CN106655168A - Method and device for building loop closing model of power distribution network - Google Patents
Method and device for building loop closing model of power distribution network Download PDFInfo
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- CN106655168A CN106655168A CN201611132783.4A CN201611132783A CN106655168A CN 106655168 A CN106655168 A CN 106655168A CN 201611132783 A CN201611132783 A CN 201611132783A CN 106655168 A CN106655168 A CN 106655168A
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Theoretical Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a method and device for building a loop closing model of a power distribution network. The method comprises the following steps of receiving at least one loop closing parameter; calculating the flow direction and the magnitude of steady-state system load flow generated after a loop closing operation to obtain a calculation result; and comparing the calculation result with a preset protection setting value and rated carrying current of a minimum current-carrying component separately to obtain a boundary condition of the loop closing operation, wherein the boundary condition is used for determining whether the loop closing operation is permitted to be executed or not. According to the method and the device, the technical problem of a relatively high power network operation risk a due to the fact that an existing power distribution network does not have a reasonable loop closing model in the loop closing operation is solved.
Description
Technical field
The present invention relates to electrical network field, in particular to a kind of method and apparatus of the cyclization model for setting up power distribution network.
Background technology
In this area, carrying out to Distribution Network Equipment in maintenance process, mostly by the way of " break-before-make " operating,
That is, interruption maintenance.Because Distribution Network Equipment maintenance, accident treatment, load transfer etc. are related to distribution line changes of operating modes
Quite frequently, this scheme can cause to have a power failure in short-term to the sub-load of user, for some responsible consumers and for confession for operation
Electricity interrupts can be had undesirable effect than more sensitive user.
In order to avoid the fluctuation of power failure in short-term caused to user, open loop operation circuit Loop Closing Operation can be adopted, to ensure
Power supply continuity, reduces power off time, improves power supply reliability.It is many in 10kV power distribution networks with the fast development of power grid architecture
Contact ratio is stepped up, basic to realize " closed loop wiring, open loop operation " powering mode, and electrical network power supply reliability ability is obtained not
It is disconnected to be lifted.But, during Loop Closing Operation, because cyclization point both sides voltage difference, system impedance are poor or negative before breaker closing
Lotus difference is larger, causes steady-state current and dash current excessive and cause the accident of protective relaying device protection misoperation also progressively to increase
It is many, directly affect power network safety operation.
At present, domestic and international researcher has carried out numerous studies to Loop Closing Operation in Distribution Network, but is concentrated mainly on and is based on
Emulation and the research of theoretical calculation aspect.Traditional Alloy White Iron theoretical calculation method is complex, the accuracy to model parameter
Requirement is higher, while being affected by the real time execution operating mode such as higher level's electric network composition, the method for operation and equipment, Alloy White Iron theoretical calculation
Also error can be produced, it is difficult to directly apply in practice in engineering.
For above-mentioned problem, effective solution is not yet proposed at present.
The content of the invention
A kind of method and apparatus of the cyclization model for setting up power distribution network is embodiments provided, it is existing at least to solve
Loop Closing Operation in Distribution Network do not have rational cyclization model to cause the larger technical problem of power networks risk.
A kind of one side according to embodiments of the present invention, there is provided method of the cyclization model for setting up power distribution network, including：
Receive at least one cyclization parameter；According at least one cyclization parameter, the steady-state system trend stream produced after Loop Closing Operation is calculated
To and value, obtain result of calculation；By result of calculation respectively with it is default protection definite value and minimum current-carrying component specified current-carrying
Compare, obtain the boundary condition of Loop Closing Operation, wherein, boundary condition is used to determine whether to allow to perform Loop Closing Operation.
Another aspect according to embodiments of the present invention, additionally provides a kind of device of the cyclization model for setting up power distribution network, bag
Include：Receiver module, for receiving at least one cyclization parameter；Computing module, for according at least one cyclization parameter, calculating and closing
The steady-state system trend flow direction produced after ring operation and value, obtain result of calculation；Comparing module, for result of calculation to be distinguished
Compare with the specified current-carrying of default protection definite value and minimum current-carrying component, obtain the boundary condition of Loop Closing Operation, wherein,
Boundary condition is used to determine whether to allow to perform Loop Closing Operation.
