CN110071499A - A kind of method and system of the quick safe cyclization of judgement power distribution network - Google Patents
A kind of method and system of the quick safe cyclization of judgement power distribution network Download PDFInfo
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- CN110071499A CN110071499A CN201910267803.6A CN201910267803A CN110071499A CN 110071499 A CN110071499 A CN 110071499A CN 201910267803 A CN201910267803 A CN 201910267803A CN 110071499 A CN110071499 A CN 110071499A
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- H02J3/005—
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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 invention discloses a kind of method and systems for quickly judging the safe cyclization of power distribution network, can quickly judge whether route can be with cyclization.Method includes the following steps: building power distribution network typical case's cyclization model；Obtain the real time execution duty parameter of power distribution network typical case cyclization model；According to the real time execution duty parameter of power distribution network typical case's cyclization model, steady-state current during Loop Closing Operation is calculated；Construct line security cyclization condition；Route steady-state current before Loop Closing Operation in acquisition power distribution network typical case cyclization model, whether route steady-state current meets line security cyclization condition before judging Loop Closing Operation, if satisfied, then route carries out and ring operates.
Description
Technical field
This disclosure relates to a kind of method and system for quickly judging the safe cyclization of power distribution network.
Background technique
During line maintenance or load adjustment, for the continuity for ensureing resident, commercial power, need affected user
It is reduced to minimum, therefore, cyclization tune electric (heat is fallen) operation gradually replaces previous " cold fall " mode.For cyclization tune electric line, answer
Meet cyclization condition, it is ensured that the variation of trend does not exceed the limit of relay protection, place capacity etc. after cyclization, and considers
The sensitivity of route protection.Meanwhile adjusting electric equipment that must not connect with fault zone, it prevents that electricity is adjusted to cause the danger such as fault coverage expansion
Dangerous situation condition.
In existing method, some main points only is operated to distribution network closed loop and has carried out qualitative or quantitative research, contained by calculation formula
Parameter cannot directly inquire acquisition, and distribution regulation personnel still cannot quickly and effectively be instructed to judge whether to close in practical operation
Ring.
Therefore, how quickly and effectively to judge distribution line can cyclization, still lack effective technical solution.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, present disclose provides a kind of sides for quickly judging the safe cyclization of power distribution network
Method and system can quickly judge whether route can be with cyclization.
Technical solution used by the disclosure is:
A kind of method of the quick safe cyclization of judgement power distribution network, method includes the following steps:
Build power distribution network typical case's cyclization model；
Obtain the real time execution duty parameter of power distribution network typical case cyclization model；
According to the real time execution duty parameter of power distribution network typical case's cyclization model, steady-state current during Loop Closing Operation is calculated；
Construct line security cyclization condition；
Route steady-state current before Loop Closing Operation, judges line steady-state before Loop Closing Operation in acquisition power distribution network typical case cyclization model
Whether electric current meets line security cyclization condition, if satisfied, then route carries out and ring operates.
Further, the power distribution network typical case cyclization model includes positioned at the first transformer of the side 110kV, positioned at 110kV
Second transformer of side, positioned at the first line of the side 10kV being connect with the first transformer and positioned at the side 10kV and the second transformation
Second route of device connection；Interconnection switch is connected between the first line and the second route.
Further, the real time execution duty parameter of the power distribution network typical case cyclization model includes the maximum allowable electricity of route
The equivalent impedance of stream, interconnection switch two sides voltage, the first transformer of the side 110kV and the second transformer to the impedance of the side 10kV,
The first line impedance and the second line impedance of the side 10kV.
Further, during the Loop Closing Operation steady-state current calculation method are as follows:
The difference of (1-1) calculating interconnection switch two sides voltage；
(1-2) calculates the equivalent impedance of the first transformer of the side 110kV to the impedance of the side 10kV, the side 110kV the second transformer
Equivalent impedance to the impedance of the side 10kV, the side 10kV first line impedance and the second line impedance sum；
(1-2) by difference that step (1-1) obtains with step (1-2) obtain and value compared with, and multiplied by complex operator, obtain
Steady-state current during to Loop Closing Operation.
