CN109038568A - Voltage dip comprehensive processing method based on co-ordination of supply and demand - Google Patents
Voltage dip comprehensive processing method based on co-ordination of supply and demand Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses the voltage dip comprehensive processing methods based on co-ordination of supply and demand.This method comprehensively considers both sides of supply and demand cost of investment and user's damaed cordition, establishes transformation benefit goal function and comprehensive reformation Optimal Allocation Model using net present value method, is solved using Link-like Agent Genetic Algorithm.Simulation analysis is carried out in IEEE30 system, passes through the validity and superiority of proposed non-polluted tea of the contrast verification of user's loss before and after transformation.The unicity for compensating for resource allocation strategy in existing voltage dip improvement, not only improves custom power quality, also improves Power System Reliability and safety.
Description
Technical field
The present invention relates to electric power system faults to administer field, and in particular to a kind of voltage dip based on co-ordination of supply and demand is comprehensive
Administering method, it is comprehensive to improve custom power quality based on grid side transformation and two improvement visual angles of user side voltage compensation, with
And improve Power System Reliability and safety.
Background technique
Voltage dip improvement, which is mainly focused on, to be reduced the voltage dip generation frequency and controls its sequence severity.User is logical
The risk that production process is interrupted or production equipment is damaged is reduced frequently with voltage compensation unit or uninterruptible power supply；Power grid mainly leads to
Reduction line fault probability is crossed, the fault clearance time is reduced and changes power supply mode and administers voltage dip.
External existing voltage dip administering method: (Goswami A K, Gupta C P, Singh G K.Cost-
benefit analysis of voltage sag mitigation methods in chemical industry[C]//
International Conference on Electrical Engineering/electronics, Computer,
Telecommunications and Information Technology.2012:1-4.) it has evaluated various temporary drops inhibition and sets
Standby technical benefits and economic benefit is lost with utmostly reducing temporary decreasing loss；(Milanovic J V, Zhang Y.Global
Minimization of Financial Losses Due to Voltage Sags With FACTS Based Devices
[J] .Power Delivery IEEE Transactions on, 2010,25 (1): 298-306.) have evaluated user side voltage
Temporary decreasing loss is become estranged flexible AC transmitting system equipment cost, and most short with the investment payback time and net present value (NPV) is up to target, in conjunction with
Optimization algorithm solves the installation site of FACTS equipment, holds amount and type；(Jafari M, Naderi S B, Hagh M T, et
al.Voltage Sag Compensation of Point of Common Coupling(PCC)Using Fault
Current Limiter [J] .Power Delivery IEEE Transactions on, 011,26 (4): 2638-2646.)
It proposes to administer temporarily drop using a kind of new structural fault current limiter, and has studied its control method；Existing voltage dip is controlled
Reason strategy is concerned only with the resolution decision of user or power grid, and has ignored connecting each other for the two.
Domestic existing voltage dip administering method: (Li Dandan, Xiao Xianyong, Liu Yang wait (Li Dandan, Xiao
Xianyong, Liu Yang, et al) using process immunization time optimization protection voltage dip extenuate scheme (Voltage
sag mitigation scheme using protection optimization with process immunity
Time) [J] Electric Power Automation Equipment (Electric Power Automation Equipment), 2014,34 (9): 95-
100.) it proposes to alleviate voltage dip, the engineer application of this scheme using the cooperation of three-step charging and process immunization time
Value waits to prove；(Zhong Qing, Lin Lingxue, Yi Yang wait (Zhong Qing, Lin Lingxue, Yi Yang, et al) voltage
Temporarily evaluation index (I) drops --- electrical network weak link index (Evaluation Index of Voltage Sags I:
Unsubstantial Location Index) [J] Power System and its Automation journal (Proceedings of the
CSU-EPSA), 2012,24 (1): 110-114.) it proposes to consider the electrical network weak link evaluation index of temporary decline and the frequency,
Track remodelling priority is assessed, but it does not do further assessment to user's economic loss.
