CN110021936A - The method for determining running state of power distribution network containing ring and device - Google Patents
The method for determining running state of power distribution network containing ring and device Download PDFInfo
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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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Abstract
The embodiment of the present invention provides one kind method for determining running state of power distribution network containing ring and device, after the basic parameter and topological structure for obtaining the power distribution network containing ring, firstly, determining company's branch of the power distribution network containing ring according to topological structure；Then, in Lian Zhichu, virtual split vertexes are constructed；Then, in the power distribution network containing ring comprising virtual split vertexes, it is based on basic parameter, by the way of being pushed forward back substitution, obtains the voltage of each node in power distribution network containing ring；Finally, determining the operating status of the power distribution network containing ring according to the voltage of node each in power distribution network containing ring.It can be seen that, by constructing virtual split vertexes at company's branch of the power distribution network containing ring, make the loop checking installation " disappearance " in power distribution network containing ring, and then the method for being pushed forward back substitution can be taken, obtain the voltage of each node in power distribution network containing ring, it can be improved the efficiency for determining the operating status of the power distribution network containing ring, make power distribution network containing ring when being abnormal, can timely and effectively be safeguarded.
Description
Technical field
The present invention relates to Power System Analysis technical field more particularly to a kind of determination sides of distribution containing ring Running State
Method and device.
Background technique
With the continuous development of science and technology, people require electricity consumption whenever and wherever possible in daily life, these electricity consumptions master
It to be all to be provided by electric system.In order to guarantee the normal electricity consumption of people, it is necessary to the operating status of electric power monitoring system, i.e.,
Determine the operating status of power distribution network.When determining the operation exception of power distribution network, it is necessary to be adjusted to power distribution network, restore to match
The normal operation of power grid, to guarantee people's normal electricity consumption.
In practical applications, power distribution network includes power distribution network containing ring, includes loop checking installation in power distribution network containing ring, and annular is returned
The presence on road will increase the difficulty for determining the operating status of the power distribution network containing ring.Currently, the operation shape in order to determine the power distribution network containing ring
State mainly carries out Load flow calculation to power distribution network containing ring using modified Newton method, implicit Zbus Gaussian processes, circuit impedance method etc., into
And the operating status of the power distribution network containing ring is determined according to calculation of tidal current.
But the complexity of modified Newton method, implicit Zbus Gaussian processes, circuit impedance method is high, to power distribution network containing ring
It is more time-consuming when progress Load flow calculation, thereby reduce the efficiency for determining the operating status of the power distribution network containing ring.
Summary of the invention
In view of the above problems, the purpose of the embodiment of the present invention is that providing a kind of method for determining running state of power distribution network containing ring
And device, it can be improved the efficiency for determining the operating status of the power distribution network containing ring.
In a first aspect, the embodiment of the present invention provides a kind of method for determining running state of power distribution network containing ring, the method packet
It includes: obtaining the basic parameter and topological structure of the power distribution network containing ring, the basic parameter includes: first node, tail node, branch load
With interconnection switch position；According to the topological structure, determine that company's branch of the power distribution network containing ring, the even branch are matched with described containing ring
Partial branch in power grid forms loop checking installation；At the even branch, virtual split vertexes are constructed, the virtual split vertexes will
The even branch is divided into two branches；In the power distribution network containing ring comprising the virtual split vertexes, it is based on the basic parameter,
By the way of being pushed forward back substitution, the voltage of each node in the power distribution network containing ring is obtained；It is respectively saved according in the power distribution network containing ring
The voltage of point determines the operating status of the power distribution network containing ring.
Second aspect, the embodiment of the present invention provide a kind of determination device of Running State of distribution containing ring, described device packet
Include: receiving module is configured as obtaining the basic parameter of the power distribution network containing ring and topological structure, and the basic parameter includes: first section
Point, tail node, branch load and interconnection switch position；First determining module is configured as determining institute according to the topological structure
Company's branch of the power distribution network containing ring is stated, the partial branch in the even branch and the power distribution network containing ring forms loop checking installation；Divide module,
It is configured as at the even branch, constructs virtual split vertexes, the even branch is divided into two branch by the virtual split vertexes
Road；Computing module is configured as in the power distribution network containing ring comprising the virtual split vertexes, is based on the basic parameter, is adopted
With the mode for being pushed forward back substitution, the voltage of each node in the power distribution network containing ring is obtained；Second determining module is configured as according to institute
The voltage of each node in power distribution network containing ring is stated, determines the operating status of the power distribution network containing ring.
The third aspect, the embodiment of the present invention provide a kind of electronic equipment, and the electronic equipment includes: at least one processing
Device；And at least one processor, the bus being connected to the processor；Wherein, the processor, memory pass through described total
Line completes mutual communication；The processor is used to call program instruction in the memory, with execute said one or
Method in multiple technical solutions.
Fourth aspect, the embodiment of the present invention provide a kind of computer readable storage medium, and the storage medium includes storage
Program, wherein equipment where controlling the storage medium in described program operation executes said one or multiple technical sides
Method in case.