Further, the construction method of the line security cyclization condition are as follows:
According to steady-state current during Loop Closing Operation, establish before Loop Closing Operation during route steady-state current and Loop Closing Operation
The relational expression of the sum of steady-state current and line steady-state electric current after Loop Closing Operation, and according to steady-state current during Loop Closing Operation and
Impact coefficient, establish before Loop Closing Operation steady-state current and impact coefficient product during route steady-state current and Loop Closing Operation and
With the relational expression of cyclization dash current maximum virtual value；
Line current protection seting value is set, establishes line steady-state after line current protection seting value and Loop Closing Operation respectively
The relational expression of electric current, cyclization dash current maximum virtual value；
It is protected using the relationship and line current of line current protection seting value and 10kV side line road maximum permissible current
The relational expression of the second line steady-state electric current, cyclization dash current maximum virtual value, establishes the side 10kV after setting valve and Loop Closing Operation
The relationship of route maximum permissible current and route steady-state current before the difference and Loop Closing Operation of steady-state current during Loop Closing Operation
Formula；
During steady-state current during Loop Closing Operation and 10kV side line road maximum permissible current and Loop Closing Operation
The relational expression of second line steady-state electric current before the difference and cyclization of steady-state current establishes 10kV side line road maximum permissible current and most
During big Loop Closing Operation before the difference of steady-state current and Loop Closing Operation route steady-state current relational expression, as line security closes
Ring condition.
Further, the line security cyclization condition are as follows:
Wherein,The respectively two sides interconnection switch K voltage, ZH1、ZH2The respectively side 110kV A transformer and B transformation
Impedance of the device equivalent impedance to the side 10kV, Z1、Z2Respectively 10kV side line road L1And L2Impedance, impedance Z Z1、Z2、ZH1、ZH2
Among minimum virtual value, ImaxFor 10kV route maximum permissible current；I1For first line steady-state current before Loop Closing Operation；I2To close
Ring operates preceding second line steady-state electric current.
A kind of system of the quick safe cyclization of judgement power distribution network is matched it is characterized in that: running on processor or memory
Execution is set to give an order:
Build power distribution network typical case's cyclization model；
Obtain the real time execution duty parameter of power distribution network typical case cyclization model；
According to the real time execution duty parameter of power distribution network typical case's cyclization model, steady-state current during Loop Closing Operation is calculated；
Construct line security cyclization condition；
Route steady-state current before Loop Closing Operation, judges line steady-state before Loop Closing Operation in acquisition power distribution network typical case cyclization model
Whether electric current meets line security cyclization condition, if satisfied, then route carries out and ring operates.
A kind of computer readable storage medium, wherein being stored with a plurality of instruction, described instruction is suitable for by terminal device
Reason device loads and executes the method that described one kind quickly judges the safe cyclization of power distribution network.
A kind of terminal device, including processor and computer readable storage medium, processor is for realizing each instruction；It calculates
Machine readable storage medium storing program for executing is suitable for being loaded by processor and being executed described one kind and quickly sentences for storing a plurality of instruction, described instruction
The method of the disconnected safe cyclization of power distribution network.