In fact, the purpose that voltage dip is administered is to reduce user's loss and evade to use risk.Voltage dip is controlled
Reason is related to the interests of both sides of supply and demand, and responsibility should need both sides' hand-in-glove by user and power grid shared.It is existing temporary
Drop resolution has cut off connecting each other for user and power grid, and investment decision has certain subjectivity and one-sidedness, causes to supply
Need both sides Rational choice control measures or abatement resource can not be wasted.
Summary of the invention
For the unicity for making up resource allocation strategy in existing voltage dip improvement, the present invention bases oneself upon grid side transformation and uses
Two improvement visual angles of family side voltage compensation, propose a kind of voltage dip comprehensive processing method based on co-ordination of supply and demand.Comprehensively consider
Both sides of supply and demand cost of investment and user's damaed cordition, the present invention establish transformation benefit goal function and synthesis using net present value method
Transformation and optimization allocation models, is solved using Link-like Agent Genetic Algorithm.Simulation analysis is carried out in IEEE30 system, by changing
Make the contrast verification of the front and back user loss validity and superiority of proposed non-polluted tea.
The present invention is achieved through the following technical solutions:
Voltage dip comprehensive processing method based on co-ordination of supply and demand, comprising the following steps:
Step 1: by being arranged successively after all transformation circuit numbers and the initialization of DVR offset voltage amplitude as intelligent body
In intelligent body endless-chain；
Step 2: calculating the transformation route and DVR offset voltage amplitude pair when former generation using comprehensive treatment objective function
Then the net present value (NPV) answered carries out the field tournament selection of intelligent body；The comprehensive treatment objective function are as follows:
In formula, NPV is net present value (NPV)；N is the project cycle；M is sensitive users number；N is current period；U is that DVR purchases platform
Number；Closs(i) the loss reduced value of the user i after comprehensive treatment is indicated；CDVR(j) acquisition cost for being jth platform DVR；Table
Show DVR and be transformed line cord year operation expense summation；R is discount rate；It is C that DVR, which replaces cost,R；ClIt (k) is line
The improvement cost of road k；
Step 3: by field compete in winning individual carry out adaptive intersection, mutation operation；
Step 4: it is the smallest to replace this generation harness effect with the improvement combination in previous generation population with maximum harness effect
Defect individual replacement is realized in combination；
Step 5: repeat step 2-step 4, until search when harness effect maximum corresponding optimal transformation route with
Optimal DVR compensation capacity, to obtain comprehensive treatment scheme.
Specifically, the acquisition cost of the jth platform DVR indicates are as follows:
CDVR(j)=SDVR(j)Cdunit,
In formula, SDVRIt (j) is jth platform DVR compensation capacity；CdunitFor the market price of DVR unit capacity；
Wherein, DVR compensation capacity SDVRIt is related to the offset voltage amplitude that load capacity and DVR export:
In formula, SloadFor rated voltage with load；U is user's voltage rating；UDVRFor the offset voltage amplitude of DVR output.
Specifically, the loss reduced value of user i consists of two parts after the comprehensive treatment, a part is user through DVR
Because production disruption number reduces avoided loss after compensation；Another part is that system weakness track remodelling reduces temporary frequency reducing time
Reduction loss, under the two collective effect user lose reduced value are as follows:
Closs(i)=Δ Nco(i)Csag(i),
In formula, Δ Nco(i) voltage dip to cause user i to lose after comprehensive treatment reduces number；CsagIt (i) is user i
Single voltage dip expected shortfall.
Specifically, the improvement cost C of the route kl(k) it indicates are as follows:
C1(k)=Clunit(k) L (k),
In formula, Clunit(k) enter ground cost apart from overhead line for unit；L (k) is the length of route k.
Specifically, setting area coordinate (1, i0) intelligent body bePop indicates population at individual
Number,Field be expressed asWherein:
T is current algebra.
The present invention has the advantage that and the utility model has the advantages that
Comprehensive processing method of the invention has given full play to the large area radiation effects of grid side improvement and user side is administered
High efficiency, achieved the purpose that co-ordination of supply and demand, for voltage dip improvement provide a kind of new approaches；It temporarily drops and controls in virtual voltage
In reason method, cost of investment and situation of Profit should be weighed, flexibly using the administration way to link work at selected spots with that in entire areas, i.e., user side is point-to-point controls
Reason and the improvement of grid side spreadability combine.
