processed, wherein, the hot steady control of section value of described target corresponds to the trend sum of described tie point and described second branch road
Control and require；
By the steady control of section value of described target heat, adjust described tie point and the trend of described second branch road.
Second aspect, for solving above-mentioned technical problem, embodiments provides heat in a kind of analysis loop network system steady
The device of section, including：
First acquisition unit, for obtaining the current trend of tie point and the current trend of the second branch road and protecting in advance
The target deposited cut-offs the factor, and wherein, it is described in the case that open circuit in described tie point that described target cut-offs factor representation
Tie point is to the trend ratio of described second branch road transfer；
First computing unit, for according to the current trend of described tie point, the current trend of described second branch road, institute
State the steady capacity of heat of the second branch road and the target pre-saving cut-offs the factor, calculate described second branch road and break in described tie point
The nargin factor is currently cut-off, wherein, described current goal cut-offs the second branch road described in nargin factor representation and works as in the case of road
Trend after changing in the case of the front open circuit in described tie point and the nargin of the steady capacity of heat；
Recognition unit, if cut-off the nargin factor for described current goal to be less than margin threshold, by described second branch road
It is identified as Targeted Tributary, wherein, described Targeted Tributary represents currently occur occurring under open circuit conditions in described loop network system
The branch road of overload phenomenon.
Optionally, also include：
Second computing unit, for the roadlock previously according to the branch impedance of described tie point, described second branch road
Anti-, the self-impedance matrix of described tie point and described tie point and the mutual resistance matrix of described second branch road, calculate institute
State target and cut-off the factor；
Wherein, described mutual resistance matrix includes the endpoint node of described tie point and the end node of described second branch road
Mutual impedance between point.
Optionally, the numerical value that described margin threshold specially pre-sets.
Optionally, also include：
Choose unit, for, in the branch trouble set pre-setting, choosing described tie point and described second
Road；
Wherein, the branch road in described branch trouble set is the branch road it may happen that open circuit.
Optionally, described recognition unit includes：
, for according to order from big to small, there is open circuit to each branch road in described loop network system in sequence subelement
In the case of the nargin factor of currently cut-offfing be ranked up；
Identification subelement, if for the described current goal nargin factor sorting position after default sorting position,
Described second branch road is identified as Targeted Tributary；
Wherein, described margin threshold is specially the current nargin factor on described default sorting position.
Optionally, also include：
3rd computing unit, in the case of being identified as Targeted Tributary in described second branch road, according to described nargin
Threshold value, described target cut-off the factor, the historical trend lower limit of described tie point, the current trend of described second branch road,
Calculate the steady control of section value of target heat, wherein, the steady control of section value of described target heat corresponds to described tie point and described the
The control of the trend sum of two branch roads requires；
Adjustment unit, for by the steady control of section value of described target heat, adjusting described tie point and described second
The trend on road.：
Compared with prior art, the embodiment of the present invention has advantages below：
The method and apparatus being provided according to embodiment of the present invention, to need in loop network system to analyze any of the steady section of heat
Two branch roads, as tie point and the second branch road, can precalculate described in the case that open circuit in described tie point
Tie point to the trend ratio of described second branch road transfer and saves as target and cut-offs the factor, transmits electric power in loop network system
During real-time online, the current trend of tie point and the current trend of the second branch road and the mesh pre-saving can be obtained
Mark cut-offs the factor the current trend according to described tie point, the current trend of described second branch road, described second branch road
The steady capacity of heat and the target pre-saving are cut-off the factor and are calculated described second branch road in the case of the open circuit of described tie point
Currently cut-off the nargin factor, if described current goal cut-offs the nargin factor is less than margin threshold, by described second branch road identification
For Targeted Tributary, wherein, described current goal cut-offs the second branch road described in nargin factor representation and currently breaks in described tie point
Trend after changing in the case of road and the nargin of the steady capacity of heat, described Targeted Tributary represents currently to go out in described loop network system
The branch road of overload phenomenon occurs under existing open circuit conditions.As can be seen here, cut-off the factor due to target to precalculate and preserve
Calculate without during real-time online, the calculating process task involved by real-time online process mitigates, therefore, in real time significantly
The time that online section steady to heat in loop network system is analyzed is reduced, thus the analysis of the steady section of heat can in time with
With the Branch Power Flow situation of frequent change, the control of the steady section of heat also can be much sooner.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments described in invention, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the method for the steady section of heat in a kind of analysis loop network system in the embodiment of the present invention；
Fig. 2 is the structural representation of the device of the steady section of heat in a kind of analysis loop network system in the embodiment of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention it is clear that described embodiment is only this
Invent a part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art exist
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Applicant finds through research, in 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 can not rely on the calculating of all cut-set mode, because
This, during real-time online each time to loop network system in the steady section of heat analysis be required for being related to substantial amounts of calculate to process appoint
Business, which results in and need longer analysis time.But, during real-time online, Branch Power Flow situation frequently changes, this
It is accomplished by continually analyzing the steady section of heat in loop network system, and in the case that analysis time is longer, the analysis of the steady section of heat is just
Do not reach enough analysis efficiencies to require, therefore result in the on-line analysis of the steady section of heat problem not prompt enough.