Through the above technical solution, the beneficial effect of the disclosure is:
(1) disclosure first constructs power distribution network typical case's cyclization model, on power distribution network typical case's cyclization model, in conjunction with scheduling
SCADA system obtains typical cyclization model real time execution duty parameter, steady-state current during cyclization is calculated, before deriving cyclization
The safe cyclization conditional expression of line steady-state electric current, and can be judged according to the size of cyclization presteady state electric current cyclization；
(2) disclosure is for a certain specific circuit, and route real-time current is less than line steady-state before maximum cyclization before cyclization
When electric current, can safe cyclization simplify distinguishing rule without being calculated or tested again in advance, quickly judge for dispatcher
Reference is provided, this method is simple and fast, safe and effective.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is the method flow diagram that the present embodiment one quickly judges the safe cyclization of power distribution network；
Fig. 2 is the structure chart of two distribution typical case's cyclization model of the present embodiment；
Fig. 3 is the simplification figure of two distribution typical case's cyclization model of the present embodiment；
Fig. 4 is the simulation model schematic diagram of distribution typical case's cyclization model；
Fig. 5 is line current waveform figure before and after cyclization；
Fig. 6 is line current waveform figure before and after critical value cyclization.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one
A kind of method for quickly judging the safe cyclization of power distribution network is present embodiments provided, referring to Fig. 1, this method includes following
Step:
S101 builds distribution typical case's cyclization model.
Specifically, the power distribution network typical case's cyclization model built in the step 101 includes being arranged in the first of the side 110kV to become
Depressor and the second transformer, and be arranged in the side 10kV first line and the second route, the first line and the first transformer
Connection, second route are connect with the second transformer, are connected with interconnection switch between the first line and the second route.
S102 obtains the real time execution duty parameter of power distribution network typical case cyclization model.
Specifically, obtaining the real-time fortune of power distribution network typical case cyclization model by SCADA dispatching system in the step 102
Row duty parameter, including route maximum permissible current, the two sides interconnection switch K voltage, the impedance etc. of the first transformer of the side 110kV
Effect is to the equivalent impedance of the impedance of the side 10kV and the second transformer to 10kV side impedance, the first line impedance of the side 10kV and second
Line impedance, the steady-state current of first line and the second route before Loop Closing Operation.
S103 calculates the steady-state current during Loop Closing Operation.
Specifically, calculating the steady-state current during Loop Closing Operation in step S103, realized using following scheme:
S103-1 calculates the difference of the two sides interconnection switch K voltage；
S103-2 calculates the equivalent impedance of the first transformer of the side 110kV to the impedance of the side 10kV, the second transformer of the side 110kV
Equivalent impedance to the impedance of the side 10kV, the side 10kV first line impedance and the second line impedance sum；
S103-3, by difference that step 103-1 is obtained with step S103-2 obtain and value compared with, and calculated multiplied by plural number
Son obtains the steady-state current during Loop Closing Operation.
S104 constructs the safe cyclization condition of first line and the second route.
Specifically, constructing the safe cyclization condition of first line in the step 104, specific implementation can be using such as
Lower scheme:
S1041-1, steady-state current during the Loop Closing Operation obtained according to step 103, establishes First Line before Loop Closing Operation
The relational expression of the sum of steady-state current and first line steady-state current after Loop Closing Operation during road steady-state current and Loop Closing Operation, with
And steady-state current and impact coefficient during the Loop Closing Operation obtained according to step 103, first line is steady before establishing Loop Closing Operation
The sum and the pass of cyclization dash current maximum virtual value of steady-state current and impact coefficient product during state electric current and Loop Closing Operation
It is formula；
First line current protection setting valve is arranged in S1041-2, establishes first line current protection setting valve respectively and closes
The relational expression of first line steady-state current, cyclization dash current maximum virtual value after ring operation；
S1041-3, using the relationship of first line current protection setting valve and 10kV side line road maximum permissible current, and
First line steady-state current, cyclization impact electricity after first line current protection setting valve and Loop Closing Operation that step 1041-2 is obtained
The relational expression for flowing maximum virtual value, establishes the difference of steady-state current during 10kV side line road maximum permissible current and Loop Closing Operation
With the relational expression of first line steady-state current before cyclization；
S1041-4 is grasped according to steady-state current during Loop Closing Operation and 10kV side line road maximum permissible current and cyclization
During work before the difference and cyclization of steady-state current first line steady-state current relational expression, it is maximum allowable to establish 10kV side line road
During electric current and maximum Loop Closing Operation before the difference and cyclization of steady-state current first line steady-state current relational expression, as the
One line security cyclization condition.
