CN103617570A - Geographical factor-involved automatic site selection method for transformer substation - Google Patents

Abstract

The invention discloses a geographical factor-involved automatic site selection method for a transformer substation. The method comprises the following steps: collecting site selection data; giving an initial solution; selecting relevant candidate blocks of each subregion; carrying out improved single median location on each sheet; judging whether the accuracy is met; judging whether the maximal number of iteration steps is achieved or not; resetting the initial solution and the like. By adopting the geographical factor-involved automatic site selection method for the transformer substation provided by the invention, a method for processing site selection of the transformer substation of considering geographical information in power network planning in a manner of a database is provided aiming at the problem in site selection of the transformer substation in existing power network planning. By adopting the method, the validity, the economical efficiency and the rationality of site selection of the transformer substation in the power network planning can be greatly improved. By adopting the geographical factor-involved automatic site selection method, full-automatic site selection can be carried out on the basis of price of land, and the region in which the station cannot be built can be automatically avoided.

Description

A kind of transformer station's automatic addressing method of taking into account geographic factor

Technical field

The invention belongs to Electric Power Network Planning technical field, particularly relate to a kind of transformer station's automatic addressing method of taking into account geographic factor.

Background technology

In Electric Power Network Planning, substation site selection is an element task, and it take Spatial Load Forecasting result as foundation, determines the position of transformer substation construction in target year planning region.Substation site selection plays a part to form a connecting link in Electric Power Network Planning flow process, whether addressing is reasonable, following power grid construction, outlet layout, network structure are played to vital effect, and therefore in substation site selection process, reasonable consideration actual geographic information factor just becomes the prerequisite whether site selecting method can meet Practical Project demand.Current substation site selection method can be divided into following a few class with regard to how considering geography information factor:

(1) disregard in early days the site selecting method of geographic factor.The early stage algorithm of this class mainly studies how all kinds of optimization methods are applied to substation site selection field, and the method for also not considering arrives the application of Practical Project, still in theoretical research stage;

(2) can carry out automatic search addressing, but can only dodge the region of can not building a station, cannot consider the site selecting method of each plot difference.These class methods are applied various optimized algorithms planning region are carried out to automatic addressing, when website is fallen can not build a station region time, such as road, lake etc., by website just proximad the periphery region of can building a station move, but cannot investigate the land price difference between each plot, can only dodge the region of can not building a station;

(3) two stages addressing scheme, these class methods first utilize the optimized algorithm of not considering geography information to carry out addressing on a large scale, then by investigating each plot geography information factor, selected website are adjusted again.These class methods are investigated geography information after addressing again, and computational accuracy and automaticity are not high.

Can find out, all there are various weak points in current substation site selection method, also do not have automatically to identify the site selecting method that plot geography information is carried out full-automatic extensive search in the process of considering geography information factor.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of transformer station's automatic addressing method of taking into account geographic factor.

In order to achieve the above object, transformer station's automatic addressing method of taking into account geographic factor provided by the invention comprises the following step of carrying out in order:

The S01 stage of step 1, collection addressing data: gather the relevant geography information that relates to substation site selection, as addressing data;

The S02 stage of step 2, given initial solution: the initial solution that application transportation model and the given website of single meta site selection model distribute;

Step 3, choose S03 stage in every subregion correlation candidate plot: application level line principle, plot is screened, select and need the candidate plot investigated;

Step 4, to every S04 stage of improving single meta addressing: because ground block message is to describe by each apex coordinate in plot, so by each border property constraint and this plot land price information in relevant plot are all considered simultaneously, and calculate;

Step 5, judge whether to meet S05 stage of precision: the middle site of calculating every load, and judge single in each sheet load subregion in site with the site of this sheet load subregion apart from whether little of presetting numerical value, if judgment result is that "Yes", addressing finishes; Otherwise enter next step S06 stage;

Step 6, judge whether to reach S06 stage of greatest iteration step number: judge the current maximum iteration time that whether arrives setting, if judgment result is that "Yes", addressing finishes; Otherwise next step enters the S07 stage;

Step 7, reset S07 stage of initial solution: using resulting addressing result of S04 stage as new preliminary initial solution, and upgrade iterations, then reenter the S02 stage, proceed iterative computation.

At S02, in the stage, the step of the initial solution that described given website distributes is as follows:

(2.1) preliminary given initial solution, what take capacity maximum treats that selective calling type is as reference, and existing substation capacity is made as to the max cap. after can increase-volume, according to a planning year load capacity, existing substation capacity, asks for and needs the number n of newly-built station; Ask site in the list of all loads; Take this point is the center of circle, and this point is that radius is justified to the bee-line on border, planning region, and initial website is distributed and is spacedly distributed on this circle;

(2.2) application transportation model, to load burst;

(2.3) every load is carried out to single meta addressing;

(2.4) iteration can converge on middle site, utilizes single meta site selection model, to having divided the load of sheet to carry out respectively single meta addressing in step (2.2), thereby obtains n new site, the initial solution using this n new site as next step.

