CN106340872B - The network structure method and system for planning of power network - Google Patents
The network structure method and system for planning of power network Download PDFInfo
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- CN106340872B CN106340872B CN201610861647.2A CN201610861647A CN106340872B CN 106340872 B CN106340872 B CN 106340872B CN 201610861647 A CN201610861647 A CN 201610861647A CN 106340872 B CN106340872 B CN 106340872B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The present invention relates to a kind of network structure method and system for planning of power network,Obtain the area data of predeterminable area,Interconnection including predeterminable area,The line length of interconnection,The node and the active power of node being connected with interconnection,Reactive power and voltage,According to the active power of node,The electric current that reactive power and voltage calculate node are produced on correspondence interconnection,According to the electric current that node is produced on correspondence interconnection,With megawatt kilometer that the line length of correspondence interconnection calculates the node,The initial share the expenses of megawatt kilometer calculate node according to node,The income of the initial share the expenses calculate node region according to node,If the income ratio in two regions is unsatisfactory for the first preset ratio,Then the income to two regions is modified,Obtain revised income,Be added to newly-increased node in power network by the income according to each region,To update the structure of power network,So as to rationally accurately plan the network structure of power network.
Description
Technical field
The present invention relates to grid power transmission price field, the network structure planing method of more particularly to a kind of power network and it is
System.
Background technology
Transmission Cost is mainly used in recouping the investment and paying operation, management and labour cost, to maintain transmission system good
Operation and development.Transmission Pricing is the key link in electricity market, is also important of China's current power market reform
Business, the whether reasonable of Transmission Pricing not only influences the survival and development of enterprises of managing electric wire netting, and also contributes to the effect of electricity power enterprise
Benefit and the interests of terminal user.Rational transmission price is that electricity market is fair, just, safe and reliable operation guarantee.
The power system reform of a new round, general thought is " keeping a grip on centre, decontrol two ", the propulsion marketization.Thus may be used
See, under new power market reform background, study rational Transmission Pricing method and be particularly important.And region interconnection into
Sharing for this, is a part and parcel in Transmission Pricing, especially in the case where there are numerous region interconnections in China, how to be closed
Manage and the accurate network structure to power network carries out planning and is particularly important.
The content of the invention
Based on this, it is necessary to regarding to the issue above, there is provided the network structure planing method of a kind of reasonable and accurate power network
And system.
A kind of network structure planing method of power network, comprises the following steps：
The area data of predeterminable area is obtained, the area data of the predeterminable area includes the contact of the predeterminable area
The node and the active power of the node of the connection of line, the line length of the interconnection and the interconnection, reactive power and
Voltage；
Active power, reactive power and voltage according to the node calculate what the node was produced on correspondence interconnection
Electric current；
Line length according to the electric current that the node is produced on correspondence interconnection, and correspondence interconnection calculates the section
Megawatt kilometer of point；
Megawatt kilometer according to the node calculates the initial share the expenses of the node；
Initial share the expenses according to the node calculates the income of the node region, if two incomes in region
Than being unsatisfactory for the first preset ratio, then the income to two regions of correspondence is modified, and obtains revised income；Wherein, institute
The income for stating region is the initial share the expenses sum of all nodes in the region；
Newly-increased node is obtained, according to each revised income in region and the newly-increased node, the net of power network is planned
Network structure.
A kind of network structure planning system of power network, including：
Region query module, the area data for obtaining predeterminable area, the area data bag of the predeterminable area
Include the node and the node of the interconnection, the line length of the interconnection and interconnection connection of the predeterminable area
Active power, reactive power and voltage；
Current calculation module, calculates the node and exists for the active power according to the node, reactive power and voltage
The electric current produced on correspondence interconnection；
Megawatt kilometer computing module, for the electric current produced on correspondence interconnection according to the node, and correspondence contact
The line length of line calculates megawatt kilometer of the node；
Initial share the expenses computing module, shares for calculating the initial of the node according to megawatt kilometer of the node
Expense；
Region income correcting module, for calculating the node region according to the initial share the expenses of the node
Income, if the income ratio in two regions is unsatisfactory for the first preset ratio, the income to two regions of correspondence is modified, and obtains
Revised income；Wherein, the income in the region is the initial share the expenses sum of all nodes in the region；
Planning module, for obtaining newly-increased node, according to each revised income in region and the newly-increased node,
Plan the network structure of power network.