Similarly, in the step 104, the safe cyclization condition of the second route is constructed, specific implementation can use as follows
Scheme:
S1042-1, steady-state current during the Loop Closing Operation obtained according to step 103, establishes the second line before Loop Closing Operation
The relational expression of the sum of steady-state current and the second line steady-state electric current after Loop Closing Operation during road steady-state current and Loop Closing Operation, with
And steady-state current and impact coefficient during the Loop Closing Operation obtained according to step 103, the second route is steady before establishing Loop Closing Operation
The sum and the pass of cyclization dash current maximum virtual value of steady-state current and impact coefficient product during state electric current and Loop Closing Operation
It is formula；
The second line current protection seting value is arranged in S1042-2, establishes the second line current protection seting value respectively and closes
The relational expression of second line steady-state electric current, cyclization dash current maximum virtual value after ring operation；
S1042-3, using the relationship of the second line current protection seting value and 10kV side line road maximum permissible current, and
Second line steady-state electric current, cyclization impact electricity after the second line current protection seting value and Loop Closing Operation that step 1042-2 is obtained
The relational expression for flowing maximum virtual value, establishes the difference of steady-state current during 10kV side line road maximum permissible current and Loop Closing Operation
With the relational expression of the second line steady-state electric current before cyclization；
S1042-4 is grasped according to steady-state current during Loop Closing Operation and 10kV side line road maximum permissible current and cyclization
During work before the difference and cyclization of steady-state current the second line steady-state electric current relational expression, it is maximum allowable to establish 10kV side line road
During electric current and maximum Loop Closing Operation before the difference and cyclization of steady-state current the second line steady-state electric current relational expression, as the
Two line security cyclization conditions.
S105 judges whether first line steady-state current and the second line steady-state electric current meet corresponding route peace before cyclization
Full cyclization condition, if satisfied, then carrying out Loop Closing Operation.
Specifically, according to the size of first line steady-state current before cyclization, judging whether satisfaction in the step 105
One line security cyclization condition；According to the size of the second line steady-state electric current before cyclization, judge whether to meet the second line security
Cyclization condition；If all meeting simultaneously, Loop Closing Operation is carried out.
The method for the quick safe cyclization of judgement power distribution network that the present embodiment proposes first constructs power distribution network typical case cyclization model,
On power distribution network typical case's cyclization model, typical cyclization model real time execution duty parameter is obtained in conjunction with SCADA dispatching system, is counted
Steady-state current during calculation cyclization, derives the safe cyclization conditional expression of route steady-state current before cyclization, and according to cyclization
Can the size of presteady state electric current is judged cyclization.
Embodiment two
In order to make those skilled in the art be best understood from the application, a more detailed embodiment is set forth below,
The present embodiment provides a kind of methods for quickly judging the safe cyclization of power distribution network, method includes the following steps:
S201 builds distribution typical case's cyclization model.
Fig. 2 shows the structure of power distribution network typical case's cyclization model, the side 110kV is first station in power distribution network typical case's cyclization model
A transformer and second station B transformer, 10kV side line road L1And L2, route L1And L2Live nuclear phase, tentatively has cyclization condition, leads to
Cross interconnection switch K connection.
Under normal circumstances, interconnection switch K separating brake；When needing Electromagnetic coupling, interconnection switch K closes a floodgate.
S202 obtains the real time execution duty parameter of power distribution network typical case cyclization model.
Specifically, obtaining the real-time fortune of power distribution network typical case cyclization model by SCADA dispatching system in the step 202
Row duty parameter, including route maximum permissible current Imax, the two sides interconnection switch K voltageWithThe transformer of the side 110kV two
Equivalent impedance is to the side 10kV impedance ZH1And ZH2, 10kV cyclization line impedance Z1And Z2。
S203 calculates the steady-state current I during Loop Closing Operationc。
Fig. 3 shows the simplification figure of power distribution network typical case's cyclization model, and balance nodes are considered as 110kV bus, and three in Fig. 3
It is symmetrical.
