CN103116807A - Functional area power distribution network refined planning method - Google Patents

Abstract

Translated fromChinese

本发明涉及一种功能区配电网精细化规划方法，其主要技术特点是：包括以下步骤：步骤1：通过收集功能区电网网架、负荷以及发展需求的数据，确定高压变电站的容量、位置及供电范围；步骤2：进行功能区高压配电网络规划；步骤3：进行功能区中压配电网络精细化规划，具体包括步骤3.1：建立小规模高压变电站组的典型互联结构；步骤3.2：结合高压变电站布点和供电范围，构建功能区电网变电站互联结构；步骤3.3：构建功能区电网中压网架方案；步骤3.4：计算中压馈线联络情况，给出中压网架的布线。本发明设计合理，为功能区配电网精细化规划提供了科学依据，具有设计合理、可靠性高、节约建设成本且便于维护等特点。

The present invention relates to a refined planning method for a distribution network in a functional area. Its main technical features include the following steps: Step 1: Determine the capacity and location of the high-voltage substation by collecting data on the network frame, load, and development requirements of the functional area and power supply range; Step 2: Planning the high-voltage power distribution network in the functional area; Step 3: Carrying out the fine-grained planning of the medium-voltage power distribution network in the functional area, including Step 3.1: Establishing a typical interconnection structure of small-scale high-voltage substation groups; Step 3.2: Combining the distribution of high-voltage substations and the scope of power supply, construct the interconnection structure of substations in the functional area grid; Step 3.3: Construct the medium-voltage grid scheme of the functional area grid; Step 3.4: Calculate the connection of medium-voltage feeders and give the wiring of the medium-voltage grid. The invention has reasonable design, provides a scientific basis for the refined planning of the distribution network in the functional area, and has the characteristics of reasonable design, high reliability, saving construction cost and convenient maintenance.

Description

A kind of functional areas power distribution network planing method that becomes more meticulous

Technical field

The invention belongs to the distribution network technical field, especially a kind of functional areas power distribution network planing method that becomes more meticulous.

Background technology

Urban distribution network refers to provide and distribute for it general name of electric power networks in city scope.Urban distribution network is the important component part of electric system, is again the load center of electric system, has that power consumption is large, load density is high, safe and reliable and power supply quality requirement high.One of important infrastructure that urban distribution network or urban modernization are built, it is built, transforms and economy and the security of operation had both affected the economic benefit of whole power department and the power supply quality of vast power consumer, has influence on again the normal performance of city allomeric function.According to electric pressure and the difference that plays a role in power supply process thereof, urban distribution network can be divided into power transmission network (220kV and more than), high voltage distribution network (110kV and 35kV), medium voltage distribution network (20kV and 10kV) and low-voltage network (380/220V) etc. usually, is included as simultaneously transformation facility and power generating equipment that they provide power supply.

Hence one can see that, and urban power distribution network is the main body of urban distribution network.Electrical network is the important step of electric energy transmitting in electric system, is the important leverage of effectively utilizing electric energy.Power distribution network is last ring that the user is arrived in electric system, and it and user's relation is the tightst, and is also direct on the impact of customer power supply reliability and power supply quality.In some Main Developed Countries, the proportion of electric grid investment in the electric power gross investment is generally all higher than 50%, and the power distribution network investment is not less than the power transmission network investment.And in China, due to for a long time formed " retransmit, light for, don't work " situation, distribution network construction is in the state of under-capitalization always.The ratio between investments of China's generating before late 1990s, transmission of electricity, distribution is approximately 1:0.21:0.12.Therefore, caused China's generating, transmission of electricity, distribution development to be coordinated not, power plant has electricity can not send, the user need again less than, and the loss of electrical network is high, voltage is low, the power supply unreliable, resist the ability of mishap and disaster a little less than, therefore, electrical network especially the structure of power distribution network weakness become electric system for the bottleneck of electricity consumption.

