CN108199366A - Circuit Loop Closing Operation method and apparatus - Google Patents
Circuit Loop Closing Operation method and apparatus Download PDFInfo
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- CN108199366A CN108199366A CN201711279434.XA CN201711279434A CN108199366A CN 108199366 A CN108199366 A CN 108199366A CN 201711279434 A CN201711279434 A CN 201711279434A CN 108199366 A CN108199366 A CN 108199366A
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- 238000007363 ring formation reaction Methods 0.000 description 62
- 229910001037 White iron Inorganic materials 0.000 description 30
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
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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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- Supply And Distribution Of Alternating Current (AREA)
Abstract
本发明公开了一种线路合环操作方法和装置。该方法包括：根据戴维宁等效定律计算系统阻抗矩阵和电源电动势；根据所述系统阻抗矩阵和所述电源电动势建立稳态潮流模型，利用潮流计算求得合环后的稳态电流；根据计算出的稳态电流确定目标合环时间；在所述目标合环时间进行合环操作。通过本发明，达到了保证配电网运行可靠性的效果。
The invention discloses a line loop closing operation method and device. The method includes: calculating the system impedance matrix and the power supply electromotive force according to Thevenin's equivalent law; establishing a steady-state power flow model according to the system impedance matrix and the power supply electromotive force, and using the power flow calculation to obtain the steady-state current after closing the loop; according to the calculated The steady-state current determines the target loop-closing time; the loop-closing operation is performed at the target loop-closing time. Through the invention, the effect of ensuring the operation reliability of the distribution network is achieved.
Description
Technical field
The present invention relates to power domain, in particular to a kind of circuit Loop Closing Operation method and apparatus.
Background technology
With being gradually increased for customer power supply reliability, Loop Closing Operation in Distribution Network tends to be frequent, management and running personnel in order to
Power off time is reduced, improves power grid power supply reliability, cyclization grid switching operation or foundation are often carried out according to circuit operating experience
Cyclization point both end voltage amplitude estimates an Alloy White Iron, research shows that only according to previous circuit operating experience or cyclization point two
Terminal voltage amplitude estimation Alloy White Iron carries out the cyclization grid switching operation of distribution line, is easy to cause line protective devices action, deposits
In very big operational risk.Such as the circuit of the excessive initiation of circuit Alloy White Iron and transformer equipment overload, overcurrent protection or speed
Disconnected protection act forms electromagnetic looped network equivalent risk.
For the problem of cyclization grid switching operation has an adverse effect to power grid in the relevant technologies, not yet propose at present effective
Solution.
Invention content
It is a primary object of the present invention to provide a kind of circuit Loop Closing Operation method and apparatus, to solve cyclization grid switching operation
The problem of having an adverse effect to power grid.
To achieve these goals, according to an aspect of the invention, there is provided a kind of circuit Loop Closing Operation method, special
Sign is, including：According to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source；According to the system impedance square
Battle array and the electromotive force of source establish steady-state load flow model, and the steady-state current after cyclization is acquired using Load flow calculation；According to calculating
The steady-state current gone out determines the target cyclization time；Loop Closing Operation is carried out in the target cyclization time.
Further, according to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source, including：After disturbance
Voltage phase angle carry out phase angle amendment；It is calculated according to the front and rear voltage of disturbance, voltage phase angle, active power, reactive power equivalent
Real and imaginary parts, resistance and the reactance of electromotive force.
Further, the target cyclization time is determined according to the steady-state current calculated, is carried out in the target cyclization time
Loop Closing Operation, including：The steady-state current and the protection seting value that is respectively switched on feeder line, drop-out current are compared；It is closing
When electric current is less than setting valve with drop-out current after ring, into row line cyclization.
Further, the target cyclization time is determined according to the steady-state current calculated, including：It calculates in first time section
The Alloy White Iron of multiple preset time points；By the Alloy White Iron of the preset time points multiple in the first time section and guarantor
Protection unit protection definite value is compared, and obtains comparison result；The target cyclization time is determined according to the comparison result.