Alloy White Iron by before cyclization steady-state current and cyclization circulation two parts form, size can be carried out according to superposition theorem
It calculates.
Specifically, in the step 203, definitionIt is cyclization in the process by the two sides interconnection switch K voltage
Caused steady-state current defines IcIt can be obtained for corresponding virtual value according to parameter shown in superposition theorem and Fig. 3:
In formula,The respectively two sides interconnection switch K voltage, ZH1、ZH2The respectively side 110kV A transformer and B transformation
Impedance of the device equivalent impedance to the side 10kV, Z1、Z2Respectively 10kV side line road L1And L2Impedance.
Step 204, route L before acquisition cyclization1And L2Steady-state current I1、I2, judge route L before cyclization1And L2Stable state
Electric current I1、I2With the size I of route maximum permissible currentmaxWhether line security cyclization condition is met, if satisfied, can then be closed
Ring operation.
Specifically, in the step 204, if before Loop Closing Operation, 10kV side line road L1With route L2Steady-state current is respectivelyAnd corresponding virtual value is respectively I1、I2, after Loop Closing Operation, 10kV side line road L1With route L2Steady-state current is
And corresponding virtual value is respectively I '1、I′2, I 'tFor cyclization dash current maximum virtual value, then have:
I′t≤I1+kIc (3)
Wherein, k is impact coefficient, takes 1.62；After Loop Closing Operation, 10kV side line road L1Steady-state current；I′1For
Virtual value；Before Loop Closing Operation, 10kV side line road L1Steady-state current；I1ForVirtual value；I′tFor cyclization dash current
Maximum virtual value；For steady-state current during cyclization, IcFor corresponding virtual value.
The 10kV route maximum permissible current I obtained according to step 102maxIf corresponding line current protection setting valve is
IsetIf having:
I′1≤I1+Ic≤Imax (4)
I′t≤I1+kIc≤Iset (5)
When formula (4), (5) are set up simultaneously, for cyclization steady-state current in route itself tolerance range, transient process will not
Protective relaying maloperation is caused to be made, it can be ensured that the safety of cyclization.
For distribution line electric current three-stage protection, setting valve IsetMeet:
Imax≤Iset (6)
It is solved, is obtained by formula (4), (5), (6):
I1≤Imax-Ic (7)
When formula (7) are set up and according to obtained Ic, operator on duty can be according to route steady-state current I before cyclization1Size, directly
Can judgement be connect direct cyclization.
If impedance Z is Z1、Z2、ZH1、ZH2Among minimum virtual value, then route L is acquired by formula (1), (7) simultaneous1Safety is closed
Ring condition:
Route L can similarly be obtained2Safe cyclization condition:
In formula (8), (9), for specific substation and specific distribution line, Imax、Z can dispatched
It inquires and obtains in SCADA system, therefore for typical case's cyclization network, the route steady-state current I before cyclization1、I2Meet formula (8),
(9) when the line security cyclization condition provided, Loop Closing Operation can be carried out.
The method for the quick safe cyclization of judgement power distribution network that the present embodiment proposes first constructs power distribution network typical case cyclization model,
On power distribution network typical case's cyclization model, typical cyclization model real time execution duty parameter is obtained in conjunction with SCADA dispatching system, is counted
Steady-state current during calculation cyclization, derives the safe cyclization conditional expression of route steady-state current before cyclization, and according to cyclization
The size of presteady state electric current judge can cyclization, this method is simple and fast, safe and effective.
The present embodiment additionally provides the emulation of the method to the above-mentioned quick safe cyclization of judgement power distribution network, the Realization of Simulation
Process is as follows:
Regional typical cyclization network simulation model, line electricity before and after involutive ring are built by Matlab/Simulink module
Stream is emulated, and model is as shown in Figure 4.
In simulation process, interconnection switch K is controlled when setting 0.06s and is closed, Loop Closing Operation is carried out, Alloy White Iron wave during being somebody's turn to do
Shape is as shown in Figure 5.
