CN106487012A

CN106487012A - A kind of system of selection of high voltage distribution network powering mode and system

Info

Publication number: CN106487012A
Application number: CN201611080427.2A
Authority: CN
Inventors: 刘民伟
Original assignee: Yunnan Power Grid Co Ltd
Current assignee: Yunnan Power Grid Co Ltd
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2017-03-08
Anticipated expiration: 2036-11-30
Also published as: CN106487012B

Abstract

The invention provides a kind of system of selection of high voltage distribution network powering mode and system, wherein said system of selection includes the relation according to total load and main transformer capacity, or radius of electricity supply and the relation of the power supply area gross area, determine 110/10kV powering mode corresponding transformer station scale and corresponding line size；110/35/10kV transformer station scale is calculated according to total load and main transformer capacity, and according to obtaining 35/10kV transformer station scale, determines 110/35/10kV powering mode corresponding transformer station scale and corresponding line size；Calculate the power distribution network cost of investment of different powering modes under same load density according to the relational model between transformer station's scale, line size and power distribution network cost of investment respectively；Powering mode is selected according to power distribution network cost of investment.Technical scheme can reduce the unreasonable situation with investment waste of electric pressure.

Description

A kind of system of selection of high voltage distribution network powering mode and system

Technical field

The present invention relates to high voltage power distribution technical field, more specifically, it is related to a kind of high voltage distribution network powering mode System of selection and system.

Background technology

High voltage power distribution passes through high-transmission voltage, and the mode of low transmission electric current is user's transmission and configuration electric energy, can reduce The thermal losses of electric current and material cost during transmission of electricity, are a kind of remote and low-loss distribution forms.

High voltage distribution network contact potential series mainly includes two kinds of 110kV and 35kV, and wherein, the transformer station of 110kV is corresponding low Pressure side voltage is 10kV, and corresponding medium voltage side voltage is 35kV.Corresponding with high voltage distribution network contact potential series, existing height is press-fitted Electrical network mainly has 110/10kV one-level blood pressure lowering and two kinds of powering modes of 110/35/10kV two-stage blood pressure lowering.

The higher city Netcom of load density directly goes out 10kV circuit frequently with 110kV transformer station and is supplied under normal circumstances Electricity；The relatively low rural power grids of load density generally go out 35kV circuit using the medium voltage side of 110kV transformer station and 35kV transformer station are supplied Electricity, 35kV transformer station goes out 10kV circuit again and carries out two-stage blood pressure lowering powers.However, being directed to from 110/10kV one-level in prior art The powering mode of 110/35/10kV two-stage blood pressure lowering is still selected in blood pressure lowering, and ripe selection strategy, does not lead in actual electricity Network planning draw and process of construction in have that electric pressure is unreasonable, the situation of repeated construction and investment waste.

Content of the invention

It is an object of the invention to provide the technical scheme of a kind of system of selection of high voltage distribution network powering mode and system, with Solve to be directed to one-level blood pressure lowering and two kinds of powering modes of two grades of blood pressure lowerings in the prior art described in background technology, there is no ripe choosing Select strategy, lead to exist that electric pressure is unreasonable, the problem of repeated construction and investment waste.

In order to solve above-mentioned technical problem, the present invention provides following technical scheme：

According to the first aspect of the invention, there is provided a kind of system of selection of high voltage distribution network powering mode, including：

The relation of the main transformer capacity of the total load according to power supply area and 110kV transformator, or according to 110kV transformer station Radius of electricity supply and power supply area the gross area relation, determine 110/10kV powering mode corresponding transformer station scale；

The corresponding line of 110/10kV powering mode is calculated according to described 110/10kV powering mode corresponding transformer station scale Road scale；

The relation calculated 110/ of the main transformer capacity of the total load according to described power supply area and 110kV transformator 35/10kV transformer station scale, and 35/10kV transformer station scale, determine that the corresponding transformer station of 110/35/10kV powering mode advises Mould, wherein, the main transformer capacity of the load density according to power supply area for the described 35/10kV transformer station scale and 35/10kV transformator Relation or be calculated according to the radius of electricity supply of 35/10kV transformer station；

According to described 110/35/10kV powering mode corresponding transformer station scale, calculate 110/35/10kV powering mode pair The line size answered；

According to the relational model between transformer station's scale, line size and power distribution network cost of investment, calculate respectively predetermined 110/10kV powering mode corresponding power distribution network cost of investment and 110/35/10kV under same load density in the range of load density Powering mode corresponding power distribution network cost of investment；

According to described power distribution network cost of investment, described 110/10kV powering mode or described 110/35/10kV is selected to power Pattern is as the powering mode of high voltage distribution network.

Preferably, the relation of the main transformer capacity of the described total load according to power supply area and 110kV transformator, or according to The relation of the gross area of the radius of electricity supply of 110kV transformer station and power supply area, determines the corresponding power transformation of 110/10kV powering mode Stand scale, including：

Calculate the total load of described power supply area and the ratio of the main transformer capacity of 110kV transformator, according to described ratio with The product of the capacity-load ratio of 110kV transformator, is calculated 110kV transformator number of units corresponding with power supply capacity；

According to the number of units of described 110kV transformator corresponding with power supply capacity, in conjunction with transformator number of units and transformer station's seat number Corresponding relation, be calculated 110kV transformer station corresponding with power supply capacity seat number；

Determine described 110kV transformator number of units corresponding with power supply capacity and 110kV transformer station seat number as with supply electric energy Power corresponding 110/10kV transformer station scale；

Radius of electricity supply according to described 110kV transformer station calculates the powering area of single seat 110kV transformer station, according to described list Relation between the powering area of seat 110kV transformer station and the gross area of described power supply area, is calculated corresponding with radius of electricity supply 110kV transformer station seat number；

According to described 110kV transformer station corresponding with radius of electricity supply seat number, in conjunction with described transformator number of units and transformer station's seat Corresponding relation between number, is calculated 110kV transformator number of units corresponding with radius of electricity supply；

Determine that described 110kV transformator number of units corresponding with radius of electricity supply and 110kV transformer station seat number are and radius of electricity supply Corresponding 110/10kV transformer station scale；

According to 110kV transformer station seat number, choose 110/10kV transformer station scale corresponding with power supply capacity or choose and supply Electric radius corresponding 110/10kV transformer station scale is as described 110/10kV powering mode corresponding transformer station scale.

Preferably, the relation of the main transformer capacity of the described total load according to power supply area and 110kV transformator is calculated 110/35/10kV transformer station scale, and the main transformer capacity of the load density according to power supply area and 35/10kV transformator Relation or the radius of electricity supply calculated 35/10kV transformer station scale according to 35/10kV transformer station, determine 110/35/ 10kV powering mode corresponding transformer station scale, including：

Calculate the total load of described power supply area and the ratio of the main transformer capacity of 110kV transformator, according to described ratio with The product of the capacity-load ratio of 110kV transformator, is calculated 110kV transformator number of units；

According to described 110kV transformator number of units, in conjunction with the corresponding relation between transformator number of units and transformer station's seat number, calculate 110kV transformer station seat number；

Determine that described 110kV transformator number of units and described 110kV transformer station seat number are 110/35/10kV transformer station scale.

Preferably, the relation of the main transformer capacity of the described total load according to power supply area and 110kV transformator is calculated 110/35/10kV transformer station scale, and the main transformer capacity of the load density according to power supply area and 35/10kV transformator Relation or the radius of electricity supply calculated 35/10kV transformer station scale according to 35/10kV transformer station, determine 110/35/ 10kV powering mode corresponding transformer station scale, also includes：

The corresponding powering area of supply district according to Mei Zuo 110kV transformer station and load density, and 35/10kV transformation The capacity-load ratio of device and main transformer capacity, calculate 35/10kV corresponding with power supply capacity in the supply district of Mei Zuo 110kV transformer station and become Depressor number of units；

According to described 35/10kV transformator number of units corresponding with power supply capacity, in conjunction with transformator number of units and transformer station's seat number Between corresponding relation, calculate 35/10kV transformer station corresponding with power supply capacity seat in the supply district of Mei Zuo 110kV transformer station Number；

Determine 35/10kV transformator number of units corresponding with power supply capacity and 35/ in the supply district of described 110kV transformer station 10kV transformer station seat number is as 35/10kV transformer station corresponding with power supply capacity rule in the supply district of Mei Zuo 110kV transformer station Mould；

And,

The corresponding powering area of supply district according to Mei Zuo 110kV transformer station and the confession of Mei Zuo 35/10kV transformer station Electric radius, calculates 35/10kV transformer station corresponding with radius of electricity supply seat number in the supply district of Mei Zuo 110kV transformer station；

According to described 35/10kV transformer station corresponding with radius of electricity supply seat number, in conjunction with transformator number of units and transformer station's seat number Corresponding relation, calculate Mei Zuo 110kV transformer station supply district in 35/10kV transformator number of units corresponding with radius of electricity supply；

Determine described 35/10kV transformer station corresponding with radius of electricity supply seat number and 35/10kV transformator number of units as every 35/10kV transformer station corresponding with radius of electricity supply scale in the supply district of 110kV transformer station；

How many according to 35/10kV transformer station seat number, choose described 35/10kV transformer station scale corresponding with power supply capacity or Described 35/10kV transformer station corresponding with radius of electricity supply scale is as the 35/10kV transformer station under 110/35/10kV powering mode Scale；

According to described 110/35/10kV transformer station scale and described 35/10kV transformer station scale, determine 110/35/ 10kV powering mode corresponding transformer station scale.

