CN107591799A - A kind of power distribution network short-term planning method based on net capability - Google Patents

A kind of power distribution network short-term planning method based on net capability Download PDF

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CN107591799A
CN107591799A CN201710750266.1A CN201710750266A CN107591799A CN 107591799 A CN107591799 A CN 107591799A CN 201710750266 A CN201710750266 A CN 201710750266A CN 107591799 A CN107591799 A CN 107591799A
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distribution network
power distribution
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node
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CN107591799B (en
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李颖
梁海峰
刘应明
刘建华
吕波
刘峰
汤铁军
余家志
龙腾江
刘世良
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Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

Abstract

The invention discloses a kind of power distribution network short-term planning method based on net capability, first, the transformation of line switching position and line adjustment is carried out, by the position for optimizing line switching, a part of load of heavy-haul line is transferred on light-loaded circuit, makes the sharing of load of power distribution network evenly；Then the power supply capacity of every transformer in power distribution network is calculated, and analyzes the bottleneck of limitation power supply capacity lifting, corresponding modification measures are taken according to different types of bottleneck, reach the purpose for improving power distribution network net capability；Fail-safe analysis finally is carried out to current power distribution network.If reliability is unsatisfactory for requiring, reach the purpose of raising reliability by upgrading the measure of circuit, lifting reactive compensation capacity and increase interconnector, sharing of load of the invention by balancing power distribution network, appropriate upgrading is carried out to existing equipment, realizes the power supply capacity that power distribution network is improved while improving Distribution Network Equipment utilization rate, not reducing distribution network reliability.

Description

A kind of power distribution network short-term planning method based on net capability
Technical field
The present invention relates to electric power network technique field, more particularly to a kind of power distribution network short-term planning side based on net capability Method.
Background technology
With the fast development of social economy, the continuous acceleration of urbanization process, urban power distribution network load is in rapid growth While, the upgrading construction cost of power network is also improving constantly.Traditional planning mode is new mainly on the basis of present situation power network Circuit or installation new equipment are built, does not consider how to lift the utilization rate of power network existing equipment, while also do not account for distribution The horizontal tremendous influence increasingly improved to power distribution network of automation.Therefore using distribution network automated under intelligent grid environment Device, by lifting the transmission capacity of power network existing equipment and circuit, reach the purpose for improving power distribution network power supply capacity, reduction is matched somebody with somebody The upgrading construction cost of power network is feasible.
The content of the invention
In view of this, it is an object of the invention to provide a kind of power distribution network short-term planning method based on net capability, By balancing the sharing of load of power distribution network, appropriate upgrading is carried out to existing equipment, realizes and is improving Distribution Network Equipment Utilization rate, the power supply capacity that power distribution network is improved while do not reduce distribution network reliability.
The purpose of the present invention is achieved through the following technical solutions：
A kind of power distribution network short-term planning method based on net capability of the present invention, comprises the following steps：
Step 1) change line switching position come balanced circuit and transformer load rate：
Step 1.1：Establish object function for power supply capacity is maximum, the load factor equilibrium degree of transformer is optimal and interconnection away from From most short plan model, constraints is transformer capacity constraint, capacity of trunk constraint and voltage constraint；
Step 1.2：For above-mentioned model, the position of line switching is optimized using genetic algorithm, by heavy-haul line On sub-load be transferred on light-loaded circuit and run, make the load factor of circuit evenly；
Step 2) pass through the power supply capacity of the upgrading raising power distribution network to existing equipment：
Step 2.1：During power supply capacity is calculated, there is the node for being unsatisfactory for constraint and now these nodes in record Load growth ratio；
Step 2.2：All nodes are ranked up from small to large according to load growth ratio；
Step 2.3：For the different situations of above-mentioned node, different strategies is respectively adopted and carries out upgrading：
Step 2.4：The reliability of current power distribution network is calculated by Monte Carlo Analogue Method, and it is negative to power failure duration, power failure Lotus, power failure position and safety at power cut are recorded, analyzed, for because capacity of trunk and quality of voltage are unsatisfactory for requiring and cause Power failure be marked, stop planning if reliability constraint is met, export programme, be otherwise transferred to step 3；
Step 3) pass through lines escalation, installation reactive power compensator and interconnection optimization method lifting distribution network reliability：
Step 3.1：First, to out-of-limit due to capacity of trunk and caused by have a power failure and carry out the sequence of power failure influence value, order For from big to small, power failure influence value is the product of power failure duration and power failure load, for coming circuit above, is paid the utmost attention to Lines escalation is carried out to it；
Step 3.2：Secondly, the power failure influence value for causing to have a power failure to unqualified due to quality of voltage is counted side by side Sequence, its reactive capability for needing to compensate is calculated according to its voltage deviation, reactive compensation capacity limit value gives in advance, more than limit value Afterwards, then mend untill limit value；
Step 3.3：Again, fail-safe analysis is carried out to power distribution network, if reliability is still unsatisfactory for constraint requirements, to it Interconnection position of the switch optimization is carried out again, is established and more feasible is turned to improve the reliability of power distribution network, Zhi Daoke for passage During by sexual satisfaction constraint requirements, program results is exported；
Step 3.4：Calculate the net capability of program results scheme power distribution network.