In order to solve the above problems, in embodiments of the present invention, to need in loop network system to analyze any of the steady section of heat
Two branch roads, as tie point and the second branch road, can precalculate described in the case that open circuit in described tie point
Tie point to the trend ratio of described second branch road transfer and saves as target and cut-offs the factor, transmits electric power in loop network system
During real-time online, the current trend of tie point and the current trend of the second branch road and the mesh pre-saving can be obtained
Mark cut-offs the factor the current trend according to described tie point, the current trend of described second branch road, described second branch road
The steady capacity of heat and the target pre-saving are cut-off the factor and are calculated described second branch road in the case of the open circuit of described tie point
Currently cut-off the nargin factor, if described current goal cut-offs the nargin factor is less than margin threshold, by described second branch road identification
For Targeted Tributary, wherein, described current goal cut-offs the second branch road described in nargin factor representation and currently breaks in described tie point
Trend after changing in the case of road and the nargin of the steady capacity of heat, described Targeted Tributary represents currently to go out in described loop network system
The branch road of overload phenomenon occurs under existing open circuit conditions.As can be seen here, cut-off the factor due to target to precalculate and preserve
Calculate without during real-time online, the calculating process task involved by real-time online process mitigates, therefore, in real time significantly
The time that online section steady to heat in loop network system is analyzed is reduced, thus the analysis of the steady section of heat can in time with
With the Branch Power Flow situation of frequent change, the control of the steady section of heat also can be much sooner.
Below in conjunction with the accompanying drawings, the various non-limiting embodiment of the present invention are described in detail.
Illustrative methods
Referring to Fig. 1, the flow chart showing the method for the steady section of heat in a kind of analysis loop network system in the embodiment of the present invention.
In the present embodiment, methods described for example specifically may comprise steps of：
S101, the current trend obtaining tie point and the current trend of the second branch road and the target pre-saving are cut-off
The factor, wherein, described target cut-off factor representation described tie point occur open circuit in the case of described tie point to institute
State the trend ratio of the second branch road transfer.
During real-time online, the trend of the trend of described tie point and described second branch road may constantly occur
Change.Therefore, described the will be obtained when being directed to every time described tie point and described second branch road carries out the steady fractograph analysis of heat
Current trend under current time for the current trend and described second branch road under current time for one branch road.Specifically, institute
The current trend stating tie point refers to effective power flow under current time for the described tie point, the working as of described second branch road
Front trend refers to effective power flow under current time for described second branch road.
It should be noted that for the calculating process task analyzing the steady section of heat during simplifying real-time online, looped network system
Need for on-line analysis in system, cut-offfing the factor with described tie point and the corresponding target of described second branch road can be
Precalculate and preserve.Wherein, described target cut-offs the trend change that the factor can reflect the second branch road after tie point open circuit
Change, specifically, described target is cut-off the factor and can be represented that described target is cut-off factor representation and open circuit in described tie point
In the case of described tie point to described second branch road transfer trend ratio, that is, described target cut-offs the factor can lead to
Cross equation 1 below to embody：
Formula 1：
Wherein,Represent the change of power flow of the second branch road after tie point occurs open circuit, P1Represent that tie point is broken
Trend before road, D2-1Represent that target cut-offs the factor.
In the present embodiment, in the case that loop network system immobilizes in itself, it is also actually solid that target cut-offs the factor
Fixed constant, therefore, target is cut-off the factor and can be precalculated before real-time analysis process and preserve.In the present embodiment one
In a little embodiments, target cut-offs the factor can be by the related impedance computation of tie point, the second branch road.Specifically, this reality
Apply example for example can also include：Previously according to the branch impedance of the described tie point, branch impedance of described second branch road, described
The self-impedance matrix of tie point and described tie point and the mutual resistance matrix of described second branch road, calculate described target and open
The disconnected factor；Wherein, described mutual resistance matrix includes the endpoint node of described tie point and the end node of described second branch road
Mutual impedance between point.It is understood that in the case that the power system network involved by loop network system has determined, institute
State the branch impedance of tie point, the branch impedance of described second branch road, the self-impedance matrix of described tie point and described
The mutual resistance matrix of tie point and described second branch road is all to determine, the meter that for example can embed from EMS
Calculate direct access in analysis software.
