CN110120669A - Limit rack method of adjustment, device and the terminal device of grid short circuit electric current - Google Patents
Limit rack method of adjustment, device and the terminal device of grid short circuit electric current Download PDFInfo
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- CN110120669A CN110120669A CN201910356619.9A CN201910356619A CN110120669A CN 110120669 A CN110120669 A CN 110120669A CN 201910356619 A CN201910356619 A CN 201910356619A CN 110120669 A CN110120669 A CN 110120669A
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The present invention is suitable for technical field of power systems, provides a kind of rack method of adjustment, device and terminal device for limiting grid short circuit electric current, which comprises calculates network electric power data of the initial network under normal operating mode；According to network electric power data, the feasible rack Adjusted Option for meeting limiting short-circuit current requirement is obtained, and according to network calculation of tidal current and feasible rack Adjusted Option, establishes rack Adjusted Option analysis model；Then consider the effect for being mounted on flow controller in the critical circuits of initial network, establish the combined optimization model of flow controller Yu rack Adjusted Option；Power flowcontrol amount optimal solution is calculated, and rack adjustment is carried out to initial network according to power flowcontrol amount optimal solution.The rack Adjusted Option that the present invention selects considers the power flowcontrol effect of flow controller, improves the static security of rack Adjusted Option, to realize the short circuit current of network and taking into account for static security on the basis of meeting short circuit current requirement.
Description
Technical field
The invention belongs to technical field of power systems more particularly to a kind of rack adjustment sides for limiting grid short circuit electric current
Method, device and terminal device.
Background technique
With the rapid development of the national economy, electric load and load density constantly increase, the growth of load needs power supply
The capacity in the continuous investment of project, single machine and power plant, substation is continuously increased, and results in the short circuit current water in power grids at different levels
It is flat to be continuously increased, become modern power systems and runs one of the main problem faced.Especially in recent years, planning online source development
Coordinate difficulty to increase, short circuit current problem more highlights, and traditional short circuit current control measure have been difficult to cope with.
In the case where current electrical equipment technology is difficult to make a breakthrough, cut-offs part transmission line of electricity and carry out rack
Adjustment, is the important means of limiting short-circuit current.However rack adjustment can change the trend distribution of network, influence the safety of system
Stability, the two are mutually restricted and be cannot be considered in terms of.
Summary of the invention
In view of this, the embodiment of the invention provides it is a kind of limit the rack method of adjustment of grid short circuit electric current, device and
Terminal device, to solve the problems, such as that the short circuit current and security and stability of system in the prior art cannot be considered in terms of.
The first aspect of the embodiment of the present invention provides a kind of rack method of adjustment for limiting grid short circuit electric current, comprising:
Network electric power data of the initial network under normal operating mode are calculated, the network electric power data include network tide
Stream calculation result and short circuit current；
According to the network electric power data, obtains and meet the rack adjustment that the short circuit current for limiting the initial network requires
Feasible rack Adjusted Option of the scheme as the initial network, and according to the network calculation of tidal current and the feasible net
Frame Adjusted Option establishes rack Adjusted Option analysis model；
According to the effect of the rack Adjusted Option analysis model and flow controller, combined optimization model is established；
According to the combined optimization model, power flowcontrol amount optimal solution is calculated, and according to the power flowcontrol amount optimal solution
Rack adjustment is carried out to the initial network.
The second aspect of the embodiment of the present invention provides a kind of rack adjustment device for limiting grid short circuit electric current, comprising:
Network electric power data computation module, for calculating network electric power data of the initial network under normal operating mode,
The network electric power data include network calculation of tidal current and short circuit current；
Rack Adjusted Option analysis model establishes module, for obtaining and meeting limitation net according to the network electric power data
Feasible rack Adjusted Option of the rack Adjusted Option that network short circuit current requires as the initial network, and according to the network
Calculation of tidal current and the feasible rack Adjusted Option, establish rack Adjusted Option analysis model；
Combined optimization model building module, for the work according to the rack Adjusted Option analysis model and flow controller
With establishing combined optimization model；
Rack adjusts module, for calculating power flowcontrol amount optimal solution according to the combined optimization model, and according to described
Power flowcontrol amount optimal solution carries out rack adjustment to the initial network.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory, processor and is stored in
In the memory and the computer program that can run on the processor, when the processor executes the computer program
The step of realizing the rack method of adjustment of limitation grid short circuit electric current as described above.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and limitation grid short circuit electric current as described above is realized when the computer program is executed by processor
Rack method of adjustment the step of.