Further, in step 1.1, concrete model is：
Si+ΔSi≤Ci (6)
In formula, M represents the number of units of power distribution network transformer；FiRepresent the load factor of i-th transformer；FmRepresent current power distribution The Rate of average load of net transformer；N represents newly-increased interconnection travel permit number；DiRepresent the length of i-th interconnector；SmRepresent The load of m platforms transformer institute band；SiWith Δ SiThe load and therefore caused network loss of i-th line road institute band are represented respectively；TmGeneration The capacity of m-th of transformer of table；CiRepresent the capacity on i-th line road；UiRepresent the top voltage of i-th feeder line；uiRepresent i-th The terminal voltage of bar feeder line；For power factor；RiAnd XiResistance and reactance for i-th line road；uhiFor on i-th line road Horizontal pressure drop；usiFor longitudinal pressure drop on i-th line road；UminAnd UmaxFor the lower and upper limit of voltage.
Further, in the step 2.3), including situations below and it is corresponding processing strategy it is as follows：
Situation I：Node for being unsatisfactory for transformer capacity constraint, if load growth ratio of the institute with node is less than 1.2 A liter appearance transformation is then carried out to transformer, if growth ratio is more than 1.2, abandons transforming transformer institute band node set, sequentially Transformation comes node thereafter；
Situation II：Node for being unsatisfactory for circuit overload constraint, if the line footpath of circuit is smaller, causes circuit excessively negative Lotus, then upgrading is carried out to this circuit, increase the line footpath of circuit, the line cost for often upgrading 1km is designated as C；
Situation III：Node for being unsatisfactory for node voltage constraint, if the voltage out-of-limit of the endpoint node of certain circuit, Then install reactive power compensator or increase and decrease reactive compensation capacity additional on the circuit, often increase 1MVar reactive compensation capacities, by it Cost is designated as moC, moFor a cost conversion constant, it is no longer compensate for if reactive compensation capacity reaches limit value.
Further, to the single improvement cost of certain node more than noDuring C, then stop transforming the node, sequentially behind transformation Node；If the improvement cost sum of node set is transformed in transformation process more than noDuring C, then stop this transformation, noFor one Individual constant, its size determine according to the estimated programmed cost of power distribution network.
The beneficial effects of the invention are as follows：
(1) sharing of load of active balance power distribution network of the present invention, showing for distribution network load distribution inequality is significantly improved As；
(2) reach the purpose of investment reduction and increase power supply capacity by the transformation and optimization to power distribution network, improve and match somebody with somebody The utilization rate of power network existing equipment；
(3) while power supply capacity is improved, the reliability of power distribution network is ensure that further through a series of means, meets use The demand at family, there is directive significance by short-term planning construction of the programme that this method is made to power distribution network；
(4) this method realizes the purpose that power supply capacity is improved on the basis of reliability is not reduced by a series of measures, Make power distribution network short-term planning scheme safer, more economical, can be very good to expand to different types of urban power distribution network, possess good Good autgmentability.