The harm of voltage dip is not only in that the influence to user benefit, also resides in it to power system security reliability service
Threat, therefore, the benefit of electric network reconstruction not only includes the improvement to custom power quality, also comprising to Power System Reliability
With the contribution of safety；And comprehensive processing method of the invention comprehensively considers grid side transformation immediately and user side is administered, it can be big
It is big to improve custom power quality, while improving the reliability and safety of electric system.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is comprehensive processing method flow chart of the invention.
Fig. 2 is typical industry sensitive users voltage-tolerance curve of the invention.
Fig. 3 is IEEE30 system wiring figure of the invention.
Fig. 4 is each DVR optimal compensation amplitude of the invention.
Fig. 5 is comprehensive treatment objective function iteration diagram of the invention.
Fig. 6 is that comparison diagram is lost in 14 node users transformation front and back of the invention.
Fig. 7 is that comparison diagram is lost in 10 node users transformation front and back of the invention.
Fig. 8 is that comparison diagram is lost in 30 node users transformation front and back of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
Sensitive users loss is estimated
The treatment cost that the formulation of voltage dip Management strategy should pay close attention to user's loss simultaneously and temporarily drop.It is temporary for assessment voltage
Dropping the economic loss caused by sensitive users must be temporary to sensitive load busbar voltage in the case where measured data is difficult to obtain
Drop carries out Stochastic prediction.Monte Carlo Method is usually used in solving the stochastic problems of electric system, using Monte Carlo Method to power grid
Failure carries out Stochastic prediction, chooses fault type, abort situation and trouble duration as stochastic variable, and ignores failure resistance
Anti- size.
Fault type
Frequency P (the FT that all types of failures occurt) can be indicated by formula (1):
In formula: Pfs(s=1,2,3,4) it is short that the annual single phase ground fault of 100km route, two phase ground are respectively indicated
Road, line to line fault and three phase short circuit fault number.
Abort situation
10 fault points are uniformly arranged on every route, if the probability that any position is broken down on same route is equal,
Then abort situation u can be indicated with [0,1] equally distributed random number is obeyed.
Trouble duration
Temporarily the drop duration is equal to the main protection fault clearance time for present invention setting, and main protection absolutely acts, then
Trouble duration obedience is desired for 0.06s, and standard deviation is the normal distribution of 0.01s.
User's susceptibility
User's susceptibility is portrayed by the voltage-tolerance curve that voltage magnitude and time form, and is to judge whether temporary drop event is right
The foundation that user causes damages.
Loss expectation temporarily drops in user's single
User's single temporarily drops loss expectation reflecting voltage and temporarily drops the average level to cause damages to sensitive users.
Each sensitive users can be obtained using Monte Carlo Method simulated fault information, and in conjunction with voltage dip Analytic Calculation Method
The voltage dip amplitude of place node.It is resistant to by comparing node voltage amplitude, trouble duration and sensitive users voltage bent
Line is whether the temporary drop that can determine whether that failure causes causes user to lose.
Stochastic prediction result features electric network fault damaed cordition caused by sensitive users, random due to electric network fault
Property, randomness can be also presented in the Stochastic prediction result of user's loss in a certain range.
The voltage dip comprehensive processing method based on co-ordination of supply and demand of the present embodiment:
Grid side is administered
Since short trouble most of in electric system is used due to caused by bad weather or other external factor
Buried cable replaces overhead line that can greatly reduce line fault probability.According to engineering experience, overhead line enters this route event behind ground
Barrier probability becomes original 1/10, it may be assumed that
E'f(k)=Ef(k)/10 (2)
In formula: E'f(k) and Ef(k) the year probability of malfunction before and after kth track remodelling is respectively indicated.
Transformation overhead line enters shown in ground cost of investment such as formula (3), and the operation expense of cable is track remodelling cost
10%.
C1(k)=C1unit(k)L(k) (3)
In formula: C1unit(k) enter ground cost apart from overhead line for unit；L (k) is the length of route k.