Preferably, described according to the relational model between transformer station's scale, line size and power distribution network cost of investment, respectively Calculate in predetermined load density range under same load density 110/10kV powering mode corresponding power distribution network cost of investment and 110/35/10kV powering mode corresponding power distribution network cost of investment, including：

According to relational model： Calculate 110/10kV powering mode corresponding power distribution network cost of investment and the corresponding power distribution network of 110/35/10kV powering mode respectively Cost of investment；Wherein, C_munRepresent power distribution network cost of investment, C_SUBRepresent transformer station's size investment cost, C_lenRepresent line size Cost of investment, C^kIt is expressed as every high voltage substation cost, k is expressed as electric pressure；NS^kIt is expressed as the corresponding change of electric pressure Power station seat number, NT^kIt is expressed as electric pressure corresponding transformator number of units,It is expressed as electric pressure corresponding maximum transformation Device number of units, Mo represents circuit unit price, Len^kRepresent the corresponding total line length of electric pressure, λ is the corresponding throwing of transformer station's seat number Money cost accounting.

Preferably, described 110/10kV powering mode pair is calculated according to 110/10kV powering mode corresponding transformer station scale The line size answered, including：

According to the load density of power supply area, determine the corresponding grid structure of described 110/10kV powering mode；

According to 110/10kV powering mode corresponding 110kV transformer station's seat number and grid structure, calculate 110kV high voltage power distribution The total length of circuit；

Determine the radius of electricity supply of 10kV medium-voltage distribution circuit according to described 110kV transformer station seat number, according in described 10kV It is press-fitted the radius of electricity supply of electric line and returns number, calculate the total length of 10kV medium-voltage distribution circuit；

Calculate the total length of described 110kV high-tension distributing line and the total length sum of 10kV medium-voltage distribution circuit, as The corresponding line size of described 110/10kV powering mode.

Preferably, described according to 110/35/10kV powering mode corresponding transformer station scale, calculate 110/35/10kV and supply The corresponding line size of power mode, including：

According to the load density of power supply area, determine the corresponding grid structure of described 110/35/10kV powering mode；

According to 110/35/10kV powering mode corresponding 110kV transformer station's seat number and grid structure, calculate 110kV high pressure The total length of distribution line；

According to 35/10kV transformer station seat number and number of units in Mei Zuo 110kV transformer station supply district, calculate every 110kV and become In the range of power station power supply, the average distance of 35/10kV transformer station and circuit return number；

Average distance according to described 35/10kV transformer station and circuit return number, calculate the overall length of 35kV high-tension distributing line Degree；

Main transformer capacity according to 35/10kV transformator and number of units, calculate the total length of 10kV medium-voltage distribution circuit；

Calculate pressure in total length, the total length of 35kV high-tension distributing line and the 10kV of described 110kV high-tension distributing line The total length sum of distribution line, as the corresponding line size of described 110/35/10kV powering mode.

According to the second aspect of the invention, a kind of selection system of high voltage distribution network powering mode, its feature are additionally provided It is, including：

First transformer station's scale determining module, the main transformer for the total load according to power supply area and 110kV transformator holds The relation of amount, or the relation of the gross area of the radius of electricity supply according to 110kV transformer station and power supply area, determine that 110/10kV supplies Power mode corresponding transformer station scale；

First line scale computing module, for calculating according to described 110/10kV powering mode corresponding transformer station scale The corresponding line size of 110/10kV powering mode；

Second transformer station's scale determining module, for the master of the total load according to described power supply area and 110kV transformator The relation calculated 110/35/10kV transformer station scale of varying capacity, and 35/10kV transformer station scale, determine 110/35/ 10kV powering mode corresponding transformer station scale, wherein, described 35/10kV transformer station scale is close according to the load of power supply area Degree and the relation of 35/10kV transformer main change capacity or calculated according to the radius of electricity supply of 35/10kV transformer station；

Second line size computing module, for according to described 110/35/10kV powering mode corresponding transformer station scale, Calculate the corresponding line size of 110/35/10kV powering mode；

Cost calculation module, for according to the relation between transformer station's scale, line size and power distribution network cost of investment, dividing Ji Suan not 110/10kV powering mode corresponding power distribution network cost of investment and 110/35/10kV powering mode under same load density Corresponding power distribution network cost of investment；

Powering mode selecting module, for according to described power distribution network cost of investment, selecting described 110/10kV powering mode Or described 110/35/10kV powering mode is as the powering mode of high voltage distribution network.

Preferably, described first transformer station's scale determining module, including：

First transformator number of units calculating sub module, for calculating the total load of described power supply area and 110kV transformator The ratio of main transformer capacity, according to the product of described ratio and the capacity-load ratio of 110kV transformator, is calculated corresponding with power supply capacity 110kV transformator number of units；

First transformer station's seat number calculating sub module, for the platform according to described 110kV transformator corresponding with power supply capacity Number, in conjunction with the corresponding relation of transformator number of units and transformer station's seat number, is calculated 110kV transformer station corresponding with power supply capacity seat Number；

First transformer station's scale determination sub-module, for determining described 110kV transformator number of units corresponding with power supply capacity With 110kV transformer station seat number as 110/10kV transformer station corresponding with power supply capacity scale；

Second transformer station's seat number calculating sub module, calculates single seat for the radius of electricity supply according to described 110kV transformer station The powering area of 110kV transformer station, the powering area according to described single seat 110kV transformer station and the gross area of described power supply area Between relation, be calculated 110kV transformer station corresponding with radius of electricity supply seat number；

Second transformator number of units calculating sub module, for according to described 110kV transformer station corresponding with radius of electricity supply seat number, In conjunction with the corresponding relation between described transformator number of units and transformer station's seat number, it is calculated 110kV corresponding with radius of electricity supply and becomes Depressor number of units；

Second transformer station's scale determination sub-module, for determining described 110kV transformator number of units corresponding with radius of electricity supply It is 110/35/10kV transformer station corresponding with radius of electricity supply scale with 110kV transformer station seat number；

First transformer station's scale chooses submodule, for according to 110kV transformer station seat number, choosing corresponding with power supply capacity 110/10kV transformer station scale or selection 110/10kV transformer station corresponding with radius of electricity supply scale supply as described 110/10kV Power mode corresponding transformer station scale.

Preferably, described second transformer station's scale determining module, including：

3rd transformator number of units calculating sub module, for calculating the total load of described power supply area and 110kV transformator The ratio of main transformer capacity, according to the product of described ratio and the capacity-load ratio of 110kV transformator, is calculated 110kV transformer platform Number；

3rd transformer station's seat number calculating sub module, for according to described 110kV transformator number of units, in conjunction with transformator number of units with Corresponding relation between transformer station's seat number, calculates 110kV transformer station seat number；

3rd transformer station's scale determination sub-module, for determining described 110kV transformator number of units and described 110kV transformer station Seat number is 110/35/10kV transformer station scale.

Preferably, described second transformer station's scale determining module, also includes：

4th transformator number of units calculating sub module, for the corresponding power supply of supply district according to Mei Zuo 110kV transformer station Area and load density, and the capacity-load ratio of 35/10kV transformator and main transformer capacity, calculate the power supply of Mei Zuo 110kV transformer station In the range of 35/10kV transformator number of units corresponding with power supply capacity；

4th transformer station's seat number calculating sub module, for according to described 35/10kV transformer platform corresponding with power supply capacity Number, in conjunction with the corresponding relation between transformator number of units and transformer station's seat number, calculate in the supply district of Mei Zuo 110kV transformer station with Power supply capacity corresponding 35/10kV transformer station seat number；

4th transformer station's scale determination sub-module, for determining in the supply district of described 110kV transformer station and supplying electric energy Power corresponding 35/10kV transformator number of units and 35/10kV transformer station seat number as in the supply district of Mei Zuo 110kV transformer station with Power supply capacity corresponding 35/10kV transformer station scale；

And,

5th transformer station's seat number calculating sub module, for the corresponding power supply of supply district according to Mei Zuo 110kV transformer station Area and the radius of electricity supply of Mei Zuo 35/10kV transformer station, calculate in the supply district of Mei Zuo 110kV transformer station and radius of electricity supply Corresponding 35/10kV transformer station seat number；

5th transformator number of units calculating sub module, for according to described 35/10kV transformer station corresponding with radius of electricity supply seat Number, in conjunction with the corresponding relation of transformator number of units and transformer station's seat number, calculates in the supply district of Mei Zuo 110kV transformer station and power supply Radius corresponding 35/10kV transformator number of units；

5th transformer station's scale determination sub-module, for determining described 35/10kV transformer station corresponding with radius of electricity supply seat Number and 35/10kV transformator number of units become as 35/10kV corresponding with radius of electricity supply in the supply district of Mei Zuo 110kV transformer station Power plant scale；

Second transformer station's scale chooses submodule, for how many according to 35/10kV transformer station seat number, chooses described and power supply Ability corresponding 35/10kV transformer station's scale or described 35/10kV transformer station corresponding with radius of electricity supply scale are as 110/35/ 35/10kV transformer station scale under 10kV powering mode；

6th transformer station's scale determination sub-module, for according to described 110/35/10kV transformer station scale and described 35/ 10kV transformer station scale, determines 110/35/10kV powering mode corresponding transformer station scale.

Preferably, described cost calculation module, specifically for according to relational model： Calculate the investment of 110/10kV powering mode corresponding power distribution network respectively Cost and 110/35/10kV powering mode corresponding power distribution network cost of investment；Wherein, C_munRepresent power distribution network cost of investment, C_SUB Represent transformer station's size investment cost, C_lenRepresent line size cost of investment, C^kIt is expressed as every high voltage substation cost, k table It is shown as electric pressure；NS^kIt is expressed as electric pressure corresponding transformer station seat number, NT^kIt is expressed as the corresponding transformer platform of electric pressure Number,It is expressed as electric pressure corresponding maximum transformator number of units, Mo represents circuit unit price, Len^kRepresent total line length, λ For the corresponding cost of investment accounting of transformer station's seat number.

Preferably, described first line scale computing module, including：

First grid structure determination sub-module, for the load density according to power supply area, determines that described 110/10kV supplies The corresponding grid structure of power mode；

First line length computation submodule, for according to 110/10kV powering mode corresponding 110kV transformer station seat number And grid structure, calculate the total length of 110kV high-tension distributing line；

Second line length calculating sub module, for determining 10kV middle voltage distribution line according to described 110kV transformer station seat number The radius of electricity supply on road, the radius of electricity supply according to described 10kV medium-voltage distribution circuit and time number, calculate 10kV medium-voltage distribution circuit Total length；

First line scale determination sub-module, for calculating in the total length and 10kV of described 110kV high-tension distributing line It is press-fitted the total length sum of electric line, as the corresponding line size of described 110/10kV powering mode.