In recent years, along with deeply carrying out of Electric Power Network Planning work, the power distribution network facility is progressively sound, and distribution net work structure is tending towards rationally, and there has been considerable leap the aspects such as the power supply reliability of power distribution network, the quality of power supply, power supply economics.And along with the development of society, city planning is tending towards compartmentalization, and city function significantly promotes, and town and country looks development essence changes, and the international modernization general layout that shows unique characteristics basically forms.The center of gravity of city planning shifts to the city function section planning gradually, and urban power distribution network planning also requires to shift to the functional areas Electric Power Network Planning.Electrical network common scale in functional areas is less, the electric pressure that relates to and planning center of gravity mainly concentrate in the design of middle pressure network frame, and the planning that becomes more meticulous that how limited for area, distinct characteristics, the fritter urban power distribution network that possesses certain directive property function carry out middle-voltage network is problem in the urgent need to address at present.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, functional areas power distribution network that reliability is high planing method that becomes more meticulous is provided.

The present invention solves its technical matters and takes following technical scheme to realize:

Power distribution network planing method that becomes more meticulous in a kind of functional areas comprises the following steps:

Step 1: by the data of collecting function district Net Frame of Electric Network, load and growth requirement, determine capacity, position and the service area of high voltage substation;

Step 2: carry out functional areas high-voltage distribution network planning;

Step 3: carry out the planning that becomes more meticulous of functional areas MV distribution systems, specifically comprise the following steps:

Step 3.1: set up the typical interconnect architecture of high voltage substation group on a small scale;

Step 3.2: layout and service area in conjunction with high voltage substation, constructing function district electricity grid substation interconnect architecture;

Step 3.3: pressure network frame scheme in constructing function district electrical network;

Step 3.4: press feeder line contact situation in calculating, provide the wiring of middle pressure network frame.

And the method that describedstep 2 is carried out the planning of functional areas high-voltage distribution networks is: the Connection Mode of employing and main wiring mode, set up the power supply of distribution substation in simple functional areas high pressure rack, planning function district.

And the method for described step 3.2 constructing function district electricity grid substation interconnect architecture is:

Step 3.2.1: transformer station in functional areas is set up interconnected in twos structure, successively every transformer station is become all the other transformer stations of traversal and sets up interconnecting relation;

Step 3.2.2: according to the unreasonable interconnecting relation of deletion principle, formation consists of blank contact interconnect architecture by reasonable interconnecting relation;

Step 3.2.3: according to the typical interconnect architecture of small-scale high voltage substation group, transformer station's blank contact interconnect architecture in functional areas is configured to and its most close typical structure a small amount of interconnecting relation by increasing or deleting.

And described deletion principle is:

Delete principle 1: transformer station's interconnecting relation of natural or artificial geographical barrier is crossed in deletion;

Delete principle 2: deletion surpasses critical distance transformer station interconnecting relation;

Delete principle 3: the interconnected transformer station sum that guarantees final arbitrary transformer station is no more than 4, if the interconnected transformer station number of certain transformer station exceeds, and the interconnecting relation that exceeds according to the deletion in turn from big to small of contact distance.

And in described step 3.3 constructing function district electrical network, the method for pressure network frame comprises the following steps:

Step 3.3.1: extract main transformer communication relationship matrix:

N seat transformer station is arranged in functional areas, to i seat station j main transformer renumber into, and will be labeled as the Ni ∑, get N ∑=N1+N2+ ... + Nn, the total number of units of main transformer in presentation function district;

Provide main transformer communication relationship matrix L_Link:

$L_{\mathrm{link}}=\left[\begin{array}{ccccc}{\mathrm{<figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}"><figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">L</figure-callout></figure-callout>}}_{\mathrm{1,1}}& ...& {\mathrm{<figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">L</figure-callout>}}_{1,i}& ...& {\mathrm{<figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">L</figure-callout>}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ L_{i,1}& ...& L_{i,i}& ...& L_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ L_{N_{\mathrm{\&Sigma;}},1}& ...& L_{N_{\mathrm{\&Sigma;}},i}& ...& L_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

L wherein_i,jRepresent i platform main transformer and j platform main transformer communication relationship (i=1,2,3 ...,, j=1,2,3 ...), get L when communication relationship is arranged_i,j=1, otherwise L_i,j=0.And there is communication relationship between supposition main transformer and self, i.e. L_i,i=1;

Step 3.3.2: analyze and get in touch with the unit power supply capacity:

In main transformer communication relationship matrix, by determining to have with i platform main transformer the main transformer maximum load situation of communication relationship in the capable vector of i, the contact unit maximum load rate matrix that represents of matrix definable following formula according to this:

