CN103605838B - A kind of power distribution network uniform wiring map generalization method being applicable to Study on Trend - Google Patents

Abstract

The present invention relates to a kind of power distribution network uniform wiring map generalization method being applicable to Study on Trend.First the present invention obtains the raw information of position and the circuit comprising transformer station and load；Transformer station and load are seen as node, and node coupled to each node traverses again, make gravitation and make a concerted effort to calculate；Evade further according to a limit and Bian Bian and obtain repulsion vector；The equation of motion of pull strength is substituted into mobile node after obtaining with joint efforts；Iteration terminates the node motion in this topology to the final mean annual increment movement amount of node less than after definite value；Finally derive node final position, write SVG, complete this power distribution network uniform wiring map generalization.The present invention can meet the system requirement to SVG syntax format；Become figure efficiency high；Carrying out after voltage equal pitch contour renders to it, the rendering effect of figure is well arranged, it is possible to be greatly promoted power distribution network operations staff to electrical network situation control.

Description

A kind of power distribution network uniform wiring map generalization method being applicable to Study on Trend

Technical field

The invention belongs to intelligent grid Situation Awareness and visualization field, it is adaptable to power distribution network is carried out situation The time power distribution network uniform wiring map generalization method used analyzed, is specifically related to one and is applicable to situation and divides The power distribution network uniform wiring map generalization method of analysis.

Background technology

Medium voltage distribution network (hereinafter referred to as distribution) is directly to determine customer power supply quality and power supply reliability One of electrical network.Transformer station 10 kV outgoing line measures and probably already exists in supervisory control of substation；Along with public affairs become eventually End, special transformer terminals all standing, the stable state of medium voltage distribution network tip electrically measures the most complete；Press in Tong Shi Switching station in network, ring main unit, a distant place for cable branch box gather and also gradually build up, additionally aerial line Branch also begins to install the indicating fault instrument of band teletransmission, therefore medium voltage distribution network static state and the situation of fault case Perception has the most progressively possessed condition with situation visualization.

After data acquisition completes, the trend of the power distribution network of discontinuity surface when utilizing these metric data to carry out each Calculate, all nodes of network and the electric parameters of line segment can be obtained, instant situation picture can be made, and Carry out the visualization of online real-time situation to represent.These instant situation pictures carry out target picture storage during band, Or utilize historical metrology data and Load flow calculation manufacturing history situation picture, given in the period by history The synthesis of situation picture, can carry out situation visualization and play or history situation inverting, go through with understanding and parsing The reason that history situation is formed；For giving the period (such as 1 day) future, as known scheduled outage etc. with join The anticipated operation that network operation mode is relevant, and the load carrying out given interval (such as 15 minutes) is pre- Survey, then can carry out Load flow calculation, and make following day part predictive situation picture, then they are synthesized, Then can carry out further trend figure broadcasting, to predict the development of further trend.

The common wiring diagram of distribution has feeder line line chart, system line chart, distribution geographical wiring diagram etc., makes It is not quite similar by scene.Feeder line figure can only describe single line, and system line chart, distribution geography wiring Figure then can describe whole distribution network.For improving operational flexibility and the reliability of medium voltage distribution network, main The 10kV outlet of source substation is increasingly employed the designs such as the many contacts of many segmentations, annular, pure spoke Penetrating shape design proportion day by day to reduce, therefore power distribution network not only wire structures becomes increasingly complex, and its system diagram is certainly Dynamic generation is the most difficult.But urban distribution network system line chart, is mainly used in distribution method of operation analysis, It is thus desirable to fairly large distribution figure is shown at same plane, at least those have trend at feeder line layer Mutual static network must be shown at same plane.