In embodiments of the present invention, by receiving at least one cyclization parameter；According at least one cyclization parameter, calculate and close
The steady-state system trend flow direction produced after ring operation and value, obtain result of calculation；By result of calculation respectively with default protection
The specified current-carrying of definite value and minimum current-carrying component is compared, and obtains the boundary condition of Loop Closing Operation, wherein, boundary condition is used for
Determine whether to perform Loop Closing Operation, the purpose for creating the cyclization model of Loop Closing Operation in power distribution network has been reached, so as to realize
The technique effect of Loop Closing Operation is performed according to cyclization model in power distribution network, and then solves existing Loop Closing Operation in Distribution Network
The larger technical problem of power networks risk is caused without rational cyclization model.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is a kind of method flow diagram of cyclization model for setting up power distribution network according to embodiments of the present invention；
Fig. 2 is a kind of method flow diagram of cyclization model for optionally setting up power distribution network according to embodiments of the present invention；With
And
Fig. 3 is a kind of schematic device of cyclization model for setting up power distribution network according to embodiments of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of present invention protection
Enclose.
It should be noted that description and claims of this specification and the term " first " in above-mentioned accompanying drawing, "
Two " it is etc. the object for distinguishing similar, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating here or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation, it is intended that cover
Lid is non-exclusive to be included, and for example, process, method, system, product or the equipment for containing series of steps or unit is not necessarily limited to
Those steps clearly listed or unit, but may include clearly not list or for these processes, method, product
Or intrinsic other steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of embodiment of the method for the cyclization model for setting up power distribution network, explanation is needed
, can hold in the such as computer system of one group of computer executable instructions the step of the flow process of accompanying drawing is illustrated
OK, and, although show logical order in flow charts, but in some cases, can be with different from order herein
Perform shown or described step.
Fig. 1 is a kind of method flow diagram of cyclization model for setting up power distribution network according to embodiments of the present invention, such as Fig. 1 institutes
Show, the method comprises the steps：
Step S102, receives at least one cyclization parameter.
Specifically, in above-mentioned steps, above-mentioned cyclization parameter can be to make during power distribution network carries out Loop Closing Operation
Into the parameter that steady-state current and dash current increase, the cyclization parameter can include：The main transformer impedance of transformer station, transformer station it is negative
Short-circuit impedance of lotus and transmission line of electricity etc., before the cyclization model of power distribution network is set up, affects cyclization in typing power distribution network first
At least one cyclization parameter of operation.
In a kind of optional embodiment, above-mentioned cyclization parameter can include：The impedance of 220kV transforming plant main transformers and load,
The parameters such as 110kV transmission line of electricity short-circuit impedances, the impedance of 110kV transforming plant main transformers and load.
Herein it should be noted that generally, maximum virtual value electric current (i.e. dash current) can go out after Loop Closing Operation
Half period (for example, 0.01s) after cyclization now, the time is very short, and protection device sensitivity catches and opened less than dash current
Beginning significantly decays, therefore, the embodiment of the present application is with the steady parameter function of ETAP simulation softwares to Loop Closing Operation in Distribution Network
Cyclization model carry out system modelling.
Step S104, according at least one cyclization parameter, calculate the steady-state system trend flow direction that produces after Loop Closing Operation and
Value, obtains result of calculation.
Specifically, in above-mentioned steps, after at least one cyclization parameter of Loop Closing Operation is affected in typing power distribution network,
The cyclization parameters such as the short-circuit impedance of main transformer impedance, the load of transformer station and transmission line of electricity of transformer station according to typing, cyclization behaviour
Make steady-state system trend flow direction and value is calculated, obtain result of calculation.
Step S106, result of calculation is compared respectively with the specified current-carrying of default protection definite value and minimum current-carrying component
It is right, the boundary condition of Loop Closing Operation is obtained, wherein, boundary condition is used to determine whether to allow power distribution network to perform Loop Closing Operation.
Specifically, in above-mentioned steps, after Loop Closing Operation steady-state system trend flow direction and value is obtained, by what is obtained
Loop Closing Operation steady-state current is compared with the specified current-carrying of default protection definite value and minimum current-carrying component, so as to draw cyclization
The boundary condition of operation, as Loop Closing Operation feasibility basis for estimation.
Herein it should be noted that mesolow Alloy White Iron Traditional calculating methods calculate complex, and depend on model
The accuracy of parameter, because the following device parameters of power distribution network 10kV are numerous and jumbled and basic data is lacked, Alloy White Iron is such as examined when calculating
When considering below 10kV design impedances, system impedance increases and Alloy White Iron can be less, and calculation error is increased.Therefore the application is implemented
Ignore the impact of below 10kV design impedance pairings circular current in example, draw the Alloy White Iron boundary condition under maximum magnitude, so as to
Simplify cyclization model, be a kind of Alloy White Iron computational methods actual suitable for engineering.
