CN107292442A - A kind of 10kV power distribution networks low-voltage plans improvement and appraisal procedure automatically - Google Patents
A kind of 10kV power distribution networks low-voltage plans improvement and appraisal procedure automatically Download PDFInfo
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Abstract
A kind of 10kV power distribution networks low-voltage administers automatic planning and appraisal procedure, including one-touch automatic planning, the multiple step format guiding planning and the comprehensive assessment of 10kV power distribution network low-voltage resolutions of the improvement of 10kV power distribution networks low-voltage that 10kV power distribution networks low-voltage is administered.The flow for a set of improvement low-voltage that the present invention is designed, one-touch automatic planning resolution is realized by software.The guiding batch ticket that the present invention is also designed, some measure in software pathfinder selection restringing, reactive-load compensation and configuration three kinds of control measures of pressure regulator, every time selection only carries out the improvement of single step, can automatically be planned on the basis of single step transformation.10kV power distribution networks low-voltage of the present invention administers the evaluation system that comprehensive estimation method devises three dimensionality, tries to achieve index weights by constructing auxiliary judgment matrix and auxiliary summation matrix, finally realizes the calculating process of assessment.
Description
Technical field
Improvement and appraisal procedure, category Electric Power Network Planning technology neck are planned automatically the present invention relates to a kind of 10kV power distribution networks low-voltage
Domain.
Background technology
The low-voltage problem of 10KV distribution lines, shows as voltage the showing less than nominal voltage 7% of line end node
As when that is, the voltage of line end is less than 9.3KV, being just referred to as 10KV power distribution network low-voltages.Due to 10KV distribution line knots
The variation of structure, the reason for causing power distribution network low-voltage is also not quite similar, it is therefore desirable to enter the hand-manipulating of needle using specific resolution
Property is administered.Traditional power distribution network low-voltage governance process may be summarized to be following four step：(1) history data is passed through
10kV power distribution network low-voltage present situations are analyzed with on-the-spot investigation；(2) the reason for analysis causes 10kV power distribution network low-voltages；(3) it is directed to
Reason drafts specific resolution；(4) 10kV distribution lines are transformed according to resolution, verifies regulation effect.
Four steps of 10kV power distribution networks low-voltage improvement are completed, it is necessary to expend substantial amounts of manpower and financial resources, and can not
Guarantee reaches optimal regulation effect.
The content of the invention
The purpose of the present invention is, in order to efficiently and economically to there are problems that the 10kV power distribution networks of low-voltage are administered,
The present invention proposes a kind of 10kV power distribution networks low-voltage and administers automatic planning and appraisal procedure.
Realize the technical scheme is that, a kind of 10kV power distribution networks low-voltage administers automatic planning and appraisal procedure, bag
Include 10kV power distribution networks low-voltage improvement one-touch automatic planning, 10kV power distribution networks low-voltage administer multiple step format guiding planning and
The comprehensive assessment of 10kV power distribution network low-voltage resolutions.
The 10kV power distribution networks low-voltage administers one-touch automatic programme, the replacing of row conductor is entered first, next adds
Plus reactive power compensator, finally add pressure regulator；And realize that a key generates the function of resolution with software, pressed by clicking on
Key, automatically generates resolution.
It is as follows that the 10kV power distribution networks low-voltage administers the one-touch flow planned automatically：
(1) according to 10KV line constructions, the topological diagram of 10KV circuits is drawn with software, and fills out letter needed for Load flow calculation
Breath, carries out Load flow calculation；
(2) according to calculation of tidal current, if there is low-voltage problem, then prioritizing selection restringing；
(3) if restringing can not be fully solved low-voltage problem, the side that reactive-load compensator is configured on bar is taken
Method, makes its power factor be promoted to 0.9；
(4) if reactive-load compensation still can not administer low-voltage problem completely, the method for taking addition pressure regulator；Institute
On the circuit for occurring low-voltage problem, since endpoint node, first voltage is traveled through respectively to power supply direction and is more than 9.5KV's
Node, by configuring the no-load voltage ratio of pressure regulator at these nodes, so that endpoint node voltage increase is to 9.3KV；If a plurality of
Low-voltage lines need to configure public pressure regulator in same node, then carried according to the minimum voltage in these low-voltage lines is made
9.3KV is risen to configure the no-load voltage ratio of the pressure regulator.