At S04, in the stage, described calculating concrete grammar is:

(4.1) take out the optimum position of building a station, to the region of can not building a station, owing to it not being carried out to Parcel division, so the single meta site selection model after improving is only calculated ready-portioned plot;

(4.2), after application enhancements list meta method is calculated, whether each newly-built station, according to its concrete loading condition adjustment type of building a station, is detected to can the newly-built capacity less selective calling type for the treatment of; To existing transformer station, adopt same method to detect and whether need increase-volume;

Described improvement list meta addressing is calculated to utilize and is improved single meta site selection model, on the basis of describing, considers land price factor in step 2 list meta site selection model, and has increased the border property constraint in plot, and its modelling is as follows:

$\left\{\begin{array}{c}\min C=\mathrm{\&gamma;}\&CenterDot;\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j{d}_j+S_i\\ d_j=\sqrt{{\left({x-x}_j\right)}^2+{\left({y-y}_j\right)}^2}\\ y=\mathrm{ax}+b\\ x_1<x<x_2\end{array}\right.$

S wherein _ifor land price, y=ax+b is brought into

then x is differentiated, making its derivative is 0, tries to achieve optimum solution, then by following formula $x=(\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j(x_j+{\mathrm{ay}}_j-\mathrm{ab})/d_j)/(\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j(1+a^2)/d_j)$ Further filter out optimum solution.

Transformer station's automatic addressing method of taking into account geographic factor provided by the invention, for the problem existing in current Electric Power Network Planning substation site selection, proposes a kind of mode with database and processes the method for considering the substation site selection of geography information in Electric Power Network Planning.The method can improve validity, economy, the rationality of substation site selection in Electric Power Network Planning greatly.

The present invention can carry out full-automatic addressing based on land price, and can automatically dodge the region of can not building a station.

Accompanying drawing explanation

Fig. 1 is the process flow diagram of taking into account transformer station's automatic addressing method of geographic factor provided by the invention.

Embodiment

Below in conjunction with the drawings and specific embodiments, transformer station's automatic addressing method of taking into account geographic factor provided by the invention is elaborated.

As shown in Figure 1, transformer station's automatic addressing method of taking into account geographic factor provided by the invention comprises the following step of carrying out in order:

The S01 stage of step 1, collection addressing data: gather the relevant geography information that relates to substation site selection, as addressing data;

The S02 stage of step 2, given initial solution: the initial solution that application transportation model and the given website of single meta site selection model distribute;

Step 3, choose S03 stage in every subregion correlation candidate plot: application level line principle, plot is screened, select and need the candidate plot investigated;

Step 4, to every S04 stage of improving single meta addressing: because ground block message is to describe by each apex coordinate in plot, so by each border property constraint and this plot land price information in relevant plot are all considered simultaneously, and calculate;

Step 5, judge whether to meet S05 stage of precision: the middle site of calculating every load, and judge single in each sheet load subregion in site with the site of this sheet load subregion apart from whether little of presetting numerical value, if judgment result is that "Yes", addressing finishes; Otherwise enter next step S06 stage;

Step 6, judge whether to reach S06 stage of greatest iteration step number: judge the current maximum iteration time that whether arrives setting, if judgment result is that "Yes", addressing finishes; Otherwise next step enters the S07 stage;

Step 7, reset S07 stage of initial solution: using resulting addressing result of S04 stage as new preliminary initial solution, and upgrade iterations, then reenter the S02 stage, proceed iterative computation.

At S01, in the stage, the method for described collection addressing data is as follows:

(1.1) for the region of can building a station: will consider the factors such as plot land used character, geographic position, traffic conditions, environmental factor, geologic condition to the division in plot and evaluation, be entered in each plot with the form of land price by career management personnel;

(1.2) to the region of can not building a station: such as road, bridge, lake etc., do not carry out Parcel division, be regarded as a high land price region and dodged.Because road in city planning is more, this processing mode also can be saved planning personnel's working time effectively;

(1.3) describing method of block message over the ground: ground block message is comprised of plot apex coordinate file and land price information two parts.The coordinate information and the plot type information that in the apex coordinate of plot, comprise each plot, arrange in order in each plot, and the apex coordinate in each plot is arranged by engineering actual graphical.

At S02, in the stage, the step of the initial solution that described given website distributes is as follows:

(2.1) preliminary given initial solution, what take capacity maximum treats that selective calling type is as reference, and existing substation capacity is made as to the max cap. after can increase-volume, according to a planning year load capacity, existing substation capacity, asks for and needs the number n of newly-built station; Ask site in the list of all loads; Take this point is the center of circle, and this point is that radius is justified to the bee-line on border, planning region, and initial website is distributed and is spacedly distributed on this circle;

(2.2) application transportation model, to load burst;

(2.3) every load is carried out to single meta addressing;

(2.4) iteration can converge on middle site, utilizes single meta site selection model, to having divided the load of sheet to carry out respectively single meta addressing in step (2.2), thereby obtains n new site.Initial solution using this n new site as next step.