$T=\left[\begin{array}{ccccc}{\mathrm{<figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}"><figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">T</figure-callout></figure-callout>}}_{\mathrm{1,1}}& ...& {\mathrm{<figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">T</figure-callout>}}_{1,i}& ...& {\mathrm{<figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">T</figure-callout>}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ T_{i,1}& ...& T_{i,i}& ...& T_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ T_{N_{\mathrm{\&Sigma;}},1}& ...& T_{N_{\mathrm{\&Sigma;}},i}& ...& T_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

In formula:

$T_{i,j}=L_{i,j}-(1-\frac{\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{L}_{i,j}{R}_j-R_i}{\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{L}_{i,j}{R}_j})$

Step 3.3.3: calculate main transformer contact capacity requirement;

When definition main transformer load transition matrix represents main transformer " N-1 " verification, the load of interconnected main transformer turns the band situation, and main transformer load transition matrix is as shown in the formula definition:

$\mathrm{Tr}=\left[\begin{array}{ccccc}{\mathrm{<figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}"><figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">Tr</figure-callout></figure-callout>}}_{\mathrm{1,1}}& ...& {\mathrm{<figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">Tr</figure-callout>}}_{1,i}& ...& {\mathrm{<figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">Tr</figure-callout>}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ {\mathrm{Tr}}_{i,1}& ...& {\mathrm{Tr}}_{i,i}& ...& {\mathrm{Tr}}_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},1}& ...& {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},i}& ...& {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

In formula:

Tr_i,j=R_j(1-T_i,j)

Definition s_{I, j}It is the contact capacity requirement between i platform main transformer and j platform main transformer;

s_i，j＝s_j，i=max(Tr_j，i，Tr_i,j)

Step 3.3.4: calculate between interconnected transformer station the demand contact and count;

Determine the Connection Mode of medium-voltage line, according to the line load rate requirement of different Connection Modes, calculate every circuit turn for the time available nargin, be shown below:

m=R_l(1-t_l)

In formula:

M---circuit turns the available nargin when supplying;

R_l---the capacity of single line;

t_l---the permission running load rate of single line, this numerical value is relevant with the Connection Mode that circuit adopts.

According to contact capacity requirement and circuit between transformer station turn for the time available nargin calculate connectivity number between the station that should set up between main transformer, computing method as shown in the formula:

$c_{i,j}=[\frac{{\mathrm{Tr}}_{i,j}}{m}+1]$

$c_{\mathrm{inter}}^{\left(z\right)}=\underset{i=N_z+1}{\overset{N_{z+1}}{\mathrm{\&Sigma;}}}\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{c}_{i,j}$

In formula:

c_{I, j}---the contact that needs between main transformer i and main transformer j is counted;

c_Inter^(z)---connectivity number between the z of transformer station total station.

Investigate the total outlet number of transformer station, remove connectivity number between the station, remaining circuit is set up contact in the station, and in standing, connectivity number utilizes following formula to calculate:

$c_{\mathrm{inner}}^{\left(z\right)}=\frac{N_l-c_{\mathrm{iner}}^{\left(z\right)}}{2}$

In formula:

c_Inner^(z)---contact in the z of transformer station total station;

N_l---the total outlet number of number transformer station.

Advantage of the present invention and good effect are:

The present invention is reasonable in design, it is after carrying out the analysis of addressing constant volume to high voltage substation, characteristics simple according to the functional areas electric network composition, utilizing the typical model theory to carry out the High-Voltage Network framework builds with the high voltage substation interconnect architecture and builds, typical model still all has more excellent character from the economy of equipment utilization from the security of operation of power networks, makes functional areas electrical network overall architecture be structured on higher basis; Pressure network frame contact scheme in proposing before middle pressure network frame wiring, middle pressure network frame contact scheme fully takes into account the performance of functional areas mains supply ability, for the power distribution network planning that becomes more meticulous in functional areas provides scientific basis, have reasonable in design, reliability is high, save construction cost and be convenient to the characteristics such as maintenance.

Description of drawings

Fig. 1 is process flow diagram of the present invention;

Fig. 2 is the typical interconnect architecture schematic diagram of small-scale high voltage substation group;

Fig. 3 is the structure process flow diagram of functional areas electricity grid substation interconnect architecture;

Fig. 4 is the main transformer contact structural representation of interconnected transformer station;

Fig. 5 is the addressing result schematic diagram of certain functional areas electricity grid substation;

Fig. 6 is the planning schematic diagram of certain functional areas high pressure rack;

Fig. 7 is the interconnect architecture schematic diagram of certain functional areas high voltage substation;

Fig. 8 is the planning schematic diagram of pressure network frame in certain functional areas.