The method for determining running state of power distribution network containing ring and device provided in an embodiment of the present invention are obtaining power distribution network containing ring
Basic parameter and topological structure after, firstly, according to topological structure, determine company's branch of the power distribution network containing ring；Then, in Lian Zhichu,
Construct virtual split vertexes；Then, in the power distribution network containing ring comprising virtual split vertexes, it is based on basic parameter, using being pushed forward
The mode of back substitution obtains the voltage of each node in power distribution network containing ring；Finally, according to the voltage of node each in power distribution network containing ring, really
The operating status of the fixed power distribution network containing ring.As it can be seen that making to match containing ring by constructing virtual split vertexes at company's branch of the power distribution network containing ring
Loop checking installation " disappearance " in power grid, and then the method for being pushed forward back substitution can be taken, obtain the electricity of each node in power distribution network containing ring
Pressure.Since the method for being pushed forward back substitution is simple, calculating speed is fast, thus can save to power distribution network containing ring carry out Load flow calculation when
Between, and then can be improved the efficiency for determining the operating status of the power distribution network containing ring, make power distribution network containing ring when being abnormal, can obtain
To timely and effectively safeguarding.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the flow diagram one of the method for determining running state of power distribution network containing ring in the embodiment of the present invention；
Fig. 2 is the schematic diagram of the branch and even branch in the embodiment of the present invention；
Fig. 3 is the schematic diagram of the virtual split vertexes in the embodiment of the present invention；
Fig. 4 is the flow diagram two of the method for determining running state of power distribution network containing ring in the embodiment of the present invention；
Fig. 5 is the schematic diagram of the first virtual split vertexes and the second virtual split vertexes in the embodiment of the present invention；
Fig. 6 is the structure chart of the IEEE33 Node power distribution system in the embodiment of the present invention；
Fig. 7 is the branch of the IEEE33 Node power distribution system in the embodiment of the present invention and the schematic diagram for connecting branch；
Fig. 8 is the use method for determining running state of power distribution network containing ring in the embodiment of the present invention respectively in IEEE33 node
The comparison diagram of the voltage of each node obtained in radial power distribution network under distribution system and power distribution network containing ring；
Fig. 9 is the use method for determining running state of power distribution network containing ring in the embodiment of the present invention and traditional is pushed forward back substitution
The comparison diagram of the number of iterations of the method in obtaining IEEE33 Node power distribution system when the voltage of each node；
Figure 10 is the structural schematic diagram of the determination device of the Running State of distribution containing ring in the embodiment of the present invention；
Figure 11 is the structural schematic diagram of the electronic equipment in the embodiment of the present invention.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
It is fully disclosed to those skilled in the art.
The embodiment of the invention provides a kind of method for determining running state of power distribution network containing ring, this method is applied to be contained in determination
In the operating status of ring power distribution network.So-called power distribution network containing ring, can be assignment power grid in there are loop checking installations.Due to matching containing ring
There are loop checking installations in power grid, will increase the difficulty of the operating status of determining power distribution network, that is, reduce and determine the power distribution network containing ring
The efficiency of operating status, and then reduce the efficiency that design early period and later maintenance are carried out to entire electric system.And by being somebody's turn to do
The method for determining running state of power distribution network containing ring can be improved the efficiency for determining the operating status of the power distribution network containing ring.
The method for determining running state of power distribution network containing ring provided in an embodiment of the present invention is described in detail below.Fig. 1
For the flow diagram one of the method for determining running state of power distribution network containing ring in the embodiment of the present invention, shown in Figure 1, the party
Method may include:
S101: the basic parameter and topological structure of the power distribution network containing ring are obtained.
The basic parameter of the so-called power distribution network containing ring, can refer to the parameter of each transmission line of electricity in power distribution network containing ring, specifically may be used
To include: first node, tail node, branch load and interconnection switch position.When first node and tail in power distribution network containing ring has been determined
After node, it will be able to determine the load of the branch between first node and tail node, in the specific implementation process, first node with
The load of branch between tail node can refer to the admittance of the branch between first node and tail node.And interconnection switch, it can
It realizes and turns to supply between load, when the power supply of certain loads breaks down, these loads can be transferred to another confession
On power supply, another power supply is set to continue as the power supply of these loads, and then guarantee the reliability of power distribution network.
The topological structure of the so-called power distribution network containing ring, can refer to the branch in power distribution network containing ring between each node and each node
The connection relationship on road, can really reflect each node in power distribution network containing ring and its between branch practical connection relationship.
S102: according to topological structure, company's branch of the power distribution network containing ring is determined.
After getting the topological structure of the power distribution network containing ring, it will be able to know in power distribution network containing ring each node and its between
The practical connection relationship of branch, and then the branch and Lian Zhiliao being just capable of determining that in power distribution network containing ring.
Specifically, since root node, power distribution network containing ring is layered according to the topological structure of the power distribution network containing ring, it will
Branch between different node layers is as branch, using the branch between remaining associated node as even branch, so far, so that it may
Determine the Lian Zhiliao in power distribution network containing ring.Herein, the partial branch in Lian Zhiyu power distribution network containing ring is formed matches containing ring
Loop checking installation in power grid.
Illustratively, Fig. 2 is the schematic diagram of the branch and even branch in the embodiment of the present invention, wherein circle expression is matched containing ring
Node in power grid, line indicates branch or even branch, line of demarcation of the dotted line between each layer between circle.It is shown in Figure 2,
From root node 1, ring power distribution network will be contained and be divided into 4 layers, there is root node 1 in the 1st layer, and have node 2, node 5 and section in the 2nd layer
There are node 3 and node 6 in the 7, the 3rd layer of point, has node 4 in the 4th layer.Node 1 and node 2, node 2 and node 3, node 3 and section
Branch between point 4, node 1 and node 5, node 5 and node 6, node 1 and node 7 is branch, between node 5 and node 7
Branch be even branch, it can be seen that form loop checking installation between node 1, node 5 and node 7.
S103: in Lian Zhichu, virtual split vertexes are constructed.
Herein, virtual split vertexes are not the node of necessary being in power distribution network containing ring, but the section that imagination comes out
Point, the purpose for constructing virtual split vertexes are to make the loop checking installation in power distribution network containing ring to connect branch and be divided into two branches
" disappearance ", so as to calculate the voltage of each node in power distribution network containing ring by the way of being pushed forward back substitution.
