CN107346886A - Distribution network load turns to supply method and system - Google Patents
Distribution network load turns to supply method and system Download PDFInfo
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- CN107346886A CN107346886A CN201611108549.8A CN201611108549A CN107346886A CN 107346886 A CN107346886 A CN 107346886A CN 201611108549 A CN201611108549 A CN 201611108549A CN 107346886 A CN107346886 A CN 107346886A
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- 238000012546 transfer Methods 0.000 claims abstract description 26
- 230000011664 signaling Effects 0.000 claims abstract description 22
- 238000010937 topological data analysis Methods 0.000 claims abstract description 11
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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Abstract
Turn to supply method and system the present invention relates to a kind of distribution network load, this method includes：The remote signalling value of each switching device in power distribution network is obtained, corresponding on off state is obtained according to remote signalling value；Topological analysis is carried out to topological structure of electric figure according to the on off state of switching device, obtains supply path；Obtain the extra of each supply path and be available for load, will additionally be available for supply path that load is negative value as need to turn to supply path；The need that obtaining need to turn to supply in path turn supply user load, are searched according to topological structure of electric figure and need to turn supply the attachable supply path of user load, and extra according to the supply path found is available for what load generation need to turn to supply path turn to supply load path；According to turning to supply the on off state of switching device in load path to generate switch order, switch order is sent to corresponding switching device and carries out load transfer.In this way, supplying from turn for load can be realized, turn to supply efficiency high.
Description
Technical field
The present invention relates to technical field of power systems, turns to supply method and system more particularly to a kind of distribution network load.
Background technology
It is inessential by the operation and part of switch after load transfer refers to that power distribution network breaks down and isolated
The excision of load, under conditions of security constraint is met, while quick preferential recovery fault down stream important load is powered, also to the greatest extent
The power supply of other loads may be recovered.Load transfer can substantially reduce the loss that failure is brought, and improve power supply reliability, be to match somebody with somebody
One of important core function in Automation System of Power Network.
In conventional art, after power distribution network breaks down, typically typically by scheduling experience or carried out rough by dispatcher
Analysis, from the various load transfer paths of artificial judgment on contact bar knife, then carry out load transfer and dead electricity load is recovered
Power supply.However, with hand in hand, the appearance of the mode of connection such as multiple feed, the wiring of power distribution network is increasingly complicated, artificial to carry out
Load transfer labor intensity is big, and spends time length, causes to turn low for efficiency.
The content of the invention
Based on this, it is necessary in view of the above-mentioned problems, provide it is a kind of improve turn for efficiency a distribution network load turn supplier's method and
System.
A kind of distribution network load turns supplier's method, including：
The remote signalling value of each switching device in power distribution network is obtained from SCADA system, is obtained according to the remote signalling value to inductive switch
The on off state of device；
Topological analysis is carried out to the topological structure of electric figure to prestore according to the on off state of the switching device, owned
The supply path of connection；
The extra of each supply path is obtained respectively and is available for load, by the extra supply path work for being available for load as negative value
For that need to turn to supply path；
Obtain it is described need to turn supply path in a need turn supply user load, according to the topological structure of electric figure lookup with it is described
It need to turn to supply the attachable supply path of user load；
According to the supply path found it is extra be available for load generation it is described need to turn for path turn supply load path；
Switch order is generated according to the described turn of on off state for switching device in load path, the switch order is sent out
Switching device carries out load transfer corresponding to delivering to.
A kind of distribution network load turns to supply system, including：
On off state acquisition module, for obtaining the remote signalling value of each switching device in power distribution network from SCADA system, according to institute
State the on off state that remote signalling value obtains corresponding switching device；
Analysis of Topological Structure module, for the on off state according to the switching device to the topological structure of electric figure that prestores
Topological analysis is carried out, obtains the supply path of all connections；
Supply path analysis module, load is available for for obtaining the extra of each supply path respectively, is additionally available for described
Load need to turn to supply path for the supply path conduct of negative value；
It need to turn to supply path analysis module, turn to supply user load for obtaining the need that need to turn to supply in path, according to described
Topological structure of electric figure is searched need to turn to supply the attachable supply path of user load with described；
Turn to choose module for load path, for being available for load to generate the need according to the extra of the supply path found
Turn for path turn supply load path；
Switch order sending module, for generating switch according to the on off state for turning to supply switching device in load path
Instruction, the switch order is sent to corresponding switching device and carries out load transfer.