Other advantages, target and the feature of the present invention will be illustrated in the following description to a certain extent, and And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke To be instructed from the practice of the present invention.The target and other advantages of the present invention can be wanted by following specification and right Book is sought to realize and obtain.
Brief description of the drawings
In order that the object, technical solutions and advantages of the present invention are clearer, the present invention is made below in conjunction with accompanying drawing into The detailed description of one step, wherein：
Fig. 1 is the method flow schematic diagram of the present invention；
Fig. 2 is node power distribution web frame figure；
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.It should be appreciated that preferred embodiment Only for the explanation present invention, the protection domain being not intended to be limiting of the invention.
Fig. 1 is the schematic flow sheet of the method for the invention, as illustrated, the present invention includes three big steps in general： First, the transformation of line switching position and line adjustment is carried out, by optimizing the position of line switching, by one of heavy-haul line Divide load to be transferred on light-loaded circuit, make the sharing of load of power distribution network evenly.
Then the power supply capacity of every transformer in power distribution network is calculated, and analyzes the bottleneck of limitation power supply capacity lifting, root Corresponding modification measures are taken according to different types of bottleneck, carry out elimination gap, power distribution network net capability is improved so as to reach Purpose.
Fail-safe analysis finally is carried out to current power distribution network, if reliability is unsatisfactory for requiring, for thin in power distribution network Weakness is transformed, and is improved reliably by the measure for upgrading circuit, lifting reactive compensation capacity and increase interconnector to reach Property purpose, and calculate the power supply capacity of now power distribution network.
Specifically, a kind of power distribution network short-term planning method based on net capability of the invention, including following step Suddenly：
Step 1) change line switching position come balanced circuit and transformer load rate：
Step 1.1：Establish object function for power supply capacity is maximum, the load factor equilibrium degree of transformer is optimal and interconnection away from From most short plan model, constraints is transformer capacity constraint, capacity of trunk constraint and voltage constraint；
Concrete model is：
Si+ΔSi≤Ci (6)
In formula, M represents the number of units of power distribution network transformer, FiRepresent the load factor of i-th transformer；FmRepresent current power distribution The Rate of average load of net transformer；N represents newly-increased interconnection travel permit number；DiRepresent the length of i-th interconnector；SmRepresent The load of m platforms transformer institute band；SiWith Δ SiThe load and therefore caused network loss of i-th line road institute band are represented respectively；TmGeneration The capacity of m-th of transformer of table；CiRepresent the capacity on i-th line road；UiRepresent the top voltage of i-th feeder line；uiRepresent i-th The terminal voltage of bar feeder line；For power factor；RiAnd XiResistance and reactance for i-th line road；uhiFor on i-th line road Horizontal pressure drop；usiFor longitudinal pressure drop on i-th line road；UminAnd UmaxFor the lower and upper limit of voltage.
Step 1.2：For above-mentioned model, the position of line switching is optimized using genetic algorithm, by heavy-haul line On sub-load be transferred on light-loaded circuit and run, make the load factor of circuit evenly；
Step 2) pass through the power supply capacity of the upgrading raising power distribution network to existing equipment：
Step 2.1：During power supply capacity is calculated, there is the node for being unsatisfactory for constraint and now these nodes in record Load growth ratio；
Step 2.2：All nodes are ranked up from small to large according to load growth ratio；
Step 2.3：For the different situations of above-mentioned node, different strategies is respectively adopted and carries out upgrading, specific to In practice, including but not limited to situations below and corresponding processing strategy is as follows：
Situation I：Node for being unsatisfactory for transformer capacity constraint, if load growth ratio of the institute with node is less than 1.2 A liter appearance transformation is then carried out to transformer, if growth ratio is more than 1.2, abandons transforming transformer institute band node set, sequentially Transformation comes node thereafter；
Situation II：Node for being unsatisfactory for circuit overload constraint, if the line footpath of circuit is smaller, causes circuit excessively negative Lotus, then upgrading is carried out to this circuit, increase the line footpath of circuit, the line cost for often upgrading 1km is designated as C；
Situation III：Node for being unsatisfactory for node voltage constraint, if the voltage out-of-limit of the endpoint node of certain circuit, Then install reactive power compensator or increase and decrease reactive compensation capacity additional on the circuit, often increase 1MVar reactive compensation capacities, by it Cost is designated as moC, moFor a cost conversion constant, it is no longer compensate for if reactive compensation capacity reaches limit value.
