CN105976085A - Project investment calculation method based on typical power supply mode - Google Patents
Project investment calculation method based on typical power supply mode Download PDFInfo
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Abstract
The invention relates to a project investment calculation method based on a typical power supply mode, comprising the following steps: (1) building a typical power supply mode scheme library; (2) building a typical power supply mode project investment model; (3) setting the boundary condition parameters of the typical power supply mode project investment model; (4) selecting an only typical power supply mode; and (5) carrying out calculation based on the typical power supply mode project investment model, calculating the investment Ca in a new project of a distribution network under the typical power supply mode if a power supply region is a new region, and if a power supply region is a reconstructed region, comparing the power supply reliability RS11 of the power supply region in the status quo year with the power supply reliability RS12 formulated in the planning goal of a typical power supply region in the planning year, and then, calculating the distribution network reconstruction investment Ca under the typical power supply mode. The method is conductive to the standardization, quantitative evaluation and normalization of power grid construction in each power supply region.
Description
Technical field
The present invention relates to a kind of project investment computational methods, especially with regard to a kind of use in electrical network field based on allusion quotation
The project investment computational methods of type powering mode.
Background technology
At present, along with the fast development of national economy, various places power load increases continuously, complex business commerce and trade district, highly dense
Emerging in an endless stream in the economic development zone of degree residential area and Various Functions, power supply reliability demand is also tended to various by users at different levels
Changing, under the need for electricity situation with the dual growth of reliability requirement, planning and the retrofit work project investment of power distribution network face
Immense pressure, long-term extensive high-order investment is by hard to carry on.Typical case's powering mode relates to load density, electric pressure, rack
Structure, reliability and economy, the beneficially wiring of specification power distribution network, it is achieved distribution network construction standardization, modularity, have capital construction
Reduced investment, operating cost are low, leave the features such as room for development.Power distribution network powering mode is chosen and Investment Allocation, becomes power supply enterprise
One of major issue that industry faces.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of project investment calculating side based on typical case's powering mode
Method, it is chosen for power distribution network powering mode provides important references to be worth with Investment Allocation.
For achieving the above object, the present invention takes techniques below scheme: a kind of project investment based on typical case's powering mode
Computational methods, it is characterised in that it comprises the following steps: 1) set up typical case's powering mode scheme base, typical case's powering mode scheme base
It is made up of basic module group and powering mode scheme group；2) typical case's powering mode project investment model is set up；3) typical case is powered
The boundary condition parameter of schema entry investment model is configured, and boundary condition parameter includes power distribution network parameter, power supply reliability
With load density scope；4) unique typical case's powering mode is chosen；From 28 kinds of typical case's power supply moulds of typical case's powering mode scheme base
In formula, select one or more typical case's powering modes, as the powering mode of planning region；Calculate selected typical case's power supply
The specific load investment value Ce of pattern, if the result selected is two or more, with typical case's powering mode project investment model respectively
Calculate the specific load investment value of selected several modes, that typical case's powering mode that contrast Ce value is minimum, it is selected unique
Typical powering mode and the specific load investment value Ce of correspondence；5) typical case's powering mode project investment model is calculated；
(1) determine whether newly-built region, if newly-built region, then enter step (2), otherwise for transformation region, enter step
(3)；(2) if power supply area is newly-built region, under typical case's powering mode, the computing formula of power distribution network grassroot project investment Ca is:
Ca=σ * S*Ce, wherein, Ca is the newly-built investment of power distribution network under typical case's powering mode；σ is that the load in the planning year of power supply area is close
Degree, unit is MW/km2；S is the powering area in power supply area planning year, and unit is km2；Ce is the unit of selected powering mode
Load investment value, unit is ten thousand yuan/MW；(3) if power supply area is transformation region, then the confession in this power supply area present situation year is needed
Electricity reliability RS11, with the power supply reliability RS1 of typical case's power supply area planning year object of planning formulation2Compare；If RS11>
RS12, then: Ca=σ2*S2*Ce2—σ1*S1*Ce1If, RS11<RS12, then: Ca=σ2*S2*Ce2—1/K*σ1*S1*Ce1, its
In, Ca is distribution network transform investment under typical case's powering mode；σ1For the load density in the present situation year of power supply area, unit is MW/
km2；σ2For the load density in the planning year of power supply area, unit is MW/km2；S1For the powering area in power supply area present situation year,
Unit is km2；S2For the powering area in power supply area planning year, unit is km2；Ce1For under selected powering mode, present situation year
Specific load investment value under load density, unit is ten thousand yuan/MW；Ce2For under selected powering mode, plan year load density
Under specific load investment value, unit is ten thousand yuan/MW；K is correction factor.