Above-mentioned distribution network load turns to supply method and system, by obtaining each switching device in power distribution network from SCADA system
Remote signalling value, the on off state of corresponding switching device can be obtained according to remote signalling value, can be to prestoring according to the on off state of switching device
Topological structure of electric figure carry out topological analysis, obtain the supply path of all connections；Then each supply path is obtained respectively
Load additionally is available for, will additionally be available for supply path that load is negative value as need to turn to supply path；Acquisition need to turn to supply in path
It need to turn to supply user load, be searched according to topological structure of electric figure and need to turn to supply the attachable supply path of user load；According to looking into
The supply path found it is extra be available for load generation need to turn for path turn supply load path；Last basis turns to supply load path
The on off state generation switch order of middle switching device, switch order is sent to corresponding switching device and carries out load transfer.
In this way, it be able to need to turn to supply path and corresponding turn by obtaining the data of correlation automatically and topological structure of electric figure being analyzed to obtain
For load path, so as to realize supplying from turn for load, without manual operation, turn to supply efficiency high.
Brief description of the drawings
Fig. 1 is the flow chart that distribution network load turns supplier's method in an embodiment；
Fig. 2 is to carry out topology point to the topological structure of electric figure to prestore according to the on off state of switching device in an embodiment
Analysis, obtains the particular flow sheet of the supply path of all connections；
Fig. 3 is to be available for load generation to turn to turn to supply for path according to the extra of the supply path found in an embodiment
The particular flow sheet of load path；
Fig. 4 is the module frame chart that distribution network load turns for system in an embodiment.
Embodiment
With reference to figure 1, the distribution network load in an embodiment turns supplier's method, comprises the following steps.
S110：The remote signalling value of each switching device in power distribution network is obtained from SCADA system, is obtained according to remote signalling value to inductive switch
The on off state of device.
SCADA (Supervisory Control And Data Acquisition data acquisitions control with monitoring) system
The operational outfit at scene can be monitored and controlled, electric network data, such as switching device can be got from SCADA system
Remote signalling value.Switching device, which includes breaker, disconnecting link, disconnecting switch of power distribution network etc., can realize the device cut-off.Switch dress
The on off state put includes closed and disconnected.
S120：Topological analysis is carried out to the topological structure of electric figure to prestore according to the on off state of switching device, obtains institute
There is the supply path of connection.
Topological structure of electric figure assigns the topology controlment figure of power network, can be from the data generation that SCADA system obtains.
For example, in one embodiment, include structure chart generation step before step S120：Topology controlment is obtained from SCADA system
Data, topological structure of electric figure is generated according to topology controlment data.Structure chart generation step can be before step S110
Perform, can also perform after step silo.
Supply path refer to do not power off, can normal power supply path.It can be learnt out according to the on off state of switching device
The break-make situation of conducting line segment where closing device, so as to carry out topology point to topological structure of electric figure according to the break-make situation of conducting line segment
After analysis, all supply paths can be found.Specifically, when the on off state of switching device is closes, where switching device
Conducting line segment turns on, and when the on off state of switching device is disconnects, the conducting line segment where switching device disconnects.
S130：The extra of each supply path is obtained respectively and is available for load, will additionally be available for the supply path that load is negative value
As need to turn to supply path.
Include multiple user loads on each supply path, supply path needs to provide user for each user load
Load needed for load.Additionally it is available for load to refer to outside the load for meeting all user loads included by supply path,
The load that residue is available for.It is extra be available for load can be on the occasion of, zero or negative value；It is extra to be available for load as on the occasion of expression is corresponding to supply
Power path also has remaining load to provide；It is zero to be additionally available for load, represents that corresponding supply path is just met on the paths
The load of user load；It is negative value to be additionally available for load, represents corresponding and supplies circuit overloads, may trigger power supply trouble.Therefore,
Using the supply path of overload as need to turn to supply path.
S140：The need that obtaining need to turn to supply in path turn to supply user load, are searched according to topological structure of electric figure with that need to turn to supply
The attachable supply path of user load.
It need to turn to refer in the case where meeting to turn to supply path nonoverload for user load, can not be born from that need to turn to obtain for path
The user load of lotus amount, for example, need to turn after providing load for path for preceding N1 user load, it is zero to be additionally available for load,
Then using the rear N2 user load that need to turn for path as need to turn for loading.