Embodiment

Below in conjunction with accompanying drawing, the present invention is further described.

Power distribution network planing method that becomes more meticulous in a kind of functional areas as shown in Figure 1, comprises the following steps:

Step 1: by the data of collecting function district Net Frame of Electric Network, load and growth requirement, determine capacity, position and the service area of high voltage substation, the power distribution network planning that becomes more meticulous in functional areas puts before this and carries out;

Step 2: carry out functional areas high-voltage distribution network planning;

According to the requirement of reliability, Connection Mode and the main wiring mode of employing, set up simple functional areas high pressure rack, the power supply of the distribution substation in the planning function district is established in functional areas pressure network frame in transformer station the become more meticulous basis of planning;

Step 3: carry out the planning that becomes more meticulous of functional areas MV distribution systems:

Because functional areas electrical network scale is less, can be relatively simple for structure in the planning that becomes more meticulous of pressure network frame, with the security of guarantee operation of power networks and the economy of equipment utilization.The MV distribution systems planning step that becomes more meticulous is as follows:

Step 3.1: set up the typical interconnect architecture of high voltage substation group on a small scale, as the reference of high voltage substation interconnect scheme;

In this step, the typical interconnect architecture of small-scale high voltage substation group as shown in Figure 2.The small distribution network of functional areas can be applied mechanically typical interconnect architecture construction, and typical interconnect architecture still all has more excellent character from the economy of equipment utilization through proving from the security of operation of power networks.

Step 3.2: layout and service area in conjunction with high voltage substation, constructing function district electricity grid substation interconnect architecture, as shown in Figure 3, the method for constructing function district electricity grid substation interconnect architecture is:

Step 3.2.1: the complete interconnect scheme that builds transformer station in functional areas, namely transformer station in functional areas is set up interconnected in twos structure, successively every transformer station is become all the other transformer stations of traversal and sets up interconnecting relation, if n seat transformer station altogether in functional areas, should form Cn2 interconnecting relation after this step, such interconnect architecture is called get in touch with interconnect architecture fully;

Step 3.2.2: on the basis of getting in touch with interconnect architecture fully, according to the unreasonable interconnecting relation of some criterion deletion, the interconnect architecture that formation is made of reasonable interconnecting relation, such model is called blank contact interconnect architecture, deletes that the principle of interconnecting relation mainly limits, turns around geographic factor the restriction structure that supplies distance limit, reaches transformer station's degree;

In this step, delete that transformer station's interconnecting relation is the main part that functional areas electricity grid substation interconnect architecture builds.Delete that interconnecting relation carries out successively according to following principle:

Delete principle 1: unless special requirement is arranged, transformer station's interconnecting relation of natural or artificial geographical barrier is crossed in deletion.Geographical barrier mainly contains rivers, massif, some special scenic spot etc., and the problem such as crosses over that similar barrier may cause difficulty of construction greatly or engineering cost is higher should be avoided as far as possible.

Delete principle 2: unless special requirement is arranged, deletion surpasses critical distance transformer station interconnecting relation, the critical distance value is chosen as follows, if draft interconnected use overhead transmission line or overground cable hybrid power supply, interconnected critical distance is 4.03km; If draft the pure cable line of interconnected use, interconnected critical distance is 9.16km, critical distance take fault turn for the time feeder line terminal voltage qualified as according to and take into account certain buckling factor and calculate and get.

Delete principle 3: the interconnected transformer station sum that guarantees final arbitrary transformer station is no more than 4, in order to guarantee that the blank structure has the leeway of adjustment when typical structure is drawn close in step (3.2.3), here interconnected transformer station number preferably is controlled at below 3, if the interconnected transformer station number of certain transformer station exceeds, the interconnecting relation that exceeds according to the deletion in turn from big to small of contact distance.Can prove after interconnected transformer station number surpasses 4, the number of interconnection continues to promote the number of interconnection facilitation of power distribution network performance is weakened rapidly.

By above-mentioned steps, construct functional areas electricity grid substation interconnect architecture.