User side is administered
Dynamic electric voltage recovery device can compensate user's voltage in several milliseconds, be common short time voltage compensating for variations equipment,
The present embodiment is to the improvement of user side by the way of configuring DVR (Dynamic Voltage Regulator).
DVR cost of investment includes DVR acquisition cost and operation expense.The acquisition cost of jth platform DVR may be expressed as:
CDVR(j)=SDVR(j)Cdunit (4)
In formula: SDVR(j) capacity for being jth platform DVR；CdunitFor the market price of DVR unit capacity.
The year operation expense of DVR is the 5% of its acquisition cost.DVR compensation capacity SDVRIt is defeated with load capacity and DVR
Voltage magnitude is related out:
In formula: SloadFor rated voltage with load；U is user's voltage rating；UDVRFor the offset voltage amplitude of DVR output.
The resource distribution of co-ordination of supply and demand is planned
Voltage dip, which is administered, to be needed to stand at global visual angle, carries out unified planning to both sides of supply and demand resource distribution.The present embodiment
It is proposed the voltage dip comprehensive processing method based on co-ordination of supply and demand, the i.e. capacity configuration of coordinates user side DVR and grid side transformation
The selection of route.
Grid side improvement can reduce the voltage dip frequency, and then reduce the economic loss of sensitive users, drop when user loses
Down to user can tolerance range when, the DVR that more low capacity may be selected in user copes with potential low frequency time temporarily drop event；DVR then may be used
It is effectively improved the loss situation of user, reduces the transformation priority of power grid weakness route or necessity, thus by influencing to change
The selection of route is made to influence grid side treatment cost.From the point of view of resource distribution reasonability, DVR compensation capacity and transformation line
The selection on road influences each other, complements one another, it is therefore necessary to using maximize both sides of supply and demand benefit as target to the configuration of the two into
Row collaborative planning.
Comprehensive treatment income quantitative model
The compensation capacity of DVR and route to be rebuilt are set as variable by non-polluted tea, and the most optimum distribution of resources of supply and demand side is asked
Topic becomes multivariable collaboration optimization problem.Known by formula (4), DVR cost is the product of compensation capacity and unit capacity price, by formula
(5) know, DVR capacity is determined by compensation amplitude and user capacity, and setting user capacity is invariable, then compensating amplitude can be directly anti-
Reflect DVR cost of investment.Since DVR average life span is 15 years, power cable average life span is 30 years, to make the cross between modification scheme
It is relatively sharp intuitive to comparing, period of supervision is uniformly set as 30 years.Comprehensive treatment earnings target letter is established using net present value method
Number:
In formula: NPV is net present value (NPV)；N is the project cycle；M is sensitive users number；N is current period；U is that DVR purchases platform
Number；Closs(i) the loss reduced value of the user i after comprehensive treatment is indicated；CDVR(j) acquisition cost for being jth platform DVR；Table
Show DVR and be transformed line cord year operation expense summation；R is discount rate, generally takes 8%；Since cable run is raw
The life period is longer than DVR, needs to be DVR primary replacement in the project cycle, and displacement cost is CR；Cl(k) being transformed into for route k
This.
The loss reduced value of user i consists of two parts after comprehensive reformation scheme is administered, and a part is that user compensates through DVR
Afterwards because production disruption number reduces avoided loss, another part subtracts temporary frequency reducing time reduction by system weakness track remodelling
Few loss, user loses reduced value under the two collective effect are as follows:
Closs(i)=Δ Nco(i)Csag(i) (7)
In formula: Δ Nco(i) voltage dip for causing user i to lose after administering for integration scenario reduces number；Csag(i) it is
User's i single voltage dip expected shortfall.
The present embodiment solves DVR capacity configuration and transformation routing problems using Link-like Agent Genetic Algorithm.The calculation
Method introduces neighborhood competition mechanism on the basis of traditional genetic algorithm, increases population diversity, improves constringency performance.It will
Pop intelligent body forms endless-chain, and each intelligent body can only carry out parent selection with adjacent intelligent body, intersect and variation, finally
Achieve the purpose that global optimization.The voltage dip comprehensive processing method process based on co-ordination of supply and demand of the present embodiment as shown in Figure 1,
The following steps are included:
S01 will be arranged successively as intelligent body in intelligent body endless-chain after circuit number and DVR compensation amplitude initialization
In.