Preferably, described second line size computing module, including：

Second grid structure determination sub-module, for the load density according to power supply area, determines described 110/35/10kV The corresponding grid structure of powering mode；

Tertiary circuit length computation submodule, for according to 110/35/10kV powering mode corresponding 110kV transformer station seat Number and grid structure, calculate the total length of 110kV high-tension distributing line；

Distance and time number calculating sub module, for according to 35/10kV transformer station seat in Mei Zuo 110kV transformer station supply district Number and number of units, calculate the average distance of 35/10kV transformer station and circuit in Mei Zuo 110kV transformer station supply district and return number；

4th line length calculating sub module, returns number for the average distance according to described 35/10kV transformer station and circuit, Calculate the total length of 35kV high-tension distributing line；

5th line length calculating sub module, for the main transformer capacity according to 35/10kV transformator and number of units, calculates 10kV The total length of medium-voltage distribution circuit；

Second line size determination sub-module, for calculating total length, the 35kV high pressure of described 110kV high-tension distributing line The total length sum of the total length of distribution line and 10kV medium-voltage distribution circuit, as described 110/35/10kV powering mode pair The line size answered.

The selection scheme of the high voltage distribution network powering mode that the present invention provides, close according to the total load of power supply area, load Relation between degree and the main transformer capacity of transformator, or the relation of the radius of electricity supply according to transformer station and the power supply area gross area, Determine 110/10kV powering mode corresponding transformer station scale and 110/35/10kV powering mode corresponding transformer station rule respectively Mould, and line size corresponding with powering mode is calculated according to transformer station's scale, by according to the power transformation relevant with load density The relational model stood between scale, line size and power distribution network cost of investment, selects cost of investment under same load density less Transformer station's scale as power distribution network powering mode.This programme has the power distribution network powering mode selection strategy of maturation, thus Can reduce in actual Electric Power Network Planning and process of construction and there is the electric pressure unreasonable, repeated construction of setting and investment waste Situation.Wherein power distribution network cost of investment includes transformer station's size investment cost and line size cost of investment.

Brief description

For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below Accompanying drawing be briefly described it should be apparent that, for those of ordinary skills, do not paying creative work Property on the premise of, can also according to these accompanying drawings obtain other accompanying drawings.

Fig. 1 is a kind of flow process of the system of selection of high voltage distribution network powering mode shown in the present invention one exemplary embodiment Schematic diagram；

Fig. 2 is that a kind of 110/10kV shown in embodiment illustrated in fig. 1 powers scale corresponding transformer station scale determination method Schematic flow sheet；

Fig. 3 is the corresponding line size computational methods of a kind of 110/10kV powering mode shown in embodiment illustrated in fig. 1 Schematic flow sheet；

Fig. 4 is that the first the 110/35/10kV powering mode corresponding transformer station scale shown in embodiment illustrated in fig. 1 determines The schematic flow sheet of method；

Fig. 5 is that the second 110/35/10kV powering mode corresponding transformer station scale shown in embodiment illustrated in fig. 1 determines The schematic flow sheet of method；

Fig. 6 is the corresponding line size computational methods of a kind of 110/35/10kV powering mode shown in embodiment illustrated in fig. 1 Schematic flow sheet；

Fig. 7 is a kind of structure of the selection system of high voltage distribution network powering mode shown in the present invention one exemplary embodiment Schematic diagram；

Fig. 8 is a kind of structural representation of the first transformer station's scale determining module shown in embodiment illustrated in fig. 7；

Fig. 9 is a kind of structural representation of the first line scale computing module shown in embodiment illustrated in fig. 7；

Figure 10 is the structural representation of the second transformer station of the first shown in embodiment illustrated in fig. 7 scale determining module；

Figure 11 is the structural representation of second the second transformer station scale determining module shown in embodiment illustrated in fig. 7；

Figure 12 is a kind of structural representation of the second line size computing module shown in embodiment illustrated in fig. 7.

Specific embodiment

The selection scheme of high power distribution network powering mode provided in an embodiment of the present invention, solves described in background technology Do not have ripe select measurement, lead to exist that electric pressure is unreasonable, the problem of repeated construction and investment waste.

In order that those skilled in the art more fully understand the technical scheme in the embodiment of the present invention, and make the present invention real Apply the above-mentioned purpose of example, feature and advantage can become apparent from understandable, below in conjunction with the accompanying drawings to the technology in the embodiment of the present invention Scheme is described in further detail.

In the following embodiment of the present invention, the correlation technique principle of power supply area and assumed condition disclosure satisfy that following wanting Ask:

(1) region shape is square；(2) selection of the region Nei Wu mountain ridge and river factor restriction line corridor；

(3) do not consider the transform measure of original electrical network in this power supply area；(4) load in this power supply area uniformly divides Cloth；

(5) in load warp, pressure electric pressure is powered, and such as 10kV does not consider high pressure supplying water load；

(6) capacity-load ratio of 110kV transformator is between 1.8～2.1, the capacity-load ratio of 35kV transformator 1.8～2.1 it Between.

(7), in the powering mode of the present invention, 110kV transformer station includes 110/10kV station and 110/35/10kV station, Mei Yizuo The scale of transformer station considers according to 2 transformer configuration；The scale of 35kV transformer station considers according to 2 main transformer configurations；Transformer station The selection of main transformer capacity be defined below according to the difference of load density：For 110kV transformator, load density is in 0.1MW/ km²Hereinafter select 20MVA, load density is in 0.1MW/km²Select 40MVA above；Main transformer capacity for 35/10kV transformator Main transformer capacity from 6.3MVA.

(8) 35kV high voltage distribution network electric network composition considers according to bilateral source Dan Huilian；10kV rack is carried out by single radiation Planning.

Refer to accompanying drawing 1, Fig. 1 is a kind of choosing of the high voltage distribution network powering mode shown in the present invention one exemplary embodiment The schematic flow sheet of selection method.The system of selection of high voltage distribution network powering mode provided in an embodiment of the present invention, as shown in figure 1, Comprise the following steps：

S110：The relation of the main transformer capacity of the total load according to power supply area and 110kV transformator, or according to 110kV The relation of the gross area of the radius of electricity supply of transformer station and power supply area, determines that the corresponding transformer station of 110/10kV powering mode advises Mould.

As shown in Fig. 2 step S110：Total load according to power supply area and the main transformer capacity of 110kV transformator, or root According to the radius of electricity supply of 110kV transformer station and the gross area of power supply area, determine that the corresponding transformer station of 110/10kV powering mode advises Mould, including：

S111：Calculate the ratio of the main transformer capacity of the total load of power supply area and 110kV transformator, according to ratio with The product of the capacity-load ratio of 110kV transformator, is calculated 110kV transformator number of units corresponding with power supply capacity；

Main transformer capacity reflects the power supply capacity of transformator, and the capacity-load ratio of 110kV transformator is 1.8 as shown in the above Between～2.1, after knowing the main transformer capacity of 110kV transformator, you can according to the ratio of main transformer capacity and capacity-load ratio, determine The load that every 110kV transformator can carry, then the total load according to power supply area and every 110kV transformator is negative Lotus, can know the number of units according to the 110kV transformator needed for this power supply area that power supply capacity calculates；

For example：The total number of units of transformator of hypothesis power supply area is NT, and the total load of power supply area is P, the confession of separate unit main transformer Capacitance is SMT, then in power supply area, total number of units of transformator is represented by：

NT=M × P/S_MT, wherein, M is capacity-load ratio coefficient, can use 2.1；NT is the total number of units of transformator, result of calculation carry Round.Main transformer capacity S_MTDirectly take the main transformer capacity of 110kV transformer station, number of units NT=NT of 100kV transformator¹¹⁰.

S112：According to the number of units of 110kV transformator corresponding with power supply capacity, in conjunction with transformator number of units and transformer station's seat number Corresponding relation, be calculated 110kV transformer station corresponding with power supply capacity seat number.

In the embodiment of the present invention, transformator number of units and the ratio of transformer station seat number are 2:1, that is, according to 2 main transformers of Mei Zuo transformer station Consider, then in this power supply area, transformer station's seat number isWherein,For 110kV transformer station seat number.

S113：Determine that 110kV transformator number of units corresponding with power supply capacity and 110kV transformer station seat number are and power supply capacity Corresponding 110/10kV transformer station scale；

Transformer station's scale is mainly made up of transformer station's seat number and transformator number of units two parts, and Mei Zuo transformer station all comprises 1 Or multiple stage transformator, in the case of knowing this 110/10kV transformer station scale, can be according to the scale meter of this 110kV transformer station Calculate this corresponding cost of investment of transformer station's scale, and then select suitable powering mode.

Or,

S114：Radius of electricity supply according to 110kV transformer station calculates the powering area of single seat 110kV transformer station, according to single seat Relation between the powering area of 110kV transformer station and the gross area of power supply area, is calculated 110kV corresponding with radius of electricity supply Transformer station's seat number；

Radius of electricity supply reflects the supply district of transformer station, according to the radius of electricity supply of Mei Zuo 110kV transformer station, can determine The powering area of Mei Zuo 110kV transformer station, the then power supply face of the gross area according to power supply area and Mei Zuo 110kV transformer station Long-pending, you can to determine the seat number of the 110kV transformer station calculating according to radius of electricity supply.If the load density of power supply area is relatively low, due to Load density is relatively low, the major constraints of the power supply capacity Bu Shi transformer station scale of main transformer, and the major constraints of transformer station's scale are to become The radius of electricity supply in power station.