The network structure method and system for planning of above-mentioned power network, by obtaining the area data of predeterminable area, predeterminable area
The interconnection of area data including predeterminable area, the node of the line length of interconnection and interconnection connection and node have
Work(power, reactive power and voltage, the active power, reactive power and voltage calculate node according to node are on correspondence interconnection
The electric current of generation, the line length according to the electric current that node is produced on correspondence interconnection, and correspondence interconnection calculates the section
Megawatt kilometer of point, the initial share the expenses of megawatt kilometer calculate node according to node, according to the initial share the expenses of node
The income of calculate node region, if the income ratio in two regions is unsatisfactory for the first preset ratio, to two regions of correspondence
Income be modified, obtain revised income, be added to newly-increased node in power network by the income according to each region, with plan
The network structure of power network, is, according to each region income, newly-increased node to be planned into power network, to update the structure of power network, by
It is not only rationally but also accurate in each region income, can so be conducive to planning that newly-increased node is connected to ensure with the node in which region
Newly-increased node economic benefit, so that, newly-increased node is reasonably planned to power network.
Brief description of the drawings
Fig. 1 is the flow chart of the network structure planing method of power network in an embodiment；
Fig. 2 is the structure chart of the network structure planning system of power network in an embodiment.
Specific embodiment
In one embodiment, as shown in figure 1, a kind of network structure planing method of power network, comprises the following steps：
S110：The area data of predeterminable area is obtained, the area data of predeterminable area includes the interconnection of predeterminable area, connection
The node of line length and the interconnection connection of winding thread and the active power of node, reactive power and voltage.
Interconnection refers to the special wire that anastomosis is played between power plant and power network in power system, that is to say, that logical
The electric energy that crossing it can send power plant is sent in the middle of power network, it is also possible to which the electric energy on power network is transferred back into power plant, because
This turns into " interconnection ".Interconnection can connect two power systems, two inter-provincial power networks, even two transformer stations, two
Power distribution station, gives full play to the hair power supply capacity of both sides, promotes most optimum distribution of resources.
China's electric network composition is complicated, there is numerous region interconnections, and the scope of predeterminable area is not unique, can be each
Province, each city, each town etc. are divided on demand.
Specifically, step S110 is additionally operable to be obtained from default file the circuit network structure of predeterminable area, according to circuit
Network structure obtains the active of interconnection, the node of the line length of interconnection and interconnection connection and the node of predeterminable area
Power, reactive power and voltage.
Specifically, be stored with the various important informations of power network in default file, can be pre- by searching in default file
If the circuit network structure in region, so as to get all of interconnection in predeterminable area, the line length of interconnection and connection
The all of node of winding thread direct or indirect connection and the active power of node, reactive power and voltage.
S120：The electricity that active power, reactive power and voltage calculate node according to node are produced on correspondence interconnection
Stream.In one embodiment, step S120 includes step 122 and step 124.
Step 122：The equivalent current of active power, reactive power and voltage calculate node according to node, specially：
Ii=(Pi+Qij)/Vi；
Wherein Pi、Qi、ViRespectively the active power of node i, reactive power and voltage, j are plural number, IiFor node etc.
Effect electric current.
Step 124：The electric current that the equivalent current of calculate node is produced on correspondence interconnection, specially：
Imn,i=ymn(Zmi-Zni)Ii；
Wherein ymnAdmittance, Z for interconnection mnmiTransfger impedance, Z for node m to node iniFor node n arrives node i
Transfger impedance, IiEquivalent current, I for nodemn,iFor the electric current that the equivalent current of node is produced on correspondence interconnection.