Specifically, described target is cut-off the calculation of the factor and can be embodied by equation 2 below：
Formula 2：
Wherein, D2-1Represent that target cut-offs the factor, X2-1Represent the mutual impedance square of described tie point and described second branch road
Battle array, X1-1Represent the self-impedance matrix of described tie point, x1Represent the branch impedance of described tie point, x2Represent described second
The branch impedance of branch road.
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
The steady fractograph analysis of heat for tie point and the second branch road.Wherein, tie point can represent any one in loop network system
It may happen that the branch road of open circuit, the second branch road can represent that may to produce overload in the case that tie point occurs open circuit existing
Any one branch road.Understand in the sense that more wide in range, described tie point and described second branch road can be described
The different branch road of any two in loop network system.
In some embodiments of the present embodiment, in order to analyze during simplifying real-time online at the calculating of the steady section of heat
Reason task, can select in loop network system in advance and have open circuit possible branch road composition branch trouble set, only for
The steady section of branch road analysis heat in the failure collection of road, which reduces and needs to analyze propping up of the steady section of heat during analyzing in real time
Way amount, thus analyze the calculating process task of the steady section of heat during simplifying real-time online.Specifically, S101 it
Before, the present embodiment for example can also include：In the branch trouble set pre-setting, choose described tie point and described the
Two branch roads；Wherein, the branch road in described branch trouble set is the branch road it may happen that open circuit.
It is understood that described branch trouble set for example management and running personnel can be chosen and arrange manually.
S102, the current trend according to described tie point, the current trend of described second branch road, described second branch road
The steady capacity of heat and the target pre-saving cut-off the factor, calculate described second branch road in the case of the open circuit of described tie point
Currently cut-off the nargin factor, wherein, described current goal cut-offs the second branch road described in nargin factor representation currently described first
Trend after changing in the case of branch circuit break and the nargin of the steady capacity of heat.
Specifically, the described calculation currently cut-offfing the nargin factor specifically can be embodied by equation 3 below：
Formula 3：
Wherein, E2-1Represent and currently cut-off the nargin factor, D2-1Represent that target cut-offs the factor,Represent described second branch road
The steady capacity of heat, P1Represent the current trend of described tie point, P2Represent the current trend of described second branch road.
It is understood that described target cut-off the factor can be used in analyze tie point break down tripping operation latter second
The power flow changing situation on road, but it is not directly available the relation between the trend after change on the second branch road and the steady capacity of heat.For
This, calculate further in the present embodiment described currently cut-off the nargin factor, the described nargin factor of currently cut-offfing can show that
After tie point tripping operation leads to power flow transfer, the trend of the second branch road and the nargin of the steady capacity of heat, therefore can be used for analyzing
In the case of tie point open circuit, whether the second branch road occurs overload phenomenon.
If the described current goal of S103 cut-offs the nargin factor is less than margin threshold, described second branch road is identified as mesh
Mark branch road, wherein, described Targeted Tributary represents currently occur occurring overload phenomenon in described loop network system under open circuit conditions
Branch road.
Usually, described currently cut-off the nargin factor be negative value in the case of, if tie point occur tripping operation open circuit,
The trend of the second branch road will exceed the steady capacity of its heat, the phenomenon of overload.It is understood that in varied situations, permissible
Different margin threshold are 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, described margin threshold is specifically as follows the numerical value pre-setting.Example
As rule of thumb can manually arranged described margin threshold.
In other embodiments of the present embodiment, described margin threshold can be whole according to branch road each in loop network system
The nargin factor of currently cut-offfing on body determines.For example, S103 specifically can include：According to order from big to small, to described ring
In net system, the current nargin factor under there are open circuit conditions for each branch road is ranked up；If the described current goal nargin factor
Sorting position after default sorting position, described second branch road is identified as Targeted Tributary；Wherein, described nargin thresholding
Value is specially the current nargin factor on described default sorting position.