For example：110/10kV is landed vertically scheme, the radius of electricity supply of single seat transformer station is according to 10kV line powering ability 10km considers.According to this constraint, then land vertically transformer station's seat number of scheme of 110kV/10kV is：Wherein,For corresponding 110kV transformer station seat number under radius of electricity supply constraint, S is the gross area of power supply area, 200km²I.e. single seat The powering area of 110kV transformer station.The powering area of transformer station considers according to square in embodiments of the present invention, border circular areas Radius of electricity supply, that is, the diagonal as inscribed square consider, so that it is determined that the confession of the 110kV transformer station of 10km radius of electricity supply Electric area is

S115：According to 110kV transformer station corresponding with radius of electricity supply seat number, in conjunction with transformator number of units and transformer station's seat number it Between corresponding relation, be calculated 110kV transformator number of units corresponding with radius of electricity supply.

Corresponding relation between this transformator number of units and transformer station's seat number is 2:1 relation, according to this relation and above-mentioned 110kV transformer station corresponding with the radius of electricity supply seat number calculating, you can obtain the seat of 110kV transformer station corresponding with radius of electricity supply Number.

S116：Determine that 110kV transformator number of units corresponding with radius of electricity supply and 110kV transformer station seat number are and radius of electricity supply Corresponding 110/10kV transformer station scale.

Transformer station's scale is mainly made up of transformer station's seat number and transformator number of units two parts, and Mei Zuo transformer station all comprises 1 Or multiple stage transformator, in the case of knowing this 110/10kV transformer station scale, can be according to the scale meter of this 110kV transformer station Calculate this corresponding cost of investment of transformer station's scale, and then select suitable power supply mode, thus reducing cost of investment.

S117：According to 110kV transformer station seat number, choose 110/10kV transformer station scale corresponding with power supply capacity or selection 110/10kV transformer station corresponding with radius of electricity supply scale is as 110/10kV powering mode corresponding transformer station scale.

The relatively low load density area for rural area etc., transformer station's radius of electricity supply about 10km about, based on radius of electricity supply constraint Constrain, with the growth of load density, be gradually converted into the power transformation capacity by transformer station and constrain.In concrete calculating process, Transformer station seat number NS_110/10TakeWithIn maximum.In addition, need to ensure that Mei Zuo transformer station must have at least 1 Platform main transformer, therefore main transformer number of units need to be more than or equal to transformer station's seat number, i.e. NT_110/10≥NS_110/10.

When selecting powering mode, except considering transformer station's scale in addition it is also necessary to consider line size.Calculating line size When, need to consider grid structure.

S120：110/10kV powering mode corresponding line is calculated according to 110/10kV powering mode corresponding transformer station scale Scale.

As shown in figure 3, this step S120：110/10kV is calculated according to 110/10kV powering mode corresponding transformer station scale The corresponding line size of powering mode, specifically includes following sub-step：

S121：According to the load density of power supply area, determine the corresponding grid structure of 110/10kV powering mode；

Grid structure is related to load density, and when load density is less than 0.1MW/km2,110kV high voltage distribution network adopts Bilateral source Dan Huilian grid structure, when load density is more than or equal to 0.1MW/km2,110kV high voltage distribution network is not using Double back chain grid structure completely.

For 10kV medium voltage distribution network, all planned according to single radiation.

S122：According to 110/10kV powering mode corresponding 110kV transformer station's seat number and grid structure, calculate 110kV high It is press-fitted the total length of electric line；

For 110kV high voltage distribution network circuit, it is first determined the average distance d110 of 110kV high voltage substation is as follows：In this formula, s is the region gross area, NS¹¹⁰For transformer station's seat number.

Determining d¹¹⁰Afterwards, the number of 110kV incomplete double back chain is selected according to 110kV transformer station seat number：

If 110kV transformer station seat number is less than 3, using the incomplete double back chain of 1 110kV.Now, 110kV circuit Length Len¹¹⁰Evaluation method as follows：Len¹¹⁰=1 × 1.2 × (NS¹¹⁰-1)×d¹¹⁰+2×2×d_out；In formula, on the right side of equal sign 1st coefficient " 1 " of two represents single loop line；2nd coefficient " 1.2 " on the 1st, right side is line nonlinear factor；Right side the 2nd 1st coefficient " 2 " of item represents that external power sources are accessed with 2 loop line roads in terminal station, and according to Dan Huilian, then this coefficient selects the 1, the 2nd Coefficient " 2 " represents 2 transformer stations at 1 chain two ends；d_outRepresent the distance of chain two ends 110kV transformer station and access point outside area.

If 110kV transformer station seat number is 4～6, using 2 110kV double back chains, now, 110kV line length Len²²⁰Evaluation method is as follows：Len²²⁰=1 × 1.2 × (NS¹¹⁰-2)×d¹¹⁰+2×4×d_out；In formula, two on the right side of equal sign 1st coefficient " 1 " represents single loop line；2nd coefficient " 1.2 " on the 1st, right side represents line nonlinear factor；The 2nd, right side 1st coefficient " 2 " represents that external power source is accessed with 2 loop line roads in terminal station, and according to Dan Huilian then this coefficient choosing " 1 ", the 2nd is Number " 4 " represents that the transformer station of totally 4 terminals is both needed to access external electrical source point 2 chains.

S123：Determine the radius of electricity supply of 10kV medium-voltage distribution circuit according to 110kV transformer station seat number, be press-fitted according in 10kV The radius of electricity supply of electric line and time number, calculate the total length of 10kV medium-voltage distribution circuit；

The calculating of the scheme medium-voltage distribution circuit scale that lands vertically with regard to 110/10kV, the radius of electricity supply of 10kV medium-voltage distribution circuit Evaluation method as follows：Wherein, d^MVThe power supply being located for medium-voltage distribution circuit for radius of electricity supply, s The area in region, NS is expressed as 110kV transformer station seat number.

Due to being designed using " 2-1 " looped network, the normal power supply load of every time medium-voltage line is as follows：

In formula, PL is expressed as the normal power supply load of every time medium-voltage line, and I represents electricity Stream, V represents voltage；Coefficient 0.5 is the normal load rate that " 2-1 " looped network allows, and coefficient 0.9 is power factor (PF).

Under 110/10kV powering mode medium-voltage line return number estimation as follows：Wherein, P always bears for region Lotus；PL is the normal power supply load of every time medium-voltage line；Result carry rounds.

The estimation of medium-voltage line total length is as follows：In this formula, factor alpha is trunk The buckling factor of circuit, factor beta is the amplification after design branched line.Then according to different electric pressures it is considered to make somebody a mere figurehead Net and the difference of cable system, determine taking of the amplification after the basic routing line buckling factor of medium-voltage line and meter and branched line Value is as follows：10kV aerial line trunk buckling factor takes 1.3, and braning factor takes 1.5；10kV cable backbone buckling factor takes 1.3, point Prop up coefficient and take 1.2.

S124：Calculate the total length of 110kV high-tension distributing line and the total length sum of 10kV medium-voltage distribution circuit, as The corresponding line size of 110/10kV powering mode.

S130：The relation calculated 110/ of the main transformer capacity of the total load according to power supply area and 110kV transformator 35/10kV transformer station scale, and 35/10kV transformer station scale, determine that the corresponding transformer station of 110/35/10kV powering mode advises Mould, wherein, 35/10kV transformer station scale is the main transformer capacity of load density according to power supply area and 35/10kV transformator Relation or calculated according to the radius of electricity supply of 35/10kV transformer station.In 110/35/10kV powering mode, 110kV becomes It is 35kV voltage that power station is used for 110kV voltage conversion, and also there is 10kV outlet in 110KV transformer station, directly to provide 10kV Voltage.

As a kind of preferred embodiment, as shown in figure 4, step S130：Total load according to power supply area and 110kV become The 110/35/10kV transformer station scale that the main transformer capacity of depressor calculates, and the load density according to power supply area or according to The 35/10kV transformer station scale that the radius of electricity supply of 35/10kV transformer station calculates, determines that 110/35/10kV powering mode is corresponding Transformer station's scale, including：

S131：Calculate the ratio of the main transformer capacity of the total load of power supply area and 110kV transformator, according to ratio with The product of the capacity-load ratio of 110kV transformator, is calculated 110kV transformator number of units；

In 110/35/10kV transformer station, including the 110/35/10kV transformator for 110kV voltage being down to 35kV With the 35/10kV transformator for 35kV voltage is down to 10kV, wherein, 110kV transformation can directly be selected by 110kV transformator Device.Because, under 110/35/10kV powering mode, the radius of electricity supply of 110kV transformer station is 45km, and this Substation Capacity Scale is main Constrained by transformer station's power supply capacity, therefore this Substation Capacity Scale can be according under 110/10kV powering mode, according to service area The scheme of the main transformer capacity of the total load in domain and 110kV transformator is carried out.

S132：According to 110kV transformator number of units, in conjunction with the corresponding relation of transformator number of units and transformer station's seat number, calculate 110kV transformer station seat number；

S133：Determine this 110kV transformator number of units and 110kV transformer station seat number as 110/35/10kV transformer station scale.

110/35/10kV transformer station scale under power supply capacity constraint is mainly subject to main transformer capacity and the confession of 110kV transformator The total load in electric region determines, transformer station's scale includes transformer station's seat number and transformator number of units two parts.Know this 110/35/ In the case of 10kV transformer station scale, cost of investment can be calculated according to this 110/35/10kV transformer station scale, and then select to close Suitable power supply mode.Further, since under 110/35/10kV powering mode, mainly including 110kV transformer station and 35/10kV power transformation Stand two parts, Mei Zuo 110kV transformer station all corresponds to one or Duo Zuo 35/10kV transformer station, 110kV transformer station can be according to supplying electric energy Power, that is, the main transformer capacity of 110kV transformator and the total load of power supply area are calculated.But the power supply of 35/10kV transformer station The determination of scale, then need to be chosen according to power supply capacity or radius of electricity supply.