Whether can be viewed in topological structure of electric figure between each supply path has contact disconnecting link, if any, then it represents that connection
It can be connected between two supply paths of network disconnecting link connection.Therefore, by analyzing topological structure of electric figure, can find
With that need to turn to supply the attachable supply path of user load.Be additionally available for corresponding to the supply path found load be on the occasion of
In the case of, the corresponding supply path found can be that need to turn to turn to supply load for user load, and can turn to refer to for path need to turn to supply
Family load turns to be supplied to the path obtained after the supply path of lookup.
S150：According to the supply path found it is extra be available for load generation need to turn for path turn supply load path.
The load transfer scheme for the supply path that need to turn to turn to be supplied to lookup for user load can be a kind of, it is possibility to have more
Kind, now turn to choose one kind from kinds of schemes for load path.Generally, mark has user load in topological structure of electric figure
Significance level, such as be successively from high to low：High-order user, responsible consumer, domestic consumer.It need to turn have for user load
It is multiple, and sorted from high to low by important procedure, accordingly, each, which need to turn correspond to for user load, obtains one turn for negative
Lotus path；Load transfer scheme can specifically carry out true according to the significance level of the user load marked in topological structure of electric figure
It is fixed, such as：According to the order of significance level from high to low, each need to turn for can Zhuan Gong roads corresponding to user load is obtained respectively successively
Footpath.
S160：According to turning to supply the on off state of switching device in load path to generate switch order, switch order is sent
Load transfer is carried out to corresponding switching device.
The switching device closure of switch order user's control instruction and the switching device of control instruction disconnect, so that will
It need to turn to turn to supply to cut off transfer in path from the need at original place for user load, to realize load transfer.
Above-mentioned distribution network load turns supplier's method, by obtaining the remote signalling value of each switching device in power distribution network from SCADA system,
The on off state of corresponding switching device can be obtained according to remote signalling value, the power network to prestore can be opened up according to the on off state of switching device
Flutter structure chart and carry out topological analysis, obtain the supply path of all connections；Then the extra of each supply path is obtained respectively to be available for
Load, supply path that load is negative value will be additionally available for as need to turn to supply path；Acquisition need to turn to turn to supply for the need in path
Family loads, and is searched according to topological structure of electric figure and need to turn to supply the attachable supply path of user load；According to the confession found
Power path it is extra be available for load generation need to turn for path turn supply load path；Last basis turns to supply to switch dress in load path
The on off state generation switch order put, switch order is sent to corresponding switching device and carries out load transfer.In this way, it can lead to
Crossing the automatic data for obtaining correlation and topological structure of electric figure being analyzed to obtain need to turn for path and corresponding turn for load road
Footpath, so as to realize supplying from turn for load, without manual operation, turn to supply efficiency high.
In one embodiment, step S121 to step S124 is included with reference to figure 2, step S120.
S121：Topological structure of electric figure is changed, the switching device that on off state is closure is changed to the connection that length is zero
Line.
By the way that the switching device of closure is changed into the connecting line that length is zero, it can eliminate and open in topological structure of electric figure
Close device.
S122：Topological structure of electric figure is changed, on off state is changed to cut-off point for the switching device disconnected.
Cut-off point is changed to by the switching device that will be switched off, uncharged branch road can be disappeared in topological structure of electric figure
Go.
Because switching device plays a part of electrical connection in power distribution network, can only be regarded for the switching device of closure
For connecting line, simplified electrical network topological structure, and then directly it is considered as open circuit for the switching device of disconnection, is not counted in topology.Due to
The quantity of switching device is relatively more in power distribution network, therefore, by that can be contracted after step S121 and step S123
The scale of minor scale power net topological structure.
S123：The model and length of each conducting line segment in topological structure of electric figure are obtained, is changed according to the model of each conducting line segment
Topological structure of electric figure, adjacent and model identical conducting line segment is merged into a conducting line segment, and record the conducting line segment of merging
Total length.
The model and length of conducting line segment can obtain from SCADA system, can be specifically from CIM (Computer
Integrated Manufacturing computer integrated manufacturing systems) obtain in file.Front and rear interconnection leads in same branch road
The model of line segment may be identical, it is also possible to different.By the way that model identical conducting line segment is merged, it can not only so reduce electricity
The scale of net topology structure, decrease the follow-up workload for calculating analysis.