It is understood that identify tie point open circuit in the case of can occur transship phenomenon the second branch road it
Afterwards, the second branch road can be made will not to produce overload phenomenon in the case of tie point open circuit by the steady control of section of heat.Tool
Body ground, after S103, the present embodiment for example can also include：It is identified as the situation of Targeted Tributary in described second branch road
Under, according to described margin threshold, described target cut-off the factor, the historical trend lower limit of described tie point, described second
The current trend of branch road, calculates the steady control of section value of target heat, and wherein, the steady control of section value of described target heat corresponds to described the
The control of the trend sum of one branch road and described second branch road requires；By the steady control of section value of described target heat, adjustment is described
Tie point and the trend of described second branch road.
Specifically, the nargin factor of cut-offfing after adjustment to be made just reaches margin threshold, then the adjustment mesh of the second branch road
Mark trend should meet equation 4 below with the adjustment target trend of tie point：
Formula 4：
Due to the steady section of heat be dispatcher run in control process to the trend of the trend of tie point and the second branch road it
Span of control afterwards requires, and therefore, based on above-mentioned formula 4, the steady control of section value of heat should meet equation 5 below：
Formula 5：
In order to meet the needs of historical variations, the adjustment target trend of tie point should choose the historical trend of tie point
Lower limit, therefore, the steady control of section value of heat can be calculated by equation 6 below：
Formula 6：
In above-mentioned formula 4～6, P2Represent the adjustment target trend of described second branch road, P1Represent described tie point
Adjustment target trend, C21Represent the steady control of section value of heat,E 2-1 Represent margin threshold, D2-1Represent that target cut-offs the factor,Table
Show the steady capacity of heat of described second branch road,P 1 Represent the lower limit of the historical trend of described tie point.
In the present embodiment, need to analyze using in loop network system any two branch road of the steady section of heat as tie point and
Second branch road, can precalculate described tie point occur open circuit in the case of described tie point to described second branch road
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 tie point and the current trend of the second branch road and the target pre-saving is taken to cut-off the factor and according to described
The current trend of tie point, the current trend of described second branch road, the steady capacity of heat of described second branch road and pre-save
Target cut-off the factor calculate described second branch road described tie point open circuit in the case of currently cut-off the nargin factor, if institute
State current goal cut-off the nargin factor be less than margin threshold, described second branch road is identified as Targeted Tributary, wherein, described work as
Front target cut-offs the trend after the second branch road described in nargin factor representation currently changes in the case of the open circuit of described tie point
With the nargin of the steady capacity of heat, described Targeted Tributary represents currently occur overload occurring under open circuit conditions in described loop network system
The branch road of phenomenon.As can be seen here, cut-offfing the factor due to target is to precalculate and preserve without during real-time online
Calculate, the calculating process task involved by real-time online process mitigates significantly, and therefore, real-time online surely breaks to heat in loop network system
The time that face is analyzed is reduced, thus the analysis of the steady section of heat can follow the Branch Power Flow feelings of frequent change in time
Condition, the control of the steady section of heat also can be much sooner.
Example devices
Referring to Fig. 2, show the structure chart of the device of the steady section of heat in a kind of analysis loop network system in the embodiment of the present invention.
In the present embodiment, described device for example specifically can include：
First acquisition unit 201, for obtaining the current trend of tie point and the current trend of the second branch road and pre-
The target first preserving cut-offs the factor, and wherein, described target cut-offs factor representation in the case that open circuit in described tie point
Described tie point is to the trend ratio of described second branch road transfer；
First computing unit 202, for the current tide according to the current trend of described tie point, described second branch road
Stream, the steady capacity of heat of described second branch road and the target pre-saving cut-off the factor, calculate described second branch road described first
The nargin factor is currently cut-off, wherein, described current goal cut-offs second described in nargin factor representation in the case of branch circuit break
Branch road currently change in the case of the open circuit of described tie point after trend and the steady capacity of heat nargin；
Recognition unit 203, if cut-off the nargin factor for described current goal to be less than margin threshold, by described second
Road is identified as Targeted Tributary, and wherein, described Targeted Tributary represents currently occur going out under open circuit conditions in described loop network system
Now transship the branch road of phenomenon.
Optionally, in some embodiments of the present embodiment, described device can also include：
Second computing unit, for previously according to the impedance of described tie point, the impedance of described second branch road, described
The self-impedance matrix of one branch road and described tie point and the mutual resistance matrix of described second branch road, calculate described target and cut-off
The factor；
Wherein, described mutual resistance matrix includes the endpoint node of described tie point and the end node of described second branch road
Mutual impedance between point.
