CN108280539A - The drops such as the reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation damage optimization method - Google Patents
The drops such as the reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation damage optimization method Download PDFInfo
- Publication number
- CN108280539A CN108280539A CN201810019375.0A CN201810019375A CN108280539A CN 108280539 A CN108280539 A CN 108280539A CN 201810019375 A CN201810019375 A CN 201810019375A CN 108280539 A CN108280539 A CN 108280539A
- Authority
- CN
- China
- Prior art keywords
- node
- loss
- reactive
- power
- taiwan area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000005457 optimization Methods 0.000 title claims abstract description 43
- 238000004364 calculation method Methods 0.000 title claims abstract description 39
- 230000005611 electricity Effects 0.000 claims abstract description 33
- 238000009826 distribution Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000013459 approach Methods 0.000 claims abstract description 7
- 238000009412 basement excavation Methods 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 15
- 230000008901 benefit Effects 0.000 claims description 13
- 230000035945 sensitivity Effects 0.000 claims description 12
- 230000009466 transformation Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 10
- 238000004422 calculation algorithm Methods 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000010206 sensitivity analysis Methods 0.000 claims description 6
- 230000001131 transforming effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 210000000349 chromosome Anatomy 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 claims description 3
- 238000000556 factor analysis Methods 0.000 claims description 3
- 230000002068 genetic effect Effects 0.000 claims description 3
- 230000005283 ground state Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000013178 mathematical model Methods 0.000 claims description 3
- 238000000819 phase cycle Methods 0.000 claims description 3
- 238000013439 planning Methods 0.000 claims description 3
- 238000012913 prioritisation Methods 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 230000009469 supplementation Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000011426 transformation method Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000007726 management method Methods 0.000 description 5
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
The invention belongs to transmission ＆ distribution electro-technical fields, and optimization method is damaged more particularly, to drops such as a kind of reactive-load compensations based on rural power grids typical case's taiwan area line loss calculation.Including：The topological structure for analyzing network is prepared for accurate line loss calculation；According to the data cleansing and excavation of the physical parameters such as the different characteristics of rural power grids typical case's taiwan area and radius of electricity supply, typicalness classification is carried out to rural power grids taiwan area；Using the improved loss for being pushed forward trend method and calculating rural power grids taiwan area；It establishes the object function of idle work optimization and adds voltage, power factor, compensation capacity, the constraints for compensating equipment；Determine the compensation position of the reactive-load compensation of different type typical case's taiwan area and the capacity that each compensation equipment should compensate；Establish the rural power grids taiwan area of more reducing loss measure combinations；Establish the reactive compensation capacity of decomposition-coordination approach.The present invention can be that accurate line loss calculation is prepared；According to physical parameters data cleansing and excavations such as the different characteristics of rural power grids typical case's taiwan area and radius of electricity supplys；So that the line loss result calculated is more accurate.
Description
Technical field
The invention belongs to transmission ＆ distribution electro-technical field, more particularly, to a kind of based on rural power grids typical case's taiwan area line loss calculation
The drops such as reactive-load compensation damage optimization method.
Background technology
In recent years, China's economy develops rapidly, and power industry is also developed faster therewith, and China's machine-building is horizontal
Also it achieves compared with much progress, first and second electrical equipment manufacturing technology of power grid also obtains surprising progress.By the electricity of national several years
Net upgrading, power grid equipment, technical performance acquirement are greatly improved.For many years, for the Controlling line loss of Utilities Electric Co.,
The especially Controlling line loss of rural area distribution is always the difficult point and emphasis of Controlling line loss.The related statistics table of many access
Bright, in each voltage class power grid in China, the electric quantity loss of 10KV and following distribution has accounted for the proportion of whole distract electric quantity loss
About 49%, how power supply enterprise well reduces the electric energy loss of power distribution network, is the long-term mesh of management in power supply enterprise work
Mark and focus.