S124：Using the balance nodes in the topological structure of electric figure after change as starting point, the path of all connections is searched for
Obtain supply path.
The node where main transformer or bus in balance nodes assignment power network, other branch roads are connected in balance nodes.It is logical
Cross and carry out topology search by starting point of balance nodes, existing supply path can be found.
In one embodiment, step S130 includes step (a1) to step (a3).
Step (a1)：The load of each user load in supply path is obtained, is calculated according to the load of each user load
The total of supply path supplies power.
The load of user load refers to the power required for user's normal work, can be acquired from SCADA system.
Total refer to for power of supply path meets all user load power to be provided on supply path, by calculating supply path
The load sum of upper each user load, it can obtain the total of supply path and supply power.
Step (a2)：The rated power of each supply path is obtained, and calculates rated power and total difference for supplying power, obtains volume
It is available for load outside.
The rated power of supply path can acquire from SCADA system.Calculate rated power with always for power it
Difference, specifically rated power is subtracted and always supplies power, is additionally available for load.
Step (a3)：Detect the extra of each supply path and be available for whether load is negative value, be negative value by additionally load is available for
Supply path conduct need to turn to supply path.
In one embodiment, step S151 to step S154 is included with reference to figure 3, step S150.
S151：According to the supply path found it is extra be available for load generation to turn can Zhuan Gong roads for a plurality of of path
Footpath.
It can turn to refer to available for the path for path progress load transfer need to be turned for path, can respectively turn to include turning for path
For user load.
S152：The active power and reactive power that can turn to supply each user load in path are obtained, and acquisition can Zhuan Gong roads
The line impedance and circuit rated voltage in footpath.
The active power and reactive power of each user load, and line impedance and circuit rated voltage for path can be turned
It can be obtained from SCADA system.
S153：According to the active power and reactive power that can turn for each user load in path, calculating can turn for path
Circuit active power and circuit reactive power.
It can turn to include to turn to supply user load for path.Can turn for path circuit active power specifically can by calculate can
Turn to obtain for the active power sum of all user loads on path, can turn specifically pass through meter for the circuit reactive power in path
Calculating can turn to obtain for the reactive power sum of all user loads on path.
S154：Being obtained according to line impedance, circuit rated voltage, circuit active power and circuit reactive power can Zhuan Gong road
The network loss in footpath.
Network loss refers to the power loss distributed during electrical energy transportation with form of thermal energy.In one embodiment, step S153 includes：
Wherein, δ is network loss, and P is circuit active power, and Q is circuit reactive power, and R is line impedance, and U is that circuit is specified
Voltage.
S155：Using loss minimization turn for path as need to turn for path turn supply load path.
The network loss that can respectively be turned for path by calculating simultaneously compares, using turning for path as turn supplying load road for loss minimization
Footpath, turning for selection is optimal path for load path, can improve the economy for turning the method for operation after supplying.
In one embodiment, after step S160, in addition to：The on off state of each switching device after acquisition load transfer,
Parameter information is generated according to the on off state of each switching device and sent to receiving terminal.
Parameter information is used for the on off state for informing each switching device.Receiving terminal can be the terminal of control centre, will join
Number information sends the terminal of control centre, in order to the control instruction that receiving terminal returns according to parameter information, performs corresponding behaviour
Make.For example, terminal obtains the on off state of each switching device according to parameter information and display, staff can be according to the letters of display
Breath analyses whether to need the state for adjusting some switching device, if then sending setting command by terminal.
By sending parameter information to receiving terminal, interacting for information can be realized with receiving terminal, is easy to protect between receiving terminal
The consistent of parameter is held, improves the monitoring reliability to power distribution network.
In one embodiment, after step S160, in addition to：After prefixed time interval, return and perform step S110.
Prefixed time interval can specifically be set as needed.In power distribution network running, the switch of each switching device
State may real-time change.Step S110 is performed by being returned after prefixed time interval, step S110 is performed extremely so as to circulate
Step S160, is circulated and power distribution network is tested and analyzed, and load transfer is carried out when finding and need to turn to supply path.In this way, can and
When from turn supply load, improve the stability and reliability of distribution network operation.