From the foregoing, it will be observed that in the above embodiments of the present application, by typing at least one Loop Closing Operation steady-state current is affected
At least one cyclization parameter, and the size and Orientation of the steady-state current produced after Loop Closing Operation is calculated according to these cyclization parameters,
And compare the steady-state current for obtaining with the rated current of default protection definite value and minimum current-carrying component, obtain Loop Closing Operation
Boundary condition, the boundary condition can be used to determine whether to allow to perform Loop Closing Operation, reach cyclization behaviour in establishment power distribution network
The purpose of the cyclization model of work, it is achieved thereby that performing the technique effect of Loop Closing Operation in power distribution network according to cyclization model, enters
And solving existing Loop Closing Operation in Distribution Network does not have rational cyclization model to cause the larger technical problem of power networks risk.
In a kind of optional embodiment, above-mentioned cyclization parameter can include：The main transformer impedance of different types of transformer station,
The load of transformer station and the short-circuit impedance of transmission line of electricity.
In a kind of optional embodiment, above-mentioned Loop Closing Operation includes following three kinds of cyclization patterns：The upstream electricity of cyclization point
Source carries out cyclization between the feeder line cyclization of fanout operation, the feeder line cyclization of paired running and same bus outlet.
Specifically, in the above-described embodiments, using the first cyclization pattern, (the upstream power supply of cyclization point carries out fanout operation
Feeder line cyclization) in the case of, cyclization both end voltage is poor, phase angle difference, load difference and cyclization line impedance difference are larger, produce conjunction
Circular current is excessive to cause the danger of protective relaying device malfunction maximum；Using second cyclization pattern (upstream electricity of cyclization point
Source carries out the feeder line cyclization of paired running) in the case of, because its 220kV power supply is paired running, its cyclization point voltage difference phase
To less, Alloy White Iron is affected larger by cyclization loop wire impedance contrast, such as circuit both sides load is heavier or during larger gap
Cyclization, load uncertainty will be redistributed, it is also possible to cause circulation excessive, therefore can be by minimum in cyclization circuit both sides load
And gap arranges Loop Closing Operation to reduce false protection risk when little；Using the third cyclization pattern (upstream electricity of cyclization point
Source carries out cyclization between same bus outlet) in the case of, voltage difference, phase angle difference are minimum, and the impedance of cyclization loop wire is symmetrical,
Alloy White Iron is also minimum under the same terms.
By above-described embodiment, by assessing power distribution network low-voltage-grade closed loop operation risk, risk evaluation result is adopted
Security technique control measure are taken, the application system of Loop Closing Operation in Distribution Network success rate is effectively improved.
In a kind of optional embodiment, the upstream power supply of above-mentioned cyclization point is from same 220kv main transformer or same
Between one 10kv bus outlet, it is allowed to carry out 10kv aspect Loop Closing Operations；And/or, the upstream power supply in Loop Closing Operation comes
From the feeder line cyclization of same system subregion.
Specifically, in the above-described embodiments, cyclization can tentatively be carried out by three kinds of cyclization patterns of above-mentioned Loop Closing Operation
Operational risk size judges that level power supply is between same 220kV main transformer or same 10kV bus outlets on cyclization point
10kV aspect Loop Closing Operations can directly be carried out；Power supply backward be all from the feeder line Loop Closing Operation success rate of same system subregion compared with
Height, using corresponding cyclization control measure Loop Closing Operation success rate can be greatly improved；Looped network of the higher level from different system subregion
Cyclization, because poor big, two system loadings of two subregion phase angle difference system impedances are uneven, cyclization breaking is very risky, cyclization behaviour
Corresponding cyclization control measure must be taken before work to reduce cyclization risk.
In a kind of optional embodiment, before at least one cyclization parameter is received, as shown in Fig. 2 said method is also
Can include：Step S202, determines the switch connection of ring power network pattern in power distribution network, wherein, switch connection of ring power network pattern includes：Become
Wiring is got in touch between power station, being got in touch between transformer station and Switching Station and got in touch between wiring and frame swinging cross road between wiring, Switching Station
Contact wiring.
Specifically, in the above-described embodiments, receive at least one cyclization parameter before, choose transformer station between, power transformation
Stand and Switching Station between, between Switching Station, between frame swinging cross road four kinds of typical case's contact wiring make power distribution network breaker in middle connection of ring power network
Pattern.
By above-described embodiment, can the common interconnection switch connection of ring power network form of cover all kinds substantially.