Step 3.2.3: on blank contact interconnect architecture basis, typical interconnect architecture according to small-scale high voltage substation group, by increasing or deleting a small amount of interconnecting relation, transformer station's blank contact interconnect architecture in functional areas is configured to and its most close typical structure, why want the blank construction for electricity to draw close to typical structure, because no matter find security, plant factor angle from power supply through computational analysis, or from economy, simple operation angle, typical structure all can reach the level of optimizing.

Step 3.3: giving full play to functional areas power distribution network power supply capacity as target, pressure network frame scheme in constructing function district electrical network, in constructing function district electrical network, the concrete grammar of pressure network frame is:

In order to bring into play the simple characteristic of functional areas dispatching of power netwoks, exist in step (3.2) and all adopt following connection form between the transformer station of interconnecting relation: any main transformer of transformer station is only got in touch with mutually with a wherein main transformer at offside station.Connection form such as Fig. 4.And specifically need how many bar feeder lines to get in touch with mutually between two main transformers, by following calculative determination:

Step 3.3.1: extract main transformer communication relationship matrix:

N seat transformer station is arranged in functional areas, to i seat station j main transformer renumber into, and will be labeled as the Ni ∑, get N ∑=N1+N2+ ... + Nn, the total number of units of main transformer in presentation function district;

Provide main transformer communication relationship matrix L_Link:

$L_{\mathrm{link}}=\left[\begin{array}{ccccc}{\mathrm{<figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}"><figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">L</figure-callout></figure-callout>}}_{\mathrm{1,1}}& ...& {\mathrm{<figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">L</figure-callout>}}_{1,i}& ...& {\mathrm{<figure-callout\; label="L"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">L</figure-callout>}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ L_{i,1}& ...& L_{i,i}& ...& L_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ L_{N_{\mathrm{\&Sigma;}},1}& ...& L_{N_{\mathrm{\&Sigma;}},i}& ...& L_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

L wherein_{I, j}Represent i platform main transformer and j platform main transformer communication relationship (i=1,2,3 ...,, j=1,2,3 ...), get L when communication relationship is arranged_i,j=1, otherwise L_i,j=0.And there is communication relationship between supposition main transformer and self, i.e. L_{I, i}=1;

Step 3.3.2: analyze and get in touch with the unit power supply capacity:

In main transformer communication relationship matrix, by determining to have with i platform main transformer the main transformer maximum load situation of communication relationship in the capable vector of i, the contact unit maximum load rate matrix that represents of matrix definable following formula according to this:

$T=\left[\begin{array}{ccccc}{\mathrm{<figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}"><figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">T</figure-callout></figure-callout>}}_{\mathrm{1,1}}& ...& {\mathrm{<figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">T</figure-callout>}}_{1,i}& ...& {\mathrm{<figure-callout\; label="T"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">T</figure-callout>}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ T_{i,1}& ...& T_{i,i}& ...& T_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ T_{N_{\mathrm{\&Sigma;}},1}& ...& T_{N_{\mathrm{\&Sigma;}},i}& ...& T_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

In formula:

$T_{i,j}=L_{i,j}-(1-\frac{\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{L}_{i,j}{R}_j-R_i}{\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{L}_{i,j}{R}_j})$

Step 3.3.3: calculate main transformer contact capacity requirement;

When definition main transformer load transition matrix represents main transformer " N-1 " verification, the load of interconnected main transformer turns the band situation, and main transformer load transition matrix is as shown in the formula definition:

$\mathrm{Tr}=\left[\begin{array}{ccccc}{\mathrm{<figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}"><figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">Tr</figure-callout></figure-callout>}}_{\mathrm{1,1}}& ...& {\mathrm{<figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">Tr</figure-callout>}}_{1,i}& ...& {\mathrm{<figure-callout\; label="Tr"\; filenames="HDA00002568483400041.png,HDA00002568483400042.png"\; state="\{\{state\}\}">Tr</figure-callout>}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ {\mathrm{Tr}}_{i,1}& ...& {\mathrm{Tr}}_{i,i}& ...& {\mathrm{Tr}}_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},1}& ...& {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},i}& ...& {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

In formula:

Tr_i,j=R_j(1-T_i,j)

Definition s_{I, j}It is the contact capacity requirement between i platform main transformer and j platform main transformer;

s_i，j＝s_j，i=max(Tr_j，i，Tr_i,j)

Step 3.3.4: calculate between interconnected transformer station the demand contact and count;

Determine the Connection Mode of medium-voltage line, according to the line load rate requirement of different Connection Modes, calculate every circuit turn for the time available nargin, be shown below:

m=R_l(1-t_l)

In formula:

M---circuit turns the available nargin when supplying;

R_l---the capacity of single line;

t_l---the permission running load rate of single line, this numerical value is relevant with the Connection Mode that circuit adopts.