Each power supply enterprise is using the statistics of line loss, analysis and management as the day-to-day operations sex work of enterprise.Management and control is each
Class electric energy and line losses indices are the main means of line loss statistical work, carry out line loss statistics, analysis, management work, find analysis
The various correlative factors that can influence line loss per unit variation, related conclusions, adaptation to local conditions, for actual conditions are obtained by line loss analyzing
Relevant reducing loss measure is formulated, the management in power supply enterprise person where power distribution network is allowed really to make reality in administered operation of power networks clear
Power levels are lost.With Electric network energy loss theoretical calculation and analysis for handgrip, determines the variable loss of power transmission network and power distribution network and consolidate
Setting loss loss-rate calculates, analysis, grasps line loss changing rule, comparison theory wire loss value and practical line loss value, comparison ring than data with
Year-on-year data compare similar circuit, to find the cause for influencing line loss variation；Generally going through line loss theoretical calculation can be clear
Determine technical loss and manage line loss ratio, for formulate drop damage index measure and performance assessment criteria measure lay a solid foundation.Cause
This, can effectively verify whether current Distributing network structure is reasonable, and carry for the transformation of distribution by line loss theoretical calculation and analysis
For correlation theory foundation.
Applicants have found that reactive-load compensation can accomplish that idle in-situ balancing, reduction is made to convey from mains side idle
Electric power；And compensation benefit convenient for installation and maintenance, at low cost it is good the advantages that.Reactive-load compensation has the same of compensating power effect
When also have the function of adjust voltage.Reactive-load compensation drop damage on the basis of plus improve three-phase imbalance, replace transformer,
Replacing the reducing loss measures such as circuit section product can make line loss be reduced to ideal result.
Therefore, the proposition of the drops such as a kind of reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation damage optimization method, has
Certain theoretical foundation and realistic meaning.
Invention content
The present invention for the above-mentioned prior art the problem of, provide and a kind of being based on rural power grids typical case's taiwan area line loss calculation
The drops such as reactive-load compensation damage optimization method.The purpose is to prepare for more accurate line loss calculation, agriculture is more accurately calculated
The loss of net platform region.
In order to achieve the above-mentioned object of the invention, the present invention is achieved by the following technical solutions：
The drops such as the reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation damage optimization method, include the following steps：
Step 1：The topological structure for analyzing network is accurate using dividing gradient search procedure to obtain accurate physical parameter
Line loss calculation is prepared；According to the different characteristics of rural power grids typical case's taiwan area and radius of electricity supply, transformer model capacity service life, bear
The data cleansing and excavation of the physical parameters such as lotus distribution situation carry out typicalness classification to rural power grids taiwan area；
Step 2：Using the improved loss for being pushed forward trend method and calculating rural power grids taiwan area；
Step 3：It establishes the object function of idle work optimization and adds voltage, power factor, compensation capacity, the pact for compensating equipment
Beam condition；
Step 4：It determines the compensation position of the reactive-load compensation of different type typical case's taiwan area and each compensates what equipment should compensate
Capacity；
Step 5：Establish the rural power grids taiwan area of more reducing loss measure combinations；
Step 6：Establish the reactive compensation capacity of decomposition-coordination approach.
The step 1 includes：According to the network structure of distribution network system and switch operating status, to the load of power distribution network into
Row classification, according to different loads and whether there is or not measuring values to carry out a point gradient search, to obtain the parameter and section of each branch of system
Voltage, active power and the reactive power of point；
The active and reactive power and voltage value of main transformer, distribution transforming in first gradient search distribution feeder；
Transformer for failing to obtain real-time measurement carries out the second gradient search, and complete and precision satisfaction is wanted in order to obtain
The operating parameter asked, the use state estimation technique carry out line loss calculation；
In the quantity for having searched for transformer, 3rd gradient search is carried out, is searched on user and overhead transmission line, cable run
Each node forms node matrix equation.