Illustratively, Fig. 3 is the schematic diagram of the virtual split vertexes in the embodiment of the present invention, shown in Figure 3, virtual point
Node 301 is split by the branch cutting between node 5 and node 7 into two branches, is seen, is formed respectively by node on the whole
1, the branch that node 5 and virtual split vertexes 301 are formed and the branch formed by node 1, node 7 and virtual split vertexes 301.
By constructing virtual split vertexes in Lian Zhichu, it will be able to even branch are divided into two branches, make power distribution network containing ring
In loop checking installation " disappearance ", that is, think in power distribution network containing ring there is no loop checking installation, and then can be using being pushed forward back substitution
Mode efficiently obtains the voltage of each node in power distribution network containing ring, and then efficiently determines the operating status of the power distribution network containing ring.
S104: in the power distribution network containing ring comprising virtual split vertexes, it is based on basic parameter, using the side for being pushed forward back substitution
Formula obtains the voltage of each node in power distribution network containing ring.
It is so-called to be pushed forward back substitution, it is exactly the beginning voltage and end load of the known power distribution network containing ring, using feeder line as basic calculating
Unit.It assumes initially that whole network voltage is all voltage rating, is calculated paragraph by paragraph according to load power from end to beginning, only calculate each section
Power loss in point acquires the electric current and power loss of each branch road without calculate node voltage, and obtains beginning function accordingly
Rate, this is back substitution process；Further according to given beginning voltage and the beginning power acquired, voltage is calculated by beginning terminad paragraph by paragraph
Landing, acquires each node voltage, this is to be pushed forward process.It so repeats the above process, until the power deviation of each node meets
Until enabled condition.
Although the mode for being pushed forward back substitution is presently the most the simple and quick mode for obtaining each node voltage in power distribution network,
It is the characteristics of being pushed forward back substitution mode itself due to this, it is that can not apply to calculate in power distribution network containing ring containing ring that this, which is pushed forward back substitution mode,
The voltage of each node in power distribution network.And by constructing virtual split vertexes in Lian Zhichu, so that it may think in power distribution network containing ring
Loop checking installation " disappearance ", so, it will be able to based on the basic parameter in power distribution network containing ring, by the way of being pushed forward back substitution,
Efficiently calculate the voltage of each node in power distribution network containing ring.
S105: according to the voltage of node each in power distribution network containing ring, the operating status of the power distribution network containing ring is determined.
Due to can efficiently calculate the voltage of each node in power distribution network containing ring, Jin Erneng by the way of being pushed forward back substitution
The enough voltage according to each node in power distribution network containing ring efficiently determines the operating status of the power distribution network containing ring, can improve determination and contain
The efficiency of the operating status of ring power distribution network.And since the voltage according to each node in power distribution network containing ring determines the fortune of the power distribution network containing ring
Row state can be determined by existing mode, therefore details are not described herein.
As shown in the above, the method for determining running state of power distribution network containing ring provided in an embodiment of the present invention, is obtaining
After the basic parameter and topological structure of the power distribution network containing ring, firstly, determining company's branch of the power distribution network containing ring according to topological structure；Then,
In Lian Zhichu, virtual split vertexes are constructed；Then, in the power distribution network containing ring comprising virtual split vertexes, it is based on basic parameter,
By the way of being pushed forward back substitution, the voltage of each node in power distribution network containing ring is obtained；Finally, according to node each in power distribution network containing ring
Voltage determines the operating status of the power distribution network containing ring.As it can be seen that by constructing virtual split vertexes at company's branch of the power distribution network containing ring,
Make the loop checking installation " disappearance " in power distribution network containing ring, and then the method for being pushed forward back substitution can be taken, obtains each in power distribution network containing ring
The voltage of node.Since the method for being pushed forward back substitution is simple, calculating speed is fast, therefore can save and carry out trend to power distribution network containing ring
The time of calculating, and then can be improved the efficiency for determining the operating status of the power distribution network containing ring, it is being abnormal power distribution network containing ring
When, it can timely and effectively be safeguarded.
Further, as the refinement and extension to method shown in Fig. 1, the embodiment of the invention also provides one kind to match containing ring
The determination method of operation of power networks state.Fig. 4 is the stream of the method for determining running state of power distribution network containing ring in the embodiment of the present invention
Journey schematic diagram two, shown in Figure 4, this method may include:
S401: the basic parameter and topological structure of the power distribution network containing ring are obtained.
The basic parameter and topological structure of the power distribution network containing ring are described in detail in step S101, therefore herein no longer
It repeats.
S402: according to topological structure, the root node of the power distribution network containing ring is determined.
That is, can determine the corresponding section in starting point of the power distribution network containing ring according to the topological structure of the power distribution network containing ring
Point.Due to determining root node using existing mode according to topological structure, therefore details are not described herein.
S403: since root node, using breadth first search, all nodes in power distribution network containing ring are layered.
So-called breadth first search, also known as breadth-first search, full name in English are Breadth First Search,
English abbreviation is BFS, belongs to a kind of searching method of blindness, it is therefore an objective to systematically be unfolded and check all in power distribution network containing ring
Node.
By using breadth first search, the root node of Cong Hanhuan power distribution network starts, and can search out in power distribution network containing ring
All nodes avoid omitting any node in search process, and then guarantee to carry out all nodes in power distribution network containing ring
Accurately it is layered.
S404: using the branch between the associated node of same layer as the company of the power distribution network containing ring branch.
Since there are branches between the associated node of same layer, and the other parts in the branch and power distribution network containing ring
Branch is capable of forming the loop checking installation in power distribution network containing ring, and the presence of loop checking installation can hinder to obtain by the way of being pushed forward back substitution
The voltage of each node in power distribution network containing ring, therefore, it is necessary to find out the necessary branch for forming loop checking installation, this branch is exactly same
Branch between one layer of associated node, that is, connect branch.