The multiple step format guiding planning that the 10kV power distribution networks low-voltage is administered, to the low-voltage problems of 10kV power distribution networks according to
The demand of user, allows user to select a kind of administration way from restringing, addition reactive power compensator and configuration pressure regulator, often
The improvement of secondary progress single step；；The function of multiple step format guiding planning is realized with software：The improvement of single has often been carried out, use is just allowed
Family reselects administration way, until all node voltages meet the requirements.
The 10kV power distribution networks low-voltage administers comprehensive estimation method, and the appraisal procedure devises the assessment body of three dimensionality
It is that three dimensions are respectively：Regulation effect, economic benefit and development adaptability；Set up and refer to more by general objective of these three dimensions
Target evaluation system.
The appraisal procedure, during agriculture products weight, sets up " auxiliary judgment matrix " and " auxiliary summation matrix "；It is described auxiliary
Judgment matrix is helped, is shown below：
Wherein, auxiliary judgment matrix W is n × n, and n ＞ 2 square formation, its diagonal is 0, meets wij=1/wji, i ≠ j, i,
J=1,2,3 ... n, wijFor i-th of element aiWith j-th of element ajThe ratio of relative importance；Auxiliary is determined according to following formula
Judgment matrix W value：
After obtaining, each row of matrix is summed, obtains aiding in summation matrix, is shown below：
Wherein,
The value of the judgment matrix determined with auxiliary judgment matrix and auxiliary summation matrix is as shown in the table：
Table judgment matrix standard degree
The beneficial effects of the invention are as follows the present invention devises the flow of a set of improvement low-voltage, and one is realized by software
Keyed plans resolution automatically：By clicking on a button, corresponding resolution is automatically generated.The present invention, which have also been devised, to draw
Conduction batch ticket, by some in software pathfinder selection restringing, reactive-load compensation and configuration three kinds of control measures of pressure regulator
Measure, every time selection only carries out the improvement of single step, can automatically be planned on the basis of single step transformation.10kV of the present invention matches somebody with somebody
Electrical network low voltage administers the evaluation system that comprehensive estimation method devises three dimensionality, is asked by constructing auxiliary judgment matrix and auxiliary
Index weights are obtained with Matrix Calculating, the calculating process of assessment is finally realized with software.
Brief description of the drawings
Fig. 1 is the flow chart of the one-touch automatic planning resolution of the embodiment of the present invention；
Fig. 2 is the flow chart of the guiding batch ticket resolution of the embodiment of the present invention；
Fig. 3 is the structure of the comprehensive assessment system regulation effect of the embodiment of the present invention；
Fig. 4 is the structure of the comprehensive assessment system economic benefit of the embodiment of the present invention；
Fig. 5 is the structure of the comprehensive assessment system development adaptability of the embodiment of the present invention；
Fig. 6 is the topological diagram that the embodiment of the present invention is drawn；
Fig. 7 is the calculation of tidal current for the topological diagram that the embodiment of the present invention is drawn；
Fig. 8 is the result of the one-touch automatic planning resolution of the embodiment of the present invention；
Fig. 9 is the result of the guiding batch ticket resolution of the embodiment of the present invention.
Embodiment
A kind of 10kV power distribution networks low-voltage of the present embodiment administers the flow planned automatically as shown in figure 1, comprising the following steps that：
Step 1, according to 10KV line constructions, the topological diagram of 10KV circuits is drawn with software, and needed for filling out Load flow calculation
Information, carries out Load flow calculation.