In a kind of optional embodiment, the transformer connection group of each transformer station is identical, bus wire phase sequence and phase place phase
Together；The changing value of each loop load uncertainty is less than predetermined limit.
Specifically, in the above-described embodiments, when power distribution network carries out Loop Closing Operation, it is to be ensured that the transformer of each transformer station connects
Line group is identical, and bus wire phase sequence is identical with phase place；The changing value of each loop load uncertainty is less than predetermined limit, Yi Zhongke
In the embodiment of choosing, predetermined limit can according to the setting such as relay protection, system stability and place capacity limit.
In a kind of optional embodiment, the two lines road of the mutual band of cyclization selects high in station in same transformer station, successively
Pressing side and low-pressure side to carry out Loop Closing Operation, and coordinate higher level's scheduling carries out the cyclization in short-term of different types of electrical network.
Specifically, in the above-described embodiments, if the two lines road of the mutual band of cyclization is in same transformer station, in possible situation
Lower inner high voltage side (the 110kV, 10kV) contact it is contemplated that first conjunction is stood, then carry out Loop Closing Operation, a kind of optional enforcement in low-pressure side
In scheme, can also coordinate higher level's scheduling cooperation carries out the cyclization in short-term of 220kV, 110kV electrical network.
By above-described embodiment, it is possible to reduce power distribution network low-voltage-grade Alloy White Iron breaking risk.
In a kind of optional embodiment, before allowing to perform the Loop Closing Operation, said method can also include：
If the upstream power supply that detection obtains cyclization point belongs to same main transformer, and cyclization circuit both sides load sum
Less than the rated load of both sides switch, then allow to perform Loop Closing Operation；
Wherein, the difference of the main transformer impedance and system impedance that participate at least two transformer stations of cyclization is less than or equal to predetermined value.
Specifically, in the above-described embodiments, before cyclization grid switching operation, pairing circling point higher level power conditions carry out combing core
It is right, such as belong to same main transformer (220kV systems), and cyclization circuit both sides load sum is specified less than both sides switch negative
Lotus, then possess Loop Closing Operation primary condition, can attempt Loop Closing Operation.Meanwhile, participate in the Liang Ge transformer stations 10kV buses pair of cyclization
System impedance difference is unsuitable excessive, so as to reduce the system circulation produced because of impedance contrast.Frame swinging cross road cyclization answers prioritizing selection same
One partition system circuit cyclization, dual-ring network should rationally arrange cyclization point in the planning and designing stage, cyclization point is arranged in as far as possible same
One 220kV systems, effectively reduce the breaking risk of operation of power networks cyclization from now on.If cyclization point higher level is from different 220kV systems, should
Judge whether possess cyclization condition by cyclization theoretical calculation.
In a kind of optional embodiment, before allowing to perform the Loop Closing Operation, said method can also include：
By compensation device or adjust main transformer come adjust cyclization point both sides magnitude of voltage difference in preset range it
It is interior, and select to enter row line cyclization in first time period, wherein, it is less than predetermined value and two for network load in first time period
Time interval of the road system loading gap less than threshold value.
Specifically, in the above-described embodiments, the selection cyclization time can be by following two modes：One is to participate in cyclization
Voltage difference, phase angle difference and the load difference of cyclization point both sides are considered before line loop operation, it is identical to meet cyclization point both sides magnitude of voltage as far as possible,
Can by throwing, retreating reactive power compensator or adjust main transformer tap it is first-class realizing.Two is that the cyclization of 10kV circuits should try one's best choosing
The time period that same day network load is less, two-way system loading gap is little is selected, system loading power flow transfer during cyclization is dropped to
It is minimum.
In a kind of optional embodiment, during Loop Closing Operation is performed, said method can also include：
If in the case of detecting breaking, adjust cyclization circuit relay protection constant value to preset range, the step
Including：
By the setting time for adjusting overcurrent protection, extend non-power failure side or shorten the relay protection constant value of power failure side, and
After Loop Closing Operation is completed, recover former protection definite value.
Specifically, in the above-described embodiments, when protection overcurrent action may be caused to make breaking in Loop Closing Operation, can adopt
With the control measure of interim adjustment cyclization circuit relay protection definite value.Dual-ring network directly matches somebody with somebody cable run cyclization, can be according to power failure model
Enclose live interim adjustment overcurrent protection setting time, extend non-power failure side or shorten the power failure side relay protection excessively stream definite value time with
Alloy White Iron is escaped, recovers former protection definite value operation after the completion of Loop Closing Operation again.Frame swinging cross road can be with reference to taking inactive line one
Side breaker reclosing mode.When circuit first section (end) has a power failure, deactivation dead line side breaker reclosing is preferably adjusted.When
When circuit interlude has a power failure, disabling operation should be paid the utmost attention to and facilitate end breaker reclosing (as Attended mode or operation class garrison
Transformer station, the transformer station for possessing the long-range switching function of reclosing).