S405: in Lian Zhichu, virtual split vertexes are constructed.
Herein, virtual split vertexes may include: the first virtual split vertexes and the second virtual split vertexes, wherein
First virtual split vertexes are contrary with the equivalent Injection Current of the second virtual split vertexes.
Specifically, at the even same position of branch, two virtual class nodes are constructed, the two virtual split vertexes are just
It is the first virtual split vertexes and the second virtual split vertexes.Fig. 5 be the embodiment of the present invention in the first virtual split vertexes and
The schematic diagram of second virtual split vertexes, it is shown in Figure 5, the first virtual split vertexes 502 and second are constructed on even branch 501
Virtual split vertexes 503, a part of Lian Zhi 501 and the first virtual split vertexes 502 form a branch, Lian Zhi's 501
Another part and the second virtual split vertexes 503 are formed another branch.Wherein, on the first virtual split vertexes 502
Electric current may be considered the electric current that node Injection Current is flowed out by even branch 501 from the first virtual split vertexes 502, and second is virtual
Electric current on split vertexes 503 may be considered node Injection Current from second virtual 503 company's of being flowed into branch 501 of split vertexes
Electric current, and node Injection Current is the practical electric current of loop checking installation of the company of inflow where branch in power distribution network containing ring, i.e., equivalent note
Enter electric current Ibrk, this is that resistance in voltage and loop checking installation in loop checking installation carries out division treated result.
S406: at virtual split vertexes, the first branch electric current generated by the power supply of the power distribution network containing ring is determined, and really
The second branch electric current of loop checking installation locating for fixed virtual split vertexes.
That is, the node Injection Current of loop checking installation locating for virtual class node is decomposed into first branch electric current
The first branch is avoided so that first branch electric current and second branch electric current are separately carried out Load flow calculation with second branch electric current
Electric current and second branch electric current generate additional error during successive iterations, and then improve each in the power distribution network containing ring obtained
The accuracy of the voltage of node.
It is described in detail below for first branch electric current and second branch electric current.
Step 1: determining the branch of the power distribution network containing ring according to topological structure.
Wherein, branch is the branch in power distribution network containing ring between the associated node of different levels.
Step 2: based on branch, even branch and basic parameter, determine the path matrix of the power distribution network containing ring, basic circuit matrix,
Loop-impedance matrice.
Herein, path matrix, basic circuit matrix, loop-impedance matrice are all the fundamental matrixs in loop analysis,
Path matrix be for judge two nodes in power distribution network containing ring whether loop checking installation same direction, basic circuit matrix
The matrix for describing each loop checking installation and branch incidence relation in power distribution network containing ring, loop-impedance matrice be by its circuit matrix with
Matrix determined by branch impedance matrix.
Step 3: determining first branch electric current according to the power parameter of path matrix and the power distribution network containing ring.
Specifically, first branch electric current is the electric current generated by the power supply of the power distribution network containing ring, can be obtained by formula (1)
It arrives:
f1=TTG formula (1)
Wherein, f1For first branch electric current, g is the node Injection Current generated by the power supply of the power distribution network containing ring, TTFor containing ring
The transposed matrix of the path matrix of power distribution network.
Step 4: determining second according to the loop voltage of basic circuit matrix, loop-impedance matrice and the power distribution network containing ring
Road electric current.
Specifically, second branch electric current is the electric current of loop checking installation locating for virtual split vertexes, formula (2) can be passed through
It obtains:
Wherein, f2For second branch electric current, VLFor the loop voltage of the power distribution network containing ring, BTIt is returned for the basis of the power distribution network containing ring
The transposed matrix of road matrix, ZLFor the loop-impedance matrice of the power distribution network containing ring.
It should be noted that: the determination second branch electricity in the determination first branch electric current and the 4th step in third step
Stream sequentially has no fixed sequence executing, and can be and successively executes, and is also possible to be performed simultaneously.
So far, just by the node Injection Current of loop checking installation locating for virtual class node be decomposed into first branch electric current and
Second branch electric current.
S407: utilize second branch current compensation first branch electric current, generate branch locating for virtual split vertexes etc.
Imitate Injection Current.
Specifically, equivalent Injection Current can be obtained by formula (3):
fb=f1+f2Formula (3)
Wherein, fbFor equivalent Injection Current, f1For first branch electric current, f2For second branch electric current.
S408: in the power distribution network containing ring comprising virtual split vertexes, it is based on basic parameter and equivalent Injection Current, is used
It is pushed forward the mode of back substitution, obtains the voltage of each node in power distribution network containing ring.
In the specific implementation process, it may comprise steps of:
Step 1: in the power distribution network containing ring comprising virtual split vertexes, being based on basic parameter and equivalent Injection Current, by
The upper layer node of the power distribution network containing ring successively calculates the voltage of each node layer of the power distribution network containing ring to lower level node.
Before executing step 1, the voltage of the root node using the power distribution network containing ring is needed, is initialized in power distribution network containing ring
The voltage of each feed line, feeder line here can refer to the branch in power distribution network containing ring, and the voltage of root node here can be from
It is obtained in basic parameter.And according to the voltage of root node determine the voltage of each feed line using existing technological means, therefore
Details are not described herein.
In initialization power distribution network containing ring after the voltage of each feed line, in conjunction with the injecting power of each node, from feeder line
End starts, and successively calculates the Injection Current of each node upwards.Specifically, can be obtained by formula (4):
Wherein,For the Injection Current of node i during kth time iteration, SiFor the injecting power of node i, SiIt can
To be obtained from basic parameter,For the obtained voltage of node i during -1 iteration of kth.When in the 1st
When during secondary iteration,For the voltage of the initialization of node i.And i is any one node in power distribution network containing ring.