With reference to figure 4, the distribution network load in an embodiment turns to supply system, including on off state acquisition module 110, topology knot
Structure analysis module 120, supply path analysis module 130, it need to turn for path analysis module 140, turn to choose module for load path
150 and switch order sending module 160.
On off state acquisition module 110 is used for the remote signalling value that each switching device in power distribution network is obtained from SCADA system, according to
Remote signalling value obtains the on off state of corresponding switching device.
Analysis of Topological Structure module 120 is used to enter the topological structure of electric figure to prestore according to the on off state of switching device
Row topological analysis, obtain the supply path of all connections.
Supply path analysis module 130 is available for load for obtaining the extra of each supply path respectively, additionally will be available for bearing
Lotus need to turn to supply path for the supply path conduct of negative value.
It need to turn to be used to obtain for path analysis module 140 turn to turn to supply user load for the need in path, be opened up according to power network
Structure chart is flutterred to search and need to turn to supply the attachable supply path of user load.
Turn to choose module 150 for being available for load generation to turn according to the extra of the supply path found for load path
For path turn supply load path.
Switch order sending module 160 is used for basis and turns to supply the on off state generation switch of switching device in load path to refer to
Order, switch order is sent to corresponding switching device and carries out load transfer.
Above-mentioned distribution network load turns to supply system, is obtained by off state acquisition module 110 from SCADA system in power distribution network
The remote signalling value of each switching device, the on off state of corresponding switching device can be obtained according to remote signalling value；Analysis of Topological Structure module 120
Topological analysis can be carried out to the topological structure of electric figure to prestore according to the on off state of switching device, obtain the power supply of all connections
Path；Then supply path analysis module 130 obtains the extra of each supply path and is available for load respectively, is by load is additionally available for
The supply path conduct of negative value need to turn to supply path；Need to turn to obtain for path analysis module 140 need to turn to turn to supply for the need in path
Family loads, and is searched according to topological structure of electric figure and need to turn to supply the attachable supply path of user load；Turn to select for load path
Modulus block 150 according to the supply path found it is extra be available for load generation need to turn for path turn supply load path；Switch
Instruction sending module 160 sends out switch order according to turning to supply the on off state of switching device in load path to generate switch order
Switching device carries out load transfer corresponding to delivering to.In this way, can be by obtaining the data of correlation automatically to topological structure of electric figure
Being analyzed to obtain need to turn to supply load path for path and corresponding turn, so as to realize being supplied from turn for load, without artificial behaviour
Make, turn to supply efficiency high.
In one embodiment, Analysis of Topological Structure module 120 includes the first changing unit (not shown), the second changing unit
(not shown), the 3rd changing unit (not shown) and topology analysis units (not shown).
First changing unit is used to change topological structure of electric figure, and switching device of the on off state for closure is changed into length
The connecting line for being zero.
Second changing unit is used to change topological structure of electric figure, and on off state is changed to disconnect for the switching device disconnected
Point.
3rd changing unit is used for the model and length for obtaining each conducting line segment in topological structure of electric figure, according to each conducting line segment
Model change topological structure of electric figure, adjacent and model identical conducting line segment is merged into a conducting line segment, and record merging
Conducting line segment total length.
Topology analysis units are used for using the balance nodes in the topological structure of electric figure after change as starting point, and search is all
The path of connection obtains supply path.
By eliminating the switching device of disconnection in topological structure of electric figure, removing the branch road of power-off, and merge identical
The connected conducting line segment of model, with the scale of simplified electrical network topological structure follow-up calculate can be easy to analyze.
In one embodiment, supply path analysis module 130 includes power calculation unit (not shown), load calculating unit
(not shown) and it need to turn to supply path acquiring unit (not shown).
Power calculation unit is used for the load for obtaining each user load in supply path, according to the load of each user load
Amount calculates the total of supply path and supplies power.
Load calculating unit is used to obtain the rated power of each supply path, and calculate rated power with always for power it
Difference, additionally it is available for load.
It need to turn to be available for whether load is negative value for detecting the extra of each supply path for path acquiring unit, additionally will may be used
It need to turn to supply path for the supply path conduct of negative value for load.
In one embodiment, turn to choose module 150 including that can turn for path searching unit (not shown), number for load path
Chosen according to acquiring unit (not shown), line power computing unit (not shown), network loss acquiring unit (not shown) and path single
First (not shown).