Existing beneficial effect is the embodiment of the present invention compared with prior art: the embodiment of the present invention calculates original net first
Network electric power data of the network under normal operating mode obtain and meet the rack that the short circuit current for limiting the initial network requires
Feasible rack Adjusted Option of the Adjusted Option as the initial network, and according to the network calculation of tidal current and it is described can
Row rack Adjusted Option establishes rack Adjusted Option analysis model；Then according to the rack Adjusted Option analysis model and tide
Combined optimization model is established in the effect of stream controller；Finally according to the combined optimization model, it is optimal to calculate power flowcontrol amount
Solution, and rack adjustment is carried out to the initial network according to the power flowcontrol amount optimal solution.The net of selection of the embodiment of the present invention
Frame Adjusted Option considers the power flowcontrol effect of flow controller, improves rack tune on the basis of meeting short circuit current requirement
The static security of perfect square case, to realize the short circuit current of network and taking into account for static security.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the flow diagram of the rack method of adjustment of limitation grid short circuit electric current provided in an embodiment of the present invention；
Fig. 2 is the implementation process schematic diagram of S102 in Fig. 1 provided in an embodiment of the present invention；
Fig. 3 is the implementation process schematic diagram of S202 in Fig. 2 provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the rack adjustment device of limitation grid short circuit electric current provided in an embodiment of the present invention
Fig. 5 is the schematic diagram of terminal device provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
Description and claims of this specification and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Embodiment 1:
Fig. 1 shows the realization stream of the rack method of adjustment of limitation grid short circuit electric current provided by one embodiment of the invention
Cheng Tu, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
As shown in Figure 1, a kind of rack method of adjustment for limiting grid short circuit electric current, packet provided by the embodiment of the present invention
It includes:
S101: calculating network electric power data of the initial network under normal operating mode, and the network electric power data include
Network calculation of tidal current and short circuit current.
In the present embodiment, initial network includes a plurality of route cut-off, initial network all routes just
Often when operation, the steady-state load flow data of power transmission network, the original parts data such as generator, bus and route are loaded, and carry out trend meter
It calculates, obtains network calculation of tidal current, impedance matrix and short circuit current.
S102: it according to the short circuit current, obtains and meets the rack tune that the short circuit current for limiting the initial network requires
Feasible rack Adjusted Option of the perfect square case as the initial network, and according to the network calculation of tidal current and described feasible
Rack Adjusted Option establishes rack Adjusted Option analysis model.
In the present embodiment, it is required according to the limitation of short circuit current, finds out all satisfactions using full scheme searching method and limit
Desired feasible rack Adjusted Option is flowed, rack Adjusted Option is the switching state for designing each route of initial network, specifically,
The lookup method of feasible rack Adjusted Option can be with are as follows:
1) the initial excision route number k of setting and maximum excision route number kmax；
2) k- self-impedance of each node to be checked after cutting off k route is calculated, wherein according to transmission line of electricity component data
Determine that the node to be checked of current transmission line of electricity, node to be checked can be according to impedance matrix of the initial network under normal operating mode
It determines, can also be determined by short circuit current of the initial network under normal operating mode；
3) k line qualification scheme and the unqualified scheme of k line are determined according to the k- self-impedance of each node to be checked, specifically, if
The k- self-impedance of a certain all nodes to be checked of rack Adjusted Option is all larger than preset threshold, then is added to this rack Adjusted Option
K line qualification scheme, if there are the k- self-impedances of node to be checked to be not more than preset threshold in a certain rack Adjusted Option, by this net
Frame Adjusted Option is added to the unqualified scheme of k line；
4) the initial excision number k to k+d is increased according to preset step-length d；
If 5) k+d≤kmax, then using the node in the unqualified scheme of k line as node to be checked, and return to execution and calculate each
Node to be checked is the step of cutting off the k- self-impedance after k route；
If 6) k+d > kmaxOr current node collection to be checked is sky, it is determined that current line switching assembled scheme, which is established, to be completed, and is obtained
To rack Adjusted Option.