Herein it should be understood that after obtaining the Injection Current of each node in iterative process each time, just need
The Injection Current of each node to be brought into respectively in the I of formula (1) respectively, calculate the first branch electricity of each node
Then stream recycles formula (2) to calculate the second branch electric current of each node, finally according to formula (3) that second branch is electric
Stream compensation first branch electric current, is formed equivalent Injection Current.
After equivalent Injection Current has been determined, so that it may in the power distribution network containing ring comprising virtual split vertexes, be based on base
This parameter and equivalent Injection Current, the upper layer node of You Hanhuan power distribution network successively calculate the every of the power distribution network containing ring to lower level node
The voltage of one node layer.
Specifically, can be obtained by formula (5):
Wherein,For the voltage of kth time iterative process interior joint j,For the voltage of kth time iterative process interior joint i,
Node i is a upper node layer of node j, branch of the r between node i and node j, ZrFor the impedance of branch r,For kth time
The equivalent Injection Current of branch r in iterative process.
Step 2: according to the voltage of the same node layer of the power distribution network containing ring, determine that annular locating for virtual split vertexes is returned
The loop voltage on road.
Specifically, can be obtained by formula (6):
Wherein,For the loop voltage of circuit l in kth time iterative process, circuit l is virtual split vertexes m and virtual point
The loop checking installation where node n is split,For the voltage of kth time iterative process interior joint m,To be saved in kth time iterative process
The voltage of point n.
After the loop voltage for obtaining circuit l, so that it may the voltage for obtaining all circuits in power distribution network containing ring, due to
According to the voltage in all circuits in the loop voltage of circuit l acquisition power distribution network containing ring using the prior art, therefore herein no longer
It repeats.
Step 3: according to loop voltage, the loop current of loop checking installation locating for virtual split vertexes is determined.
Specifically, can be obtained by formula (7):
Wherein,For the voltage in all circuits in power distribution network containing ring in kth time iterative process, ZLFor the power distribution network containing ring
Impedance matrix can be obtained by basic parameter,For the loop current of circuit l in kth time iterative process.
Herein it should be understood thatThe equivalent Injection Current that can be equivalent to virtual split vertexes m and virtually division
The equivalent Injection Current of node n, i.e.,
Ibrkm=-fLFormula (8)
Ibrkn=fLFormula (9)
Step 4: the loop current of the virtual split vertexes based on the different layers of power distribution network containing ring and the network source of distribution containing ring institute
The electric current of generation determines the branch current of the branch between the virtual split vertexes of the different layers of power distribution network containing ring.
Specifically, can be obtained by formula (10):
Wherein,For the branch current of branch l in kth time iterative process, IbrkiFor the injection electricity of virtual split vertexes i
Stream, if i is not virtual split vertexes, IbrkiIt is the branch being connected with node i for 0, l,To be propped up in kth time iterative process
The branch current of road j,For the Injection Current that the power supply of the power distribution network containing ring in kth time iterative process generates at node i, if
Node i non-transformer is connected, thenIt is 0.
Step 5: it according to the branch current of the branch between the virtual split vertexes of the different layers of power distribution network containing ring, counts again
Calculate the voltage of each node layer of the power distribution network containing ring.
In general, to feeder terminal, the voltage of each node is successively updated since feeder line root node, it specifically can root
It is obtained according to formula (11):
Wherein,For the voltage of kth time iterative process interior joint j,For the voltage of kth time iterative process interior joint i,
Node i is a upper node layer of node j, branch of the l between node i and node j, ZlFor the impedance of branch l,For kth time
The branch current of branch l in iterative process.
Step 6: the voltage of each node layer of the power distribution network containing ring recalculated and the corresponding node successively calculated are compared
The difference of voltage whether be less than preset threshold, if so, step 7 is executed, if it is not, thening follow the steps eight.
Step 7: the voltage of each node layer of the power distribution network containing ring recalculated is respectively saved as in power distribution network containing ring
The voltage of point.
Step 8: the voltage of each node layer of the power distribution network containing ring recalculated is matched as what is successively calculated containing ring
The voltage of each node layer of power grid recalculates the voltage of each node layer of the power distribution network containing ring again, until again again
The difference of the voltage of each node layer of the power distribution network containing ring calculated and the voltage as the corresponding node successively calculated is less than pre-
If until threshold value.
Illustratively, it is assumed that the voltage that node j is calculated in the 3rd iterative process isThe 4th iterative process is fallen into a trap
Calculate node j voltage beAnd work asWithDifference be less than preset threshold when, just willVoltage as node j；
And work asWithDifference be greater than or equal to preset threshold when, continue calculate the 5th iterative process interior joint j voltage
Judge againWithDifference whether be less than preset threshold, ifWithDifference be still greater than preset threshold, then continue to count
Calculate the voltage of the 6th iterative process interior joint jJudge againWithDifference whether be less than preset threshold, ifWithDifference be less than preset threshold, then willVoltage as node j.
It should be understood that preset threshold here can be configured according to the actual situation, it is not specifically limited herein.
S409: according to the voltage of node each in power distribution network containing ring, the operating status of the power distribution network containing ring is determined.
In step S105 to the voltage according to each node in power distribution network containing ring determine the operating status of the power distribution network containing ring into
Explanation is gone, therefore details are not described herein.So far, it is achieved that by the way of being pushed forward back substitution and determines each node in power distribution network containing ring
Voltage, and then determine the power distribution network containing ring operating status.