It can turn to be used to be available for load generation to need Zhuan Gong roads according to the extra of the supply path found for path searching unit
The a plurality of of footpath turns to supply path.
Data capture unit is used to obtain the active power and reactive power that can turn to supply each user load in path, and obtains
Take the line impedance and circuit rated voltage that can turn for path.
Line power computing unit is used for according to the active power and reactive power that can turn for each user load in path, meter
Calculate the circuit active power and circuit reactive power that can turn for path.
Network loss acquiring unit is used for according to line impedance, circuit rated voltage, circuit active power and circuit reactive power
Obtain the network loss that can turn for path.
Path choose unit be used for using loss minimization turn for path as need to turn for path turn supply load path.
The network loss that can respectively be turned for path by calculating simultaneously compares, using turning for path as turn supplying load road for loss minimization
Footpath, turning for selection is optimal path for load path, can improve the economy for turning the method for operation after supplying.
In one embodiment, above-mentioned distribution network load turns also to include information sending module (not shown) for system, for obtaining
The on off state of each switching device after load transfer is taken, parameter information is generated according to the on off state of each switching device and sent extremely
Receiving terminal.
By sending parameter information to receiving terminal, interacting for information can be realized with receiving terminal, is easy to protect between receiving terminal
The consistent of parameter is held, improves the monitoring reliability to power distribution network.
In one embodiment, above-mentioned distribution network load turns also to include repeating detection module for system, for performing switch
After the prefixed time interval of instruction sending module 160, controlling switch state acquisition module 110 obtains from SCADA system again matches somebody with somebody
The remote signalling value of each switching device in power network, the on off state of corresponding switching device is obtained according to remote signalling value.In this way, circulation is to distribution
Net is tested and analyzed, and load transfer is carried out when finding and need to turn to supply path, can timely automated turn supply load, improve power distribution network
The stability and reliability of operation.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of distribution network load turns supplier's method, it is characterised in that including：
The remote signalling value of each switching device in power distribution network is obtained from SCADA system, corresponding switching device is obtained according to the remote signalling value
On off state；
Topological analysis is carried out to the topological structure of electric figure to prestore according to the on off state of the switching device, obtains all connections
Supply path；
The extra of each supply path is obtained respectively and is available for load, using the extra supply path for being available for load as negative value as need
Turn to supply path；
Obtain the need that need to turn to supply in path to turn to supply user load, being searched according to the topological structure of electric figure need to turn with described
For the attachable supply path of user load；
According to the supply path found it is extra be available for load generation it is described need to turn for path turn supply load path；
Switch order is generated according to the described turn of on off state for switching device in load path, by the switch order send to
Corresponding switching device carries out load transfer.
2. distribution network load according to claim 1 turns supplier's method, it is characterised in that described according to the switching device
On off state carries out topological analysis to the topological structure of electric figure to prestore, obtains the supply path of all connections, including：
The topological structure of electric figure is changed, the switching device that the on off state is closure is changed to the connection that length is zero
Line；
The topological structure of electric figure is changed, the on off state is changed to cut-off point for the switching device disconnected；
The model and length of each conducting line segment in the topological structure of electric figure are obtained, the electricity is changed according to the model of each conducting line segment
Net topology structure chart, adjacent and model identical conducting line segment is merged into a conducting line segment, and record the total of the conducting line segment of merging
Length；
Using the balance nodes in the topological structure of electric figure after change as starting point, the path for searching for all connections obtains the confession
Power path.
3. distribution network load according to claim 1 turns supplier's method, it is characterised in that described to obtain each supply path respectively
It is extra be available for load, using it is described it is extra be available for supply path that load is negative value as need to turn to supply path, including：
The load of each user load in the supply path is obtained, the power supply road is calculated according to the load of each user load
The total of footpath supplies power；
The rated power of each supply path is obtained, and calculates the rated power and total difference for supplying power, obtains the volume
It is available for load outside；
Detect the extra of each supply path and be available for whether load is negative value, by the extra supply path for being available for load as negative value
It need to turn to supply path as described.