At S04, in the stage, described calculating concrete grammar is:

(4.1) take out the optimum position of building a station, to the region of can not building a station, owing to it not being carried out to Parcel division, so the single meta site selection model after improving is only calculated ready-portioned plot;

(4.2), after application enhancements list meta method is calculated, whether each newly-built station, according to its concrete loading condition adjustment type of building a station, is detected to can the newly-built capacity less selective calling type for the treatment of; To existing transformer station, adopt same method to detect and whether need increase-volume;

(this section of not too smoothness that content is expressed, preferably arranges again.）

Described improvement list meta addressing is calculated to utilize and is improved single meta site selection model, on the basis of describing, considers land price factor in step 2 list meta site selection model, and has increased the border property constraint in plot, and its modelling is as follows:

$\left\{\begin{array}{c}\min C=\mathrm{\&gamma;}\&CenterDot;\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j{d}_j+S_i\\ d_j=\sqrt{{\left({x-x}_j\right)}^2+{\left({y-y}_j\right)}^2}\\ y=\mathrm{ax}+b\\ x_1<x<x_2\end{array}\right.$

Wherein Si is land price, and y=ax+b is brought into

then x is differentiated, making its derivative is 0, tries to achieve optimum solution, then by following formula $x=(\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j(x_j+{\mathrm{ay}}_j-\mathrm{ab})/d_j)/(\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j(1+a^2)/d_j)$ Further filter out optimum solution.

Claims (3)

1. transformer station's automatic addressing method of taking into account geographic factor, is characterized in that: it comprises the following step of carrying out in order:

The S01 stage of step 1, collection addressing data: gather the relevant geography information that relates to substation site selection, as addressing data;

The S02 stage of step 2, given initial solution: the initial solution that application transportation model and the given website of single meta site selection model distribute;

Step 3, choose S03 stage in every subregion correlation candidate plot: application level line principle, plot is screened, select and need the candidate plot investigated;

Step 4, to every S04 stage of improving single meta addressing: because ground block message is to describe by each apex coordinate in plot, so by each border property constraint and this plot land price information in relevant plot are all considered simultaneously, and calculate;

Step 5, judge whether to meet S05 stage of precision: the middle site of calculating every load, and judge single in each sheet load subregion in site with the site of this sheet load subregion apart from whether little of presetting numerical value, if judgment result is that "Yes", addressing finishes; Otherwise enter next step S06 stage;

Step 6, judge whether to reach S06 stage of greatest iteration step number: judge the current maximum iteration time that whether arrives setting, if judgment result is that "Yes", addressing finishes; Otherwise next step enters the S07 stage;

Step 7, reset S07 stage of initial solution: using resulting addressing result of S04 stage as new preliminary initial solution, and upgrade iterations, then reenter the S02 stage, proceed iterative computation.

2. transformer station's automatic addressing method of taking into account geographic factor according to claim 1, is characterized in that: at S02, in the stage, the step of the initial solution that described given website distributes is as follows:

(2.1) preliminary given initial solution, what take capacity maximum treats that selective calling type is as reference, and existing substation capacity is made as to the max cap. after can increase-volume, according to a planning year load capacity, existing substation capacity, asks for and needs the number n of newly-built station; Ask site in the list of all loads; Take this point is the center of circle, and this point is that radius is justified to the bee-line on border, planning region, and initial website is distributed and is spacedly distributed on this circle;

(2.2) application transportation model, to load burst;

(2.3) every load is carried out to single meta addressing;

(2.4) iteration can converge on middle site, utilizes single meta site selection model, to having divided the load of sheet to carry out respectively single meta addressing in step (2.2), thereby obtains n new site, the initial solution using this n new site as next step.

3. transformer station's automatic addressing method of taking into account geographic factor according to claim 1, is characterized in that: at S04, in the stage, described calculating concrete grammar is:

(4.1) take out the optimum position of building a station, to the region of can not building a station, owing to it not being carried out to Parcel division, so the single meta site selection model after improving is only calculated ready-portioned plot;

(4.2), after application enhancements list meta method is calculated, whether each newly-built station, according to its concrete loading condition adjustment type of building a station, is detected to can the newly-built capacity less selective calling type for the treatment of; To existing transformer station, adopt same method to detect and whether need increase-volume;

Described improvement list meta addressing is calculated to utilize and is improved single meta site selection model, on the basis of describing, considers land price factor in step 2 list meta site selection model, and has increased the border property constraint in plot, and its modelling is as follows:

$\left\{\begin{array}{c}\min C=\mathrm{\&gamma;}\&CenterDot;\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j{d}_j+S_i\\ d_j=\sqrt{{\left({x-x}_j\right)}^2+{\left({y-y}_j\right)}^2}\\ y=\mathrm{ax}+b\\ x_1<x<x_2\end{array}\right.$

S wherein _ifor land price, y=ax+b is brought into

then x is differentiated, making its derivative is 0, tries to achieve optimum solution, then by following formula $x=(\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j(x_j+{\mathrm{ay}}_j-\mathrm{ab})/d_j)/(\underset{j\&Element;J}{\mathrm{\&Sigma;}}{W}_j(1+a^2)/d_j)$ Further filter out optimum solution.

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