Illustrate the determination side of the Running State of distribution containing ring provided in an embodiment of the present invention with a specific example below
The attainable beneficial effect of implementation procedure and institute of method.Fig. 6 is the IEEE33 Node power distribution system in the embodiment of the present invention
Structure chart, shown in Figure 6, there are 33 nodes, 32 branches, 5 interconnection switch branch in the IEEE33 Node power distribution system
Road, 1 power supply.The basic parameter of IEEE33 Node power distribution system may refer to table 1:
Table 1
And the branch of IEEE33 Node power distribution system can also be determined according to Fig. 6 and connect branch, Fig. 7 is the embodiment of the present invention
In IEEE33 Node power distribution system branch and the even schematic diagram of branch, shown in Figure 7, solid line is branch, and dotted line is even branch,
Arrow indicates circuit direction.
In the basic parameter, branch and Lian Zhihou that IEEE33 Node power distribution system has been determined, so that it may be constructed in Lian Zhichu
Virtual split vertexes, and then the voltage of each node in IEEE33 Node power distribution system is obtained by the way of being pushed forward back substitution, in turn
According to the voltage of each node, the operating status of IEEE33 Node power distribution system is determined.
Next, being contained in order to illustrate the method for determining running state of power distribution network containing ring provided in an embodiment of the present invention
The voltage of each node tallies with the actual situation in ring power distribution network, and the above method is applied respectively in radial power distribution network and contained thus
The calculating of node voltage is carried out in ring power distribution network, and is compared, wherein power distribution network containing ring is to be on the basis of radial power distribution network
On increase interconnection switch, and then form the power distribution network of loop checking installation.
Fig. 8 is the use method for determining running state of power distribution network containing ring in the embodiment of the present invention respectively in IEEE33 node
The comparison diagram of the voltage of each node obtained in radial power distribution network under distribution system and power distribution network containing ring uses as shown in Figure 8
Voltage and the use power distribution network containing ring for each node that the method for determining running state of power distribution network containing ring obtains in power distribution network containing ring
The voltage for each node that method for determining running state obtains in radial power distribution network is kept substantially unanimously, in power distribution network containing ring
Loop checking installation at, voltage is lifted.It can be seen that using the Running State of distribution containing ring provided in an embodiment of the present invention
Determine that voltage of the method in determining power distribution network containing ring on each node tallies with the actual situation really.Therefore, implemented using the present invention
The method for determining running state of power distribution network containing ring that example provides can obtain accurate node voltage, and then can accurately determine
The operating status of the power distribution network containing ring.
Then, it is determining in order to illustrate the method for determining running state of power distribution network containing ring provided in an embodiment of the present invention containing ring
It is more efficient in the operating status of power distribution network, offer of the embodiment of the present invention is respectively adopted for IEEE33 Node power distribution system thus
The method for determining running state of power distribution network containing ring and traditional forward-backward sweep method, to each node in IEEE33 Node power distribution system
Voltage calculated, and then compare method provided in an embodiment of the present invention and traditional forward-backward sweep method in the number of iterations
Difference can compare the height of two methods efficiency during realization by the difference of the number of iterations.
Fig. 9 is the use method for determining running state of power distribution network containing ring in the embodiment of the present invention and traditional is pushed forward back substitution
The comparison diagram of the number of iterations of the method in obtaining IEEE33 Node power distribution system when the voltage of each node, as shown in Figure 9, the present invention
The method for determining running state of power distribution network containing ring that embodiment provides can be changed compared to traditional forward-backward sweep method with less
Generation number is faster close to voltage difference, i.e. preset threshold, therefore, the Running State of distribution containing ring provided in an embodiment of the present invention
It is more efficient in the operating status for determining the power distribution network containing ring to determine method, and then can efficiently determine the fortune of the power distribution network containing ring
Row state.
In summary content, can it is found that power distribution network containing ring provided in an embodiment of the present invention method for determining running state
Load flow calculation quickly and accurately is carried out to power distribution network containing ring, and then can quickly and accurately determine the operating status of the power distribution network containing ring
Efficiency, make power distribution network containing ring when being abnormal, can timely and effectively be safeguarded.
Based on the same inventive concept, as an implementation of the above method, the embodiment of the invention also provides one kind matches containing ring
The determining device of operation of power networks state.Figure 10 is the knot of the determination device of the Running State of distribution containing ring in the embodiment of the present invention
Structure schematic diagram, shown in Figure 10, which may include: receiving module 1001, be configured as obtaining the power distribution network containing ring
Basic parameter and topological structure, basic parameter include: first node, tail node, branch load and interconnection switch position；First determines
Module 1002 is configured as determining company's branch of the power distribution network containing ring according to topological structure, the part branch in Lian Zhiyu power distribution network containing ring
Road forms loop checking installation；Divide module 1003, is configured as constructing virtual split vertexes in Lian Zhichu, virtual split vertexes will
Even branch is divided into two branches；Computing module 1004 is configured as in the power distribution network containing ring comprising virtual split vertexes, is based on
Basic parameter obtains the voltage of each node in power distribution network containing ring by the way of being pushed forward back substitution；Second determining module 1005, quilt
It is configured to the voltage according to each node in power distribution network containing ring, determines the operating status of the power distribution network containing ring.
Based on previous embodiment, computing module is specifically configured at virtual split vertexes, is determined by power distribution network containing ring
The first branch electric current that generates of power supply, and determine the second branch electric current of loop checking installation locating for virtual split vertexes；Benefit
With second branch current compensation first branch electric current, the equivalent Injection Current of branch locating for virtual split vertexes is generated；It is wrapping
In power distribution network containing ring containing virtual split vertexes, obtained by the way of being pushed forward back substitution based on basic parameter and equivalent Injection Current
Take the voltage of each node in power distribution network containing ring.