Preferably, described step 1) in, described basic module group by contact potential series module group, standardization infrastructure modules group and
Power distribution automation module group is constituted；Described contact potential series module group is different contact potential series combination；Described standardization facility mould
Block group includes transformer station, circuit and distribution facility；Described power distribution automation module group includes feeder automation configuration, communication mode
With relaying configuration principle.
Preferably, described step 1) in, described powering mode scheme group is divided into base with A+, A, B, C, D, E class service area
Plinth, according to different regions electrical network present situation and development orientation, determines contact potential series module；Determine the target net of applicable regional development
Structure, selects suitable standardization facility, ensures the reliable access of different classes of power supply and user simultaneously, is formed and adapt to differently
28 kinds of power distribution network typical case's powering modes of district's development；Power grid construction makes an investment in model construction and the basis of boundary condition parameter setting
On, according to the scale in 28 kinds of typical powering mode scheme base, calculating overall construction investment, power grid construction Investment calculation includes becoming
Power plant construction investment, track investment, distribution transforming investment and specific load investment.
Preferably, described step 2) in, high voltage power supply points distribution models be built upon the 110kV on the model of block,
66kV and 35kV transformer station distributed model, each high-tension electricity source point is a border circular areas for district's scope, and block is as minimum
Load cell, it has pin numbers, load and three basic parameters of area, and arranges one or two reserved parameter；Block
Model is made up of some blocks, different according to locus, positions each block, forms vector model；Block model
In each block parameter energy whole installation, also according to practical situation, each block parameter individually can be revised.
Preferably, described step 3) in, described power distribution network parameter includes transformer station, circuit and distribution transforming；Described transformer station sets
Put transformer station's quantity, capacity, outlet scale, transformer station's load factor and investment of substations unit price；Described circuit arranges aerial line, electricity
The limit electric current of cable different model circuit, conveying power, chopper and investment unit price；Described distribution transforming arranges the capacity of different distribution transforming
Specification and investment unit price；Described power supply reliability arranges the different power supply reliability for district's present situation year and A+-E Lei Gong district target year
The power supply reliability of planning.
Preferably, described step 5) in, described adjusted coefficient K changes with for district's type difference, all kinds of corresponding for district
Correction factor is:
| For district's type | The value of adjusted coefficient K |
| A+ | 1 |
| A | 1.05 |
| B | 1.1 |
| C | 1.15 |
| D | 1.2 |
| E | 1.3 |
Due to the fact that and take above technical scheme, it has the advantage that 1, the present invention uses power grid construction investment meter
Calculate model, beneficially standardization, quantitatively evaluating, specification each power supply area power grid construction.2, the present invention uses typical case's powering mode
Project investment computational methods, it is to avoid excess investment, repeated construction, carry for Guo Wang company typical case powering mode project investment management
For the decision-making assistant information quantified.
Accompanying drawing explanation
Fig. 1 is overall flow schematic diagram of the present invention；
Fig. 2 is that the model boundary conditional parameter of the present invention arranges schematic diagram.