Step 2, according to calculation of tidal current, if there is low-voltage problem, then prioritizing selection restringing, its method
It is, since power supply point：Travel through out it is all there are problems that the circuit of low-voltage, if there is a plurality of low-voltage lines, then first select
Select branch node voltage highest circuit to be changed, often carry out carrying out a Load flow calculation after a wire replacing, according to tide
The result of stream calculation judges whether to also need to be administered.The foundation of wire replacing is：The transmission capacity of circuit between decision node
Whether its economic transmission capacity is more than, if it does, then changing this section of transmission pressure, the wire diameter of replacing need to meet its warp
The transmission capacity that helps is more than the transmission capacity of original wire.Shown in the economic transmission capacity table 1 of conventional wire.
The Conductor's Economic transmission capacity of table 1
| 10kV line conductors section (mm2) | Economic transmission capacity (KVA) |
| 70 | 2160 |
| 95 | 2940 |
| 0 | 3710 |
| 150 | 4640 |
| 185 | 5720 |
| 240 | 7420 |
| 300 | 9280 |
| 400 | 12370 |
In view of economy, under the requirement for meeting transmission capacity, the minimum wire of selection line footpath.For example, original wire
Line footpath be 70, transmission capacity is 3000KVA, then software can automatically select line footpath be 120 wire changed.It is so anti-
It is multiple, until calculation of tidal current is displayed without lower voltage node or the transmission capacity of all wires is respectively less than its correspondence line footpath
Economic transmission capacity.
Step 3, if restringing can not be fully solved low-voltage problem, take and reactive-load compensator is configured on bar
Method, makes its power factor be promoted to 0.9.Its method is：
The minimum node parallel reactive of selection voltage compensates dress in the lower voltage node that institute's power factor is less than 0.9
Put, so that power factor is promoted to 0.9 to configure corresponding compensation capacity.Often add after a reactive power compensator, with regard to carrying out
Load flow calculation.
So repeatedly, until the power factor for the node for occurring low-voltage problem is all higher than 0.9 or Load flow calculation knot
Fruit is displayed without lower voltage node.
Step 4, if reactive-load compensation still can not administer low-voltage problem completely, the method for taking addition pressure regulator.
On the circuit of occurred low-voltage problem, since endpoint node, first voltage is traveled through respectively to power supply direction and is more than
9.5KV node, by configuring the no-load voltage ratio of pressure regulator at these nodes, so that endpoint node voltage increase is to 9.3KV.If
There are a plurality of low-voltage lines to need to configure public pressure regulator in same node, then minimum in these low-voltage lines according to making
Voltage increase configures the no-load voltage ratio of the pressure regulator to 9.3KV.
When carrying out the formulation of resolution, it can select to carry out one-touch automatic planning or guide formula substep rule
Draw.Guiding batch ticket provides restringing, addition reactive power compensator and three kinds of pressure regulator of configuration for policymaker first and controlled
Reason measure, only carries out the selection of a control measures every time, selectes after control measures, only carries out the transformation of single step.
The single step process of restringing is：Since power supply point, first branch node voltage highest circuit is selected to carry out more
Change, only one section lead of transformation complies with economic transmission capacity requirement every time.
The single step process of reactive-load compensation is：Software first determines whether that the power factor that there are problems that the line end of low-voltage is
No to be less than 0.9, the minimum node parallel reactive of selection voltage compensates dress in the lower voltage node that institute's power factor is less than 0.9
Put, so that power factor is promoted to 0.9 to configure corresponding compensation capacity.If all have the line end of low-voltage
Power factor be all higher than 0.9, then advise policymaker select other control measures.
Configuration pressure regulator single step process be：The low-voltage lines for selecting node voltage minimum, since endpoint node, to
Power supply direction travels through the node that first voltage is more than 9.5KV, by configuring the no-load voltage ratio of pressure regulator at this node, makes end segment
Voltage increase is put to 9.3KV.If this node has been configured toning depressor, its no-load voltage ratio is reconfigured so that the low voltage lines
The endpoint node voltage on road is more than 9.3KV.