Described in the step 2 it is improved be pushed forward trend method refer to taken as measurement to node voltage value and calculating obtained by
As a result average value makes the voltage value of each node more accurate, and the line loss value of calculating is truer；
The step 2 includes：By obtaining the measured data of each end load node, each section is calculated by prospective method
The voltage value and performance number of the corresponding last node of point, if as soon as upper node uses without measured value and calculate forward calculation institute
The voltage value obtained takes the average value of measured value and calculated value if any measured value；If a upper node corresponds to two load bus,
If this node takes two loads to be pushed forward the average value of voltage without measured value, the average value of three's value is otherwise taken, and so on；Directly
To root node；The result of line loss is equal to the total losses that transformer calculates and adds the total losses calculated on circuit；
Aloss=Tloss+Lloss
A in above formulalossFor all line loss, TlossFor the loss of transformer, LlossFor the loss of transmission line of electricity；
Step 21：Known to line impedance parameter, as long as measuring active and reactive, the voltage of load bus
Virtual value, so that it may accurately to find out very much loss between load bus and its superior node on circuit and superior node
Voltage, and calculating line loss and node voltage all avoid plural multiplication and division；Circuit l between node 2 to 32-3It is per phase of impedance
Z2-3=R2-3+jX2-3The three-phase output power for measuring node 3 simultaneously is P3+jQ3, line voltage virtual value is U3；
Circuit l2-3On active power loss be：
In above formula, Δ P2-3Refer to circuit l2-3On active loss；P3It is the active power of node 3, Q3It is node 3
Reactive power；U3It is the voltage of node 3, R2-3It is circuit l2-3On resistance value；
Reactive power loss is：
In above formula, Δ Q2-3Refer to circuit l2-3On active loss；P3It is the active power of node 3, Q3It is node 3
Reactive power；U3It is the voltage of node 3, R2-3It is circuit l2-3On resistance value；
The output power of node 2 is：
S2=(P3+ΔP2-3)+j(Q3+ΔQ2-3)
In above formula, S2Refer to the output power of node 2；P3It is the active power of node 3, Q3It is the idle work(of node 3
Rate；ΔP2-3、ΔQ2-3It is circuit l respectively2-3The active power and reactive power of upper loss；
The voltage effective value U of node 22For：
In above formula, U2Refer to the RMS voltage Δ U of node 22-3、δU2-3It is circuit l2-3The vertical component of voltage landing and
Horizontal component；
Step 22：Assuming that a certain taiwan area, which shares 11 nodes, it is known that resistance, reactance between each node, and
And the active power, reactive power, voltage effective value of each load bus are had been obtained for by data collecting system；
Steps are as follows for the specific implementation of algorithm：
(1) node-classification is carried out first and is numbered, and power supply node, load bus are distinguished；Power supply node is 0 node, load
Node is 2,3,8,9,10 nodes；
(2) by obtaining the measured data of each end load node, by prospective method calculate each node it is corresponding on
The voltage value and performance number of a node, if as soon as upper node uses the voltage value calculated obtained by forward calculation without measured value,
If any measured value, the average value of measured value and calculated value is taken；If a upper node corresponds to two load bus, if this node without
Measured value, takes two loads to be pushed forward the average value of voltage, otherwise takes the average value of three's value, and so on；Until power supply node；
Circuit between node 8 and 6 is l8-6Each impedance between circuit is Z8-6=R8-6+jX8-6The load 8 measured saves
Three output powers of point are P8+jQ8Then circuit l8-6Between active power loss：
In above formula, Δ P8-6It is circuit l8-6Active power loss, P8It is the active power of node 8, Q8Node 8 it is idle
Power, U8It is the voltage effective value of node 8, R8-6It is circuit l8-6Between impedance；
Reactive power loss is：
In above formula, Δ Q8-6It is circuit l8-6Reactive power loss, P8It is the active power of node 8, Q8Node 8 it is idle
Power, U8It is the voltage effective value of node 8, X8-6It is circuit l8-6Between reactance；
The output power of node 6 is：
S6=P6+jQ6=(P8+ΔP8-6)+j(Q8+ΔQ8-6)
In above formula, S6Refer to the output power of node 6；P6It is the active power of node 6, Q6It is the idle work(of node 6
Rate；ΔP8-6、ΔQ8-6It is circuit l respectively8-6The active power and reactive power of upper loss；P8、Q8It is the wattful power of node 8 respectively
Rate and reactive power；
The voltage value of node 6 is：
In above formula, U8For the voltage effective value of node 8, Δ U8-6For circuit l8-6The vertical component of voltage landing, δ U8-6For line
Road l8-6The horizontal component of voltage landing；
Wherein：
Circuit l can similarly be passed through9-6The voltage and output power for calculating node 6, if the voltage of node 6 can be measured
Value obtains the voltage value and performance number of node 6 with output power by calculating the average value of three, if the node 6 that do not survey
The voltage value of voltage value and performance number, node 6 takes the average value of calculating, performance number also to take the average value of calculating；
(3) circuit having had been calculated is marked, continue search for the circuit of non-marked until all circuits all
It calculates；
(4) it calculates the loss of all common transformers, when calculating, the node load of actual measurement, voltage value is utilized to calculate transformation
The copper loss and iron loss of device；So, transformer loss calculates the influence for just having fully taken into account load, voltage；
(5) total line loss：
Aloss=Tloss+Lloss
Wherein AlossFor all line loss, TlossFor the loss of transformer, LlossFor the loss of transmission line of electricity.