As a kind of preferred embodiment, as shown in figure 5, step S130：Total load according to power supply area and 110kV become The 110/35/10kV transformer station scale that the main transformer capacity of depressor calculates, and 35/10kV transformer station scale, determine 110/35/ 10kV powering mode corresponding transformer station scale, also includes：

S134：The corresponding powering area of supply district according to Mei Zuo 110kV transformer station and load density, and 35/ The capacity-load ratio of 10kV transformator and main transformer capacity, calculate corresponding with power supply capacity in the supply district of Mei Zuo 110kV transformer station 35/10kV transformator number of units；

The corresponding powering area of supply district according to Mei Zuo 110kV transformer station and load density, can calculate 110kV and become Total load in the supply district in power station；Capacity-load ratio according to 35/10kV transformator and main transformer capacity, can calculate every 35/ The load that 10kV transformator can carry, can carry according to the total load in supply district and every 35/10kV transformator Load, that is, can determine 35/10kV transformator number of units corresponding with power supply capacity in the supply district of Mei Zuo 110kV transformer station.

For example：In the supply district of Mei Zuo 110kV transformer station, the number of units computational methods of 35/10kV transformator are as follows：

Wherein,For 35/10kV transformator number of units, ρ_LoadIt is negative Lotus density,For the main transformer capacity of 35/10kV transformator, NS_110/35/10For 110kV transformer station seat number, supply in 110/35/10kV In power mode, 110kV transformer station can either provide 35kV lead, and 10kV lead also can be provided directly to power；Calculating 35/10kV During transformator number of units, need to exclude the powering area of single seat 110kV transformer station itself, i.e. 314km in formula.Calculate specific During, in load density lower ground area, need to ensureIf meeting in the higher area of load density Following conditionMain transformer capacity for 110kV transformator；Then

S135：According to 35/10kV transformator number of units corresponding with power supply capacity, in conjunction with transformator number of units and transformer station's seat number Between corresponding relation, calculate 35/10kV transformer station corresponding with power supply capacity seat in the supply district of Mei Zuo 110kV transformer station Number；

Wherein, can be calculated according to corresponding 1 transformer station of every 2 transformators, be obtained above-mentioned Mei Zuo 110kV transformer station 35/10kV transformer station corresponding with power supply capacity seat number in supply district.Computing formula is：Wherein, For the 35/10kV transformer station average seat number in the supply district of Mei Zuo 110kV transformer station,For Mei Zuo 110kV transformer station The average number of units of 35/10kV transformator in supply district.

S136：Determine in the supply district of 110kV transformer station 35/10kV transformator number of units corresponding with power supply capacity and 35/10kV transformer station seat number is as 35/10kV transformer station corresponding with power supply capacity in the supply district of Mei Zuo 110kV transformer station Scale.

Determine 35/10kV transformator number of units corresponding with power supply capacity and 35/ in the supply district of Mei Zuo 110kV transformer station 10kV transformer station seat number, you can determine 35/10kV transformer station scale corresponding with power supply capacity such that it is able to according to this 35/ The scale of 10kV transformer station calculates the corresponding cost of investment of transformer station's scale, and then selects suitable powering mode.

And,

S137：The corresponding powering area of supply district according to Mei Zuo 110kV transformer station and Mei Zuo 35/10kV transformer station Radius of electricity supply, calculate 35/10kV transformer station corresponding with radius of electricity supply seat number in the supply district of Mei Zuo 110kV transformer station.

Under 110/35/10kV powering mode, transformer station includes 110kV transformer station and two kinds of 35/10kV transformer station.Power supply The powering area in region deducts the powering area of all 110kV transformer stations, then divided by the power supply face of Mei Zuo 35/10kV transformer station Long-pending, you can to obtain the total 35/10kV transformer station seat number in power supply area, wherein, the power supply half of Mei Zuo 35/10kV transformer station Footpath is 10km, and corresponding powering area is 314km².The computing formula of 35/10kV transformer station seat number is as follows：Wherein,For 35/10kV transformer station corresponding with power supply capacity seat in power supply area Number, NS_110/35/10Seat number for 110kV transformer station in power supply area.

The meter of the average seat number of 35/10kV transformer station corresponding with radius of electricity supply in the supply district of Mei Zuo 110kV transformer station Calculate formula as follows：Wherein,For in the supply district of Mei Zuo 110kV transformer station with confession Electric energy power corresponding 35/10kV transformer station seat number, NS_110/35/10For 110kV transformer station seat number, S is the gross area of power supply area.

S138：According to 35/10kV transformer station corresponding with radius of electricity supply seat number, in conjunction with transformator number of units and transformer station's seat number Corresponding relation, calculate Mei Zuo 110kV transformer station supply district in 35/10kV transformator number of units corresponding with radius of electricity supply. Mei Zuo 35/10kV transformer station can have 2 35/10kV transformators, by this corresponding relation, you can according to corresponding with radius of electricity supply 35/10kV transformer station seat number, calculates 35/10kV transformation corresponding with radius of electricity supply in the supply district of Mei Zuo 110kV transformer station Device number of units.

S139：Determine 35/10kV transformer station corresponding with radius of electricity supply seat number and 35/10kV transformator number of units as every 35/10kV transformer station corresponding with radius of electricity supply scale in the supply district of 110kV transformer station.Corresponding with radius of electricity supply according to this 35/10kV transformer station scale, you can determine the corresponding cost of investment of 35/10kV transformer station scale, and then invested into according to this The corresponding powering mode of this selection.

S1310：How many according to 35/10kV transformer station seat number, choose 35/10kV transformer station corresponding with power supply capacity scale Or 35/10kV transformer station corresponding with radius of electricity supply scale is as the 35/10kV transformer station rule under 110/35/10kV powering mode Mould.

Generally, select a kind of minimum 35/10kV transformer station scale of 35/10kV transformer station seat number as 110/ 35/10kV transformer station scale under 35/10kV powering mode.For example：In concrete calculating process,ChooseWithIn the maximum.

S1311：According to the 110/35/10kV transformer station scale under 110/35/10kV powering mode and 35/10kV power transformation Stand scale, determine 110/35/10kV powering mode corresponding transformer station scale.As the seat number learning 110kV transformer station and every 35/10kV transformer station scale in 110kV transformer station supply district, you can obtain the 35/10kV transformer station in total power supply area Scale.

By above-mentioned calculating 110/35/10kV transformer station scale, including 110kV transformer station seat number and 110kV transformer platform Number, and in the supply district of Mei Zuo 110kV transformer station 35/10kV transformer station scale, 110/35/10kV can be obtained and power All transformer stations seat number under pattern and transformator number of units, i.e. 110/35/10kV powering mode corresponding transformer station scale.Pass through This scale transformer station corresponding with 110/10kV powering mode of 110/35/10kV powering mode corresponding transformer station scale is carried out Relatively, including the comparison of corresponding high voltage substation cost, you can choose the powering mode obtaining high voltage distribution network.

S140：According to 110/35/10kV powering mode corresponding transformer station scale, calculate 110/35/10kV powering mode Corresponding line size.

As shown in fig. 6, this step S140：According to 110/35/10kV powering mode corresponding transformer station scale, calculate 110/ The corresponding line size of 35/10kV powering mode includes：

S141：According to the load density of power supply area, determine the corresponding grid structure of 110/35/10kV powering mode.

For 35kV high voltage distribution network, " 2T " wiring, single-side power Dan Huilian or bilateral source Dan Huilian etc. can be adopted Grid structure wiring.

S142：According to 110/35/10kV powering mode corresponding 110kV transformer station's seat number and grid structure, calculate 110kV The total length of high-tension distributing line.

In 110/35/10kV powering mode, the computing formula of the total length of 110kV high-tension distributing line refers to Fig. 3 institute Show step S122.

S143：According to 35/10kV transformer station seat number and number of units in Mei Zuo 110kV transformer station supply district, calculate every In 110kV transformer station supply district, the average distance of 35/10kV transformer station and circuit return number.

S144：Average distance according to 35/10kV transformer station and circuit return number, calculate the overall length of 35kV high-tension distributing line Degree.

For the calculating of the total length of 35kV high-tension distributing line, it is related to equation below：

First, determine 35kV transformer station seat number in Mei Zuo 110kV transformer station supply districtAnd number of unitsCalculate Formula is as follows：

Result of calculation carry rounds, and secondly, determines every The powering area of 110kV transformer station：S₁₁₀=S/NS¹¹⁰.

Then, it is determined that in the supply district of Mei Zuo 110kV transformer station 35kV transformer station average distanceAs follows：35kV target wiring can be chosen as incomplete chain type wiring or 2T wiring, its line loop number and Line length computational methods are identical with 110kV electric pressure, for the ease of comparing, the middle 35kV target wiring of this research approach All carry out line loop number and length computation according to using 2T wiring, specific as follows：

Because adopting 2T wiring, as follows to 35kV line length estimation mode.Determine that Mei Zuo 110kV transformer station powers first In the range of 35kV circuit return number：Wherein,For 35kV line in Mei Zuo 110kV transformer station supply district Returning of road counts, and k is the 35kV transformator number of units that a loop line road T connects, according to 2 considerations of T main transformer.Result of calculation carry rounds.Then The estimated value of 35kV total line length is：Wherein, Len³⁵For 35kV total line length, NS¹¹⁰For 110kV transformer station seat number.

S145：Main transformer capacity according to 35/10kV transformator and number of units, calculate the total length of 10kV medium-voltage distribution circuit.

In 110kV/35/10kV powering mode, 10kV medium-voltage distribution circuit scale computing formula is as follows：

Wherein,For In 110/35/10kV powering mode, the total length of medium-voltage distribution circuit,For main transformer configuration platform in Mei Zuo 35kV transformer station Number,For 35kV main transformer capacity.

S146：Press in the total length, the total length of 35kV high-tension distributing line and the 10kV that calculate 110kV high-tension distributing line The total length sum of distribution line, as the corresponding line size of 110/35/10kV powering mode.