According to contact capacity requirement and circuit between transformer station turn for the time available nargin calculate connectivity number between the station that should set up between main transformer, computing method as shown in the formula:

$c_{i,j}=[\frac{{\mathrm{Tr}}_{i,j}}{m}+1]$

$c_{\mathrm{inter}}^{\left(z\right)}=\underset{i=N_z+1}{\overset{N_{z+1}}{\mathrm{\&Sigma;}}}\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{c}_{i,j}$

In formula:

c_{I, j}---the contact that needs between main transformer i and main transformer j is counted;

c_Inter^(z)---connectivity number between the z of transformer station total station.

Investigate the total outlet number of transformer station, remove connectivity number between the station, remaining circuit is set up contact in the station, and in standing, connectivity number utilizes following formula to calculate:

$c_{\mathrm{inner}}^{\left(z\right)}=\frac{N_l-c_{\mathrm{iner}}^{\left(z\right)}}{2}$

In formula:

c_Inner^(z)---contact in the z of transformer station total station;

N_l---the total outlet number of number transformer station.

Step 3.4: press feeder line contact situation in calculating, provide the wiring of middle pressure network frame

Press the middle pressure feeder line contact situation that calculates in feeder line situation and above-mentioned steps 3.3 in this step basis, provide the wiring of middle pressure network frame.

The below plans its following electrical network according to the method that the present invention proposes take a certain " industry park " functional areas electrical network as example.

(1) load prediction and Substation Optimization

Adopt traditional load and Substation Optimization method, the result of load prediction and Substation Optimization as shown in Figure 5.

(2) high pressure rack planning

Functional areas electrical network scale is less, is 2 110kV transformer station power supplies in functional areas by 1 220kV transformer station outside functional areas as the high-voltage power supply of functional areas.According to the substation location structure, contrast typical wiring mode construction simple functional areas high pressure rack is established functional areas electrical network the become more meticulous basis of planning, intends adopting the double T wiring construction, and high pressure rack program results as shown in Figure 6.

(3) pressure network frame planning in

This step and traditional distribution network planning are different, and the capacity-load ratio that traditional distribution network planning utilization is estimated limits transformer station's load supply, and rough estimating makes equipment sparing too much, affects the economy that distribution network construction moves; And the present invention reduces the reservation of equipment sparing by the ability of more accurately grasping the medium-voltage line transfer load, improves functional areas power grid construction economy.At first planning determine the whole interconnect scheme of transformer station in functional areas by contrasting typical transformer station interconnect architecture; And then shift the demand of capacity between accurate Calculation interconnected transformer station; Press the contact scheme during the circuit model that last basis is selected and medium-voltage line connection type calculate, press the wiring diagram of feeder line in formation.

(3.1) high voltage substation interconnect architecture

At first will be for better simply substation location in functional areas, contrast some and build the interconnected whole strategy of substation low-voltage side through what prove than Optimizing Mode, only has two, 110kV transformer station in functional areas, at first form interconnected transformer station's interconnect architecture fully, interconnected transformer station spacing satisfies the requirement of deletingprinciple 1 and 2 in step (3.2), and the number of interconnection of every transformer station is 1.Contrast typical interconnect architecture, with Fig. 2 in the typical interconnect architecture of 2 transformer stations match, can be used as the interconnected ordering plan of substation low-voltage side, as shown in Figure 7.

(3.2) press the contact capacity requirement to calculate in

On transformer station's interconnect architecture basis, functional areas of determining in last step, the main transformer low-pressure side adopts contact scheme shown in Figure 3, according to the contact capacity requirement between the formula calculating main transformer of step (3.3.1) to (3.3.3), result of calculation such as table 1 and table 2.