The transformation of a single step is often completed, with regard to carrying out a Load flow calculation, judges whether complete to administer from calculation of tidal current
Into.So repeatedly, until calculation of tidal current display is administered and completed.
In addition to guiding batch ticket, in order to meet policymaker to economy and the particular/special requirement of regional development, also carry
Supplied to manually adjust the function of control measures, can as needed the line footpath of restringing, transform the length of wire, reactive-load compensation
Device, the position of pressure regulator and quantity.Manually adjust as shown in Figure 2 with the flow of guiding batch ticket resolution.
The appraisal procedure of the present embodiment 10kV power distribution network low-voltage resolutions is as follows：
Step 1, regulation effect is set up, the low-voltage of three aspects of economic benefit and development adaptability administers evaluation system,
As shown in Fig. 3,4,5.
Step 2, to each target setting weight of evaluation system：
Companion matrix is determined by constructing " auxiliary judgment matrix " and " auxiliary summation matrix ", binding characteristic vector method is asked
Go out index weights.
Auxiliary judgment matrix, as shown in formula (1)：
Wherein, auxiliary judgment matrix W is n × n, and n ＞ 2 square formation, its diagonal is 0, meets wij=1/wji, i ≠ j, i,
J=1,2,3 ... n, wijFor i-th of element aiWith the ratio of j-th of element aj relative importance, auxiliary is determined according to formula (2)
Judgment matrix W value：
After obtaining, each row of matrix is summed, obtains aiding in summation matrix, as shown in formula (3)：
Wherein,
The value of the judgment matrix determined with " auxiliary judgment matrix " and " auxiliary summation matrix " is as shown in table 2.
The judgment matrix standard degree of table 2
Each index weights are obtained with feature vector method.Assessment models and index weights are as shown in table 3：
The power distribution network low-voltage of table 3 administers assessment models and index weights
Step 3, the evaluation to each index sets standards of grading.
Different indexs has different dimension and the order of magnitude, and different evaluation indexes is needed to set up unified evaluation mark
It is accurate.Assuming that index initial calculation value is that then it is evaluated with hundred-mark system, the standards of grading of index are as shown in table 4：
The index standards of grading of table 4
Step 5, the scoring for obtaining regulation effect, economic benefit and development adaptability is calculated.
The weight of indexs at different levels and the score of corresponding index are obtained respectively, and regulation effect, economic benefit are obtained by calculating
With the assessment result of development adaptability.Assuming that there is m two-level index a under first class index A1,a2,...am, its weight is w1,
w2,...,wm；Two-level index aiUnder have n three-level index ai1,ai2,...,ain, its corresponding weight is wi1,wi2,...,wim,
Its is corresponding to be scored at vi1,vi2,...,vim, then the final score of the first class index be：
So that certain province 35KV dries moat outside a city wall city change 10KV911 Yanshan Mountain line transformation process as an example, and with reference to accompanying drawing, to the technical side of the present invention
Case is described in further detail.
The detailed process of one-touch automatic planning resolution is as follows：
Step 1, the topological diagram of Yanshan Mountain line is drawn, and fills out the property value of relevant device, as shown in Figure 6.
Step 2, using Load flow calculation function, the trend distribution of circuit is calculated, as a result low-voltage occurs in display portion node
Problem, as shown in fig. 7, the voltage of all grey line ends is below 9.3KV, minimum voltage reaches 6.651KV, more than voltage
More Lower Limit Amplitude.
Step 3, Yanshan Mountain line low-voltage problem is administered with automatic planning function, as a result as shown in Figure 8：By node 0 to node
Wire replacing between 57 is LGJ-120, is LGJ-90 by the wire replacing between 57 to 149；In node 149XZ73,149XZ81 and
Reactive power compensator is added at 333 respectively；Pressure regulator is configured at node 57.All line end voltages are big after improvement
In 9.3KV, this area's low-voltage problem has been solved.The detailed process of guiding batch ticket resolution is as follows：
Step 1, select restringing and manually adjust line footpath for 150mm2, the position of restringing is node 0 to node
333。
Step 2, selection addition pressure regulator, the position of institute's configuration pressure regulator is node 57.