Need it is especially set out, if to the single improvement cost of certain node more than noDuring C, then stop transforming the section Point, node below is transformed in order；If the improvement cost sum of node set is transformed in transformation process more than noDuring C, then Stop this transformation, noFor a constant, its size determines according to the estimated programmed cost of power distribution network, and such as estimated programmed cost is not 1.2 times of line cost must be exceeded, then no1.2 are taken, this similar kind calculates.
Step 2.4：The reliability of current power distribution network is calculated by Monte Carlo Analogue Method, and it is negative to power failure duration, power failure Lotus, power failure position and safety at power cut are recorded, analyzed, for because capacity of trunk and quality of voltage are unsatisfactory for requiring and cause Power failure be marked, stop planning if reliability constraint is met, export programme, be otherwise transferred to step 3；
Step 3) pass through lines escalation, installation reactive power compensator and interconnection optimization method lifting distribution network reliability：
Step 3.1：First, to out-of-limit due to capacity of trunk and caused by have a power failure and carry out the sequence of power failure influence value, order For from big to small, power failure influence value is the product of power failure duration and power failure load, for coming circuit above, is paid the utmost attention to Lines escalation is carried out to it；
Step 3.2：Secondly, the power failure influence value for causing to have a power failure to unqualified due to quality of voltage is counted side by side Sequence, its reactive capability for needing to compensate is calculated according to its voltage deviation, reactive compensation capacity limit value gives in advance, more than limit value Afterwards, then mend untill limit value；
Step 3.3：Again, fail-safe analysis is carried out to power distribution network, if reliability is still unsatisfactory for constraint requirements, to it Interconnection position of the switch optimization is carried out again, is established and more feasible is turned to improve the reliability of power distribution network, Zhi Daoke for passage During by sexual satisfaction constraint requirements, program results is exported；
Step 3.4：Calculate the net capability of program results scheme power distribution network.
Specific example：
As shown in figure 1, be a 42 node power distribution net examples, its interior joint 1,15,29 is power supply node, 9 times altogether 10kV feeder lines, interconnector have 5.Interconnector refers to the circuit where interconnection switch, i.e. dotted line in figure.
Line impedance, model in example；Transformer capacity, no-load voltage ratio；The load data of each node is shown in Table 3, table 4.
In calculating, population scale is set to 100, iterations 50, is taken as 0.9 after crossover probability, mutation probability It is taken as 0.1.The example is optimized according to the method for the invention to obtain result shown in table 2, altogether 15 schemes.By 15 scheme its power supply capacities that one-step optimization obtains all have increased, next, double optimizations are carried out to this 15 schemes, this Suboptimization is mainly lines escalation and installs reactive-load compensation additional, and sets the upper limit.After 2 suboptimization, the power supply of several schemes Ability gets a promotion again, and the reliability of power distribution network does not reduce, therefore meets constraint, without carrying out step 3.
The power supply capacity of network before table 1 optimizes
Initial load total value/MVA Net capability/MVA Transformer load equilibrium degree Reliability index
28.4028 37.1934 0.3499 99.7628
Result after 2 liang of step optimizations of table
Choice 10, its distribution net work structure are as shown in Figure 2.The interconnection switch between 6 and 11 nodes moves as seen from the figure To between 11 and 3 nodes, between the interconnection switch between 7 and 21 nodes has been moved to 21 and 19 nodes, and in 14 and 37 nodes Between newly-built circuit；Circuit between 36 and 37 nodes is changed to interconnector, has upgraded the circuit between node 1 and node 4. Power distribution network power supply capacity and reliability after being optimized according to the method for the invention are obtained for raising.