Specifically, the admittance of circuit is the general designation of conductance and susceptance, and admittance is defined as falling for impedance in power electronics
Number, as impedance, admittance is a plural number.Specifically, the definition of transfger impedance is only to retain hair in complicated electric power system
Motor powered gesture node (comprising infinitely great power generatrix) and short dot, by networked examination eliminate other intermediate nodes (or
Contact node), a network is finally obtained, in this network, the line between each power supply can be omitted, think the electric current in line
It is the exchanging electric current between power supply, it is unrelated with short circuit current.Material is thus formed a Radiation network centered on short dot,
Each radiation branch is connected through an impedance (title transfger impedance) containing only a power supply with short dot.
S130：According to the electric current that node is produced on interconnection is corresponded to, and the line length calculate node for corresponding to interconnection
Megawatt kilometer.In one embodiment, step S130 includes step 132 and step 134.
Step 132：According to the electric current that node is produced on correspondence interconnection, what calculate node was produced on correspondence interconnection
Power, specially：
Smn,i=Vm(Imn,i)*
Wherein VmVoltage, I for node mmn,iFor electric current, S that node is produced on correspondence interconnectionmn,iIt is node right
Answer the power produced on interconnection.
Step 134：Power and the product of the line length of correspondence interconnection that calculate node is produced on correspondence interconnection
Summation, obtain megawatt kilometer of node, specially:
mi=∑ Smn,i×lmn
Wherein, lmnLength, S for circuit mnmn,iFor power, m that node is produced on correspondence interconnectioniIt is the million of node
Watt kilometer.
S140：The initial share the expenses of megawatt kilometer calculate node according to node.In one embodiment, step S140
Including：Megawatt kilometer of node and predetermined system are extended into coefficient and preset security factor is multiplied, obtained the initial of node and share
Expense, specially：
TA,j=mA,j×E×S
TB,k=mB,k×E×S
Wherein, TA,jIt is the initial share the expenses of region A interior joints j, mA,jIt is megawatt kilometer of node j, TB,kIt is region B
The initial share the expenses of interior joint k, mB,kIt is megawatt kilometer of node k, E is that system extends coefficient, and S is factor of safety.
Specifically, system enlarging coefficient E reflects the expense of unit length Typical Route, and factor of safety S reflects system to peace
The cost of the system redundancy capacity that the requirement of full nargin is caused.
S150：The income of the initial share the expenses calculate node region according to node, if two income ratios in region
The first preset ratio is unsatisfactory for, then the income to two regions of correspondence is modified, and obtains revised income；Wherein, it is described
The income in region is the initial share the expenses sum of all nodes in the region.In one embodiment, step S150 includes
Step 152, step 154 and step 156.
Step 152：Modifying factor is set, the income in two regions of correspondence is modified respectively according to modifying factor.
When two incomes in region are than being unsatisfactory for the first preset ratio, it is necessary to be repaiied to the income in two regions of correspondence
Just, so that the reasonable fairly and accurately of the share the expenses in each region.
Step 154：Income according to a revised region accounts for the ratio of the total revenue in revised two regions and the
The equal condition of two preset ratios, calculates the value of modifying factor, specially：
Wherein RCT,AIt is the revised income obtained from a-quadrant, mA,jIt is the marginal megawatt kilometer of node j, PjIt is node j
Active power, RCT,BIt is the revised income obtained from B regions, mB,kIt is the marginal megawatt kilometer of node k, C is modifying factor
Son, PkIt is the active power of node k, p is the second preset ratio that the revised income in a-quadrant accounts for total revenue, and E is extended for system
Coefficient, S is factor of safety.
By introducing modifying factor, and total receipts in revised two regions are accounted for according to the income in a revised region
The beneficial ratio condition equal with the second preset ratio, calculates the value of modifying factor, that is to say, that according to the modifying factor for obtaining
Value the income in two regions of correspondence is modified respectively after, meet the benefit ratios that two regions obtain.
Step 156：According to the value of modifying factor, the income to two regions of correspondence is modified respectively, after being corrected
Income.