From figure 5 it can be seen that the Alloy White Iron transient process duration is about 0.02s, meet tT≤tsetⅡCondition；
Route steady-state current virtual value is 141A before cyclization, in the line security cyclization condition and range that the present embodiment is proposed (less
In 337A)；Cyclization process maximum impact electric current is 411A, is less than instantaneous fast tripping protection and acts setting valve 4200A；Route after cyclization
Steady-state current virtual value is about 212A, is less than route maximum permissible current 600A.In conclusion this kind of situation will not firing line
Road protective relaying maloperation is made, and safe cyclization condition is met, can be with cyclization.
As route carrying electric current is gradually increased before cyclization, steady-state current also will be with more after cyclization dash current, cyclization
Come bigger.The route steady-state current virtual value I before cyclization2When -310A, line current waveform figure is as shown in Figure 6 before and after cyclization.From
It can be concluded that, cyclization dash current will raise to 930A, and steady-state current virtual value will also be promoted to 590A after cyclization in figure, connect
The nearly route maximum permissible current, there are some potential safety problemss for cyclization in the case of this kind, need to carry out a step calculating or test, with
Just ensure that the variation of each link trend after cyclization is no more than the limit of relay protection, the stabilization of power grids and place capacity etc..
The present embodiment also provides a kind of system for quickly judging the safe cyclization of power distribution network, which runs on processor or deposit
On reservoir, it is configured as executing to give an order:
Build power distribution network typical case's cyclization model；
Obtain the real time execution duty parameter of power distribution network typical case cyclization model；
According to the real time execution duty parameter of power distribution network typical case's cyclization model, steady-state current during Loop Closing Operation is calculated；
Construct line security cyclization condition；
Route steady-state current before Loop Closing Operation, judges line steady-state before Loop Closing Operation in acquisition power distribution network typical case cyclization model
Whether electric current meets line security cyclization condition, if satisfied, then route carries out and ring operates.
The present embodiment also provides a kind of computer readable storage medium, wherein being stored with a plurality of instruction, described instruction is suitable for
Loaded by the processor of terminal device and executed the method that described one kind quickly judges the safe cyclization of power distribution network.
The present embodiment also provides a kind of terminal device, including processor and computer readable storage medium, processor are used for
Realize each instruction；Computer readable storage medium is suitable for being loaded and being executed by processor for storing a plurality of instruction, described instruction
The method that described one kind quickly judges the safe cyclization of power distribution network.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (9)
1. a kind of method for quickly judging the safe cyclization of power distribution network, characterized in that method includes the following steps:
Build power distribution network typical case's cyclization model；
Obtain the real time execution duty parameter of power distribution network typical case cyclization model；
According to the real time execution duty parameter of power distribution network typical case's cyclization model, steady-state current during Loop Closing Operation is calculated；
Construct line security cyclization condition；
Route steady-state current before Loop Closing Operation, judges route steady-state current before Loop Closing Operation in acquisition power distribution network typical case cyclization model
Whether line security cyclization condition is met, if satisfied, then route carries out and ring operates.
2. the method for the quick safe cyclization of judgement power distribution network according to claim 1, characterized in that the power distribution network is typical
Cyclization model includes the first transformer positioned at the side 110kV, the second transformer positioned at the side 110kV, positioned at 10kV side and the
The first line that one transformer connects and the second route being connect with the second transformer positioned at the side 10kV；The first line and
Interconnection switch is connected between second route.
3. the method for the quick safe cyclization of judgement power distribution network according to claim 1, characterized in that the power distribution network is typical
The real time execution duty parameter of cyclization model include route maximum permissible current, interconnection switch two sides voltage, the side 110kV first
The equivalent impedance of transformer and the second transformer is to 10kV side impedance, the first line impedance of the side 10kV and the second line impedance.