4. distribution network load according to claim 1 turns supplier's method, it is characterised in that the power supply road that the basis is found
Footpath it is extra be available for load generation it is described need to turn for path turn supply load path, including：
Extra according to the supply path found is available for load generation is described need to turn to turn to supply path for a plurality of of path；
The active power and reactive power for each user load in path can be turned described in acquisition, and can turn to supply path described in acquisition
Line impedance and circuit rated voltage；
According to the active power and reactive power for turning to supply each user load in path, the line for path can be turned described in calculating
Road active power and circuit reactive power；
Obtained according to the line impedance, the circuit rated voltage, the circuit active power and the circuit reactive power
The network loss turned for path；
Using loss minimization turn for path as it is described need to turn for path turn supply load path.
5. distribution network load according to claim 1 turns supplier's method, it is characterised in that turns to supply load road described in the basis
The on off state generation switch order of switching device, the switch order is sent to corresponding switching device and carries out load in footpath
Turn after supplying, in addition to：
The on off state of each switching device after acquisition load transfer, parameter information is generated simultaneously according to the on off state of each switching device
Send to receiving terminal.
6. a kind of distribution network load turns to supply system, it is characterised in that including：
On off state acquisition module, for obtaining the remote signalling value of each switching device in power distribution network from SCADA system, according to described distant
Letter value obtains the on off state of corresponding switching device；
Analysis of Topological Structure module, the topological structure of electric figure to prestore is carried out for the on off state according to the switching device
Topological analysis, obtain the supply path of all connections；
Supply path analysis module, load is available for for obtaining the extra of each supply path respectively, additionally load is available for by described
It need to turn to supply path for the supply path conduct of negative value；
It need to turn to supply path analysis module, turn to supply user load for obtaining the need that need to turn to supply in path, according to the power network
Topology diagram is searched need to turn to supply the attachable supply path of user load with described；
Turn to choose module for load path, for being available for load generation is described need to turn to supply according to the extra of the supply path found
Path turn supply load path；
Switch order sending module, for being referred to according to the on off state generation switch for turning to supply switching device in load path
Order, the switch order is sent to corresponding switching device and carries out load transfer.
7. distribution network load according to claim 6 turns to supply system, it is characterised in that the Analysis of Topological Structure module bag
Include：
First changing unit, for changing the topological structure of electric figure, switching device of the on off state for closure is changed
The connecting line for being zero for length；
Second changing unit, for changing the topological structure of electric figure, the on off state is changed for the switching device disconnected
For cut-off point；
3rd changing unit, for obtaining the model and length of each conducting line segment in the topological structure of electric figure, according to each wire
The model of section changes the topological structure of electric figure, adjacent and model identical conducting line segment is merged into a conducting line segment, and remember
Record the total length of the conducting line segment merged；
Topology analysis units, for using the balance nodes in the topological structure of electric figure after change as starting point, searching for all companies
Logical path obtains the supply path.
8. distribution network load according to claim 6 turns to supply system, it is characterised in that the supply path analysis module bag
Include：
Power calculation unit, for obtaining the load of each user load in the supply path, according to the negative of each user load
Lotus amount calculates the total of the supply path and supplies power；
Load calculating unit, for obtaining the rated power of each supply path, and calculate the rated power and always supply work(with described
The difference of rate, obtain described being additionally available for load；
It need to turn to supply path acquiring unit, be available for whether load is negative value for detecting the extra of each supply path, will be described extra
It is available for the supply path that load is negative value to turn to supply path as described.
9. distribution network load according to claim 6 turns to supply system, it is characterised in that described turn is chosen mould for load path
Block includes：
It can turn to supply path searching unit, for being available for load generation is described to need Zhuan Gong roads according to the extra of the supply path found
The a plurality of of footpath turns to supply path；
Data capture unit, for obtaining the active power and reactive power that can turn to supply each user load in path, and
The line impedance and circuit rated voltage for path can be turned described in acquisition；
Line power computing unit, for active power and reactive power for each user load in path can be turned according to,
The circuit active power and circuit reactive power for path can be turned described in calculating；
Network loss acquiring unit, for according to the line impedance, the circuit rated voltage, the circuit active power and described
Circuit reactive power can turn to supply the network loss in path described in obtaining；
Path choose unit, for using loss minimization turn for path as it is described need to turn for path turn supply load path.
10. distribution network load according to claim 6 turns to supply system, it is characterised in that also including information sending module, uses
The on off state of each switching device after load transfer is obtained, it is concurrent that parameter information is generated according to the on off state of each switching device
Deliver to receiving terminal.
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