After the value for obtaining modifying factor, according to the value of modifying factor, the income to two regions of correspondence is repaiied respectively
Just, revised income is obtained, so that the amendment to region income is realized, so that each region income is more rationally and accurate.
In one embodiment, after the income to corresponding region is modified, the income of corresponding region is shared into area
In domain on each node, specially：
TCT,A,j=(mA,j+C)×E×S/1000
TCT,B,k=(mB,k-C)×E×S/1000
Wherein, TCT,A,jIt is the expense that the j node interconnections in a-quadrant are shared, mA,jIt is megawatt kilometer of node j, TCT,B,k
It is the expense that the k node interconnections in B regions are shared, mB,kIt is megawatt kilometer of node k, C is modifying factor.
S170：Newly-increased node is obtained, according to the revised income in each region and newly-increased node, the network knot of power network is planned
Structure.
After the income to each region determines, when there is newly-increased node to need to be added in power network, in order to ensure newly-increased section
The economic benefit of point and the reasonability of power network, are realized to electricity by the way that newly-increased node is added in power network according to each region income
That nets makes rational planning for.
The network structure planing method of above-mentioned power network, by obtaining the area data of predeterminable area, the region of predeterminable area
The interconnection of data including predeterminable area, the active power of the node of the line length of interconnection and interconnection connection and node,
Reactive power and voltage, what active power, reactive power and voltage calculate node according to node were produced on correspondence interconnection
Electric current, the line length according to the electric current that node is produced on correspondence interconnection, and correspondence interconnection calculates the million of the node
Watt kilometer, the initial share the expenses of megawatt kilometer calculate node according to node, the initial share the expenses according to node calculates section
The income of point region, if the income ratio in two regions is unsatisfactory for the first preset ratio, to two incomes in region of correspondence
It is modified, obtains revised income, be added to newly-increased node in power network by the income according to each region, plans power network
Network structure, is, according to each region income, newly-increased node to be planned into power network, to update the structure of power network, due to each area
Domain income is not only rationally but also accurate, can so be conducive to planning that newly-increased node is connected to ensure newly-increased section with the node in which region
Point economic benefit, so that, newly-increased node is reasonably planned to power network.
In one embodiment, as shown in Fig. 2 a kind of network structure planning system of power network, including region query
Module 110, current calculation module 120, megawatt kilometer computing module 130, initial share the expenses computing module 140, region income
Correcting module 150 and planning module 160.
In one embodiment, region query module 110 is used to obtain the area data of predeterminable area, predeterminable area
The interconnection of area data including predeterminable area, the node of the line length of interconnection and interconnection connection and node have
Work(power, reactive power and voltage.
Interconnection refers to the special wire that anastomosis is played between power plant and power network in power system, that is to say, that logical
The electric energy that crossing it can send power plant is sent in the middle of power network, it is also possible to which the electric energy on power network is transferred back into power plant, because
This turns into " interconnection ".Interconnection can connect two power systems, two inter-provincial power networks, even two transformer stations, two
Power distribution station, gives full play to the hair power supply capacity of both sides, promotes most optimum distribution of resources.
China's electric network composition is complicated, there is numerous region interconnections, and the scope of predeterminable area is not unique, can be each
Province, each city, each town etc. are divided on demand.
Specifically, region query module 110 is used to be obtained from default file the circuit network structure of predeterminable area,
Node and section that interconnection, the line length of interconnection and the interconnection for obtaining predeterminable area according to circuit network structure are connected
Active power, reactive power and the voltage put.
Specifically, be stored with the various important informations of power network in default file, can be pre- by searching in default file
If the circuit network structure in region, so as to get all of interconnection in predeterminable area, the line length of interconnection and connection
The all of node of winding thread direct or indirect connection and the active power of node, reactive power and voltage.
In one embodiment, current calculation module 120 is for the active power according to node, reactive power and potentiometer
The electric current that operator node is produced on correspondence interconnection.In one embodiment, current calculation module 120 is calculated including equivalent current
Unit and current calculation unit.