In the present embodiment, all rack adjustment sides for meeting short circuit current requirement can be picked out by the above method
Case, feasible rack Adjusted Option SL=[0,1 ..., 1,0]T,SLFor b dimensional vector, i.e., there are b routes for initial network.
S103: according to the effect of the rack Adjusted Option analysis model and flow controller, combined optimization model is established.
In the present embodiment, the critical circuits of initial network are the default route selected according to expertise, power flowcontrol
Device is mounted on critical circuits, for controlling the line transmission power of critical circuits.
S104: according to the combined optimization model, power flowcontrol amount optimal solution is calculated, and most according to the power flowcontrol amount
Excellent solution carries out rack adjustment to the initial network.
In the present embodiment, according to combined optimization model, power flowcontrol amount optimal solution, power flowcontrol amount can be calculated
The as line transmission power of critical circuits, the control strategy of flow controller are exactly the line transmission function controlled on critical circuits
Rate reaches given value Pref, in the case where getting power flowcontrol amount optimal solution, which is applied to flow controller
In, and rack adjustment is carried out according to power flowcontrol amount optimal solution.
From above-described embodiment it is found that the embodiment of the present invention calculates network electricity of the initial network under normal operating mode first
Force data；According to the network electric power data, obtains and meet the rack adjustment that the short circuit current for limiting the initial network requires
Feasible rack Adjusted Option of the scheme as the initial network, and according to the network calculation of tidal current and the feasible net
Frame Adjusted Option establishes rack Adjusted Option analysis model；Then according to the rack Adjusted Option analysis model and trend control
Combined optimization model is established in the effect of device processed；Finally according to the combined optimization model, power flowcontrol amount optimal solution is calculated, and
Rack adjustment is carried out to the initial network according to the power flowcontrol amount optimal solution.The rack adjustment of selection of the embodiment of the present invention
Scheme considers the power flowcontrol effect of flow controller, improves rack Adjusted Option on the basis of meeting short circuit current requirement
Static security, to realize the short circuit current of network and taking into account for static security.
As shown in Fig. 2, in one embodiment of the invention, initial network is carried in the feasible rack Adjusted Option,
The initial network includes cut-offfing route, and the network electric power data further include impedance matrix, and Fig. 2 shows S102 in Fig. 1
Specific implementation flow comprising:
S201: according to the feasible rack Adjusted Option, design it is equivalent cut-off route, and by it is described it is equivalent cut-off route and
For the initial network as composite network, the equivalent route that cut-offs is to distinguish at associated two nodes of route in described cut-off
Inject equal in magnitude, the route of the opposite power of symbol.
In the present embodiment, the opposite function of symbol equal in magnitude is injected separately at associated two nodes of route cut-offfing
Rate cut-offs route as equivalent, meanwhile, to operating normally, to be also injected separately into symbol equal in magnitude at the associated node of route opposite
Power, as equivalent regular link, only, the transimission power of equivalent regular link is 0, and the equivalent injection function for cut-offfing route
Rate is Pb,S, it is b dimensional vector.
S202: according to the network calculation of tidal current, the active power of the composite network transmission is obtained.
S203: based on DC flow model, the active power of composite network transmission, the feasible rack Adjusted Option
And the impedance matrix, establish rack Adjusted Option analysis model.