To achieve these goals, according to an aspect of the invention, there is provided a kind of circuit Loop Closing Operation device, special
Sign is, including：First computing unit, for according to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source；
Second computing unit for establishing steady-state load flow model according to the system impedance matrix and the electromotive force of source, utilizes tide
Stream calculation acquires the steady-state current after cyclization；Third computing unit, for determining target cyclization according to the steady-state current calculated
Time；Operating unit, for carrying out Loop Closing Operation in the target cyclization time.
Further, first computing unit includes：Revise subelemen, for carrying out phase to the voltage phase angle after disturbance
It corrects at angle；First computation subunit, for according to the front and rear voltage of disturbance, voltage phase angle, active power, reactive power calculating etc.
Imitate real and imaginary parts, resistance and the reactance of electromotive force.
Further, the third computing unit by the steady-state current with respectively switched on feeder line protection seting value, open
Power-off stream is compared；The operating unit is when electric current is less than setting valve and drop-out current after cyclization, into row line cyclization.
Further, the third computing unit includes：Second computation subunit is more in first time section for calculating
The Alloy White Iron of a preset time point；Comparing subunit, for by the preset time points multiple in the first time section
Alloy White Iron and protective device protection definite value be compared, obtain comparison result；Determination subelement, for according to the comparison
As a result the target cyclization time is determined.
To achieve these goals, according to an aspect of the invention, there is provided a kind of storage medium, which is characterized in that
The storage medium includes the program of storage, wherein, equipment where the storage medium is controlled when described program is run performs
Above-mentioned circuit Loop Closing Operation method.
To achieve these goals, according to an aspect of the invention, there is provided a kind of processor, which is characterized in that institute
Processor is stated for running program, wherein, described program performs above-mentioned circuit Loop Closing Operation method when running.
In embodiments of the present invention, according to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source；According to
System impedance matrix and electromotive force of source establish steady-state load flow model, and the steady-state current after cyclization is acquired using Load flow calculation；Root
The target cyclization time is determined according to the steady-state current calculated；Loop Closing Operation is carried out in the target cyclization time, by Matlab algorithms
Simulation software is verified, the results showed that can accurately calculate circuit Alloy White Iron, operations staff provides theory and technology for distribution
It supports, avoids the adverse effect that cyclization grid switching operation generates power grid, achieved the effect that ensure power distribution network operational reliability.
Description of the drawings
The attached drawing for forming the part of the application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart of optional circuit Loop Closing Operation method according to embodiments of the present invention；
Fig. 2 is the schematic diagram of Alloy White Iron according to embodiments of the present invention；
Fig. 3 is the schematic diagram of Alloy White Iron according to embodiments of the present invention；
Fig. 4 is a kind of schematic diagram of optional circuit Loop Closing Operation device according to embodiments of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order to which those skilled in the art is made to more fully understand application scheme, below in conjunction in the embodiment of the present application
The technical solution in the embodiment of the present application is clearly and completely described in attached drawing, it is clear that described embodiment is only
The embodiment of the application part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's all other embodiments obtained without making creative work should all belong to the model of the application protection
It encloses.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be the object for distinguishing similar, and specific sequence or precedence are described without being used for.It should be appreciated that it uses in this way
Data can be interchanged in the appropriate case, so as to embodiments herein described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps or unit clearly listed, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
For ease of description, below to the invention relates to several terms illustrate：
An embodiment of the present invention provides a kind of circuit Loop Closing Operation methods.
Fig. 1 is a kind of flow chart of optional circuit Loop Closing Operation method according to embodiments of the present invention, as shown in Figure 1,
This method includes the following steps：
Step S102：According to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source；
Step S104：Steady-state load flow model is established according to system impedance matrix and electromotive force of source, is asked using Load flow calculation
Obtain the steady-state current after cyclization；
Step S106：Steady-state current according to calculating determines the target cyclization time；
Step S108：Loop Closing Operation is carried out in the target cyclization time.