Table 1 110kV transformer station table

Press contact capacity requirement table in table 2

(3.3) press in and get in touch with the calculating of counting

According to the contact capacity requirement in table 2, can calculate contact in how many strip adoptions of substation low-voltage side outlet stations, contact (for guaranteeing the power distribution network Operation safety, not advising adopting the radial line power supply) between how many strip adoptions stations.The 10kV medium-voltage line adopts YJV22-3 * 300, and current carrying capacity of conductor is 552A, and circuit capacity is 9.56MVA, and the unified simply connected network mode of connection that adopts of medium-voltage line is according to the formula in step (3.3.4), result of calculation such as table 3.

Pressure network frame Policy Table in table 3

(3.4) press the feeder line wiring in

According to above computational analysis, provide middle compress line situation, as shown in Figure 8.

Permission load factor such as following table 4 that the grid structure main transformer that builds according to the present invention moves.

The table 4 main transformer running load rate table of comparisons

Can find out, because the functional areas electric network composition is simple, a small amount of transformer station is easy to build with reference to typical module the one-piece construction of high pressure rack and middle pressure network frame, is easy to simultaneously the calculating that becomes more meticulous of centering pressure network frame.The present invention determines height, middle pressure network shelf structure by medelling and becomes more meticulous to press the contact scheme in calculating, and makes the contact of middle pressure network frame build reasonable, in the economy that guarantees to improve on the security basis of operation of power networks the power grid construction O﹠M.

It is emphasized that; embodiment of the present invention is illustrative; rather than determinate; therefore the present invention includes and be not limited to the embodiment described in embodiment; every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope of protection of the invention equally.

Claims (5)

1. functional areas power distribution network planing method that becomes more meticulous is characterized in that: comprise the following steps:

Step 1: by the data of collecting function district Net Frame of Electric Network, load and growth requirement, determine capacity, position and the service area of high voltage substation;

Step 2: carry out functional areas high-voltage distribution network planning;

Step 3: carry out the planning that becomes more meticulous of functional areas MV distribution systems, specifically comprise the following steps:

Step 3.1: set up the typical interconnect architecture of high voltage substation group on a small scale;

Step 3.2: layout and service area in conjunction with high voltage substation, constructing function district electricity grid substation interconnect architecture;

Step 3.3: pressure network frame scheme in constructing function district electrical network;

Step 3.4: press feeder line contact situation in calculating, provide the wiring of middle pressure network frame.

2. a kind of functional areas according to claim 1 power distribution network planing method that becomes more meticulous, it is characterized in that: the method that described step 2 is carried out the planning of functional areas high-voltage distribution networks is: the Connection Mode of employing and main wiring mode, set up the power supply of distribution substation in simple functional areas high pressure rack, planning function district.

3. a kind of functional areas according to claim 1 power distribution network planing method that becomes more meticulous is characterized in that: the method for described step 3.2 constructing function district electricity grid substation interconnect architecture is:

Step 3.2.1: transformer station in functional areas is set up interconnected in twos structure, successively every transformer station is become all the other transformer stations of traversal and sets up interconnecting relation;

Step 3.2.2: according to the unreasonable interconnecting relation of deletion principle, formation consists of blank contact interconnect architecture by reasonable interconnecting relation;

Step 3.2.3: according to the typical interconnect architecture of small-scale high voltage substation group, transformer station's blank contact interconnect architecture in functional areas is configured to and its most close typical structure a small amount of interconnecting relation by increasing or deleting.

4. a kind of functional areas according to claim 3 power distribution network planing method that becomes more meticulous, it is characterized in that: described deletion principle is:

Delete principle 1: transformer station's interconnecting relation of natural or artificial geographical barrier is crossed in deletion;

Delete principle 2: deletion surpasses critical distance transformer station interconnecting relation;

Delete principle 3: the interconnected transformer station sum that guarantees final arbitrary transformer station is no more than 4, if the interconnected transformer station number of certain transformer station exceeds, and the interconnecting relation that exceeds according to the deletion in turn from big to small of contact distance.