Optionally, in other embodiments of the present embodiment, described margin threshold is specifically as follows and pre-sets
Numerical value.
Optionally, in the other embodiment of the present embodiment, described device can also include：
Choose unit, for, in the branch trouble set pre-setting, choosing described tie point and described second
Road；
Wherein, the branch road in described branch trouble set is the branch road it may happen that open circuit.
Optionally, in some other embodiments of the present embodiment, described recognition unit can include：
, for according to order from big to small, there is open circuit to each branch road in described loop network system in sequence subelement
In the case of the current nargin factor be ranked up；
Identification subelement, if for the described current goal nargin factor sorting position after default sorting position,
Described second branch road is identified as Targeted Tributary；
Wherein, described margin threshold is specially the current nargin factor on described default sorting position.
Optionally, in the present embodiment and in some other embodiments, described device can also include：
3rd computing unit, in the case of being identified as Targeted Tributary in described second branch road, according to described nargin
Threshold value, described target cut-off the factor, the historical trend lower limit of described tie point, the current trend of described second branch road,
Calculate the steady control of section value of target heat, wherein, the steady control of section value of described target heat corresponds to described tie point and described the
The control of the trend sum of two branch roads requires；
Adjustment unit, for by the steady control of section value of described target heat, adjusting described tie point and described second
The trend on road.
In the present embodiment, need to analyze using in loop network system any two branch road of the steady section of heat as tie point and
Second branch road, can precalculate described tie point occur open circuit in the case of described tie point to described second branch road
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 tie point and the current trend of the second branch road and the target pre-saving is taken to cut-off the factor and according to described
The current trend of tie point, the current trend of described second branch road, the steady capacity of heat of described second branch road and pre-save
Target cut-off the factor calculate described second branch road described tie point open circuit in the case of currently cut-off the nargin factor, if institute
State current goal cut-off the nargin factor be less than margin threshold, described second branch road is identified as Targeted Tributary, wherein, described work as
Front target cut-offs the trend after the second branch road described in nargin factor representation currently changes in the case of the open circuit of described tie point
With the nargin of the steady capacity of heat, described Targeted Tributary represents currently occur overload occurring under open circuit conditions in described loop network system
The branch road of phenomenon.As can be seen here, cut-offfing the factor due to target is to precalculate and preserve without during real-time online
Calculate, the calculating process task involved by real-time online process mitigates significantly, and therefore, real-time online surely breaks to heat in loop network system
The time that face is analyzed is reduced, thus the analysis of the steady section of heat can follow the Branch Power Flow feelings of frequent change in time
Condition, the control of the steady section of heat also can be much sooner.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or deposit between operating
In any this actual relation or order.Term " inclusion ", "comprising" or its any other variant are intended to non-row
The comprising of his property, so that including a series of process of key elements, method, article or equipment not only include those key elements, and
And also include other key elements of being not expressly set out, or also include intrinsic for this process, method, article or equipment institute
Key element.In the absence of more restrictions, the key element being limited by sentence "including a ..." is it is not excluded that including institute
Also there is other identical element in process, method, article or the equipment of stating key element.
For device embodiment, because it corresponds essentially to embodiment of the method, thus real referring to method in place of correlation
The part applying example illustrates.System embodiment described above is only schematically, wherein said as separating component
The unit illustrating can be or may not be physically separate, as the part that unit shows can be or can also
It is not physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to actual
Need to select the purpose to realize this embodiment scheme for some or all of module therein.Those of ordinary skill in the art are not
In the case of paying creative work, you can to understand and to implement.
The above is only the specific embodiment of the application it is noted that ordinary skill people for the art
For member, on the premise of without departing from the application principle, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (12)
1. a kind of method analyzing the steady section of heat in loop network system is it is characterised in that include：
The current trend of acquisition tie point and the current trend of the second branch road and the target pre-saving cut-off the factor, its
In, described target cut-off factor representation described tie point occur open circuit in the case of described tie point to described second
The trend ratio of road transfer；
According to the current trend of described tie point, the current trend of described second branch road, described second branch road the steady capacity of heat
Cut-off the factor with the target pre-saving, calculate described second branch road currently cut-offfing in the case of the open circuit of described tie point
The nargin factor, wherein, described current goal cut-offs the second branch road described in nargin factor representation currently in the open circuit of described tie point
In the case of change after trend and the steady capacity of heat nargin；
If described current goal cut-offs the nargin factor is less than margin threshold, described second branch road is identified as Targeted Tributary, its
In, described Targeted Tributary represents the branch road currently occurring overload phenomenon occurs under open circuit conditions in described loop network system.