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, the present invention provides a kind of project investment computational methods based on typical case's powering mode, and it is concrete
Step is as follows:
1) typical case's powering mode scheme base is set up；
Typical case's powering mode scheme base is made up of basic module group and powering mode scheme group；
(1) basic module group is made up of contact potential series module group, standardization infrastructure modules group and power distribution automation module group；
Contact potential series module group includes the combination of different contact potential series: 110/10/0.38 kilovolt, 110/35/10/0.38
Kilovolt, 66/10/0.38 kilovolt, 35/10/0.38 kilovolt, 110/35/0.38 kilovolt；
Standardization infrastructure modules group includes transformer station, circuit and distribution facility；Transformer station includes construction form, main transformer number of units
And capacity, each electric pressure electrical main connecting wire pattern and line feeder number and idle configuration；Circuit includes construction form and leads
Line cross section；Distribution facility includes construction form, distribution transforming number of units and capacity and electrical main connecting wire pattern and line feeder number；
Power distribution automation module group includes feeder automation configuration, communication mode and relaying configuration principle；Feeder automation
Configuration includes centralized, intelligent distributed, automatic circuit formula and fault detector formula on the spot；Communication mode include optical fiber, wireless and
Carrier wave；
(2) powering mode scheme group is divided into basis with A+, A, B, C, D, E class service area, existing according to different regions electrical network
Shape and development orientation, determine contact potential series module；
In A+～E class service area, (administrative area, commerce and trade district, residential block, development zone, high-new according to different plot function
District, industrial park and agricultural production district etc.) divide, planning region load density, power supply reliability, integrated voltage conjunction are proposed
Lattice rate and the technical specification turning the ability of confession, determine the target net structure of applicable regional development, select suitable standardization facility,
Ensure the reliable access of different classes of power supply and user simultaneously, form the 28 kinds of power distribution network typical cases adapting to develop different regions and power
Pattern；
On the basis of power grid construction makes an investment in project investment model construction and the setting of boundary condition parameter, according to 28 kinds of typical cases
Scale in powering mode scheme base, calculates overall construction investment, and power grid construction Investment calculation includes transformer substation construction investment, line
Road investment, distribution transforming investment and specific load investment；
2) typical case's powering mode project investment model is set up；
(1) the upper level power supply of typical case's powering mode project investment model, no matter which kind of mode of connection, all can fully meet down
Level 110kV and the power demands of following power distribution network；
(2) high voltage power supply points distribution models is set up；
High voltage power supply points distribution models is built upon 110kV, 66kV and 35kV transformer station distributed mode on the model of block
Type, uses the same space coordinate with block model, and each high-tension electricity source point is a border circular areas for district's scope, it is assumed that by 4
High-tension electricity source point A, B, C, D of individual same scale can surround a foursquare power supply area；By this square area
ABCD carries out the division of less power supply unit, and i.e. power block, block as minimum load cell, its have pin numbers,
Load and three basic parameters of area, and one or two reserved parameter is set, in case other purposes；Block model is by some blocks
Constitute (being 256 × 256 to the maximum), different according to locus, each block is positioned, forms vector model, it is simple to
Subsequent development research；In the model of block, each block parameter can whole installation, it is possible to according to practical situation to each block parameter
Individually revise, make whole model have expansion；
3) the boundary condition parameter of typical case's powering mode project investment model is configured；
Boundary condition parameter includes power distribution network parameter, power supply reliability and load density scope；
Power distribution network parameter includes transformer station, circuit and distribution transforming；Principal set up transformer station of transformer station quantity, capacity, outlet rule
Mould, transformer station's load factor and investment of substations unit price；Circuit arranges aerial line, the limit electric current of cable different model circuit, defeated
Send power, chopper and investment unit price etc.；Distribution transforming arranges capacity specifications and the investment unit price of different distribution transforming；
Power supply reliability mainly needs to arrange the different power supply reliability for district's present situation year, and " distribution network planning designs
Fire protection technology " in propose A+-E Lei Gong district target year planning power supply reliability；
Load density scope is according to the needs of this area economic development, it is judged that the upper and lower bound of load density；Such as allusion quotation
Type Connection Mode is A+, A, B, C, D, E, and load density scope is 0.1-50MW/km2Or 50MW/km2Any of the above value, every 2MW/
km2One-level or every 5MW/km2One-level；
4) unique typical case's powering mode is chosen；
From 28 kinds of typical powering modes of typical case's powering mode scheme base, select one or more typical case's powering modes,
Powering mode as planning region；Calculate the specific load investment value Ce of selected typical powering mode, if selected
Result two or more, with typical case powering mode project investment model calculate respectively selected several modes specific load investment
Value, that typical case's powering mode that contrast Ce value is minimum, it is selected unique typical case's powering mode and the specific load of correspondence
Investment value Ce；
5) typical case's powering mode project investment model is calculated；
(1) determine whether newly-built region, if newly-built region, then enter step (2), otherwise for transformation region, enter
Enter step (3)；
(2) if power supply area is newly-built region, under typical case's powering mode, the calculating of power distribution network grassroot project investment Ca is public
Formula is:
Ca=σ * S*Ce (1)
Wherein, the newly-built investment of power distribution network under Ca is typical case's powering mode；σ is the load density in the planning year of power supply area
(MW/km2)；S is the powering area (km in power supply area planning year2)；Ce is the specific load investment value of selected powering mode
(ten thousand yuan/MW).