5. a kind of functional areas according to claim 1 power distribution network planing method that becomes more meticulous is characterized in that: in described step 3.3 constructing function district electrical network, the method for pressure network frame comprises the following steps:

Step 3.3.1: extract main transformer communication relationship matrix:

N seat transformer station is arranged in functional areas, to i seat station j main transformer renumber into, and will be labeled as the Ni ∑, get N ∑=N1+N2+ ... + Nn, the total number of units of main transformer in presentation function district;

Provide main transformer communication relationship matrix L_Link:

$L_{\mathrm{link}}=\left[\begin{array}{ccccc}{L}_{\mathrm{1,1}}& ...& L_{1,i}& ...& L_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ L_{i,1}& ...& L_{i,i}& ...& L_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ L_{N_{\mathrm{\&Sigma;}},1}& ...& L_{N_{\mathrm{\&Sigma;}},i}& ...& L_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

L wherein_i,jRepresent i platform main transformer and j platform main transformer communication relationship (i=1,2,3 ...,, j=1,2,3 ...), get L when communication relationship is arranged_i,j=1, otherwise L_{I, j}=0.And there is communication relationship between supposition main transformer and self, i.e. L_{I, i}=1;

Step 3.3.2: analyze and get in touch with the unit power supply capacity:

In main transformer communication relationship matrix, by determining to have with i platform main transformer the main transformer maximum load situation of communication relationship in the capable vector of i, the contact unit maximum load rate matrix that represents of matrix definable following formula according to this:

$T=\left[\begin{array}{ccccc}{T}_{\mathrm{1,1}}& ...& T_{1,i}& ...& T_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ T_{i,1}& ...& T_{i,i}& ...& T_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ T_{N_{\mathrm{\&Sigma;}},1}& ...& T_{N_{\mathrm{\&Sigma;}},i}& ...& T_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

In formula:

$T_{i,j}=L_{i,j}-(1-\frac{\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{L}_{i,j}{R}_j-R_i}{\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{L}_{i,j}{R}_j})$

Step 3.3.3: calculate main transformer contact capacity requirement;

When definition main transformer load transition matrix represents main transformer " N-1 " verification, the load of interconnected main transformer turns the band situation, and main transformer load transition matrix is as shown in the formula definition:

$\mathrm{Tr}=\left[\begin{array}{ccccc}{\mathrm{Tr}}_{\mathrm{1,1}}& ...& {\mathrm{Tr}}_{1,i}& ...& {\mathrm{Tr}}_{1,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ {\mathrm{Tr}}_{i,1}& ...& {\mathrm{Tr}}_{i,i}& ...& {\mathrm{Tr}}_{i,N_{\mathrm{\&Sigma;}}}\\ .& & .& & .\\ .& ...& .& ...& .\\ .& & .& & .\\ {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},1}& ...& {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},i}& ...& {\mathrm{Tr}}_{N_{\mathrm{\&Sigma;}},N_{\mathrm{\&Sigma;}}}\end{array}\right]$

In formula:

Tr_i,j=R_j(1-T_i,j)

Definition s_{I, j}It is the contact capacity requirement between i platform main transformer and j platform main transformer;

s_i，j＝s_j，i=max(Tr_j，i，Tr_i,j)

Step 3.3.4: calculate between interconnected transformer station the demand contact and count;

Determine the Connection Mode of medium-voltage line, according to the line load rate requirement of different Connection Modes, calculate every circuit turn for the time available nargin, be shown below:

m=R_l(1-t_l)

In formula:

M---circuit turns the available nargin when supplying;

R_l---the capacity of single line;

t_l---the permission running load rate of single line, this numerical value is relevant with the Connection Mode that circuit adopts.

According to contact capacity requirement and circuit between transformer station turn for the time available nargin calculate connectivity number between the station that should set up between main transformer, computing method as shown in the formula:

$c_{i,j}=[\frac{{\mathrm{Tr}}_{i,j}}{m}+1]$

$c_{\mathrm{inter}}^{\left(z\right)}=\underset{i=N_z+1}{\overset{N_{z+1}}{\mathrm{\&Sigma;}}}\underset{j=1}{\overset{N_{\mathrm{\&Sigma;}}}{\mathrm{\&Sigma;}}}{c}_{i,j}$

In formula:

c_{I, j}---the contact that needs between main transformer i and main transformer j is counted;

c_Inter^(z)---connectivity number between the z of transformer station total station.

Investigate the total outlet number of transformer station, remove connectivity number between the station, remaining circuit is set up contact in the station, and in standing, connectivity number utilizes following formula to calculate:

$c_{\mathrm{inner}}^{\left(z\right)}=\frac{N_l-c_{\mathrm{iner}}^{\left(z\right)}}{2}$

In formula:

c_Inner^(z)---contact in the z of transformer station total station;

N_l---the total outlet number of number transformer station.

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