Equivalent current computing unit is used for the equivalent electric of the active power, reactive power and voltage calculate node according to node
Stream, specially：
Ii=(Pi+Qij)/Vi；
Wherein Pi、Qi、ViRespectively the active power of node i, reactive power and voltage, j are plural number, IiFor node etc.
Effect electric current.
Current calculation unit is used for the electric current that the equivalent current of calculate node is produced on correspondence interconnection, specially：
Imn,i=ymn(Zmi-Zni)Ii；
Wherein ymnAdmittance, Z for interconnection mnmiTransfger impedance, Z for node m to node iniFor node n arrives node i
Transfger impedance, IiEquivalent current, I for nodemn,iFor the electric current that the equivalent current of node is produced on correspondence interconnection.
In one embodiment, megawatt kilometer computing module 130 is used for the electricity produced on correspondence interconnection according to node
Stream, and correspond to megawatt kilometer of the line length calculate node of interconnection.In one embodiment, megawatt kilometer computing module
130 include power calculation unit and megawatt kilometer computing unit.
Power calculation unit is used for the electric current produced on correspondence interconnection according to node, and calculate node is in correspondence interconnection
The power of upper generation, specially：
Smn,i=Vm(Imn,i)*
Wherein VmVoltage, I for node mmn,iFor electric current, S that node is produced on correspondence interconnectionmn,iIt is node right
Answer the power produced on interconnection.
Megawatt kilometer computing unit is used for the line of the power that calculate node produces on correspondence interconnection and correspondence interconnection
The summation of the product of road length, obtains megawatt kilometer of node, specially:
mi=∑ Smn,i×lmn
Wherein, lmnLength, S for circuit mnmn,iFor power, m that node is produced on correspondence interconnectioniIt is the million of node
Watt kilometer.
In one embodiment, initial share the expenses computing module 140, megawatt kilometer calculate node according to node just
Beginning share the expenses.In one embodiment, initial share the expenses computing module 140 includes initial share the expenses computing unit.
Initial share the expenses computing unit is used to for megawatt kilometer of node and predetermined system to extend coefficient and preset security
Factor is multiplied, and obtains the initial share the expenses of node, specially：
TA,j=mA,j×E×S
TB,k=mB,k×E×S
Wherein, TA,jIt is the initial share the expenses of region A interior joints j, mA,jIt is megawatt kilometer of node j, TB,kIt is region B
The initial share the expenses of interior joint k, mB,kIt is megawatt kilometer of node k, E is that system extends coefficient, and S is factor of safety.
Specifically, system enlarging coefficient E reflects the expense of unit length Typical Route, and factor of safety S reflects system to peace
The cost of the system redundancy capacity that the requirement of full nargin is caused.
In one embodiment, region income correcting module 150, for the initial share the expenses calculate node according to node
The income of region, if the income ratio in two regions is unsatisfactory for the first preset ratio, the income to two regions of correspondence is entered
Row amendment, obtains revised income；Wherein, the income in region is the initial share the expenses sum of all nodes in region.Tool
Body ground, region income correcting module 150 includes amending unit, modifying factor computing unit and region income amending unit.
Amending unit is used to set modifying factor, according to modifying factor to the node region at region interconnection two ends
Income is modified respectively.
When two incomes in region are than being unsatisfactory for the first preset ratio, it is necessary to be repaiied to the income in two regions of correspondence
Just, so that the reasonable fairly and accurately of the share the expenses in each region.
Modifying factor computing unit is used to be accounted for according to the income in a revised region total receipts in revised two regions
The beneficial ratio condition equal with the second preset ratio, calculates the value of modifying factor, specially：
Wherein RCT,AIt is the revised income obtained from a-quadrant, mA,jIt is megawatt kilometer of node j, PjIt is having for node j
Work(power, RCT,BIt is the revised income obtained from B regions, mB,kIt is megawatt kilometer of node k, PkIt is the wattful power of node k
Rate, C is modifying factor, and p is that a-quadrant is revised takes in the second preset ratio for accounting for total income, and E is that system extends coefficient, and S is
Factor of safety.