It in the present embodiment, can be according to the static security of the rack Adjusted Option analysis model preliminary analysis network of foundation
Property, the route of initial network is analyzed either with or without overload, and rack Adjusted Option is further adjusted if overload.
In one embodiment of the invention, the initial network further includes operating normally route, and Fig. 3 is shown in Fig. 2
The specific implementation flow of S202, details are as follows for process:
S301: the active power of the initial network transmission is obtained.
In the present embodiment, in the node injecting power independent role of initial network, original initial all routes of network are passed
Defeated active power is
Pb (0)=Xb -1ATXnPn,0 (1)
In formula (1), Pb (0)Indicate the active power of initial network transmission, Pn,0Indicate the node injection of the initial network
Power, XbIndicate reactance diagonal matrix, XnIndicate that node reactance matrix, A indicate the XbWith the XnIncidence matrix.
S302: using equivalent route and the normal operation route of cut-offfing as equivalent power transmission network, and described in acquisition
The active power of equivalent power transmission network.
In the present embodiment, the active power of equivalent power transmission network are as follows:
Pb (1)=Pb,S-Xb -1ATXnAPb,S (2)
In formula (2), Pb (1)Indicate the active power of equivalent power transmission network transmission
S303: the active power superposition of active power and the equivalent power transmission network that the initial network is transmitted obtains
The active power transmitted to the composite network.
In the present embodiment, the active power of composite line transmission is
Pb=Xb -1ATXnPn,0+Pb,S-Xb -1ATXnAPb,S (3)
In formula (3), PbIndicate the active power of composite network transmission.
In one embodiment of the invention, the initial network further includes operating normally route, rack Adjusted Option point
Analyse model, comprising:
In formula (4), n indicates that the number of nodes of initial network, b indicate the route number of initial network, XbIndicate reactance to angular moment
Battle array, XnIndicate that node reactance matrix, A indicate the XbWith the XnIncidence matrix, SL,i=1 indicates that i-th line road is normal
Working line, SL,i=0 expression i-th line road is to cut-off route, Pb,SIndicate the equivalent injecting power for cut-offfing route, Pn,0It indicates
The node injecting power of the initial network, the Pb,iIndicate the transimission power on i-th line road.
In the present embodiment, by arranging the formula of the effective power of composite line transmission, equivalent cut-off is being taken into consideration
Circuit injecting power Pb,SNeed to be equivalent with the distribution of the trend after the route beginning, that is, total transmission of route compound branch is cut-off after being superimposed
Power is 0, available above-mentioned formula (4), and it is P that the generation in formula (4), which seeks variable,b,iAnd equivalent cut-off route injecting power Pb,S,
It is 2b that generation, which seeks variable number, and formula (4) shares 2b group equation, therefore for a certain given rack Adjusted Option, i.e. SLIt is given, then
Rack trend distribution situation adjusted can be quickly analyzed by solving above-mentioned linear equation (4), analyzes its static security.
In one embodiment of the invention, the specific implementation flow of S103 includes: in Fig. 1
Using the minimum overload rate of route as optimization aim, according to the rack Adjusted Option analysis model and it is mounted on
The effect of flow controller in the critical circuits of the initial network, establishes flow controller and combining for rack Adjusted Option is excellent
Change model.
In one embodiment of the invention, combined optimization model includes: objective function, equality constraint, inequality constraints
With feasible zone constraint formulations；
The objective function are as follows:
In formula (5), ωiIndicate the weight coefficient of the overload rate on i-th line road, βiIndicate the overload on i-th line road
Rate, Pb,iIndicate the transimission power on i-th line road,Indicate the maximum transmission power on i-th line road.
The equality constraint are as follows:
In formula (6), n indicates that the number of nodes of initial network, b indicate the route number of initial network, XbIndicate reactance to angular moment
Battle array, XnIndicate that node reactance matrix, A indicate the XbWith the XnIncidence matrix, Pb,SIndicate the equivalent injection for cut-offfing route
Power, Pn,0Indicate the node injecting power of the initial network, the Pb,iIndicate the transimission power on i-th line road, J indicates institute
State critical circuits, Pb,JIndicate power flowcontrol amount, PrefIndicate target power.