Based on previous embodiment, computing module is specifically configured to determine the tree of the power distribution network containing ring according to topological structure
Branch, branch are the branch in power distribution network containing ring between the associated node of different levels；Based on branch, connect branch and basic ginseng
Number determines path matrix, the basic circuit matrix, loop-impedance matrice of the power distribution network containing ring；According to path matrix and distribution containing ring
The power parameter of net determines first branch electric current；According to the circuit of basic circuit matrix, loop-impedance matrice and the power distribution network containing ring
Voltage determines second branch electric current.
Based on previous embodiment, virtual split vertexes include: the first virtual split vertexes and the second virtual split vertexes, and
One virtual split vertexes are contrary with the equivalent Injection Current of the second virtual split vertexes.
Based on previous embodiment, computing module is specifically configured in the power distribution network containing ring comprising virtual split vertexes,
Based on basic parameter and equivalent Injection Current, the upper layer node of You Hanhuan power distribution network successively calculates distribution containing ring to lower level node
The voltage of each node layer of net；According to the voltage of the same node layer of the power distribution network containing ring, determine locating for virtual split vertexes
The loop voltage of loop checking installation；According to loop voltage, the loop current of loop checking installation locating for virtual split vertexes is determined；It is based on
Electric current caused by the loop current and the network source of distribution containing ring of the virtual split vertexes of the different layers of power distribution network containing ring determines and contains ring
The branch current of branch between the virtual split vertexes of power distribution network different layers；According to the virtual division of the different layers of power distribution network containing ring
The branch current of branch between node recalculates the voltage of each node layer of the power distribution network containing ring；What comparison was recalculated
Whether the voltage of each node layer of the power distribution network containing ring and the difference of the voltage of the corresponding node successively calculated are less than preset threshold；
If so, the voltage by the voltage of each node layer of the power distribution network containing ring recalculated, as node each in power distribution network containing ring；
If it is not, then by the voltage of each node layer of the power distribution network containing ring recalculated, as the every of the power distribution network containing ring successively calculated
The voltage of one node layer recalculates the voltage of each node layer of the power distribution network containing ring again, until that recalculates again contains
The difference of the voltage and the voltage as the corresponding node successively calculated of each node layer of ring power distribution network is less than preset threshold
Only.
Based on previous embodiment, the first determining module is specifically configured to determine the power distribution network containing ring according to topological structure
Root node；Since root node, using breadth first search, all nodes in power distribution network containing ring are layered；It will be same
Company branch of the branch as the power distribution network containing ring between the associated node of layer.
It need to be noted that: the description of apparatus above embodiment, be with the description of above method embodiment it is similar,
With the similar beneficial effect of same embodiment of the method.For undisclosed technical detail in apparatus of the present invention embodiment, please refer to
The description of embodiment of the present invention method and understand.
Based on the same inventive concept, the embodiment of the invention also provides a kind of electronic equipment.Figure 11 is the embodiment of the present invention
In electronic equipment structural schematic diagram, shown in Figure 11, which may include: at least one processor
1101；And at least one processor 1102, the bus 1103 being connect with processor 1101；Wherein, processor 1101, memory
1102 complete mutual communication by bus 1103；Processor 1101 is used to call the program instruction in memory 1102, with
Execute the method in said one or multiple embodiments.
It need to be noted that: the description of the above electronic equipment embodiment, the description with above method embodiment are classes
As, there is with embodiment of the method similar beneficial effect.For not draped over one's shoulders in the embodiment of the electronic equipment of the embodiment of the present invention
The technical detail of dew please refers to the description of embodiment of the present invention method and understands.
Based on the same inventive concept, the embodiment of the invention also provides a kind of computer readable storage medium, above-mentioned calculating
Machine readable storage medium storing program for executing includes the program of storage, wherein in program operation, equipment where control storage medium executes above-mentioned one
Method in a or multiple embodiments.
It need to be noted that: the description of the above computer readable storage medium embodiment, with above method embodiment
Description be it is similar, have with embodiment of the method similar beneficial effect.Computer-readable for the embodiment of the present invention is deposited
Undisclosed technical detail in the embodiment of storage media, please refers to the description of embodiment of the present invention method and understands.
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.
In a typical configuration, calculating equipment includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable Jie
The example of matter.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage or other magnetic storage devices
Or any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including element
There is also other identical elements in process, method, commodity or equipment.
It will 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 embodiment combining software and hardware aspects can be used in the application
Form.It is deposited moreover, the application can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The above is only embodiments herein, are not intended to limit this application.To those skilled in the art,
Various changes and changes are possible in this application.It is all within the spirit and principles of the present application made by any modification, equivalent replacement,
Improve etc., it should be included within the scope of the claims of this application.
Claims (10)
1. a kind of method for determining running state of power distribution network containing ring, which is characterized in that the described method includes:
Obtain the basic parameter and topological structure of the power distribution network containing ring, the basic parameter includes: that first node, tail node, branch are negative
Lotus and interconnection switch position；
According to the topological structure, company's branch of the power distribution network containing ring, the portion in the even branch and the power distribution network containing ring are determined
Branch path forms loop checking installation；
At the even branch, virtual split vertexes are constructed, the even branch is divided into two branches by the virtual split vertexes；
In the power distribution network containing ring comprising the virtual split vertexes, it is based on the basic parameter, by the way of being pushed forward back substitution,
Obtain the voltage of each node in the power distribution network containing ring；
According to the voltage of node each in the power distribution network containing ring, the operating status of the power distribution network containing ring is determined.