To sum up, this method is effective.Former network causes power supply bottleneck more, energy of powering because sharing of load is uneven Power is relatively low.By the optimization of this method, the heavy-haul line and the less circuit of line footpath in power distribution network are eliminated, eliminates power supply bottle Neck, therefore power supply capacity has obtained larger lifting, and reliability also makes moderate progress, it was demonstrated that of the invention good to be applicable Property.
It is attached：
Each transformer data of table 3
The initial load data of 4 each node of table
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention Art scheme is modified or equivalent substitution, and without departing from the objective and scope of the technical program, it all should cover in the present invention Right among.

Claims (4)

  1. A kind of 1. power distribution network short-term planning method based on net capability, it is characterised in that：Methods described includes following step Suddenly：
    Step 1) change line switching position come balanced circuit and transformer load rate：
    Step 1.1：Object function is established as power supply capacity is maximum, the load factor equilibrium degree of transformer is optimal and interconnection is apart from most Short plan model, constraints are transformer capacity constraint, capacity of trunk constraint and voltage constraint；
    Step 1.2：For above-mentioned model, the position of line switching is optimized using genetic algorithm, by heavy-haul line Sub-load is transferred on light-loaded circuit and run, and makes the load factor of circuit evenly；
    Step 2) pass through the power supply capacity of the upgrading raising power distribution network to existing equipment：
    Step 2.1：During power supply capacity is calculated, there is being unsatisfactory for the negative of the node of constraint and now these nodes in record Lotus growth ratio；
    Step 2.2：All nodes are ranked up from small to large according to load growth ratio；
    Step 2.3：For the different situations of above-mentioned node, different strategies is respectively adopted and carries out upgrading：
    Step 2.4：By Monte Carlo Analogue Method calculate current power distribution network reliability, and to power failure duration, power failure load, stop Electric position and safety at power cut are recorded, analyzed, for be unsatisfactory for requiring due to capacity of trunk and quality of voltage and caused by stop Electricity is marked, and stops planning if reliability constraint is met, exports programme, is otherwise transferred to step 3；
    Step 3) pass through lines escalation, installation reactive power compensator and interconnection optimization method lifting distribution network reliability：
    Step 3.1：First, to out-of-limit due to capacity of trunk and caused by have a power failure and carry out the sequence of power failure influence value, sequentially for from Arrive greatly small, power failure influence value is the product of power failure duration and power failure load, for coming circuit above, is paid the utmost attention to it Carry out lines escalation；
    Step 3.2：Secondly, the power failure influence value for causing to have a power failure to unqualified due to quality of voltage is counted and sorted, root Its reactive capability for needing to compensate is calculated according to its voltage deviation, reactive compensation capacity limit value gives in advance, after limit value, then Mend untill limit value；
    Step 3.3：Again, fail-safe analysis is carried out to power distribution network, if reliability is still unsatisfactory for constraint requirements, to it again Carry out interconnection position of the switch optimization, establish it is more it is feasible turn to improve the reliability of power distribution network for passage, until reliability When meeting constraint requirements, program results is exported；
    Step 3.4：Calculate the net capability of program results scheme power distribution network.