Herein it should be noted that obtaining various data needed for cyclization, for example, each voltage etc. before cyclization using existing resource
Level institute on-load, voltage, Alloy White Iron measured value situation forms automatic data collection relevant device electric current, the data list of voltage, and
Any time data can at any time be transferred carries out Loop Closing Operation calculating and statistical analysis.It is poor that system voluntarily records each level load level
Away from minimal instant, the accumulation of many secondary datas can conclude Loop Closing Operation rule, when being the point of Rational choice cyclization from now on, selection cyclization
Between, adjust protection definite value establish practical basis.Simultaneously all 10kV circuits are got in touch with SCADA and distribution automation system
Breaker carries out system partitioning mark, and dispatcher, planner's cyclization risk are effectively pointed out in Loop Closing Operation.Meanwhile, it is reduction
Cyclization time, prioritizing selection can utilize the cyclization of distribution automation system remote control drawing, solution circling point.
The above embodiments of the present application, there is provided a kind of power distribution network mesolow grade ring system, to 10kV closed loop networks
Electric current influence factor carries out theory analysis, studies Alloy White Iron computational methods, simplified rack cyclization computation model is built, according to not
Same type Loop Closing Operation result of calculation is summarized, and then is proposed effective control Alloy White Iron, improved closed loop network behaviour
Make the practicable techniques and control measures of security and be committed to practice, form 10kV closed loop networks application system and operation is former
Then, the conservative management mode of the necessary power failure operation of original distribution low-voltage-grade looped network is broken through, is that specification Beijing power distribution network does not stop
Solid theory and practice basis is established in electric grid switching operation work, and to instructing, management and running personnel are quick, accurately judge that distribution is closed
The feasibility of ring operation, reduces power networks risk, and improving power supply reliability and marketing service level has very important reality
Border meaning.
Used as a kind of optional embodiment, scheme disclosed in the application each embodiment can be used for state's net Beijing City and supply
The 10kV power distribution networks of electric company.Because Guo Wang Beijing Cities electric company is located in capital political nucleus area (Dongcheng, the row of west city two
Administrative division), used as electric service window-unit in Beijing of State Grid Corporation of China, carry guarantees National Party, political affairs, machine-operated and important state of army
Business activity safety is powered sacred duty safe against all possibilities and Missions.The local important guard station quantity of company is more, political sensitivity
Property it is strong, power supply reliability is had high demands.Based on above-mentioned each embodiment of the method for the application, suitable Beijing Power Network practical application is built
Simplified Loop Closing Operation model carry out cyclization theoretical calculation, and refine to summarize in Loop Closing Operation practical application and improve power distribution network and close
The control measure of ring processing safety, to instructing, management and running personnel are quick, accurately judge the feasibility that distribution network closed loop is operated, drop
Low power networks risk, improving power supply reliability and marketing service level has very important practical significance.
It should be noted that should by the way that above-mentioned each embodiment of the method for the application is applied into 10kV Loop Closing Operation in Distribution Network
With engineering, practice have shown that, have been achieved with following technique effect：Same 220kV main transformer or same 10kV bus outlets
Between can directly carry out 10kV aspect Loop Closing Operations, power supply backward be all from the feeder line Loop Closing Operation success rate of same system subregion compared with
Height, using level power supply, cyclization time point, the protection control measure such as definite value on adjustment cyclization point, can effectively reduce cyclization risk,
Improve Loop Closing Operation security and practicality.Higher level is from the looped network cyclization of different system subregion, and cyclization breaking risk is larger, builds
The simulation model of formwork erection plan actual components carries out cyclization Alloy White Iron and calculates Loop Closing Operation boundary condition, takes cyclization safety
Property measure select to carry out Loop Closing Operation under optimal conditions simultaneously.Up to now city network possesses 38 pairs of dual-ring networks, by this
Mesh research is reached a conclusion, wherein level power supply is all from same subregion on 10 pairs of dual-ring networks, 10 pairs of bicyclic network closed loop points respectively from
Same subregion, possesses Loop Closing Operation primary condition, accounts for the 52.6% of overall dual-ring network quantity；3 pairs of dual-ring networks can be by transforming work
Journey exchanges transformer station interval, realizes that two cyclization points, respectively from same subregion, account for the 7.9% of overall dual-ring network quantity；11 pairs
The one of cyclization point of dual-ring network from same subregion, can part Loop Closing Operation, account for the 28.9% of overall dual-ring network quantity；4 pairs
Two cyclization points of dual-ring network in different subregions, through simplifying the measuring and calculating of cyclization model buildings, do not possess direct Loop Closing Operation condition,
Account for the 10.5% of overall dual-ring network quantity.By effective Loop Closing Operation security management and control measure application, city network 76% it is double
Looped network cyclization point is capable of achieving Loop Closing Operation, breaches the conservative mould of the necessary power failure operation of original power distribution network 10kV electric pressures looped network
Formula, Loop Closing Operation rate rises to 76% by original 0%, greatly improves power distribution network operational reliability, reduces customer outage hours, increases
Plus delivery, increase customer satisfaction degree, with preferable economic and social benefit.