4. the method for the quick safe cyclization of judgement power distribution network according to claim 1, characterized in that the Loop Closing Operation mistake
The calculation method of steady-state current in journey are as follows:
The difference of (1-1) calculating interconnection switch two sides voltage；
(1-2) calculates the equivalent impedance of the first transformer of the side 110kV to the impedance of the side 10kV, the impedance of the second transformer of the side 110kV
The equivalent sum to the impedance of the side 10kV, the side 10kV first line impedance and the second line impedance；
(1-3) by difference that step (1-1) obtains with step (1-2) obtain and value compared with, and multiplied by complex operator, closed
Steady-state current in ring operating process.
5. the method for the quick safe cyclization of judgement power distribution network according to claim 1, characterized in that the line security closes
The construction method of ring condition are as follows:
According to steady-state current during Loop Closing Operation, stable state during route steady-state current and Loop Closing Operation is established before Loop Closing Operation
The relational expression of the sum of electric current and line steady-state electric current after Loop Closing Operation, and according to steady-state current during Loop Closing Operation and impact
Coefficient establishes the sum and conjunction of steady-state current and impact coefficient product during route steady-state current and Loop Closing Operation before Loop Closing Operation
The relational expression of ring dash current maximum virtual value；
Line current protection seting value is set, establishes line steady-state electricity after line current protection seting value and Loop Closing Operation respectively
The relational expression of stream, cyclization dash current maximum virtual value；
Utilize the relationship and line current protection seting of line current protection seting value and 10kV side line road maximum permissible current
The relational expression of value and the second line steady-state electric current, cyclization dash current maximum virtual value after Loop Closing Operation, establishes 10kV side line road
The relational expression of maximum permissible current and route steady-state current before the difference and Loop Closing Operation of steady-state current during Loop Closing Operation；
According to stable state during steady-state current during Loop Closing Operation and 10kV side line road maximum permissible current and Loop Closing Operation
The relational expression of second line steady-state electric current before the difference and cyclization of electric current establishes 10kV side line road maximum permissible current and maximum conjunction
In ring operating process before the difference of steady-state current and Loop Closing Operation route steady-state current relational expression, as line security cyclization item
Part.
6. the method for the quick safe cyclization of judgement power distribution network according to claim 5, characterized in that the line security closes
Ring condition are as follows:
Wherein,The respectively two sides interconnection switch K voltage, ZH1、ZH2The respectively side 110kV A transformer and the resistance of B transformer
Resist the equivalent impedance to the side 10kV, Z1、Z2Respectively 10kV side line road L1And L2Impedance, impedance Z Z1、Z2、ZH1、ZH2Among
Minimum virtual value, ImaxFor 10kV route maximum permissible current；I1For first line steady-state current before Loop Closing Operation；I2For cyclization behaviour
Make preceding second line steady-state electric current.
7. one kind quickly judges the system of the safe cyclization of power distribution network, it is characterized in that: running on processor or memory, it is configured
To execute to give an order:
Build power distribution network typical case's cyclization model；
Obtain the real time execution duty parameter of power distribution network typical case cyclization model；
According to the real time execution duty parameter of power distribution network typical case's cyclization model, steady-state current during Loop Closing Operation is calculated；
Construct line security cyclization condition；
Route steady-state current before Loop Closing Operation, judges route steady-state current before Loop Closing Operation in acquisition power distribution network typical case cyclization model
Whether line security cyclization condition is met, if satisfied, then route carries out and ring operates.
8. a kind of computer readable storage medium, wherein a plurality of instruction is stored with, it is characterized in that: described instruction is suitable for being set by terminal
Standby processor loads the side that one kind described in simultaneously any one of perform claim requirement 1 to 6 quickly judges the safe cyclization of power distribution network
Method.
9. a kind of terminal device, including processor and computer readable storage medium, processor is for realizing each instruction；Computer
Readable storage medium storing program for executing is for storing a plurality of instruction, it is characterized in that: described instruction is suitable for by processor load and perform claim requires 1
The method of the safe cyclization of power distribution network is quickly judged to one kind described in any one of 6.
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