The inequality constraints are as follows:
In formula (7), SL,iIndicate i-th line road cut-offs state,Indicate target power maximum value, M indicates default big
Constant.
In the present embodiment, by large M, be converted to front two row formula in formula (7), wherein M be preset one compared with
Big constant.The bound constraint of two behaviors control variable to be optimized afterwards.
Feasible zone constraint are as follows: SL∈Cf, wherein CfIndicate feasible rack Adjusted Option collection.
In the present embodiment, feasible rack Adjusted Option collection is that it is described just to obtain satisfaction limitation by the short circuit current
The scheme collection for all feasible rack Adjusted Option compositions that the short circuit current of beginning network requires.
By implementing above-mentioned steps, the combined optimization to THE UPFC and rack Adjusted Option is realized.As
As a result, above-mentioned steps can obtain the best current limliting rack Adjusted Option for meeting static system safety requirements.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Embodiment 2:
As shown in figure 4, the rack for the limitation grid short circuit electric current that one embodiment of the present of invention provides adjusts device 100,
For executing the method and step in embodiment corresponding to Fig. 1 comprising:
Network electric power data computation module 110, for calculating network electric power number of the initial network under normal operating mode
According to the network electric power data include network calculation of tidal current and short circuit current；
Rack Adjusted Option analysis model establishes module 120, for obtaining and meeting limitation network according to the short circuit current
Feasible rack Adjusted Option of the rack Adjusted Option that short circuit current requires as the initial network, and according to the network tide
Stream calculation result and the feasible rack Adjusted Option, establish rack Adjusted Option analysis model；
Combined optimization model building module 130, for according to the rack Adjusted Option analysis model and flow controller
Effect, establish combined optimization model；
Rack adjusts module 140, is used for according to the combined optimization model, calculating power flowcontrol amount optimal solution, and according to
The power flowcontrol amount optimal solution carries out rack adjustment to the initial network.
From above-described embodiment it is found that the embodiment of the present invention calculates network electricity of the initial network under normal operating mode first
Force data, the network electric power data include network calculation of tidal current and short circuit current；According to the network electric power data, obtain
Take feasible rack of the rack Adjusted Option for meeting the short circuit current requirement for limiting the initial network as the initial network
Adjusted Option, and according to the network calculation of tidal current and the feasible rack Adjusted Option, establish rack Adjusted Option point
Analyse model；Then according to the effect of the rack Adjusted Option analysis model and flow controller, combined optimization model is established；Most
Afterwards according to the combined optimization model, power flowcontrol amount optimal solution is calculated, and according to the power flowcontrol amount optimal solution to described
Initial network carries out rack adjustment.The rack Adjusted Option of selection of the embodiment of the present invention is on the basis for meeting short circuit current requirement
On, consider the power flowcontrol effect of flow controller, improves the static security of rack Adjusted Option, to realize the short of network
Road electric current and static security are taken into account.
In one embodiment of the invention, initial network, the original net are carried in the feasible rack Adjusted Option
Network includes cut-offfing route and operating normally route, and the network electric power data further include impedance matrix, embodiment corresponding to Fig. 4
In the rack Adjusted Option analysis model to establish module 120 further include for executing the side in embodiment corresponding to Fig. 2
The structure of method step comprising:
It is equivalent to cut-off route design cell, for according to the feasible rack Adjusted Option, design it is equivalent cut-off route, and
Using equivalent route and the initial network of cut-offfing as composite network, the equivalent route that cut-offs is to cut-off route described
Equal in magnitude, the route of the opposite power of symbol is injected separately at associated two nodes；
Compound active power obtaining unit, for obtaining the composite network and passing according to the network calculation of tidal current
Defeated active power；
Rack Adjusted Option analysis model establishes unit, for being transmitted based on DC flow model, the composite network
Active power, the feasible rack Adjusted Option and the impedance matrix, establish rack Adjusted Option analysis model.