Embodiment 2
According to embodiments of the present invention, a kind of device embodiment of the cyclization model for setting up power distribution network is additionally provided.The present invention
The method of the cyclization model for setting up power distribution network in embodiment 1 can be performed in the device of the embodiment of the present invention 2.
Fig. 3 is a kind of schematic device of cyclization model for setting up power distribution network according to embodiments of the present invention, such as Fig. 3 institutes
Show, the device includes：Receiver module 301, computing module 303 and comparing module 305.
Wherein, receiver module 301, for receiving at least one cyclization parameter；Computing module 303, for according at least one
Individual cyclization parameter, calculates the steady-state system trend flow direction and value produced after Loop Closing Operation, obtains result of calculation；Comparing module
305, for result of calculation to be compared respectively with the specified current-carrying of default protection definite value and minimum current-carrying component, closed
The boundary condition of ring operation, wherein, boundary condition is used to determine whether to allow to perform Loop Closing Operation.
From the foregoing, it will be observed that in the above embodiments of the present application, receiver module 301 receives at least one affects Loop Closing Operation stable state
At least one cyclization parameter of electric current, computing module 303 calculates the stable state electricity produced after Loop Closing Operation according to these cyclization parameters
The size and Orientation of stream, comparing module 305 by the steady-state current for obtaining and it is default protection definite value and minimum current-carrying component volume
Determine electric current to compare, obtain the boundary condition of Loop Closing Operation, the boundary condition can be used to determine whether to allow to perform Loop Closing Operation,
The purpose for creating the cyclization model of Loop Closing Operation in power distribution network is reached, it is achieved thereby that holding according to cyclization model in power distribution network
The technique effect of row Loop Closing Operation, and then solving existing Loop Closing Operation in Distribution Network does not have rational cyclization model to cause electrical network
The larger technical problem of operation risk.
In a kind of optional embodiment, above-mentioned cyclization parameter can include：The main transformer impedance of different types of transformer station,
The load of transformer station and the short-circuit impedance of transmission line of electricity.
In a kind of optional embodiment, Loop Closing Operation includes following three kinds of cyclization patterns：The upstream power supply of cyclization point enters
Cyclization between the feeder line cyclization of row fanout operation, the feeder line cyclization of paired running and same bus outlet.
In a kind of optional embodiment, the upstream power supply of cyclization point is from same 220kv main transformer or same
Between 10kv bus outlets, it is allowed to carry out 10kv aspect Loop Closing Operations；And/or, the upstream power supply in Loop Closing Operation is all from together
The feeder line cyclization of one system partitioning.
In a kind of optional embodiment, said apparatus also include：Determining module, for determining power distribution network in switch ring
Net Connection Mode, wherein, switch connection of ring power network pattern includes：Wiring is got in touch between transformer station, is joined between transformer station and Switching Station
Get in touch between network wiring, Switching Station between wiring and frame swinging cross road and get in touch with wiring.
In a kind of optional embodiment, the transformer connection group of each transformer station is identical, bus wire phase sequence and phase place phase
Together；The changing value of each loop load uncertainty is less than predetermined limit.
In a kind of optional embodiment, the two lines road of the mutual band of cyclization selects high in station in same transformer station, successively
Pressing side and low-pressure side to carry out Loop Closing Operation, and coordinate higher level's scheduling carries out the cyclization in short-term of different types of electrical network.
In a kind of optional embodiment, said apparatus can also include：Detection module, if obtaining cyclization for detection
Whether the upstream power supply of point belongs to same main transformer, and cyclization circuit both sides load sum is specified less than both sides switch
Load, then allow to perform Loop Closing Operation；Wherein, main transformer impedance and the difference of system impedance of at least two transformer stations of cyclization are participated in
Less than or equal to predetermined value.