S02 is calculated using non-polluted tea objective function when transformation route and DVR the compensation amplitude of former generation are corresponding
Then net present value (NPV) carries out the neighborhood tournament selection of intelligent body.
If area coordinate (1, i0) intelligent body bePop indicates population at individual number,Field be expressed asWherein: t is current algebra；
S03, by neighborhood compete in winning a c body carry out adaptive intersection, mutation operation..
S04 is transformed the smallest group of benefit with having the transformation combination of maximum transformation benefit to replace this generation in previous generation population
It closes, realizes defect individual replacement.
S05, repeat the above steps S02-S04, until when searching transformation benefit maximum corresponding optimal transformation route with
Optimal DVR compensation capacity, to obtain comprehensive treatment scheme.
Embodiment 2
The present embodiment 2 is the concrete application of the voltage dip administering method based on co-ordination of supply and demand of embodiment 1, with IEEE30
Simulation analysis is carried out for node system, the system include two voltage class routes of 132kV and 33kV, have 6 generating sets,
30 buses, 37 routes and 4 transformers, it is assumed that all transformers are all made of the Y0/Y0 mode of connection.IEEE30 system is not
The probability of happening of same type failure, as shown in table 1.
1 IEEE30 system line failure rate of table
For research sensitive users loss, data are lost to the temporary decreasing loss of typical industry user's single to industrial user's voltage dip
It loses desired value and load capacity is made as follows it is assumed that as shown in table 2.Using the voltage-tolerance curve of typical industry sensitive users,
As shown in Figure 2.
The temporary decreasing loss of 2 typical industry user's single of table loses and load capacity
| Number | Industry | Single voltage dip loss expectation/ten thousand yuan | Load capacity/kVA |
| 1 | Semiconductor | 20.00 | 2000 |
| 2 | Steel-making | 1.00 | 2000 |
| 3 | Automobile manufacture | 5.00 | 2000 |
| 4 | Pharmacy | 0.50 | 1000 |
Assuming that having 4 users under 14,10,30 nodes, respectively for without loss of generality, user's random combine in table 2 is followed by
To above-mentioned node, as shown in Fig. 2, and analyzed by taking a wherein combined result as an example, as shown in table 3.
3 user's combined result of table
| Node | Combination | Single loses/ten thousand yuan | Capacity/kVA |
| 14 | (1,2,3,3) | 31.00 | 8000 |
| 10 | (1,1,2,4) | 41.50 | 7000 |
| 30 | (1,2,4,4) | 22.00 | 6000 |
The power cable cost data of the present embodiment come from " State Grid Corporation of China's project of transmitting and converting electricity General Engineering Cost ", wherein
It is YJV22-26/35kV-3*150mm2 that 35kV grade, which selects cable model, and cost (include: purchase by cable expense, auxiliary facility
Take, installing engineering expense etc.) for 56.99 ten thousand yuan/km, it is YJLW03-64/110kV-1* that 110kV grade, which selects cable model,
400mm2, cost (ibid) are 251.83 ten thousand yuan/km.
Domestic more DVR manufacturers, the market price for having obtained current DVR are as shown in table 4 by inquiry for the present embodiment.
The market price of 4 DVR of table
| Voltage class/kV | Compensation capacity/kVA | Offset voltage (p.u.) | Price/(first kVA-1) |
| 400 | ≤4000 | 0-0.5 | 2000-3000 |
The compensation capacity of route and three DVR are 4 independent variables in comprehensive reformation strategy, anti-respectively in objective function
It reflects for electric grid investment and customer investment.Under the booster action of electric network reconstruction, the compensation amplitude of DVR is as shown in Figure 4.