In one embodiment of the invention, compound active power obtaining unit further includes for executing corresponding to Fig. 3
The structure of method and step in embodiment comprising:
Initial active power obtains subelement, for obtaining the active power of the initial network transmission；
Equivalent active power obtains subelement, for using it is described it is equivalent cut-off route and the normal operation route as etc.
Power transmission network is imitated, and obtains the active power of the equivalent power transmission network；
Compound active power obtains subelement, active power and the equivalent transmission of electricity for transmitting the initial network
The active power of network is superimposed, and obtains the active power of the composite network transmission.
In one embodiment of the invention, the rack Adjusted Option analysis model, comprising:
Wherein, n indicates that the number of nodes of initial network, b indicate the route number of initial network, XbIndicate reactance diagonal matrix, Xn
Indicate that node reactance matrix, A indicate the XbWith the XnIncidence matrix, SL,i=1 indicates that i-th line road is to operate normally line
Road, SL,i=0 expression i-th line road is to cut-off route, Pb,SIndicate the equivalent injecting power for cut-offfing route, Pn,0Indicate described first
The node injecting power of beginning network, the Pb,iIndicate the transimission power on i-th line road.
In one embodiment of the invention, combined optimization model building module includes:
Using the minimum overload rate of route as optimization aim, according to the rack Adjusted Option analysis model and it is mounted on
The effect of flow controller in the critical circuits of the initial network, establishes flow controller and combining for rack Adjusted Option is excellent
Change model.
In one embodiment of the invention, the combined optimization model includes: objective function, equality constraint, inequality
Constraint and feasible zone constraint formulations；
The objective function are as follows:
Wherein, ωiIndicate the weight coefficient of the overload rate on i-th line road, βiIndicate the overload rate on i-th line road,
Pb,iIndicate the transimission power on i-th line road,Indicate the maximum transmission power on i-th line road；
The equality constraint are as follows:
Wherein, n indicates that the number of nodes of initial network, b indicate the route number of initial network, XbIndicate reactance diagonal matrix, Xn
Indicate that node reactance matrix, A indicate the XbWith the XnIncidence matrix, Pb,SIndicate the equivalent injecting power for cut-offfing route,
Pn,0Indicate the node injecting power of the initial network, the Pb,iIndicate the transimission power on i-th line road, J indicates the pass
Key route, Pb,JIndicate power flowcontrol amount, PrefIndicate target power；
The inequality constraints are as follows:
Wherein, SL,iIndicate i-th line road cut-offs state,Indicate target power maximum value, M indicates default big normal
Number；
Feasible zone constraint formulations are as follows: SL∈Cf, wherein CfIndicate feasible rack Adjusted Option collection.
In one embodiment, the rack adjustment device 100 for limiting grid short circuit electric current further includes other function module/mono-
Member, for realizing the method and step in each embodiment in embodiment 1.
Embodiment 3:
Fig. 5 is the schematic diagram for the terminal device that one embodiment of the invention provides.As shown in figure 5, the terminal of the embodiment is set
Standby 5 include: processor 50, memory 51 and are stored in the meter that can be run in the memory 51 and on the processor 50
Calculation machine program 52.The processor 50 realizes the net of above-mentioned each limitation grid short circuit electric current when executing the computer program 52
Step in frame method of adjustment embodiment, such as step 101 shown in FIG. 1 is to 104.Alternatively, the processor 50 execute it is described
The function of each module/unit in above-mentioned each Installation practice, such as module 110 to 140 shown in Fig. 4 are realized when computer program 52
Function.
The computer program 52 can be divided into one or more module/units, and one or more of modules/
Unit is stored in the memory 51, and is executed by the processor 50, to complete the present invention.One or more of moulds
Block/unit can be the series of computation machine program instruction section that can complete specific function, the instruction segment by describe it is described based on
Implementation procedure of the calculation machine program 52 in the terminal device 5.