By calculating the corresponding line size of 110/35/10kV powering mode, 110/ can be calculated according to this line size Circuit size investment cost in 35/10kV powering mode, thus combine transformer station size investment cost calculation 110/35/10kV supply The corresponding cost of investment of power mode.

S150：According to the relation between transformer station's scale, line size and power distribution network cost of investment, calculate respectively in load Under same load density in density range, 110/10kV powering mode corresponding power distribution network cost of investment and 110/35/10kV power Pattern corresponding power distribution network cost of investment；Wherein, power distribution network cost of investment includes cost of investment and transformer station's rule of line size The cost of investment of mould.

Preferably, step S150：According to the relation between load density, transformer station's scale and high voltage substation cost, count respectively Calculate 110/10kV powering mode corresponding high voltage substation cost and the corresponding high pressure of 110/35/10kV powering mode under load density Transformer station's cost, including：According to relational model： Calculate 110/10kV powering mode corresponding power distribution network cost of investment and the corresponding power distribution network of 110/35/10kV powering mode respectively Cost of investment；Wherein, C_munRepresent power distribution network cost of investment, C_SUBRepresent transformer station's size investment cost, C_lenRepresent line size Cost of investment, C^kIt is expressed as every high voltage substation cost, k is expressed as electric pressure；NS^kIt is expressed as the corresponding change of electric pressure Power station seat number, NT^kIt is expressed as electric pressure corresponding transformator number of units,It is expressed as electric pressure corresponding maximum transformation Device number of units, Mo represents circuit unit price, Len^kRepresent the corresponding total line length of electric pressure, λ is the corresponding throwing of transformer station's seat number Money cost proportion in transformer station's size investment cost, λ can use 30 to 80 it is preferable that λ=60；.

Wherein, electric pressure k includes 110 and 35 two kind, such as in 110/35/10kV powering mode, 110/35/10kV The corresponding electric pressure of transformator is the electric pressure of 110,35/10kV transformator is 35；Calculating the corresponding change of powering mode During power plant scale, need to calculate the corresponding transformator of each electric pressure and transformer station in this powering mode.Due to transformer platform Number NT^kMay be odd number, and the corresponding relation according to transformator number of units and transformer station's seat number, Mei Zuo transformer station 2 transformations of correspondence Device, therefore, maximum transformator number of unitsMore than or equal to NT^k；If such as transformator number of units NT^k=9, corresponding transformer station seat Number carry rounds NS^k=5, maximum transformator number of units

110/10kV powering mode or 110/35/10kV powering mode corresponding power supply scale are all by power supply capacity or confession Electric radius calculation gets, power supply capacity calculates the method for power supply scale and radius of electricity supply calculate the method for power supply scale all with power The load density in region is relevant.Under different load density, 110/10kV powering mode corresponding high voltage substation cost and 110/35/10kV powering mode corresponding high voltage substation cost is different.Learnt by calculating, in the load density of power supply area During less than a certain load density threshold value, 110/35/10kV powering mode corresponding high voltage substation cost is less than 110/10kV and supplies Power mode corresponding high voltage substation cost；When the load density of power supply area is more than or equal to this load density threshold value, 110/35/10kV powering mode corresponding high voltage substation cost is more than or equal to the corresponding high voltage variable of 110/10kV powering mode Power station cost, therefore, after knowing load density, you can determines selected which kind of powering mode.

S160：According to power distribution network cost of investment, select 110/10kV powering mode or 110/35/10kV powering mode conduct The powering mode of high voltage distribution network.

The system of selection of high voltage distribution network powering mode provided in an embodiment of the present invention, according to the total load of power supply area, Relation between load density and the main transformer capacity of transformator, or the radius of electricity supply according to transformer station and the power supply area gross area Relation, determines 110/10kV powering mode corresponding transformer station scale and the corresponding power transformation of 110/35/10kV powering mode respectively Stand scale, and line size corresponding with powering mode is calculated according to transformer station's scale, relevant with load density by basis Relational model between transformer station's scale, line size and power distribution network cost of investment, selects cost of investment under same load density Less transformer station's scale is as the powering mode of power distribution network.This programme has the power distribution network powering mode selection strategy of maturation, There is the electric pressure unreasonable, repeated construction of setting and investment so as to reduce in actual Electric Power Network Planning and process of construction Situation about wasting.Wherein power distribution network cost of investment includes transformer station's size investment cost and line size cost of investment.

Based on same inventive concept, the embodiment of the present application additionally provides the selection system of high voltage distribution network powering mode, by It is the system of selection of the high voltage distribution network powering mode in the embodiment of the present application in the corresponding method of system, and this system solves The principle of problem is similar to method, and the enforcement of therefore this system may refer to the enforcement of method, repeats no more in place of repetition.

Fig. 7 is a kind of selection system of the high voltage distribution network powering mode shown in the present invention one exemplary embodiment, such as Fig. 7 Shown, the selection system of this high voltage distribution network powering mode, including：

First transformer station's scale determining module 701, for the main transformer of the total load according to power supply area and 110kV transformator Capacity, or the gross area of the radius of electricity supply according to 110kV transformer station and power supply area, determine that 110/10kV powering mode corresponds to Transformer station's scale.

First line scale computing module 702, for calculating according to 110/10kV powering mode corresponding transformer station scale The corresponding line size of 110/10kV powering mode；

Second transformer station's scale determining module 703, for the main transformer of the total load according to power supply area and 110kV transformator The 110/35/10kV transformer station scale of calculation of capacity, and 35/10kV transformer station scale, determine 110/35/10kV powering mode Corresponding transformer station scale, wherein, 35/10kV transformer station scale is the load density and 35/10kV transformation according to power supply area The relation of the main transformer capacity of device or be calculated according to the radius of electricity supply of 35/10kV transformer station.

Second line size computing module 704, for according to 110/35/10kV powering mode corresponding transformer station scale, Calculate the corresponding line size of 110/35/10kV powering mode.

Cost calculation module 705, for according to the relation between transformer station's scale and high voltage substation cost, calculating respectively 110/10kV powering mode corresponding high voltage substation cost and the corresponding high pressure of 110/35/10kV powering mode under load density Transformer station's cost.Preferably, cost calculation module 103, specifically for according to relational model： Calculate the corresponding power distribution network of 110/10kV powering mode respectively Cost of investment and 110/35/10kV powering mode corresponding power distribution network cost of investment；Wherein, C_munRepresent power distribution network cost of investment, C_SUBRepresent transformer station's size investment cost, C_lenRepresent line size cost of investment, C^kIt is expressed as every high voltage substation cost, K is expressed as electric pressure；NS^kIt is expressed as electric pressure corresponding transformer station seat number, NT^kIt is expressed as the corresponding transformation of electric pressure Device number of units,It is expressed as electric pressure corresponding maximum transformator number of units, Mo represents circuit unit price, Len^kRepresent circuit overall length Degree, λ is the corresponding cost of investment accounting of transformer station's seat number.

Powering mode selecting module 706, for according to high voltage substation cost, selecting 110/10kV powering mode or 110/ 35/10kV powering mode is as the powering mode of high voltage distribution network.

The selection system of high voltage distribution network powering mode provided in an embodiment of the present invention, according to the total load of power supply area, Relation between load density and the main transformer capacity of transformator, or the radius of electricity supply according to transformer station and the power supply area gross area Relation, determines 110/10kV powering mode corresponding transformer station scale and the corresponding power transformation of 110/35/10kV powering mode respectively Stand scale, and line size corresponding with powering mode is calculated according to transformer station's scale, relevant with load density by basis Relational model between transformer station's scale, line size and power distribution network cost of investment, selects cost of investment under same load density Less transformer station's scale is as the powering mode of power distribution network.This programme has the power distribution network powering mode selection strategy of maturation, There is the electric pressure unreasonable, repeated construction of setting and investment so as to reduce in actual Electric Power Network Planning and process of construction Situation about wasting.Wherein power distribution network cost of investment includes transformer station's size investment cost and line size cost of investment.

Preferably, as shown in figure 8, first transformer station's scale determining module 701 in Fig. 7 embodiment, including：

First transformator number of units calculating sub module 7011, for calculating the total load of power supply area and 110kV transformator The ratio of main transformer capacity, according to the product of ratio and the capacity-load ratio of 110kV transformator, is calculated corresponding with power supply capacity 110kV transformator number of units；

First transformer station's seat number calculating sub module 7012, for the platform according to 110kV transformator corresponding with power supply capacity Number, in conjunction with the corresponding relation of transformator number of units and transformer station's seat number, is calculated 110kV transformer station corresponding with power supply capacity seat Number；

First transformer station's scale determination sub-module 7013, for determining 110kV transformator number of units corresponding with power supply capacity It is 110/10kV transformer station corresponding with power supply capacity scale with 110kV transformer station seat number；

Or,

Second transformer station's seat number calculating sub module 7014, calculates single seat for the radius of electricity supply according to 110kV transformer station The powering area of 110kV transformer station, closes between the powering area according to single seat 110kV transformer station and the gross area of power supply area System, is calculated 110kV transformer station corresponding with radius of electricity supply seat number；

Second transformator number of units calculating sub module 7015, for basis 110kV transformer station corresponding with radius of electricity supply seat number, In conjunction with the corresponding relation between transformator number of units and transformer station's seat number, it is calculated 110kV transformator corresponding with radius of electricity supply Number of units；

Second transformer station's scale determination sub-module 7016, for determining 110kV transformator number of units corresponding with radius of electricity supply It is 110/35/10kV transformer station corresponding with radius of electricity supply scale with 110kV transformer station seat number；

First transformer station's scale chooses submodule 7017, for according to 110kV transformer station seat number, choosing and power supply capacity pair The 110/35/10kV transformer station scale answered or selection 110/10kV transformer station corresponding with radius of electricity supply scale are as 110/10kV Powering mode corresponding transformer station scale.