  2. A kind of 2. power distribution network short-term planning method based on net capability according to claim 1, it is characterised in that： In step 1.1, concrete model is：
    <mrow> <mi>M</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <mo>(</mo> <mrow> <msub> <mi>F</mi> <mi>i</mi> </msub> <mo>-</mo> <msub> <mi>F</mi> <mi>m</mi> </msub> </mrow> <mo>)</mo> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>
    <mrow> <mi>M</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>D</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>
    <mrow> <mi>M</mi> <mi>a</mi> <mi>x</mi> <mrow> <mo>(</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>m</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <msub> <mi>S</mi> <mi>m</mi> </msub> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow>
    <mrow> <msub> <mi>S</mi> <mi>m</mi> </msub> <mo>=</mo> <mi>max</mi> <mrow> <mo>(</mo> <munder> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>&amp;Element;</mo> <mi>m</mi> </mrow> </munder> <msub> <mi>S</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>4</mn> <mo>)</mo> </mrow> </mrow>
    <mrow> <munder> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>&amp;Element;</mo> <mi>m</mi> </mrow> </munder> <mrow> <mo>(</mo> <msub> <mi>S</mi> <mi>i</mi> </msub> <mo>+</mo> <msub> <mi>&amp;Delta;S</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> <mo>&amp;le;</mo> <msub> <mi>T</mi> <mi>m</mi> </msub> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>5</mn> <mo>)</mo> </mrow> </mrow>
    Si+ΔSi≤Ci (6)
    In formula, M represents the number of units of power distribution network transformer；FiRepresent the load factor of i-th transformer；FmRepresent current power distribution network change The Rate of average load of depressor；N represents newly-increased interconnection travel permit number；DiRepresent the length of i-th interconnector；SmRepresent m platforms The load of transformer institute band；SiWith Δ SiThe load and therefore caused network loss of i-th line road institute band are represented respectively；TmRepresent m The capacity of individual transformer；CiRepresent the capacity on i-th line road；UiRepresent the top voltage of i-th feeder line；uiRepresent i-th feeder line Terminal voltage；For power factor；RiAnd XiResistance and reactance for i-th line road；uhiFor the transverse direction pressure on i-th line road Drop；usiFor longitudinal pressure drop on i-th line road；UminAnd UmaxFor the lower and upper limit of voltage.
  3. 3. a kind of power distribution network short-term planning method based on net capability according to claim 1 or 2, its feature exist In：In the step 2.3), including situations below and it is corresponding processing strategy it is as follows：
    Situation I：Node for being unsatisfactory for transformer capacity constraint, it is right less than if 1.2 if load growth ratio of the institute with node Transformer carries out a liter appearance transformation, if growth ratio is more than 1.2, abandons transforming transformer institute band node set, sequentially transforms Come node thereafter；
    Situation II：Node for being unsatisfactory for circuit overload constraint, if the line footpath of circuit is smaller, causes circuit overload, then Upgrading is carried out to this circuit, increases the line footpath of circuit, the line cost for often upgrading 1km is designated as C；
    Situation III：Node for being unsatisfactory for node voltage constraint, if the voltage out-of-limit of the endpoint node of certain circuit, Install reactive power compensator or increase and decrease reactive compensation capacity on the circuit additional, often increase 1MVar reactive compensation capacities, by its cost It is designated as moC, moFor a cost conversion constant, it is no longer compensate for if reactive compensation capacity reaches limit value.
  4. 4. a kind of power distribution network short-term planning method based on net capability according to claim 3, its feature exist In：.To the single improvement cost of certain node more than noDuring C, then stop transforming the node, the node of order transformation below；If change The improvement cost sum of node set has been transformed during making more than noDuring C, then stop this transformation, noFor a constant, its is big It is small to be determined according to the estimated programmed cost of power distribution network.
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CN108616126A (en) * 2018-05-16 2018-10-02 广东电网有限责任公司 The Distribution Network Reliability computational methods of meter and power transmission network power supply capacity probability Equivalent Model
CN108805744A (en) * 2018-06-05 2018-11-13 国网江苏省电力有限公司南通供电分公司 Main feeder net capability analysis method based on minimal cut set algorithm
CN109193640A (en) * 2018-10-11 2019-01-11 国网湖北省电力有限公司电力科学研究院 A kind of distributed generation resource planing method improving distribution network voltage quality
CN109681381A (en) * 2018-12-24 2019-04-26 浙江大学 A kind of variable wind power plant load of utilization rate shares control method
CN109816247A (en) * 2019-01-26 2019-05-28 国网福建省电力有限公司 It is associated with the electric grid investment decision-making modeling method and device of modification measures and route heavy duty
CN109858799A (en) * 2019-01-26 2019-06-07 国网福建省电力有限公司 Active distribution network modification measures and route heavy duty rate relevance method for digging and device
CN111509699A (en) * 2020-04-02 2020-08-07 贵州电网有限责任公司 Voltage out-of-limit control decision method considering reactor consolidation
CN112583023A (en) * 2020-12-22 2021-03-30 广东电网有限责任公司 Power grid line structure
CN117764258A (en) * 2024-02-22 2024-03-26 广东电网有限责任公司广州供电局 Power supply path optimization method and device

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