The terminal device 5 can be the calculating such as desktop PC, notebook, palm PC and cloud server and set
It is standby.The terminal device may include, but be not limited only to, processor 50, memory 51.It will be understood by those skilled in the art that Fig. 5
The only example of terminal device 5 does not constitute the restriction to terminal device 5, may include than illustrating more or fewer portions
Part perhaps combines certain components or different components, such as the terminal device can also include input-output equipment, net
Network access device, bus etc..
Alleged processor 50 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 51 can be the internal storage unit of the terminal device 5, such as the hard disk or interior of terminal device 5
It deposits.The memory 51 is also possible to the External memory equipment of the terminal device 5, such as be equipped on the terminal device 5
Plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card dodge
Deposit card (Flash Card) etc..Further, the memory 51 can also both include the storage inside list of the terminal device 5
Member also includes External memory equipment.The memory 51 is for storing needed for the computer program and the terminal device
Other programs and data.The memory 51 can be also used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..Computer-readable Jie
Matter may include: can carry the computer program code any entity or device, recording medium, USB flash disk, mobile hard disk,
Magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as does not include electric carrier signal and electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of rack method of adjustment for limiting grid short circuit electric current characterized by comprising
Network electric power data of the initial network under normal operating mode are calculated, the network electric power data include network trend meter
Calculate result and short circuit current；
According to the network electric power data, obtains and meet the rack Adjusted Option that the short circuit current for limiting the initial network requires
As the feasible rack Adjusted Option of the initial network, and according to the network calculation of tidal current and the feasible rack tune
Perfect square case establishes rack Adjusted Option analysis model；
According to the effect of the rack Adjusted Option analysis model and flow controller, combined optimization model is established；
According to the combined optimization model, power flowcontrol amount optimal solution is calculated, and according to the power flowcontrol amount optimal solution to institute
It states initial network and carries out rack adjustment.
2. the rack method of adjustment of limitation grid short circuit electric current as described in claim 1, which is characterized in that the feasible rack
Initial network is carried in Adjusted Option, the initial network includes cut-offfing route, and the network electric power data further include Impedance Moment
Battle array, it is described according to the network calculation of tidal current and the feasible rack Adjusted Option, establish rack Adjusted Option analysis mould
Type, comprising:
According to the feasible rack Adjusted Option, design it is equivalent cut-off route, and by the equivalent route and described initial of cut-offfing
For network as composite network, the equivalent route that cut-offs is to be injected separately into size at associated two nodes of route in described cut-off
The route of power equal, symbol is opposite；
According to the network calculation of tidal current, the active power of the composite network transmission is obtained；
Active power, the feasible rack Adjusted Option and the resistance transmitted based on DC flow model, the composite network
Anti- matrix establishes rack Adjusted Option analysis model.
3. the rack method of adjustment of limitation grid short circuit electric current as claimed in claim 2, which is characterized in that the initial network
It further include operating normally route, it is described according to the network calculation of tidal current, obtain the wattful power of the composite network transmission
Rate, comprising:
Obtain the active power of the initial network transmission；
Using the equivalent route and the normal operation route of cut-offfing as equivalent power transmission network, and obtain the equivalent power transmission network
The active power of network；
The active power of active power and the equivalent power transmission network that the initial network is transmitted is superimposed, and is obtained described compound
The active power of network transmission.
4. the rack method of adjustment of limitation grid short circuit electric current as claimed in claim 2, which is characterized in that the initial network
It further include operating normally route, the rack Adjusted Option analysis model are as follows:
Wherein, n indicates that the number of nodes of initial network, b indicate the route number of initial network, XbIndicate reactance diagonal matrix, XnIt indicates
Node reactance matrix, A indicate the XbWith the XnIncidence matrix, SL,i=1 indicates that i-th line road is normal working line,
SL,i=0 expression i-th line road is to cut-off route, Pb,SIndicate the equivalent injecting power for cut-offfing route, Pn,0Indicate the original net
The node injecting power of network, Pb,iIndicate the transimission power on i-th line road.