In embodiments of the present invention, according to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source；According to
System impedance matrix and electromotive force of source establish steady-state load flow model, and the steady-state current after cyclization is acquired using Load flow calculation；Root
The target cyclization time is determined according to the steady-state current calculated；Loop Closing Operation is carried out in the target cyclization time, by Matlab algorithms
Simulation software is verified, the results showed that can accurately calculate circuit Alloy White Iron, operations staff provides theory and technology for distribution
It supports, avoids the adverse effect that cyclization grid switching operation generates power grid, achieved the effect that ensure power distribution network operational reliability.
Optionally, according to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source, including：After disturbance
Voltage phase angle carries out phase angle amendment；Equivalent electricity is calculated according to the front and rear voltage of disturbance, voltage phase angle, active power, reactive power
Real and imaginary parts, resistance and the reactance of kinetic potential.
Optionally, the target cyclization time is determined according to the steady-state current calculated, cyclization behaviour is carried out in the target cyclization time
Make, including：Steady-state current and the protection seting value that is respectively switched on feeder line, drop-out current are compared；Electric current is small after cyclization
When setting valve and drop-out current, into row line cyclization.
Optionally, the target cyclization time is determined according to the steady-state current calculated, including：It calculates more in first time section
The Alloy White Iron of a preset time point；The Alloy White Iron of preset time points multiple in first time section and protective device are protected
Definite value is compared, and obtains comparison result；The target cyclization time is determined according to comparison result.
There is piezoelectric voltage U, voltage phase angle φ, active-power P, reactive power before and after disturbing by measuring wiring working line
Q, the numerical computations such as average frequency f cyclization port Impedance, in addition known cyclization line impedance further asks for circuit Alloy White Iron,
Result of calculation accuracy is high.By successively acquiring circuit Alloy White Iron per hour, circuit Alloy White Iron can be known in real time
Situation of change finally obtains the best opportunity that the circuit carries out cyclization grid switching operation.
By acquire distribution working line occur disturbance before and after related data amount calculate circuit Alloy White Iron way it is current
Do not occur calculating circuit Alloy White Iron this respect.
There is related data amount calculating circuit Alloy White Iron before and after disturbing, accuracy height by acquiring electricity operation circuit.
Circuit Alloy White Iron accuracy that the algorithm calculates is high, and ensure that wiring working line cyclization grid switching operation can
By property.
The calculating of Alloy White Iron is divided into two steps.It is the identification of Dai Weining equivalent parameters first.The 10kV outlets stood according to 110kV
Voltage magnitude, phase angle and current amplitude, phase angle measured by the distribution power automation terminal (DTU) of side installing, active-power P, nothing
Work(power Q, average frequency f and at this busbar increase load cause voltage magnitude or phase change at this, measure at the busbar
Voltage magnitude, phase angle ginseng related to current amplitude, phase angle, active-power P, reactive power Q, average frequency etc. after new change
Number.System impedance matrix and electromotive force of source is calculated using Dai Weining law of equivalence, rudimentary algorithm is as follows：
(1) phase angle amendment
The t+1 moment is learnt by distribution power automation terminal (DTU) measurementWith average frequency f.For t+1 after disturbance
MomentPhase angle amendment is carried out,
(2) Dai Weinan equivalent (computational methods of a branch)
By the t moment and U, φ, P, the Q at t+1 moment (before and after disturbance) (being provided by distribution power automation terminal DTU) given,
According to following Thevenin's equivalence computational methods, the real and imaginary parts Er of equivalent electromotive force, Ei, resistance and reactance R, X are obtained
(3) resulting value will be calculated and is converted to plural number
As shown in Fig. 2, branch A:EA=Er+jEi；ZA=R+JX；Branch B is similarly.
Trend after cyclization is calculated using P, Q before disturbance.Assuming that before cyclization, boundary room is powered by branch A.