Wherein, as shown in figure 9, first line scale computing module 702 in embodiment illustrated in fig. 7, specifically include：

First grid structure determination sub-module 7021, for the load density according to power supply area, determines that 110/10kV supplies The corresponding grid structure of power mode；

First line length computation submodule 7022, for according to 110/10kV powering mode corresponding 110kV transformer station Seat number and grid structure, calculate the total length of 110kV high-tension distributing line；

Second line length calculating sub module 7023, for determining 10kV middle voltage distribution line according to 110kV transformer station seat number The radius of electricity supply on road, the radius of electricity supply according to 10kV medium-voltage distribution circuit and time number, calculate the overall length of 10kV medium-voltage distribution circuit Degree；

First line scale determination sub-module 7024, for calculating in the total length and 10kV of 110kV high-tension distributing line It is press-fitted the total length sum of electric line, as the corresponding line size of 110/10kV powering mode.

Wherein, as shown in Figure 10, second transformer station's scale determining module 703 in embodiment illustrated in fig. 7, including：

3rd transformator number of units calculating sub module 7031, for calculating the total load of power supply area and 110kV transformator The ratio of main transformer capacity, according to the product of ratio and the capacity-load ratio of 110kV transformator, is calculated 110kV transformator number of units；

3rd transformer station's seat number calculating sub module 7032, for according to 110kV transformator number of units, in conjunction with transformator number of units with Corresponding relation between transformer station's seat number, calculates 110kV transformer station seat number；

3rd transformer station's scale determination sub-module 7033, for determining 110kV transformator number of units and 110kV transformer station seat number For 110/35/10kV transformer station scale.

As a kind of preferred embodiment, as shown in figure 11, second transformer station's scale in embodiment illustrated in fig. 7 determines mould Block 703, also includes：

4th transformator number of units calculating sub module 7034, corresponding for the supply district according to Mei Zuo 110kV transformer station Powering area and load density, and the capacity-load ratio of 35/10kV transformator and main transformer capacity, calculate Mei Zuo 110kV transformer station 35/10kV transformator number of units corresponding with power supply capacity in supply district；

4th transformer station's seat number calculating sub module 7035, for according to 35/10kV transformer platform corresponding with power supply capacity Number, in conjunction with the corresponding relation between transformator number of units and transformer station's seat number, calculate in the supply district of Mei Zuo 110kV transformer station with Power supply capacity corresponding 35/10kV transformer station seat number；

4th transformer station's scale determination sub-module 7036, for determining 35/10kV transformer platform corresponding with power supply capacity Number and the interior 35/10kV power transformation corresponding with power supply capacity of the supply district that 35/10kV transformer station seat number is Mei Zuo 110kV transformer station Stand scale；

And, the 5th transformer station's seat number calculating sub module 7037, for the supply district pair according to Mei Zuo 110kV transformer station The powering area answered and the radius of electricity supply of Mei Zuo 35/10kV transformer station, calculate Mei Zuo 110kV transformer station supply district in Radius of electricity supply corresponding 35/10kV transformer station seat number；

5th transformator number of units calculating sub module 7038, for according to 35/10kV transformer station corresponding with radius of electricity supply seat Number, in conjunction with the corresponding relation of transformer station's seat number and transformator number of units, calculates in the supply district of Mei Zuo 110kV transformer station and power supply Radius corresponding 35/10kV transformator number of units；

5th transformer station's scale determination sub-module 7039, for determining 35/10kV transformer station corresponding with radius of electricity supply seat Number and the interior 35/10kV power transformation corresponding with radius of electricity supply of the supply district that 35/10kV transformator number of units is Mei Zuo 110kV transformer station Stand scale；

Second transformer station's scale chooses submodule 70310, for how many according to 35/10kV transformer station seat number, choose and supplies Electric energy power corresponding 35/10kV transformer station's scale or 35/10kV transformer station corresponding with radius of electricity supply scale are as 110/35/ 35/10kV transformer station scale under 10kV powering mode；

6th transformer station's scale determination sub-module 70311, for according to 110/35/10kV transformer station scale and 35/ 10kV transformer station scale, determines 110/35/10kV powering mode corresponding transformer station scale.

As shown in figure 12, the second line size computing module 704 in embodiment illustrated in fig. 7, including：

Second grid structure determination sub-module 7041, for the load density according to power supply area, determines 110/35/10kV The corresponding grid structure of powering mode；

Tertiary circuit length computation submodule 7042, for according to the corresponding 110kV power transformation of 110/35/10kV powering mode Stand seat number and grid structure, calculate the total length of 110kV high-tension distributing line；

Distance and time number calculating sub module 7043, for according to 35/10kV power transformation in Mei Zuo 110kV transformer station supply district Stand seat number and number of units, calculate the average distance of 35/10kV transformer station and circuit in Mei Zuo 110kV transformer station supply district and return number；

4th line length calculating sub module 7044, returns number for the average distance according to 35/10kV transformer station and circuit, Calculate the total length of 35kV high-tension distributing line；

5th line length calculating sub module 7045, for the main transformer capacity according to 35/10kV transformator and number of units, calculates The total length of 10kV medium-voltage distribution circuit；

Second line size determination sub-module 7046, for calculating total length, the 35kV high pressure of 110kV high-tension distributing line The total length sum of the total length of distribution line and 10kV medium-voltage distribution circuit, corresponding as 110/35/10kV powering mode Line size.

Each embodiment in this specification is all described by the way of going forward one by one, identical similar portion between each embodiment Divide mutually referring to what each embodiment stressed is the difference with other embodiments.

Invention described above embodiment, does not constitute limiting the scope of the present invention.Any in the present invention Spirit and principle within modification, equivalent and improvement of being made etc., should be included within the scope of the present invention.

Claims

1. a kind of system of selection of high voltage distribution network powering mode is it is characterised in that include：

The relation of the main transformer capacity of the total load according to power supply area and 110kV transformator, or the confession according to 110kV transformer station The relation of the gross area of electric radius and power supply area, determines 110/10kV powering mode corresponding transformer station scale；

110/10kV powering mode corresponding circuit rule are calculated according to described 110/10kV powering mode corresponding transformer station scale Mould；

The calculated 110/35/10kV of relation of the main transformer capacity of the total load according to power supply area and 110kV transformator becomes Power plant scale, and 35/10kV transformer station scale, determine 110/35/10kV powering mode corresponding transformer station scale, wherein, Described 35/10kV transformer station scale according to the relation of the load density of power supply area and the main transformer capacity of 35/10kV transformator or Person is calculated according to the radius of electricity supply of 35/10kV transformer station；

According to described 110/35/10kV powering mode corresponding transformer station scale, calculate 110/35/10kV powering mode corresponding Line size；

According to the relation between transformer station's scale, line size and power distribution network cost of investment, calculate respectively under same load density 110/10kV powering mode corresponding power distribution network cost of investment power distribution network corresponding with 110/35/10kV powering mode is invested into This；

According to described power distribution network cost of investment, select described 110/10kV powering mode or described 110/35/10kV powering mode Powering mode as high voltage distribution network.

2. high voltage distribution network powering mode according to claim 1 system of selection it is characterised in that described according to power supply The relation of the main transformer capacity of the total load in region and 110kV transformator, or the radius of electricity supply according to 110kV transformer station and power supply The relation of the gross area in region, determines 110/10kV powering mode corresponding transformer station scale, including：

Calculate the total load of described power supply area and the ratio of the main transformer capacity of 110kV transformator, according to described ratio and 110kV The product of the capacity-load ratio of transformator, is calculated 110kV transformator number of units corresponding with power supply capacity；

According to described 110kV transformator number of units corresponding with power supply capacity, corresponding with transformer station seat number in conjunction with transformator number of units Relation, is calculated 110kV transformer station corresponding with power supply capacity seat number；

Determine described 110kV transformator number of units corresponding with power supply capacity and 110kV transformer station seat number as with power supply capacity pair The 110/10kV transformer station scale answered；

Radius of electricity supply according to described 110kV transformer station calculates the powering area of single seat 110kV transformer station, according to described single seat Relation between the gross area of the powering area of 110kV transformer station and described power supply area, is calculated corresponding with radius of electricity supply 110kV transformer station seat number；

According to described 110kV transformer station corresponding with radius of electricity supply seat number, in conjunction with described transformator number of units and transformer station's seat number Corresponding relation, is calculated 110kV transformator number of units corresponding with radius of electricity supply；

Determine that described 110kV transformator number of units corresponding with radius of electricity supply and 110kV transformer station seat number are corresponding with radius of electricity supply 110/10kV transformer station scale；

According to 110kV transformer station seat number, choose 110/10kV transformer station scale corresponding with power supply capacity or choose and power supply half Footpath corresponding 110/10kV transformer station scale is as described 110/10kV powering mode corresponding transformer station scale.