(3) if power supply area is transformation region, then the power supply reliability RS1 in this power supply area present situation year is needed1, with allusion quotation
The power supply reliability RS1 that the type power supply area planning year object of planning is formulated2Compare；
If RS11>RS12, then:
Ca=σ2*S2*Ce2—σ1*S1*Ce1 (2)
If RS11<RS12, then:
Ca=σ2*S2*Ce2—1/K*σ1*S1*Ce1 (3)
Wherein, distribution network transform investment under Ca is typical case's powering mode；σ1Load density for the present situation year of power supply area
(MW/km2)；σ2Load density (MW/km for the planning year of power supply area2)；S1Powering area for power supply area present situation year
(km2)；S2Powering area (km for power supply area planning year2)；Ce1For under selected powering mode, under present situation year load density
Specific load investment value (ten thousand yuan/MW)；Ce2For under selected powering mode, the specific load under planning year load density is thrown
Money value (ten thousand yuan/MW)；K is correction factor, and K changes, all kinds of correction factor such as table 1 institutes corresponding for district with for district's type difference
Show.
Table 1
Embodiment, the application example of Jiangsu Province's Yangzhou electrical network；
(1) Yangzhou service area type has A, B, C, D tetra-class, and present situation Nian Gong district four type load density is respectively 7.6000MW/
km2、2.6403MW/km2、0.5098MW/km2、0.2388MW/km2, the year two thousand twenty is respectively for district four type load density
9.0000MW/km2、3.1267MW/km2、0.6037MW/km2、0.2827MW/km2；
(2) according to Yangzhou for district's transformer substation voltage rate sequence, main transformer configuration number of units, capacity, medium-voltage line outlet of rolling off the production line
Deng, select Yangzhou for district powering mode be A, B class based on A-3, B-3 and B-2, C, D class based on C-1, C-2, D-2, D-5,
Totally seven quasi-representative powering mode；
(3) according to above-mentioned typical case's powering mode project investment model, it is judged that above seven quasi-representative powering modes most economical
Powering mode, selecting result is A-3, B-3, C-2, D-2 tetra-class；
(4) Yangzhou A, B, C, D tetra-Lei Gong district is existing for district's electrical network, in the requirement that load growth and power supply reliability are high
Lower construction and transformation, therefore contrast the power supply reliability in present situation Nian Gegong district and the confession of the year two thousand twenty typical case's powering mode planning requirement
Electricity reliability；
(5) calculating Yangzhou A, B, C, D tetra-Lei Gong districts investment, Yangzhou typical case's powering mode project investment amount of money is as shown in table 2:
Table 2
(6) advise with " Guo Wang Yangzhou electric company-project report-city-level company power distribution net project report 2015-reports version "
The Yangzhou common network each annual investment drawing measuring and calculating in report contrasts, and comparing result is as shown in table 3:
Table 3
Divide by A, B, C, D service area and sum up, 2016～average annual 7.4335 hundred million yuan of the year two thousand twenty typical case's powering mode investment,
Yangzhou power distribution network " 13 " project report is estimated result, 2016～average annual 8.2994 hundred million yuan of the year two thousand twenty, the two difference times
Rate is 1.12；
During calculating, due to local price difference and electric project engineer's occupational habit, at the beginning of boundary condition parameter
During beginning is arranged, there is Parcel division, load prediction, lectotype selection, unit price, line length and circuit mounting distribution transforming number of combinations
Deng parameter differences, there is error with the report estimation contrast of Yangzhou distribution network planning, belong to normal phenomenon, difference multiplying power 1.12 is very
Close result, demonstrates the science of the present invention and the succinct suitability；
In sum, the present invention by set up typical case powering mode scheme base and typical case powering mode project investment model,
Propose the typical powering mode project investment computational methods of complete set, input required to the development of power supply area future load
Construction fund calculates, and contrasts in Operation in Yangzhou Area, and final result is in acceptable range of error, for national grid
Upper management department is according to load density, typical case's factor such as powering mode, power supply reliability, to the annual planning of subordinate power supply enterprise
Construction fund is distributed, it is provided that useful reference guide is worth.