SA=PA+JQA- (PC+jQC), SB=PB+Jqb, SC=PC+Jqc
(4) network is solved
Intermediate variable S1, SCA, SCB are designed,
SCA=S1-SA；
SCB=SC-SCA.
Z1, Z2 are the impedances on two lines road, and demarcate room trend SC, and rated voltage EN is the datum that can be known in advance
According to.Formula can be brought into and carry out correlation computations.Calculate SCA, SCB.So as to the calculating of following data.
Second step is to acquire Alloy White Iron by Load flow calculation.By previous step, upper level power supply and load are carried out equivalent
Afterwards, steady-state load flow model is established, the steady-state current after cyclization can be obtained using Load flow calculation.By this cyclization steady-state current and feedback
The protection seting value respectively switched on line is compared with drop-out current, can when electric current is less than setting valve and drop-out current after cyclization
Carry out distribution line cyclization.As shown in figure 3, its rudimentary algorithm is as follows：
(1) iteration (by taking branch A as an example)
UC=UC1=EN；
SCA1=SCA+SCA2/UC2×Z1；
Δ UA=(real (SCA1) × real (Z1)+image (SCA1) × image (Z1))/UC；
δ UA=(real (SCA1) × image (Z1)-image (SCA1) × real (Z1))/UC；
SCA2=SCA1+SA+SCA12/UA2×ZA；
AUC=(real (SCA2) × real (ZA)+image (SCA2) × image (ZA))/EA+ (real (SCA1) ×
real(Z1)+image(SCA1)×image(Z1))/UA
δ UC=(real (SCA2) × image (ZA)-image (SCA2) × real (ZA))/EA+ (real (SCA1) ×
image(Z1)-image(SCA1)×real(Z1))/UA
Compare UC2 and UC1, when difference is larger, enable UC=UC2, iterate to calculate；If difference is in a certain range, terminate meter
It calculates.
(2) Alloy White Iron calculates
IA=SCA2/EA
IA electric currents are exactly the Alloy White Iron at the circuit a certain moment, in order to ensure the safe and reliable cyclization of distribution line, I
Need to calculate Alloy White Iron hourly within the next few days, this several days Alloy White Iron and protective device guarantor as obtained by will calculate
Shield definite value is made comparisons, so that it may and it obtains the best cyclization time in one day, ensures management and running personnel when carrying out cyclization grid switching operation,
Protective device will not act.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
It is performed in computer system, although also, show logical order in flow charts, it in some cases, can be with not
The sequence being same as herein performs shown or described step.
An embodiment of the present invention provides a kind of circuit Loop Closing Operation device, which can be used for performing the embodiment of the present invention
Circuit Loop Closing Operation method.
Fig. 4 is a kind of schematic diagram of optional circuit Loop Closing Operation device according to embodiments of the present invention, as shown in figure 4,
The device includes：First computing unit 10, the second computing unit 20, third computing unit 30, operating unit 40.
First computing unit 10, for according to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source.
Second computing unit 20 for establishing steady-state load flow model according to system impedance matrix and electromotive force of source, utilizes
Load flow calculation acquires the steady-state current after cyclization.
Third computing unit 30, for determining the target cyclization time according to the steady-state current calculated.
Operating unit 40, for carrying out Loop Closing Operation in the target cyclization time.
Optionally, the first computing unit 10 includes：Revise subelemen, the first computation subunit.Revise subelemen, for pair
Voltage phase angle after disturbance carries out phase angle amendment.First computation subunit, for according to the front and rear voltage of disturbance, voltage phase angle,
Active power, reactive power calculate real and imaginary parts, resistance and the reactance of equivalent electromotive force.
Optionally, third computing unit 30 by the protection seting value respectively switched on steady-state current and feeder line, drop-out current into
Row comparison.Operating unit 40 is when electric current is less than setting valve and drop-out current after cyclization, into row line cyclization.