5. the rack method of adjustment of limitation grid short circuit electric current according to any one of claims 1 to 4, which is characterized in that
The effect according to the rack Adjusted Option analysis model and flow controller, establishes combined optimization model, comprising:
Using the minimum overload rate of route as optimization aim, according to the rack Adjusted Option analysis model and it is mounted on described
The combined optimization mould of flow controller Yu rack Adjusted Option is established in the effect of flow controller in the critical circuits of initial network
Type.
6. the rack method of adjustment of limitation grid short circuit electric current as claimed in claim 5, which is characterized in that the combined optimization
Model includes: objective function, equality constraint, inequality constraints and feasible zone constraint formulations；
The objective function are as follows:
Wherein, ωiIndicate the weight coefficient of the overload rate on i-th line road, βiIndicate the overload rate on i-th line road, Pb,iTable
Show the transimission power on i-th line road,Indicate the maximum transmission power on i-th line road；
The equality constraint are as follows:
Wherein, n indicates that the number of nodes of initial network, b indicate the route number of initial network, XbIndicate reactance diagonal matrix, XnIt indicates
Node reactance matrix, A indicate the XbWith the XnIncidence matrix, Pb,SIndicate the equivalent injecting power for cut-offfing route, Pn,0Table
Show the node injecting power of the initial network, Pb,iIndicate the transimission power on i-th line road, J indicates the critical circuits, Pb,J
Indicate power flowcontrol amount, PrefIndicate target power；
The inequality constraints are as follows:
Wherein, SL,iIndicate i-th line road cut-offs state,Indicate target power maximum value, big constant is preset in M expression；
The feasible zone constraint are as follows: SL∈Cf, wherein CfIndicate feasible rack Adjusted Option collection.
7. a kind of rack for limiting grid short circuit electric current adjusts device characterized by comprising
Network electric power data computation module, it is described for calculating network electric power data of the initial network under normal operating mode
Network electric power data include network calculation of tidal current and short circuit current；
Rack Adjusted Option analysis model establishes module, for it is short to obtain satisfaction limitation network according to the network electric power data
Feasible rack Adjusted Option of the rack Adjusted Option of road current requirements as the initial network, and according to the network trend
Calculated result and the feasible rack Adjusted Option, establish rack Adjusted Option analysis model；
Combined optimization model building module, for the effect according to the rack Adjusted Option analysis model and flow controller,
Establish combined optimization model；
Rack adjusts module, for calculating power flowcontrol amount optimal solution according to the combined optimization model, and according to the trend
Control amount optimal solution carries out rack adjustment to the initial network.
8. the rack of limitation grid short circuit electric current adjusts device as claimed in claim 7, which is characterized in that the feasible rack
Initial network is carried in Adjusted Option, the initial network includes cut-offfing route and normal operation route, the network electric power number
According to further including impedance matrix, the rack Adjusted Option analysis model establishes module and includes:
It is equivalent to cut-off route design cell, for according to the feasible rack Adjusted Option, design it is equivalent cut-off route, and by institute
Equivalent route and the initial network of cut-offfing is stated as composite network, the equivalent route that cut-offs is to cut-off route association described
Two nodes at be injected separately into equal in magnitude, the route of the opposite power of symbol；
Compound active power obtaining unit, for obtaining the composite network transmission according to the network calculation of tidal current
Active power；
Rack Adjusted Option analysis model establishes unit, active for being transmitted based on DC flow model, the composite network
Power, the feasible rack Adjusted Option and the impedance matrix, establish rack Adjusted Option analysis model.
9. a kind of terminal device, including memory, processor and storage are in the memory and can be on the processor
The computer program of operation, which is characterized in that the processor realizes such as claim 1 to 6 when executing the computer program
The step of any one the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 6 of realization the method.
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