Transformation result is as shown in figure 9, guiding batch ticket equally can after restringing and configuration pressure regulator is carried out
Solve the problems, such as the low-voltage of Yanshan Mountain line.
The detailed process of comprehensive assessment resolution is as follows：
Assessed respectively with software guiding batch ticket and it is one-touch plan both modification schemes automatically, two schemes tool
The transformation process of body is as shown in table 5：
The modification scheme of table 5
By software evaluation, assessment result is obtained as shown in table 6：
The assessment result of table 6
From assessment result, two kinds of resolutions can effectively administer the low-voltage problem of Yanshan Mountain line.Scheme one
Regulation effect is than more prominent, and compared to scheme two, its economic benefit is not good enough, but development adaptability has some superiority；Scheme
Two regulation effect is good, and because the circuit of transformation is short, therefore its economic benefit is fine.In summary, the low electricity of Yanshan Mountain line
If pressure, which is administered, pursues optimal regulation effect and preferable development adaptability, selection scheme one is answered；If it is considered that each side because
Element, then regulation effect and economic benefit should be selected to have the scheme two of high levels as last alternative.
Claims (6)
1. a kind of 10kV power distribution networks low-voltage administers automatic planning and appraisal procedure, it is characterised in that methods described includes 10kV
One-touch automatic planning, the multiple step format guiding planning of 10kV power distribution networks low-voltage improvement and the 10kV that power distribution network low-voltage is administered match somebody with somebody
The comprehensive assessment of electrical network low voltage resolution.
2. a kind of 10kV power distribution networks low-voltage according to claim 1 administers automatic planning and appraisal procedure, its feature exists
In the one-touch automatic planning process that the 10kV power distribution networks low-voltage is administered is as follows：
(1) according to 10KV line constructions, the topological diagram of 10KV circuits is drawn with software, and fills out Load flow calculation information needed, is entered
Row Load flow calculation；
(2) according to calculation of tidal current, if there is low-voltage problem, then prioritizing selection restringing；
(3) if restringing can not be fully solved low-voltage problem, the method that reactive-load compensator is configured on bar is taken, is made
Its power factor is promoted to 0.9；
(4) if reactive-load compensation still can not administer low-voltage problem completely, the method for taking addition pressure regulator；It is all go out
On the circuit of existing low-voltage problem, since endpoint node, the section that first voltage is more than 9.5KV is traveled through respectively to power supply direction
Point, by configuring the no-load voltage ratio of pressure regulator at these nodes, so that endpoint node voltage increase is to 9.3KV；If a plurality of low
Voltage circuit needs to configure public pressure regulator in same node, then lifted according to the minimum voltage made in these low-voltage lines
The no-load voltage ratio of the pressure regulator is configured to 9.3KV.
3. a kind of 10kV power distribution networks low-voltage according to claim 1 administers automatic planning and appraisal procedure, its feature exists
In, the multiple step format guiding planning that the 10kV power distribution networks low-voltage is administered, to the low-voltage problems of 10kV power distribution networks according to user
Demand, allow user from restringing, selecting a kind of administration way in addition reactive power compensator and configuration pressure regulator, every time only
Carry out the improvement of single step；The function of multiple step format guiding planning is realized with software：The improvement of single has often been carried out, user has just been allowed again
Administration way is selected, until all node voltages meet the requirements.
4. a kind of 10kV power distribution networks low-voltage according to claim 1 administers automatic planning and appraisal procedure, its feature exists
In the 10kV power distribution networks low-voltage administers comprehensive estimation method, and the appraisal procedure devises the evaluation system of three dimensionality, three
Individual dimension is respectively：Regulation effect, economic benefit and development adaptability；Commenting for multi objective is set up by general objective of these three dimensions
Estimate system.