2. the method according to claim 1, wherein described in the distribution containing ring comprising the virtual split vertexes
In net, it is based on the basic parameter, by the way of being pushed forward back substitution, obtains the voltage of each node in the power distribution network containing ring, packet
It includes:
At the virtual split vertexes, the first branch electric current generated by the power supply of the power distribution network containing ring is determined, and really
The second branch electric current of loop checking installation locating for the fixed virtual split vertexes；
Using first branch electric current described in the second branch current compensation, branch locating for the virtual split vertexes is generated
Equivalent Injection Current；
In the power distribution network containing ring comprising the virtual split vertexes, it is based on the basic parameter and the equivalent Injection Current,
By the way of being pushed forward back substitution, the voltage of each node in the power distribution network containing ring is obtained.
3. according to the method described in claim 2, determination is by described it is characterized in that, described at the virtual split vertexes
The first branch electric current that the power supply of the power distribution network containing ring generates, and determine the of loop checking installation locating for the virtual split vertexes
Two branch currents, comprising:
According to the topological structure, determine that the branch of the power distribution network containing ring, the branch are different in the power distribution network containing ring
Branch between the associated node of level；
Based on the branch, even branch and the basic parameter, path matrix, the basis circuit of the power distribution network containing ring are determined
Matrix, loop-impedance matrice；
According to the power parameter of the path matrix and the power distribution network containing ring, the first branch electric current is determined；
According to the loop voltage of the basic circuit matrix, the loop-impedance matrice and the power distribution network containing ring, determine described in
Second branch electric current.
4. according to the method described in claim 2, it is characterized in that, the virtual split vertexes include: the first virtual division section
Point and the second virtual split vertexes, the equivalent Injection Current of the first virtual split vertexes and the described second virtual split vertexes
It is contrary.
5. according to the method described in claim 2, it is characterized in that, described in the distribution containing ring comprising the virtual split vertexes
In net, it is based on the basic parameter and the equivalent Injection Current, by the way of being pushed forward back substitution, obtains the power distribution network containing ring
In each node voltage, comprising:
In the power distribution network containing ring comprising the virtual split vertexes, it is based on the basic parameter and the equivalent Injection Current,
By the upper layer node of the power distribution network containing ring to lower level node, the electricity of each node layer of the power distribution network containing ring is successively calculated
Pressure；
According to the voltage of the same node layer of the power distribution network containing ring, loop checking installation locating for the virtual split vertexes is determined
Loop voltage；
According to the loop voltage, the loop current of loop checking installation locating for the virtual split vertexes is determined；
The loop current and the distribution containing ring network source of virtual split vertexes based on the different layers of power distribution network containing ring are produced
Raw electric current determines the branch current of the branch between the virtual split vertexes of the different layers of power distribution network containing ring；
According to the branch current of the branch between the virtual split vertexes of the different layers of power distribution network containing ring, described contain is recalculated
The voltage of each node layer of ring power distribution network；
Compare the voltage and the voltage of the corresponding node successively calculated of each node layer of the power distribution network containing ring recalculated
Difference whether be less than preset threshold；
If so, the voltage of each node layer of the power distribution network containing ring described in recalculating, as in the power distribution network containing ring
The voltage of each node；
If it is not, the voltage of each node layer of the power distribution network containing ring described in then recalculating, as containing described in successively calculating
The voltage of each node layer of ring power distribution network recalculates the voltage of each node layer of the power distribution network containing ring again, until
The voltage of each node layer of the power distribution network containing ring recalculated again and the voltage as the corresponding node successively calculated
Difference be less than the preset threshold until.
6. the method according to any one of claims 1 to 5, which is characterized in that it is described according to the topological structure, it determines
Company's branch of the power distribution network containing ring, comprising:
According to the topological structure, the root node of the power distribution network containing ring is determined；
Since the root node, using breadth first search, all nodes in the power distribution network containing ring are layered；
Using the branch between the associated node of same layer as company's branch of the power distribution network containing ring.
7. a kind of determination device of the Running State of distribution containing ring, which is characterized in that described device includes:
Receiving module is configured as obtaining the basic parameter of the power distribution network containing ring and topological structure, and the basic parameter includes: first section
Point, tail node, branch load and interconnection switch position；
First determining module is configured as determining company's branch of the power distribution network containing ring, the Lian Zhiyu according to the topological structure
Partial branch in the power distribution network containing ring forms loop checking installation；
Divide module, be configured as at the even branch, construct virtual split vertexes, the virtual split vertexes connect branch for described
It is divided into two branches；
Computing module is configured as in the power distribution network containing ring comprising the virtual split vertexes, is based on the basic parameter, is adopted
With the mode for being pushed forward back substitution, the voltage of each node in the power distribution network containing ring is obtained；
Second determining module is configured as the voltage according to each node in the power distribution network containing ring, determines the power distribution network containing ring
Operating status.
8. device according to claim 7, which is characterized in that the computing module is specifically configured to described virtual
At split vertexes, the first branch electric current generated by the power supply of the power distribution network containing ring is determined, and determine the virtual division
The second branch electric current of loop checking installation locating for node；It is raw using first branch electric current described in the second branch current compensation
At the equivalent Injection Current of branch locating for the virtual split vertexes；In the power distribution network containing ring comprising the virtual split vertexes
In, it is based on the basic parameter and the equivalent Injection Current, by the way of being pushed forward back substitution, is obtained in the power distribution network containing ring
The voltage of each node.
9. a kind of electronic equipment, which is characterized in that the electronic equipment includes:
At least one processor；
And at least one processor, the bus being connected to the processor；
Wherein, the processor, memory complete mutual communication by the bus；The processor is described for calling
Program instruction in memory, to execute such as method described in any one of claims 1 to 6.
10. a kind of computer readable storage medium, which is characterized in that the storage medium includes the program of storage, wherein in institute
Equipment where controlling the storage medium when stating program operation executes such as method described in any one of claims 1 to 6.
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