3. high voltage distribution network powering mode according to claim 1 system of selection it is characterised in that described according to power supply The relation calculated 110/35/10kV transformer station scale of the main transformer capacity of the total load in region and 110kV transformator, and 35/10kV transformer station scale, determines 110/35/10kV powering mode corresponding transformer station scale, including：

Calculate the total load of described power supply area and the ratio of the main transformer capacity of 110kV transformator, according to described ratio and 110kV The product of the capacity-load ratio of transformator, is calculated 110kV transformator number of units；

4. high voltage distribution network powering mode according to claim 3 system of selection it is characterised in that described according to power supply The relation calculated 110/35/10kV transformer station scale of the main transformer capacity of the total load in region and 110kV transformator, and 35/10kV transformer station scale, determines 110/35/10kV powering mode corresponding transformer station scale, also includes：

The corresponding powering area of supply district according to Mei Zuo 110kV transformer station and load density, and 35/10kV transformator Capacity-load ratio and main transformer capacity, calculate 35/10kV transformator corresponding with power supply capacity in the supply district of Mei Zuo 110kV transformer station Number of units；

According to described 35/10kV transformator number of units corresponding with power supply capacity, in conjunction between transformator number of units and transformer station's seat number Corresponding relation, calculate 35/10kV transformer station corresponding with power supply capacity seat number in the supply district of Mei Zuo 110kV transformer station；

Determine 35/10kV transformator number of units corresponding with power supply capacity and 35/10kV in the supply district of described 110kV transformer station Transformer station's seat number is as 35/10kV transformer station corresponding with power supply capacity scale in the supply district of Mei Zuo 110kV transformer station；

And,

The power supply of the corresponding powering area of supply district according to Mei Zuo 110kV transformer station and Mei Zuo 35/10kV transformer station half Footpath, calculates 35/10kV transformer station corresponding with radius of electricity supply seat number in the supply district of Mei Zuo 110kV transformer station；

According to described 35/10kV transformer station corresponding with radius of electricity supply seat number, right in conjunction with transformator number of units and transformer station seat number Should be related to, calculate 35/10kV transformator number of units corresponding with radius of electricity supply in the supply district of Mei Zuo 110kV transformer station；

Determine described 35/10kV transformer station corresponding with radius of electricity supply seat number and 35/10kV transformator number of units as every 110kV 35/10kV transformer station corresponding with radius of electricity supply scale in the supply district of transformer station；

How many according to 35/10kV transformer station seat number, choose described 35/10kV transformer station scale or described corresponding with power supply capacity 35/10kV transformer station corresponding with radius of electricity supply scale is advised as the 35/10kV transformer station under 110/35/10kV powering mode Mould；

According to described 110/35/10kV transformer station scale and described 35/10kV transformer station scale, determine that 110/35/10kV supplies Power mode corresponding transformer station scale.

5. high voltage distribution network powering mode according to claim 1 system of selection it is characterised in that described according to power transformation The relation stood between scale, line size and power distribution network cost of investment, calculates 110/10kV under same load density respectively and powers Pattern corresponding power distribution network cost of investment and 110/35/10kV powering mode corresponding power distribution network cost of investment, including：

According to relational model： Calculate 110/10kV powering mode corresponding power distribution network cost of investment and the corresponding power distribution network of 110/35/10kV powering mode respectively Cost of investment；Wherein, C_munRepresent power distribution network cost of investment, C_SUBRepresent transformer station's size investment cost, C_lenRepresent line size Cost of investment, C^kIt is expressed as every high voltage substation cost, k is expressed as electric pressure；NS^kIt is expressed as the corresponding change of electric pressure Power station seat number, NT^kIt is expressed as electric pressure corresponding transformator number of units,It is expressed as electric pressure corresponding maximum transformator Number of units, Mo represents circuit unit price, Len^kRepresent the corresponding total line length of electric pressure, λ is the corresponding investment of transformer station's seat number Cost accounting.

6. high voltage distribution network powering mode according to claim 1 system of selection it is characterised in that described according to 110/ 10kV powering mode corresponding transformer station scale calculates the corresponding line size of 110/10kV powering mode, including：

According to 110/10kV powering mode corresponding 110kV transformer station's seat number and grid structure, calculate 110kV high-tension distributing line Total length；

Determine the radius of electricity supply of 10kV medium-voltage distribution circuit according to described 110kV transformer station seat number, be press-fitted according in described 10kV The radius of electricity supply of electric line and time number, calculate the total length of 10kV medium-voltage distribution circuit；

Calculate the total length of described 110kV high-tension distributing line and the total length sum of 10kV medium-voltage distribution circuit, as described The corresponding line size of 110/10kV powering mode.

7. a kind of selection system of high voltage distribution network powering mode is it is characterised in that include：

The first transformer station's scale determining module, for the main transformer capacity of the total load according to power supply area and 110kV transformator Relation, or the relation of the gross area of the radius of electricity supply according to 110kV transformer station and power supply area, determine that 110/10kV powers mould Formula corresponding transformer station scale；

First line scale computing module, for calculating 110/ according to described 110/10kV powering mode corresponding transformer station scale The corresponding line size of 10kV powering mode；

Second transformer station's scale determining module, the main transformer for the total load according to described power supply area and 110kV transformator holds The relation calculated 110/35/10kV transformer station scale of amount, and 35/10kV transformer station scale, determine 110/35/10kV Powering mode corresponding transformer station scale, wherein, described 35/10kV transformer station scale according to the load density of power supply area and The relation of the main transformer capacity of 35/10kV transformator or be calculated according to the radius of electricity supply of 35/10kV transformer station；

Second line size computing module, for according to described 110/35/10kV powering mode corresponding transformer station scale, calculating The corresponding line size of 110/35/10kV powering mode；

Cost calculation module, for according to the relational model between transformer station's scale, line size and power distribution network cost of investment, dividing 110/10kV powering mode corresponding power distribution network cost of investment and 110/ under same load density in other calculated load density range 35/10kV powering mode corresponding power distribution network cost of investment；

Powering mode selecting module, for according to described power distribution network cost of investment, selecting described 110/10kV powering mode or institute State 110/35/10kV powering mode as the powering mode of high voltage distribution network.

8. the selection system of high voltage distribution network powering mode according to claim 7 is it is characterised in that described first power transformation Scale of standing determining module, including：

First transformator number of units calculating sub module, for calculating the total load of described power supply area and the main transformer of 110kV transformator The ratio of capacity, according to the product of described ratio and the capacity-load ratio of 110kV transformator, is calculated corresponding with power supply capacity 110kV transformator number of units；

First transformer station's seat number calculating sub module, for the number of units according to described 110kV transformator corresponding with power supply capacity, ties Close the corresponding relation of transformator number of units and transformer station's seat number, be calculated 110kV transformer station corresponding with power supply capacity seat number；

First transformer station's scale determination sub-module, for determine described 110kV transformator number of units corresponding with power supply capacity and 110kV transformer station seat number is as 110/10kV transformer station corresponding with power supply capacity scale；

Second transformer station's seat number calculating sub module, calculates single seat 110kV for the radius of electricity supply according to described 110kV transformer station and becomes The powering area in power station, closes between the powering area according to described single seat 110kV transformer station and the gross area of described power supply area System, is calculated 110kV transformer station corresponding with radius of electricity supply seat number；

Second transformator number of units calculating sub module, for according to described 110kV transformer station corresponding with radius of electricity supply seat number, in conjunction with Described transformator number of units and the corresponding relation of transformer station's seat number, are calculated 110kV transformator number of units corresponding with radius of electricity supply；

Second transformer station's scale determination sub-module, for determine described 110kV transformator number of units corresponding with radius of electricity supply and 110kV transformer station seat number is 110/35/10kV transformer station corresponding with radius of electricity supply scale；

First transformer station's scale chooses submodule, for according to 110kV transformer station seat number, choosing corresponding with power supply capacity 110/ 10kV transformer station scale or choose 110/10kV transformer station corresponding with radius of electricity supply scale and power mould as described 110/10kV Formula corresponding transformer station scale.

9. the selection system of high voltage distribution network powering mode according to claim 7 is it is characterised in that described second power transformation Scale of standing determining module, including：

4th transformator number of units calculating sub module, for the corresponding powering area of supply district according to Mei Zuo 110kV transformer station And load density, and the capacity-load ratio of 35/10kV transformator and main transformer capacity, calculate the supply district of Mei Zuo 110kV transformer station Interior 35/10kV transformator number of units corresponding with power supply capacity；

4th transformer station's seat number calculating sub module, for according to described 35/10kV transformator number of units corresponding with power supply capacity, tying Close the corresponding relation between transformator number of units and transformer station's seat number, calculate in the supply district of Mei Zuo 110kV transformer station and power supply Ability corresponding 35/10kV transformer station seat number；

4th transformer station's scale determination sub-module, for determine in the supply district of described 110kV transformer station with power supply capacity pair The 35/10kV transformator number of units answered and 35/10kV transformer station seat number as in the supply district of Mei Zuo 110kV transformer station with power supply Ability corresponding 35/10kV transformer station scale；And,

5th transformer station's seat number calculating sub module, for the corresponding powering area of supply district according to Mei Zuo 110kV transformer station And the radius of electricity supply of Mei Zuo 35/10kV transformer station, calculate corresponding with radius of electricity supply in the supply district of Mei Zuo 110kV transformer station 35/10kV transformer station seat number；

5th transformator number of units calculating sub module, for according to described 35/10kV transformer station corresponding with radius of electricity supply seat number, tying Close the corresponding relation of transformator number of units and transformer station's seat number, calculate in the supply district of Mei Zuo 110kV transformer station and radius of electricity supply Corresponding 35/10kV transformator number of units；

5th transformer station's scale determination sub-module, for determine described 35/10kV transformer station corresponding with radius of electricity supply seat number and 35/10kV transformator number of units is as 35/10kV transformer station corresponding with radius of electricity supply in the supply district of Mei Zuo 110kV transformer station Scale；

Second transformer station's scale chooses submodule, for how many according to 35/10kV transformer station seat number, chooses described and power supply capacity Corresponding 35/10kV transformer station scale or described 35/10kV transformer station corresponding with radius of electricity supply scale are as 110/35/10kV 35/10kV transformer station scale under powering mode；

6th transformer station's scale determination sub-module, for according to described 110/35/10kV transformer station scale and described 35/10kV Transformer station's scale, determines 110/35/10kV powering mode corresponding transformer station scale.

10. the selection system of high voltage distribution network powering mode according to claim 7 is it is characterised in that described First Line Road scale computing module, including：

First grid structure determination sub-module, for the load density according to power supply area, determines that described 110/10kV powers mould The corresponding grid structure of formula；

First line length computation submodule, for according to 110/10kV powering mode corresponding 110kV transformer station's seat number and net Frame structure, calculates the total length of 110kV high-tension distributing line；

Second line length calculating sub module, for determining 10kV medium-voltage distribution circuit according to described 110kV transformer station seat number Radius of electricity supply, the radius of electricity supply according to described 10kV medium-voltage distribution circuit and the overall length returning number calculating 10kV medium-voltage distribution circuit Degree；

First line scale determination sub-module, is press-fitted for calculating in the total length of described 110kV high-tension distributing line and 10kV The total length sum of electric line, as the corresponding line size of described 110/10kV powering mode.