Optionally, third computing unit 30 includes：Second computation subunit, comparing subunit, determination subelement.Second meter
Operator unit, for calculating the Alloy White Iron of multiple preset time points in first time section.Comparing subunit, for by first
The Alloy White Iron of multiple preset time points is compared with protective device protection definite value in time interval, obtains comparison result.Really
Stator unit, for determining the target cyclization time according to comparison result.
Circuit Loop Closing Operation device include processor and memory, above-mentioned first computing unit 10, the second computing unit 20,
Third computing unit 30, operating unit 40 etc. in memory, are stored in as program unit storage by processor execution
Above procedure unit in reservoir realizes corresponding function.
Comprising kernel in processor, gone in memory to transfer corresponding program unit by kernel.Kernel can set one
Or more, perform circuit Loop Closing Operation method by adjusting kernel parameter.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one deposit
Store up chip.
An embodiment of the present invention provides a kind of storage mediums, are stored thereon with program, real when which is executed by processor
Existing circuit Loop Closing Operation method.
An embodiment of the present invention provides a kind of processor, processor is used to run program, wherein, program performs line when running
Road Loop Closing Operation method.
An embodiment of the present invention provides a kind of equipment, equipment includes processor, memory and storage on a memory and can
The program run on a processor, processor realize following steps when performing program：(method claim step, exclusive rights+from power).This
Equipment in text can be server, PC, PAD, mobile phone etc..
Present invention also provides a kind of computer program products, first when being performed on data processing equipment, being adapted for carrying out
The program of beginningization there are as below methods step：
According to Dai Weining law of equivalence computing system impedance matrixes and electromotive force of source；According to system impedance matrix and power supply
Electromotive force establishes steady-state load flow model, and the steady-state current after cyclization is acquired using Load flow calculation；According to the steady-state current calculated
Determine the target cyclization time；Loop Closing Operation is carried out in the target cyclization time.
Phase angle amendment is carried out to the voltage phase angle after disturbance；According to the front and rear voltage of disturbance, voltage phase angle, active power,
Reactive power calculates real and imaginary parts, resistance and the reactance of equivalent electromotive force.
Steady-state current and the protection seting value that is respectively switched on feeder line, drop-out current are compared；Electric current is small after cyclization
When setting valve and drop-out current, into row line cyclization.
Calculate the Alloy White Iron of multiple preset time points in first time section；When will be multiple default in first time section
Between the Alloy White Iron put be compared with protective device protection definite value, obtain comparison result；Determine that target is closed according to comparison result
The ring time.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the application
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the application
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable Jie
The example of matter.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, CD-ROM read-only memory (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic tape cassette, the storage of tape magnetic rigid disk or other magnetic storage apparatus
Or any other non-transmission medium, available for storing the information that can be accessed by a computing device.It defines, calculates according to herein
Machine readable medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
It should also be noted that, term " comprising ", "comprising" or its any other variant are intended to nonexcludability
Comprising so that process, method, commodity or equipment including a series of elements are not only including those elements, but also wrap
Include other elements that are not explicitly listed or further include for this process, method, commodity or equipment it is intrinsic will
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including element
Also there are other identical elements in process, method, commodity or equipment.
It will be understood by those skilled in the art that embodiments herein can be provided as method, system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or the embodiment in terms of combining software and hardware can be used in the application
Form.It is deposited moreover, the application can be used to can be used in one or more computers for wherein including computer usable program code
The shape of computer program product that storage media is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
It these are only embodiments herein, be not limited to the application.To those skilled in the art,
The application can have various modifications and variations.All any modifications made within spirit herein and principle, equivalent replacement,
Improve etc., it should be included within the scope of claims hereof.
Claims (10)
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| CN201711279434.XA CN108199366A (en) | 2017-12-06 | 2017-12-06 | Circuit Loop Closing Operation method and apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429312A (en) * | 2018-03-28 | 2018-08-21 | 北京小米移动软件有限公司 | Charge control method and device |
Citations (4)
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