The various embodiments described above are merely to illustrate the present invention, the structure of each parts, size, arrange position and shape is all permissible
Be varied from, on the basis of technical solution of the present invention, all improvement individual part carried out according to the principle of the invention and etc.
With conversion, the most should not get rid of outside protection scope of the present invention.
Claims (6)
1. project investment computational methods based on typical case's powering mode, it is characterised in that: it comprises the following steps:
1) setting up typical case's powering mode scheme base, typical case's powering mode scheme base is by basic module group and powering mode scheme group structure
Become；
2) typical case's powering mode project investment model is set up；
3) being configured the boundary condition parameter of typical case's powering mode project investment model, boundary condition parameter includes power distribution network
Parameter, power supply reliability and load density scope；
4) unique typical case's powering mode is chosen；
From 28 kinds of typical powering modes of typical case's powering mode scheme base, select one or more typical case's powering modes, as
The powering mode of planning region；Calculate the specific load investment value Ce of selected typical powering mode, if the knot selected
The most two or more, the specific load investment value of selected several modes is calculated respectively with typical case's powering mode project investment model, right
That typical case powering mode more minimum than Ce value, is selected unique typical case's powering mode and the specific load investment value of correspondence
Ce；
5) typical case's powering mode project investment model is calculated；
(1) determine whether newly-built region, if newly-built region, then enter step (2), otherwise for transformation region, enter step
Suddenly (3)；
(2) if power supply area is newly-built region, under typical case's powering mode, the computing formula of power distribution network grassroot project investment Ca is:
Ca=σ * S*Ce,
Wherein, the newly-built investment of power distribution network under Ca is typical case's powering mode；σ is the load density in the planning year of power supply area, unit
For MW/km2；S is the powering area in power supply area planning year, and unit is km2；Ce is that the specific load of selected powering mode is thrown
Money value, unit is ten thousand yuan/MW；
(3) if power supply area is transformation region, then the power supply reliability RS1 in this power supply area present situation year is needed1, supply with typical case
The power supply reliability RS1 that the electricity regional planning year object of planning is formulated2Compare；
If RS11>RS12, then:
Ca=σ2*S2*Ce2—σ1*S1*Ce1,
If RS11<RS12, then:
Ca=σ2*S2*Ce2—1/K*σ1*S1*Ce1,
Wherein, distribution network transform investment under Ca is typical case's powering mode；σ1For the load density in the present situation year of power supply area, unit
For MW/km2；σ2For the load density in the planning year of power supply area, unit is MW/km2；S1Power supply for power supply area present situation year
Area, unit is km2；S2For the powering area in power supply area planning year, unit is km2；Ce1For under selected powering mode, show
Specific load investment value under shape year load density, unit is ten thousand yuan/MW；Ce2For under selected powering mode, plan year load
Specific load investment value under density, unit is ten thousand yuan/MW；K is correction factor.
A kind of project investment computational methods based on typical case's powering mode, it is characterised in that: described
Step 1) in, described basic module group is by contact potential series module group, standardization infrastructure modules group and power distribution automation module group structure
Become；Described contact potential series module group is different contact potential series combination；Described standardization infrastructure modules group includes transformer station, circuit
And distribution facility；Described power distribution automation module group includes feeder automation configuration, communication mode and relaying configuration principle.