In a kind of optional embodiment, said apparatus can also include：First processing module, for by compensation device
Or main transformer is adjusted adjusting the difference of the magnitude of voltage of cyclization point both sides within the preset range, and select in first time period
To enter row line cyclization, wherein, for network load is less than predetermined value and two-way system loading gap is less than threshold in first time period
The time interval of value.
In a kind of optional embodiment, said apparatus also include：Adjusting module, if the situation for detecting breaking
Under, the relay protection constant value of cyclization circuit is adjusted to preset range, the adjusting module includes：Second processing module, for leading to
The setting time of the whole overcurrent protection of toning, extends non-power failure side or shortens the relay protection constant value of power failure side, and in Loop Closing Operation
After completing, recover former protection definite value.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment
The part of detailed description, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can pass through other
Mode is realized.Wherein, device embodiment described above is only schematic, such as the division of described unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, such as multiple units or component can with reference to or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can according to the actual needs be selected to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or used
When, during a computer read/write memory medium can be stored in.Based on such understanding, technical scheme is substantially
The part for contributing to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform the whole of each embodiment methods described of the invention or
Part steps.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (20)
1. a kind of method of the cyclization model for setting up power distribution network, it is characterised in that include：
Receive at least one cyclization parameter；
According at least one cyclization parameter, the steady-state system trend flow direction and value produced after Loop Closing Operation is calculated, obtained
Result of calculation；
The result of calculation is compared respectively with the specified current-carrying of default protection definite value and minimum current-carrying component, institute is obtained
The boundary condition of Loop Closing Operation is stated, wherein, the boundary condition is used to determine whether to allow to perform the Loop Closing Operation.
2. method according to claim 1, it is characterised in that the cyclization parameter includes：Different types of transformer station
The short-circuit impedance of main transformer impedance, the load of transformer station and transmission line of electricity.
3. method according to claim 1, it is characterised in that the Loop Closing Operation includes following three kinds of cyclization patterns：Close
The upstream power supply of circling point carries out being closed between the feeder line cyclization of fanout operation, the feeder line cyclization of paired running and same bus outlet
Ring.
4. method according to claim 3, it is characterised in that the upstream power supply of the cyclization point is from same 220kv
Between main transformer or same 10kv bus outlets, it is allowed to carry out 10kv aspect Loop Closing Operations；And/or, the Loop Closing Operation
In the upstream power supply be all from the feeder line cyclization of same system subregion.
5. method according to claim 1, it is characterised in that before at least one cyclization parameter is received, methods described
Also include：Determine the switch connection of ring power network pattern in power distribution network, wherein, the switch connection of ring power network pattern includes：Transformer station it
Between get in touch with wiring, wiring got in touch between transformer station and Switching Station, is got in touch with being got in touch between wiring and frame swinging cross road between Switching Station and is connect
Line.
6. method according to claim 5, it is characterised in that the transformer connection group of each transformer station is identical, bus
Phase sequence is identical with phase place；The changing value of each loop load uncertainty is less than predetermined limit.
7. method according to claim 5, it is characterised in that the two lines road of the mutual band of cyclization in same transformer station, according to
It is secondary to select station inner high voltage side and low-pressure side to carry out Loop Closing Operation, and coordinate higher level's scheduling and carry out different types of electrical network to close in short-term
Ring.
8. method as claimed in any of claims 2 to 7, it is characterised in that allowing to perform the Loop Closing Operation
Before, methods described also includes：
If whether the upstream power supply that detection obtains cyclization point belongs to same main transformer, and cyclization circuit both sides load sum
Less than the rated load of both sides switch, then allow to perform the Loop Closing Operation；
Wherein, the difference of the main transformer impedance and system impedance that participate at least two transformer stations of cyclization is less than or equal to predetermined value.
9. method as claimed in any of claims 2 to 7, it is characterised in that allowing to perform the Loop Closing Operation
Before, methods described also includes：
The difference of magnitude of voltage of cyclization point both sides is adjusted by compensation device or regulation main transformer within preset range, and
Select to enter row line cyclization in first time period, wherein, it is less than predetermined value and two for network load in the first time period
Time interval of the road system loading gap less than threshold value.