Even if the design of distribution is closed loop, distribution operation remains open loop and is radial, i.e. often Individual steady-state run time section, certain load or certain node or certain circuit, all can only be by a power transformation Certain outlet stood is powered (not considering the isolated power grid with DG), and this explanation transformer station remains main electricity Source, therefore centered by transformer station, the feeder line of its all power supplies and load situation sense at grade Know and situation visualization, it can be observed that the static or transformer station of fault case, feeder line, load mutual Dynamic relation, is a kind of preferably situation visual means.At this moment, situation base map is no longer its Static Design The wiring diagram of state, but (will be situated between in a separate paper by Rapid radiating shape topology identification based on the distribution position of the switch Continue), eventually form the Dynamic radiation distribution net work structure that single transformer station is power supply, therefore study with power transformation Power distribution network Situation Awareness centered by standing still is of universal significance with situation visualization.

Reasonably power distribution network uniform wiring diagram should meet node be uniformly distributed, configuration rationally and cross point The fewest feature.Current main research has 1) discuss the demand of urban distribution network system diagram and answer Miscellaneous degree, but provide only some thinkings automatically generated, the most do not provide detailed algorithm；2) propose to draw The method entering mechanical model, is regarded node as the particle having gravitation and repulsion, is reached by stress balance Being uniformly distributed of node；3) comprehensive divide-and-conquer strategy and annular layout method.3) table is carried out with the tree in graph theory Show a radial distribution network topological structure, and give generation radial distribution feeder electrical wiring The method of figure.

In power transmission network field, uniform wiring diagram is applied, currently mainly uses with the longest mould Intend annealing algorithm, lead placement algorithm with becoming figure efficiency height and the uniformity preferable modified model power.

In field of distribution network, the most still use geographical wiring diagram as the analysis of its situation.Distribution entoilage Reason wiring diagram is with geography information as base map or reference background reflects the visualization figure that Distribution Network Load Data is truly distributed Shape, but often there is load intensive, the showing of crossing elimination in geographical wiring diagram based on true geographical coordinate As.Therefore, use for reference the concept of the uniform figure of power transmission network, if the feature for power distribution network topology is suitable for In the autoplacement method of power distribution network uniform wiring diagram, meaning will be the most great.

Summary of the invention

Present invention is primarily targeted at for the deficiencies in the prior art, propose one and be applicable to Study on Trend Power distribution network uniform wiring map generalization method.

The inventive method comprises the following steps:

A kind of power distribution network uniform wiring map generalization method being applicable to Study on Trend, the method includes following step Rapid:

Step 1. raw information obtains, and comprises transformer station and the geographical location information of load and railway superstructures letter Breath, acquisition source: electrical network EMS plateform system；

Transformer station and load are regarded as the node in uniform wiring diagram by step 2., and to node p therein_i Travel through coupled node according to its connection situation, thus it is done gravitation and makes a concerted effortCalculate, obtain

${\stackrel{\→}{f}}_{\mathrm{ai}}=\underset{j=0}{\overset{n}{\mathrm{\Σ}}}\frac{{{\stackrel{\→}{d}}^2}_{p_i{p}_j}}{k}$

$k=C\×\sqrt{W\×H/(m+1)}$

F in formula_aiThe vector of gravitation suffered by this point, n and m is respectively a p_iThere is the point of gravitation and repulsion Quantity and, d for some a p_jWith a p_iBetween distance vector, C is constant, W and H represents layout district respectively The width in territory and length；

Step 3. is evaded node p according to a limit_iCarry out a limit repulsionIt is calculated as follows formula:

${\stackrel{\&RightArrow;}{f}}_r(p_i,e_j)=\left\{\begin{array}{cc}R\&times;|d-d(p_i,e_j)|& d(p_i,e_j)<d\\ 0& d(p_i,e_j)\&GreaterEqual;d\end{array}\right.$

In formula, R is a limit repulsion constant, d (p_i,e_j) it is the vertical dimension between node and limit；D is point and limit Between minimum range；

Step 4. is evaded node p according to limit, limit_iCarry out a limit repulsionVector be calculated as follows:

${\stackrel{\&RightArrow;}{f}}_{\mathrm{ri}}(p_i,e_j)=\underset{j=0}{\overset{m}{\mathrm{\&Sigma;}}}\frac{k^2\&times;r_1}{{\stackrel{\&RightArrow;}{d}}_{p_i{p}_j}}+\underset{j=0}{\overset{n}{\mathrm{\&Sigma;}}}\frac{k^2\&times;r_2}{{\stackrel{\&RightArrow;}{d}}_{p_i{p}_j}}+\underset{j=0}{\overset{q}{\mathrm{\&Sigma;}}}\frac{k^2}{{\stackrel{\&RightArrow;}{d}}_{p_i{p}_j}}+{\stackrel{\&RightArrow;}{f}}_r(p_i,e_j)$

In formula, m is the nodes on feeder line different from present node；N is the other branch road of present node upper level On nodes；Q is remaining nodes；r₁For the node on feeder lines different from present node, it is scolded Power weight；r₂For the repulsion weight to it of the node on the other branch road of present node upper level；Generally, 1<r₁<r₂< 1.3,Point limit repulsion suffered by this point；

The gravitation of step 5. node and repulsion carry it into the node fortune introducing pull strength parameter after being combined to joint efforts Dynamic equation, thus mobile node.The equation of its band pull strength parameter is:

$x^{l+1}\left(p_i\right)=x^l\left(p_i\right)+f_x^l\left(p_i\right)-g\&times;x^l\left(p_i\right)-T_l$

$y^{l+1}\left(p_i\right)=y^l\left(p_i\right)+f_y^l\left(p_i\right)-g\&times;y^l\left(p_i\right)-T_l$

$T_l=\left\{\begin{array}{cc}0& j<=n\\ t\&times;(j-n)/m& j>n\end{array}\right.$

In formula, l is the iterations of node pi, and g is gravitational constant, and f is that this node is suffered to make a concerted effort, T_kFor leading Gravitational displacement, t is pull strength constant, and j is p_iSequence number in this circuit of some place, m and n is respectively p_i Point is at the load number of this circuit and substation line average load number；

Remaining node in uniform wiring diagram is repeated step 2～step 5 by step 6., if node traverses is complete Then restart the movement of node location from start node, until the final mean annual increment movement amount of node is less than a definite value (usually the 1/20 of present topology distribution total length), illustrates to make a concerted effort to trend towards zero, then suffered by each node Think that system reaches balance, i.e. within the scope of acceptable, thus terminate the shifting of this topology interior joint Dynamic.

Step 7. derives node final position, writes SVG.After loop iteration terminates, will obtain Each node and the final position of circuit, after being written into SVG, be finally completed this power distribution network uniform Wiring map generalization.

The present invention has the advantages that relative to prior art present invention introduces a limit evades and limit, limit Evade the distribution to node and circuit and be made that optimization greatly；The system requirement to SVG form can be met And make the amendment on arbitrary one-tenth graph grammar；Crisscross to circuit in geographical actual distribution, length across Spend big phenomenon and carry out depth optimization；Become figure speed rapid, meet all kinds of Situation Awareness System to its property The requirement of energy；Carrying out after voltage equal pitch contour renders as base map, the rendering effect of figure is well arranged, rule Rule property is strong, it is possible to be greatly promoted a power distribution network operations staff control to electrical network entirety situation.

Accompanying drawing explanation

Fig. 1 is somewhere, Zhejiang Province power distribution network geographical wiring diagram；

Fig. 2 is by this area's power distribution network uniform wiring diagram after Fig. 1 homogenization by this method；

Fig. 3 is the implementing procedure figure of this method；

Fig. 4 (a) geographical wiring diagram renders regional distribution chart；

Fig. 4 (b) uniformly wiring diagram renders regional distribution chart；

Fig. 5 (a) geographical wiring diagram each electric pressure inclusion region area distribution plot；

Fig. 5 (b) uniformly wiring diagram each electric pressure inclusion region area distribution plot；

Fig. 6 (a) geographical wiring diagram each electric pressure inclusion region area difference scattergram；

Fig. 6 (b) uniformly wiring diagram each electric pressure inclusion region area difference scattergram；

Fig. 7 (a) highest ranking voltage areas trend graph；

Fig. 7 (b) uniformly figure amplification trend graph.