A kind of project investment computational methods based on typical case's powering mode, it is characterised in that: described
Step 1) in, described powering mode scheme group is divided into basis, according to different regions electrical network with A+, A, B, C, D, E class service area
Present situation and development orientation, determine contact potential series module；Determine the target net structure of applicable regional development, select suitable standard
Change facility, ensure the reliable access of different classes of power supply and user simultaneously, form the 28 kinds of power distribution networks adapting to different regions development
Typical case's powering mode；On the basis of power grid construction makes an investment in model construction and the setting of boundary condition parameter, supply according to 28 kinds of typical cases
Scale in power mode scheme base, calculates overall construction investment, and power grid construction Investment calculation includes transformer substation construction investment, circuit
Investment, distribution transforming investment and specific load investment.
A kind of project investment computational methods based on typical case's powering mode, it is characterised in that: described
Step 2) in, high voltage power supply points distribution models is built upon 110kV, 66kV and 35kV transformer station distributed mode on the model of block
Type, each high-tension electricity source point is a border circular areas for district's scope, and block is as minimum load cell, and it has location and compiles
Number, load and three basic parameters of area, and one or two reserved parameter is set；Block model is made up of some blocks, according to
Locus is different, positions each block, forms vector model；In the model of block, each block parameter energy entirety sets
Put, also according to practical situation, each block parameter individually can be revised.
A kind of project investment computational methods based on typical case's powering mode, it is characterised in that: described
Step 3) in, described power distribution network parameter includes transformer station, circuit and distribution transforming；Described transformer station arranges transformer station's quantity, capacity, goes out
Line scale, transformer station's load factor and investment of substations unit price；Described circuit arranges aerial line, the limit of cable different model circuit
Electric current, conveying power, chopper and investment unit price；Described distribution transforming arranges capacity specifications and the investment unit price of different distribution transforming；Described
Power supply reliability arranges the different power supply reliability for district's present situation year and the power supply reliability of A+-E Lei Gong district target year planning.
A kind of project investment computational methods based on typical case's powering mode, it is characterised in that: described
Step 5) in, described adjusted coefficient K changes with for district's type difference, and all kinds of correction factors corresponding for district are:
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106557870A (en) * | 2016-11-03 | 2017-04-05 | 国网河南节能服务有限公司 | A kind of energy potential evaluation method for electrical network energy contract mangement project |
| CN107067337A (en) * | 2016-12-08 | 2017-08-18 | 国家电网公司 | A kind of power distribution network high reliability powering mode determines method |
| CN108229786A (en) * | 2017-11-27 | 2018-06-29 | 国网河北省电力公司经济技术研究院 | Electric grid investment allocation processing method and device |
| CN108305016A (en) * | 2018-03-05 | 2018-07-20 | 国网陕西省电力公司 | A kind of power distribution network capital investment model and investment data obtain system |
| CN114638537A (en) * | 2022-04-02 | 2022-06-17 | 湖北精准极速科技有限公司 | Digital smart power grid region management method, system and storage medium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106557870A (en) * | 2016-11-03 | 2017-04-05 | 国网河南节能服务有限公司 | A kind of energy potential evaluation method for electrical network energy contract mangement project |
| CN107067337A (en) * | 2016-12-08 | 2017-08-18 | 国家电网公司 | A kind of power distribution network high reliability powering mode determines method |
| CN108229786A (en) * | 2017-11-27 | 2018-06-29 | 国网河北省电力公司经济技术研究院 | Electric grid investment allocation processing method and device |
| CN108229786B (en) * | 2017-11-27 | 2021-07-09 | 国网河北省电力公司经济技术研究院 | Power grid investment distribution processing method and device |
| CN108305016A (en) * | 2018-03-05 | 2018-07-20 | 国网陕西省电力公司 | A kind of power distribution network capital investment model and investment data obtain system |
| CN114638537A (en) * | 2022-04-02 | 2022-06-17 | 湖北精准极速科技有限公司 | Digital smart power grid region management method, system and storage medium |
| CN114638537B (en) * | 2022-04-02 | 2022-11-22 | 广西电网有限责任公司钦州供电局 | Digital smart power grid region management method, system and storage medium |
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