5. a kind of 10kV power distribution networks low-voltage according to claim 4 administers automatic planning and appraisal procedure, its feature exists
In the appraisal procedure during agriculture products weight, is set up " auxiliary judgment matrix " and " auxiliary summation matrix "；The auxiliary is sentenced
Disconnected matrix W, is shown below：
<mrow>
<mi>W</mi>
<mo>=</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mfrac>
<msub>
<mi>w</mi>
<mn>1</mn>
</msub>
<msub>
<mi>w</mi>
<mn>2</mn>
</msub>
</mfrac>
</mtd>
<mtd>
<mn>...</mn>
</mtd>
<mtd>
<mfrac>
<msub>
<mi>w</mi>
<mn>1</mn>
</msub>
<msub>
<mi>w</mi>
<mi>n</mi>
</msub>
</mfrac>
</mtd>
</mtr>
<mtr>
<mtd>
<mfrac>
<msub>
<mi>w</mi>
<mn>2</mn>
</msub>
<msub>
<mi>w</mi>
<mn>1</mn>
</msub>
</mfrac>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>...</mn>
</mtd>
<mtd>
<mfrac>
<msub>
<mi>w</mi>
<mn>2</mn>
</msub>
<msub>
<mi>w</mi>
<mi>n</mi>
</msub>
</mfrac>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>...</mn>
</mtd>
<mtd>
<mn>...</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>...</mn>
</mtd>
</mtr>
<mtr>
<mtd>
<mfrac>
<msub>
<mi>w</mi>
<mi>n</mi>
</msub>
<msub>
<mi>w</mi>
<mn>1</mn>
</msub>
</mfrac>
</mtd>
<mtd>
<mfrac>
<msub>
<mi>w</mi>
<mi>n</mi>
</msub>
<msub>
<mi>w</mi>
<mn>2</mn>
</msub>
</mfrac>
</mtd>
<mtd>
<mn>...</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
Wherein, auxiliary judgment matrix W is n × n, and n ＞ 2 square formation, its diagonal is 0, meets wij=1/wji, i ≠ j, i, j=1,
2,3 ... n, wijFor i-th of element aiWith j-th of element ajThe ratio of relative importance；Auxiliary judgment is determined according to following formula
The value of matrix W：
After obtaining, each row of matrix is summed, obtains aiding in summation matrix, is shown below：
<mrow>
<msub>
<mi>V</mi>
<mi>i</mi>
</msub>
<mo>=</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<mo>.</mo>
</mtd>
</mtr>
<mtr>
<mtd>
<mo>.</mo>
</mtd>
</mtr>
<mtr>
<mtd>
<mo>.</mo>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mi>n</mi>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
Wherein,
The value of the judgment matrix determined with auxiliary judgment matrix and auxiliary summation matrix is as shown：
The judgment matrix standard degree of table 1
6. a kind of 10kV power distribution networks low-voltage according to claim 3 administers automatic planning and appraisal procedure, its feature exists
In,
The single step process of the restringing is：Since power supply point, first branch node voltage highest circuit is selected to carry out more
Change, only one section lead of transformation complies with economic transmission capacity requirement every time；
It is described addition reactive power compensator single step process be：Software first determines whether the work(that there are problems that the line end of low-voltage
Whether rate factor is less than 0.9, the minimum node of the selection voltage nothing in parallel in the lower voltage node that institute's power factor is less than 0.9
Reactive power compensation installations, so that power factor is promoted to 0.9 to configure corresponding compensation capacity；If all have low-voltage
The power factor of line end is all higher than 0.9, then advises that policymaker selects other control measures；
It is described configuration pressure regulator single step process be：The low-voltage lines for selecting node voltage minimum, since endpoint node, to
Power supply direction travels through the node that first voltage is more than 9.5KV, by configuring the no-load voltage ratio of pressure regulator at this node, makes end segment
Point voltage increase if this node has been configured toning depressor, reconfigures its no-load voltage ratio so that the low voltage lines to 9.3KV
The endpoint node voltage on road is more than 9.3KV.
Priority Applications (1)
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