By introducing modifying factor and the total revenue in revised two regions being accounted for according to the income in a revised region
The ratio condition equal with the second preset ratio, calculate the value of modifying factor, that is to say, that according to the modifying factor for obtaining
After value is modified respectively to the income in two regions of correspondence, the benefit ratio that two regions obtain is met.
Region income amending unit is used for the value according to modifying factor, and the income to two regions of correspondence is repaiied respectively
Just, revised income is obtained.
After the value for obtaining modifying factor, according to the value of modifying factor, the income to two regions of correspondence is repaiied respectively
Just, revised income is obtained, so that the amendment to region income is realized, so that each region income is more rationally and accurate.
In one embodiment, the system also includes region income allocation module, for entering in the income to corresponding region
After row amendment, the income in region is shared in region on each node, specially：
TCT,A,j=(mA,j+C)×E×S/1000
TCT,B,k=(mB,k-C)×E×S/1000
Wherein, TCT,A,jIt is the expense that the j node interconnections in a-quadrant are shared, mA,jIt is megawatt kilometer of node j, TCT,B,k
It is the expense that the k node interconnections in B regions are shared, mB,kIt is megawatt kilometer of node k, C is modifying factor.
In one embodiment, planning module 160 is used to obtain newly-increased node, according to the revised income in each region and
Newly-increased node, plans the network structure of power network.
After the income to each region determines, when there is newly-increased node to need to be added in power network, in order to ensure newly-increased section
The economic benefit of point and the reasonability of power network, are realized to electricity by the way that newly-increased node is added in power network according to each region income
That nets makes rational planning for.
The network structure planning system of above-mentioned power network, region query module 110 is used to obtain the region of predeterminable area
Data, the area data of predeterminable area includes the section of the interconnection of predeterminable area, the line length of interconnection and interconnection connection
Point and the active power of node, reactive power and voltage, current calculation module 120 are used for active power according to node, idle
The electric current that power and voltage calculate node are produced on correspondence interconnection, megawatt kilometer computing module 130 is used to be existed according to node
The electric current produced on interconnection is corresponded to, and correspondingly the line length of interconnection calculates megawatt kilometer of the node, initially shares
Expense computing module 140 is used for the initial share the expenses of megawatt kilometer calculate node according to node, region income correcting module
150 incomes for being used for the initial share the expenses calculate node region according to node, if the income ratio in two regions is unsatisfactory for
First preset ratio, then be modified to the income for corresponding to two regions, obtains revised income, and planning module 160 is used for
Be added to newly-increased node in power network by the income according to each region, is to be received according to each region to plan the network structure of power network
Benefit, newly-increased node is planned into power network, to update the structure of power network, because each region income is not only rationally but also accurate, so may be used
Be conducive to planning that newly-increased node is connected with the node in which region to ensure newly-increased node economic benefit, so that, make newly-increased section
Point is reasonably planned to power network.
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 of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming 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 protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. the network structure planing method of a kind of power network, it is characterised in that comprise the following steps：
The area data of predeterminable area is obtained, the area data of the predeterminable area includes interconnection, the institute of the predeterminable area
State the node of line length and the interconnection connection of interconnection and the active power of the node, reactive power and voltage；
Active power, reactive power and voltage according to the node calculate the electricity that the node is produced on correspondence interconnection
Stream；
Line length according to the electric current that the node is produced on correspondence interconnection, and correspondence interconnection calculates the node
Megawatt kilometer；
Megawatt kilometer according to the node calculates the initial share the expenses of the node；
Initial share the expenses according to the node calculates the income of the node region, if two income ratios in region are not
Meet the first preset ratio, then the income to two regions of correspondence is modified, and obtains revised income；Wherein, the area
The income in domain is the initial share the expenses sum of all nodes in the region；
Newly-increased node is obtained, according to each revised income in region and the newly-increased node, the network knot of power network is planned
Structure；
The electric current produced on correspondence interconnection according to the node, and the line length of correspondence interconnection calculates the section
The step of megawatt kilometer of point, including：
According to the electric current that the node is produced on correspondence interconnection, the work(that the node is produced on correspondence interconnection is calculated
Rate；
Power and the summation of the product of the line length of correspondence interconnection that the node is produced on correspondence interconnection are calculated, is obtained
To megawatt kilometer of the node；
The income that the node region is calculated according to the initial share the expenses of the node, if two incomes in region
Than being unsatisfactory for the first preset ratio, then the income to two regions of correspondence is modified, the step of obtain revised income, bag
Include：
Modifying factor is set, the income in two regions of correspondence is modified respectively according to the modifying factor；
Income according to a revised region accounts for the ratio and the second preset ratio phase of the total revenue in revised two regions
Deng condition, calculate the value of the modifying factor；
According to the value of the modifying factor, the income to two regions of correspondence is modified respectively, obtains revised income.