Optimized algorithm, which can be calculated grid side, need to be transformed route 14, i.e. branch 9-10, and 14,10,30 pairs of user's side gusset
It is 0.14,0.28,0.05 that the DVR compensation amplitude answered converges on respectively, obtains what 14,10,30 nodes need to configure finally by formula (5)
DVR capacity.Therefore comprehensive reformation scheme are as follows: route 14 is transformed in grid side, and improvement cost is 1052.00 ten thousand yuan；User side 14,
10, the DVR that capacity is 1120,1960,300kVA is respectively configured in 30 nodes, and improvement cost is respectively 336.00 ten thousand yuan, 588.00
Wan Yuan, 90.00 ten thousand yuan.Comprehensive reformation scheme target function value converges on 12359.00 ten thousand yuan, Optimized Iterative process such as Fig. 5 institute
Show.
Fig. 6-8 is that each route in the front and back user configuration DVR of three nodes loses comparison caused by each node users.By scheming
6-8 has different degrees of reduction it is found that implementing each line fault after non-polluted tea and losing caused by each node users.Allusion quotation
Type is such as: 10 user of node, and the DVR that the transformation cooperation node 10 of route 14 configures causes 14 failure of route to 10 user of node
Loss drop to 0.46 ten thousand yuan by original 117.85 ten thousand yuan.
Summation will be lost caused by each route, voltage dip damaed cordition caused by each node users can be obtained, such as table 7
It is shown.
Each node users loss comparison before and after 7 comprehensive treatment of table
| User node | / ten thousand yuan of the year before last loss of transformation | The year after next is transformed and loses/ten thousand yuan | The range of decrease/% |
| 14 | 254.72 | 20.38 | 92.00 |
| 10 | 485.20 | 45.53 | 90.62 |
| 30 | 48.89 | 18.3 | 62.57 |
| It amounts to | 788.81 | 84.21 | 89.32 |
Centralized compensation is carried out to sensitive users using DVR, the use risk of user, but point-to-point use can be effectively reduced
Family compensates the other sensitive users that can not cover power grid.From the point of view of resource consolidation, electric network reconstruction can reduce temporarily drop from source
The frequency, and there is certain radiation effect, it can sufficiently make up the deficiency of user's improvement.It is noted that the present invention only chooses
Three bus nodes are administered, and sensitive users are more in actual electric network, and load condition is increasingly complex, and resource is reasonable
The importance of configuration is more prominent.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. the voltage dip comprehensive processing method based on co-ordination of supply and demand, which comprises the following steps:
Step 1: by being arranged successively as intelligent body in intelligence after all transformation circuit numbers and the initialization of DVR offset voltage amplitude
In energy body circulation chain；
Step 2: being calculated using comprehensive treatment objective function when the transformation route and DVR offset voltage amplitude of former generation are corresponding
Then net present value (NPV) carries out the field tournament selection of intelligent body；The comprehensive treatment objective function are as follows:
In formula, NPV is net present value (NPV)；N is the project cycle；M is sensitive users number；N is current period；U is that DVR purchases number of units；Closs
(i) the loss reduced value of the user i after comprehensive treatment is indicated；CDVR(j) acquisition cost for being jth platform DVR；Indicate DVR and
Be transformed line cord year operation expense summation；R is discount rate；It is C that DVR, which replaces cost,R；Cl(k) changing for route k
Cause this；
Step 3: by field compete in winning individual carry out adaptive intersection, mutation operation；
Step 4: with improvement combination the smallest group of this generation harness effect of replacement in previous generation population with maximum harness effect
It closes, realizes defect individual replacement；
Step 5: repeat step 2-step 4, until searching when harness effect maximum corresponding optimal transformation route and optimal
DVR compensation capacity, to obtain comprehensive treatment scheme.
2. the voltage dip comprehensive processing method according to claim 1 based on co-ordination of supply and demand, which is characterized in that described
The acquisition cost of j platform DVR indicates are as follows:
CDVR(j)=SDVR(j)Cdunit,
In formula, SDVRIt (j) is jth platform DVR compensation capacity；CdunitFor the market price of DVR unit capacity；
Wherein, DVR compensation capacity SDVRIt is related to the offset voltage amplitude that load capacity and DVR export:
In formula, SloadFor rated voltage with load；U is user's voltage rating；UDVRFor the offset voltage amplitude of DVR output.