2. method according to claim 1 is it is characterised in that also include：
Previously according to the branch impedance of described tie point, the branch impedance of described second branch road, described tie point from hinder
Anti- matrix and described tie point and the mutual resistance matrix of described second branch road, calculate described target and cut-off the factor；
Wherein, described mutual resistance matrix include the endpoint node of described tie point and described second branch road endpoint node it
Between mutual impedance.
3. method according to claim 1 is it is characterised in that also include：
In the branch trouble set pre-setting, choose described tie point and described second branch road；
Wherein, the branch road in described branch trouble set is the branch road it may happen that open circuit.
4. method according to claim 1 is it is characterised in that the numerical value that specially pre-sets of described margin threshold.
If 5. method according to claim 1 is it is characterised in that the described nargin factor of currently cut-offfing is less than nargin door
Limit value, described second branch road is identified as Targeted Tributary, including：
According to order from big to small, each branch road in described loop network system is being occurred currently to cut-off nargin under open circuit conditions
The factor is ranked up；
If the sorting position of the described current goal nargin factor, after default sorting position, described second branch road is identified as
Targeted Tributary；
Wherein, described margin threshold is specially the current nargin factor on described default sorting position.
6. method according to claim 1 is it is characterised in that also include：
In the case that described second branch road is identified as Targeted Tributary, according to described margin threshold, described target cut-off because
The historical trend lower limit of sub, described tie point, the current trend of described second branch road, calculate the steady control of section of target heat
Value, wherein, the hot steady control of section value of described target corresponds to the control of the trend sum of described tie point and described second branch road
System requires；
By the steady control of section value of described target heat, adjust described tie point and the trend of described second branch road.
7. a kind of device analyzing the steady section of heat in loop network system is it is characterised in that include：
First acquisition unit, for obtaining the current trend of tie point and the current trend of the second branch road and pre-saving
Target cut-offs the factor, and wherein, described target cut-offs factor representation described first in the case that open circuit in described tie point
The trend ratio of the second branch road transfer described in Zhi Luxiang；
First computing unit, for according to the current trend of described tie point, the current trend of described second branch road, described
The steady capacity of heat of two branch roads and the target pre-saving cut-off the factor, calculate described second branch road in the open circuit of described tie point
In the case of currently cut-off the nargin factor, wherein, described current goal cut-offs the second branch road described in nargin factor representation and currently exists
Trend after changing in the case of described tie point open circuit and the nargin of the steady capacity of heat；
Recognition unit, if cut-offfing the nargin factor for described current goal to be less than margin threshold, by described second branch road identification
For Targeted Tributary, wherein, described Targeted Tributary represents currently occur overload occurring under open circuit conditions in described loop network system
The branch road of phenomenon.
8. device according to claim 7 is it is characterised in that also include：
Second computing unit, for previously according to the branch impedance of described tie point, the branch impedance of described second branch road, institute
State self-impedance matrix and described tie point and the mutual resistance matrix of described second branch road of tie point, calculate described target
Cut-off the factor；
Wherein, described mutual resistance matrix include the endpoint node of described tie point and described second branch road endpoint node it
Between mutual impedance.
9. device according to claim 7 is it is characterised in that the numerical value that specially pre-sets of described margin threshold.
10. device according to claim 7 is it is characterised in that also include：
Choose unit, for, in the branch trouble set pre-setting, choosing described tie point and described second branch road；
Wherein, the branch road in described branch trouble set is the branch road it may happen that open circuit.
11. devices according to claim 7 are it is characterised in that described recognition unit includes：
, for according to order from big to small, there are open circuit conditions to each branch road in described loop network system in sequence subelement
Under the nargin factor of currently cut-offfing be ranked up；
Identification subelement, if for the described current goal nargin factor sorting position after default sorting position, by institute
State the second branch road and be identified as Targeted Tributary；
Wherein, described margin threshold is specially the current nargin factor on described default sorting position.
12. devices according to claim 7 are it is characterised in that also include：
3rd computing unit, in the case of being identified as Targeted Tributary in described second branch road, according to described nargin thresholding
Value, described target cut-off the factor, the historical trend lower limit of described tie point, the current trend of described second branch road, calculate
The steady control of section value of target heat, wherein, surely control of section value corresponds to described tie point and described second to described target heat
The control of the trend sum on road requires；
Adjustment unit, for by the steady control of section value of described target heat, adjusting described tie point and described second branch road
Trend.
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