2. the network structure planing method of power network according to claim 1, it is characterised in that described according to the node
The step of active power, reactive power and voltage calculate the electric current that the node is produced on correspondence interconnection, including：
Active power, reactive power and voltage according to the node calculate the equivalent current of the node；
Calculate the electric current that the equivalent current of the node is produced on correspondence interconnection.
3. the network structure planing method of power network according to claim 1, it is characterised in that described according to the node
The step of megawatt kilometer calculates the initial share the expenses of the node, including：
Megawatt kilometer of the node and predetermined system are extended into coefficient and preset security factor is multiplied, obtain the first of the node
Beginning share the expenses.
4. the network structure planning system of a kind of power network, it is characterised in that including：
Region query module, the area data for obtaining predeterminable area, the area data of the predeterminable area includes institute
State the node of the interconnection of predeterminable area, the line length of the interconnection and the interconnection connection and having for the node
Work(power, reactive power and voltage；
Current calculation module, the node is calculated in correspondence for the active power according to the node, reactive power and voltage
The electric current produced on interconnection；
Megawatt kilometer computing module, for the electric current produced on correspondence interconnection according to the node, and correspondence interconnection
Line length calculates megawatt kilometer of the node；
Initial share the expenses computing module, expense is shared for calculating the initial of the node according to megawatt kilometer of the node
With；
Region income correcting module, the receipts for calculating the node region according to the initial share the expenses of the node
Benefit, if the income ratio in two regions is unsatisfactory for the first preset ratio, the income to two regions of correspondence is modified, and is repaiied
Income after just；Wherein, the income in the region is the initial share the expenses sum of all nodes in the region；
Planning module, for obtaining newly-increased node, according to each revised income in region and the newly-increased node, planning
The network structure of power network；
Described megawatt of kilometer computing module includes:
Power calculation unit, for the electric current produced on correspondence interconnection according to the node, calculates the node in correspondence
The power produced on interconnection；
Megawatt kilometer computing unit, the line for calculating power that the node produces on correspondence interconnection and correspondence interconnection
The summation of the product of road length, obtains megawatt kilometer of the node；
The region income correcting module, including：
Amending unit, for setting modifying factor, repaiies respectively according to the modifying factor to the income in two regions of correspondence
Just；
Modifying factor computing unit, the total revenue for accounting for according to the income in a revised region revised two regions
The ratio condition equal with the second preset ratio, calculates the value of the modifying factor；
Region income amending unit, for the value according to the modifying factor, the income to two regions of correspondence is repaiied respectively
Just, revised income is obtained.
5. the network structure planning system of power network according to claim 4, it is characterised in that the current calculation module bag
Include:
Equivalent current computing unit, the node is calculated for the active power according to the node, reactive power and voltage
Equivalent current；
Current calculation unit, the electric current that the equivalent current for calculating the node is produced on correspondence interconnection.
6. the network structure planning system of power network according to claim 4, it is characterised in that the initial share the expenses meter
Module is calculated, including：
Initial share the expenses computing unit, for megawatt kilometer of the node and predetermined system to be extended into coefficient and preset security
Factor is multiplied and obtains the initial share the expenses of the node.
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