3. the voltage dip comprehensive processing method according to claim 1 based on co-ordination of supply and demand, which is characterized in that described comprehensive
The loss reduced value for closing user i after administering consists of two parts, and a part is for user because production disruption number subtracts after DVR is compensated
Few avoided loss；Another part by system weakness track remodelling reduce temporary frequency reducing time reduction loss, it is total in the two
User loses reduced value under same-action are as follows:
Closs(i)=Δ Nco(i)Csag(i),
In formula, Δ Nco(i) voltage dip to cause user i to lose after comprehensive treatment reduces number；CsagIt (i) is user i single
Voltage dip expected shortfall.
4. the voltage dip comprehensive processing method according to claim 1 based on co-ordination of supply and demand, which is characterized in that the line
The improvement cost C of road kl(k) it indicates are as follows:
C1(k)=C1unit(k) L (k),
In formula, C1unit(k) enter ground cost apart from overhead line for unit；L (k) is the length of route k.
5. the voltage dip comprehensive processing method according to claim 1 based on co-ordination of supply and demand, which is characterized in that set region
Coordinate (1, i0) intelligent body bePop indicates population at individual number,Field be expressed asWherein:
T is current algebra.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109950910A (en) * | 2019-04-23 | 2019-06-28 | 福州大学 | A kind of voltage dip of Kernel-based methods parameter immunization time extenuates method |
| CN110707685A (en) * | 2019-09-06 | 2020-01-17 | 国网福建省电力有限公司 | Optimization method for power quality energy-saving efficiency-increasing scheme of power distribution network |
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| CN112907029A (en) * | 2021-01-20 | 2021-06-04 | 国家电网有限公司 | Optimal selection method for voltage sag control scheme of sensitive user |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950910A (en) * | 2019-04-23 | 2019-06-28 | 福州大学 | A kind of voltage dip of Kernel-based methods parameter immunization time extenuates method |
| CN109950910B (en) * | 2019-04-23 | 2022-06-17 | 福州大学 | Voltage sag reduction method based on process parameter immune time |
| CN110707685B (en) * | 2019-09-06 | 2021-09-24 | 国网福建省电力有限公司 | Optimization method for power quality energy-saving efficiency-increasing scheme of power distribution network |
| CN110707685A (en) * | 2019-09-06 | 2020-01-17 | 国网福建省电力有限公司 | Optimization method for power quality energy-saving efficiency-increasing scheme of power distribution network |
| CN111404166A (en) * | 2019-10-28 | 2020-07-10 | 众诚开源电气科技(成都)有限公司 | Voltage sag comprehensive control method |
| CN111507863A (en) * | 2020-04-20 | 2020-08-07 | 国网江苏省电力有限公司徐州供电分公司 | Capacity design method of cross power supply high-capacity dynamic voltage recovery system based on genetic algorithm |
| CN112907029A (en) * | 2021-01-20 | 2021-06-04 | 国家电网有限公司 | Optimal selection method for voltage sag control scheme of sensitive user |
| CN112907029B (en) * | 2021-01-20 | 2024-05-31 | 国家电网有限公司 | Optimization method of sensitive user voltage sag treatment scheme |
| CN113363975A (en) * | 2021-06-18 | 2021-09-07 | 国网四川省电力公司技能培训中心 | Shared voltage sag compensation system and method considering process immunity time |
| CN113497448A (en) * | 2021-07-27 | 2021-10-12 | 国网湖南省电力有限公司 | Sensitive enterprise voltage sag control method and device considering comprehensive benefits |
| CN113497448B (en) * | 2021-07-27 | 2022-06-10 | 国网湖南省电力有限公司 | Sensitive enterprise voltage sag control method and device considering comprehensive benefits |
| CN116154783A (en) * | 2022-09-09 | 2023-05-23 | 国网宁夏电力有限公司中卫供电公司 | Smelting enterprise-oriented voltage sag treatment method, medium and system |
| CN116154783B (en) * | 2022-09-09 | 2024-03-19 | 国网宁夏电力有限公司中卫供电公司 | Smelting enterprise-oriented voltage sag treatment method, medium and system |
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