Detailed description of the invention

The present invention chooses Zhejiang Province's County Level Distribution Network and it is carried out homogenization layout.This power distribution network is containing power supply Load 732, feeder line 15, lines branch 731, its geographical wiring diagram is as shown in Figure 1.This The parameter of example selects, and graphic result and service data result are as follows:

(1) parameter selects

This example chooses pull strength constant t=8.3, puts limit repulsion constant k=0.5, circuit repulsion constant R1=1.1, r2=1.2

(2) graphic correlation

Through being applicable to the modified model power of distribution net work structure, to lead the graphic structure after algorithm power selvage guide office completes clear Clear, layout is uniform, as shown in Figure 2.

(3) service data result

Successively the node in geographical wiring diagram is carried out the calculating of gravitation and repulsion in the step utilizing the present invention And after carrying out the movement of node, in the power distribution network uniform wiring diagram that the F&R algorithm after improvement obtains, supply Electric load does radial distribution along distribution line centered by transformer station.Being computed, the figure uniformity is 2.18, time-consuming 16.2 seconds of computing, the crossing number of feeder line and branch line is 0, with F&R algorithm for power transmission network Indices during layout compares the lifting more all having in various degree.Its method flow diagram such as Fig. 3 institute Show.

Below in conjunction with accompanying drawing, the invention will be further described.

Fig. 4 (a) and Fig. 4 (b) sets forth synchronization respectively with geographical wiring and uniform wiring Distribution network voltage equal pitch contour situation map for base map contrasts, and has the most qualitative following conclusion, it may be assumed that 1) all There are 230 cross points in the circuit resolution of even base map apparently higher than geographical wiring diagram, geographical wiring diagram, Uniformly scheme then without cross point；2) distorted region of uniform base map situation map, hence it is evident that less than the state of geographical wiring Gesture figure；3) uniformly the voltage equal pitch contour areal of wiring diagram is 14 considerably less than voltage equal pitch contour districts Territory number is the geographical wiring diagram of 30；To carry out determining quantitative analysis with lower part.

Can be observed by Fig. 5 (a) and Fig. 5 (b), the voltage equal pitch contour face of geographical wiring base map Long-pending time fluctuation is bigger than uniform wiring base map；Figure Fig. 6 (a) shows with Fig. 6 (b), uniformly The voltage equal pitch contour area of base map fluctuation direction homoplasy in time is more consistent than geographical wiring base map. Therefore uniformly the dynamic intuition of situation of base map is the softest, is more easy to be therefore easily perceived by humans.

Fig. 7 (a) and Fig. 7 (b) give the contrast of another performance: the electricity to same electric pressure Pressure surface amasss, and the area of uniform figure all has amplification；And voltage areas in geographical wiring situation is the least, all The amplification area that even figure is corresponding is the biggest；This shows, part inconspicuous in geographical wiring diagram, uniformly Obtaining expansion in figure to render, therefore uniformly the rendering capability of figure is higher.

Table 1

Table 1 gives the average Situation awareness parameter of 1 day 24 voltage situation map；It can be seen that uniformly The average peak valley number of the situation map of wiring base map is than the geographical the fewest half of wiring；Same isocontour flat All equal pitch contour quantity also lacks half.It addition, average single isocontour tortuosity is also few, but inconspicuous；By Rendering soft in uniform situation, its calculating time has also lacked 21%.