10. method as claimed in any of claims 2 to 7, it is characterised in that in the mistake for performing the Loop Closing Operation
Cheng Zhong, methods described also includes：
If in the case of detecting breaking, adjusting the relay protection constant value of cyclization circuit to preset range, the step includes：
By the setting time for adjusting overcurrent protection, extend non-power failure side or shorten the relay protection constant value of power failure side, and
After the Loop Closing Operation is completed, recover former protection definite value.
11. a kind of devices of the cyclization model for setting up power distribution network, it is characterised in that include：
Receiver module, for receiving at least one cyclization parameter；
Computing module, for according at least one cyclization parameter, calculating the steady-state system trend stream produced after Loop Closing Operation
To and value, obtain result of calculation；
Comparing module, for the result of calculation to be entered respectively with the specified current-carrying of default protection definite value and minimum current-carrying component
Row is compared, and obtains the boundary condition of the Loop Closing Operation, wherein, the boundary condition is used to determine whether to allow to perform the conjunction
Ring is operated.
12. devices according to claim 11, it is characterised in that the cyclization parameter includes：Different types of transformer station
Main transformer impedance, the load of transformer station and transmission line of electricity short-circuit impedance.
13. devices according to claim 11, it is characterised in that the Loop Closing Operation includes following three kinds of cyclization patterns：
The upstream power supply of cyclization point is carried out between the feeder line cyclization of fanout operation, the feeder line cyclization of paired running and same bus outlet
Cyclization.
14. devices according to claim 13, it is characterised in that the upstream power supply of the cyclization point is from same
Between 220kv main transformers or same 10kv bus outlets, it is allowed to carry out 10kv aspect Loop Closing Operations；And/or, the cyclization
The upstream power supply in operation is all from the feeder line cyclization of same system subregion.
15. devices according to claim 11, it is characterised in that described device also includes：Determining module, matches somebody with somebody for determining
Switch connection of ring power network pattern in electrical network, wherein, the switch connection of ring power network pattern includes：Wiring is got in touch between transformer station, is become
Get in touch with being got in touch between wiring, Switching Station between power station and Switching Station and get in touch with wiring between wiring and frame swinging cross road.
16. devices according to claim 15, it is characterised in that the transformer connection group of each transformer station is identical, it is female
Line phase sequence is identical with phase place；The changing value of each loop load uncertainty is less than predetermined limit.
17. devices according to claim 15, it is characterised in that the two lines road of the mutual band of cyclization in same transformer station,
Select station inner high voltage side and low-pressure side to carry out Loop Closing Operation successively, and coordinate higher level's scheduling and carry out different types of electrical network to close in short-term
Ring.
18. devices according to any one in claim 12 to 17, it is characterised in that described device also includes：
Detection module, if whether the upstream power supply for obtaining cyclization point for detection belongs to same main transformer, and cyclization line
Road both sides load sum then allows to perform the Loop Closing Operation less than the rated load of both sides switch；
Wherein, the difference of the main transformer impedance and system impedance that participate at least two transformer stations of cyclization is less than or equal to predetermined value.
19. devices according to any one in claim 12 to 17, it is characterised in that described device also includes：
First processing module, for by compensation device or adjust main transformer come at the difference of the magnitude of voltage for adjusting cyclization point both sides
Within preset range, and select to enter row line cyclization in first time period, wherein, it is negative for electrical network in the first time period
Lotus is less than predetermined value and two-way system loading gap is less than the time interval of threshold value.
20. devices according to any one in claim 12 to 17, it is characterised in that described device also includes：
Adjusting module, if in the case of for detecting breaking, adjusting the relay protection constant value of cyclization circuit to preset range
Interior, the adjusting module includes：
Second processing module, for by the setting time of adjustment overcurrent protection, extending non-power failure side or shortening the institute of power failure side
Relay protection constant value is stated, and after the Loop Closing Operation is completed, recovers former protection definite value.
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| CN201611132783.4A CN106655168A (en) | 2016-12-09 | 2016-12-09 | Method and device for building loop closing model of power distribution network |
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| CN201611132783.4A CN106655168A (en) | 2016-12-09 | 2016-12-09 | Method and device for building loop closing model of power distribution network |
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| CN108199366A (en) * | 2017-12-06 | 2018-06-22 | 国网北京市电力公司 | Circuit Loop Closing Operation method and apparatus |
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| CN112383080A (en) * | 2020-11-30 | 2021-02-19 | 广东电网有限责任公司 | Closed loop control method and device for alternating current-direct current hybrid operation power grid |
| CN115357859A (en) * | 2022-08-03 | 2022-11-18 | 国网江苏省电力有限公司苏州供电分公司 | 110 KV power grid target grid recognition method |
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