Claims (1)

1. being applicable to a power distribution network uniform wiring map generalization method for Study on Trend, its feature exists In, the method comprises the following steps:

Step 1. raw information obtains, and comprises transformer station and the geographical location information of load and railway superstructures Information, acquisition source: electrical network EMS plateform system；

The node in uniform wiring diagram is regarded by step 2. by transformer station and load, and to node p therein_i Travel through coupled node according to its connection situation, thus it is done gravitation and makes a concerted effortCalculate, Obtain

${\stackrel{\&RightArrow;}{f}}_{ai}=\underset{j=0}{\overset{n}{\&Sigma;}}\frac{{{\stackrel{\&RightArrow;}{d}}^2}_{p_i{p}_j}}{k}$

$k=C\&times;\sqrt{W\&times;H/(m+1)}$

F in formula_aiThe vector of gravitation suffered by this point, n and m is respectively a p_iThere are gravitation and repulsion Point quantity and, d for some a p_jWith a p_iBetween distance vector, C is constant, W and H respectively table Show width and the length of layout areas；

Step 3. is evaded node p according to a limit_iCarry out a limit repulsionIt is calculated as follows formula:

${\stackrel{\&RightArrow;}{f}}_r(p_i,e_j)=\left\{\begin{array}{cc}R\&times;|d-d(p_i,e_j)|& d(p_i,e_j)<d\\ 0& d(p_i,e_j)\&GreaterEqual;d\end{array}\right.$

In formula, R is a limit repulsion constant, d (p_i,e_j) it is the vertical dimension between node and limit；D is a little And the minimum range between limit；

Step 4. is evaded node p according to limit, limit_iCarry out a limit repulsionVector calculate such as Under:

${\stackrel{\&RightArrow;}{f}}_{ri}(p_i,e_j)=\underset{j=0}{\overset{m}{\mathrm{\&Sigma;}}}\frac{k^2\&times;r_1}{{\stackrel{\&RightArrow;}{d}}_{p_i{p}_j}}+\underset{j=0}{\overset{n}{\mathrm{\&Sigma;}}}\frac{k^2\&times;r_2}{{\stackrel{\&RightArrow;}{d}}_{p_i{p}_j}}+\underset{j=0}{\overset{q}{\mathrm{\&Sigma;}}}\frac{k^2}{{\stackrel{\&RightArrow;}{d}}_{p_i{p}_j}}+{\stackrel{\&RightArrow;}{f}}_r(p_i,e_j)$

In formula, m is the nodes on feeder line different from present node；N is other of present node upper level Nodes on road；Q is remaining nodes；r₁For the node on feeder lines different from present node to it Repulsion weight；r₂For the repulsion weight to it of the node on the other branch road of present node upper level；General feelings Under condition, 1 < r₁<r₂< 1.3,Point limit repulsion suffered by this point；

The gravitation of step 5. node and repulsion carry it into the joint introducing pull strength parameter after being combined to joint efforts The point equation of motion, thus mobile node；The equation of its band pull strength parameter is:

$x^{l+1}\left(p_i\right)=x^l\left(p_i\right)+f_x^l\left(p_i\right)-g\&times;x^l\left(p_i\right)-T_l$

$y^{l+1}\left(p_i\right)=y^l\left(p_i\right)+f_y^l\left(p_i\right)-g\&times;y^l\left(p_i\right)-T_l$

$T_l=\left\{\begin{array}{cc}0& j<=n\\ t\&times;(j-n)/m& j>n\end{array}\right.$

In formula, l is the iterations of node pi, and g is gravitational constant, and f is that this node is suffered to make a concerted effort, T_l For pull strength displacement, t is pull strength constant, and j is p_iSequence number in this circuit of some place, m and n It is respectively p_iPoint is at the load number of this circuit and substation line average load number；

Remaining node in uniform wiring diagram is repeated step 2～step 5 by step 6., if node traverses Complete, restart the movement of node location from start node, until the final mean annual increment movement amount of node is less than working as The 1/20 of front topology distribution total length, illustrates to make a concerted effort to trend towards zero suffered by each node, then it is assumed that system Reach balance, i.e. within the scope of acceptable, thus terminate the movement of this topology interior joint；

Step 7. derives node final position, writes SVG；After loop iteration terminates, will To each node and the final position of circuit, after being written into SVG, it is finally completed this power distribution network Uniformly wiring map generalization.