Object function described in the step 3：
min(P1-P2)
Wherein P1 is investment cost, and P2 is drop damage income, and object function is the minimum value of two differences；
Wherein：
In above formula, n is that node compensates equipment sum；NiFor the packet count of the compensation capacitor of the i-th complete equipment；Ci is compensation
The capacity of the corresponding single group capacitor of equipment；Ma is the unit price of compensation capacity；Mb is the single group price for compensating equipment；Mc is
Expense input by equipment is installed；
Wherein：
P2=(f1-f2)·c·T
In above formula, f1For the power loss before compensation, f2For the power loss after compensation, c is corresponding electricity price, T operations
Time；
Specifically：To minimize the active loss of low-voltage network as target, low pressure:Distribution network var compensation is distributed
Optimized model is as follows：
min f(x)
S.t h (x)=0,
In above formula：Object function f (x) is the difference of investment cost and drop damage income；H (x) is that the power of each node is flat
Weigh equation, and x is the decision variable and state variable of system, and decision variable is the parallel reactive compensation capacity Q of reactive compensation point, shape
State variable includes the voltage magnitude V and phase angle δ of each node；Inequality constraints l (x) include the bound of each node voltage amplitude about
The bound of beam and each reactive compensation point parallel reactive compensation capacity constrains and the bound of power factor is divided with compensation equipment
The bound of group number；
The difference of object function f (x) investment costs and drop damage income, expression formula are as follows：
F (x)=P1-P2
Step 32：The constraints；Equality constraint h (x) expression formulas are：
It can be obtained by Load flow calculation equation：
In above formula, PiAnd QiIt is the active power and reactive power of taiwan area injection respectively, it is negative, Q to flow into just, to flow outci
For the reactive power of compensation, ViFor the voltage magnitude of node i, δijFor the phase difference of voltage between node i and node j, GijAnd Bij
It is the real and imaginary parts of network node admittance matrix the i-th row j column elements respectively, n is the sum of taiwan area node；
Inequality constraints l (x) expression formulas are：
V in above formulaimin、VimaxIt is the minimum voltage and maximum voltage that node allows, Qcimin、QcimaxIt is node to allow most
It is small idle with maximum reactive-load compensation compensation, ρimin、ρimaxIt is the minimum and maximum power factor that node measured place allows,It is the minimum packets number and largest packet number for compensating equipment switching.
The step 4 includes：
Step 41：The compensation rate that taiwan area all nodes in Typical Rural respectively need is calculated first, calculates taiwan area needs
The progress reactive-load compensation of each node is not met reality, using Sensitivity Analysis Method and artificially by total reactive compensation capacity
Factor method selects the node that the node that load power is big, important is compensated as needs；Every in population is mended using genetic algorithm
It repays equipment and sets 2 genes on chromosome, indicate the packet count and every group of compensation capacity of compensation equipment respectively, calculate egress
Optimal non-workcompensation capacity；
Step 42：When calculating the idle configuration optimization of different type taiwan area on the basis of step 41, three are defined first
Electric characteristic index circuit distribution transforming Rate of average load α, natural power factor cos φ, radius of electricity supply L, reactive-load compensation rate β, according to
《Rural power planning and designing directive/guide》With the specific electric characteristic index system in local rural area, typical rural area electrical specifications are set
As ground state value；
In above formula, β0For the optimal reactive compensation rate of Typical Rural taiwan area, WnHold for the idle configuration that the taiwan area requires supplementation with
Amount, SNFor the rated capacity of taiwan area；
When calculating the reactive compensation capacity of random taiwan area by changing each electric characteristic index respectively, OPTIMAL REACTIVE POWER is recorded
The situation of change of cancellation ratio indicates that the variation degree of reactive-load compensation rate, the size of sensitivity are equal to respectively with the size of sensitivity
The variation of the corresponding reactive-load compensation rate of electric characteristic variation exists in the reactive capability configuration for carrying out random taiwan area, with each electrical
The difference of the actual value of characteristic value electric characteristic corresponding with typical taiwan area carries out phase as decision using the size of sensitivity
The weighted calculation answered；
β in above formula0For the reactive-load compensation rate of typical taiwan area, Δ miIt is right for random taiwan area and typical taiwan area electrical characteristics
The difference answered, λiFor the sensitivity corresponding to electrical characteristics.
The step 5 includes：
Step 51：Determine that the reducing loss measure of rural power grids taiwan area is denoted as X firsti, wherein i=1,2 ..., 4；X1~X4It is right with this
Reactive-load compensation, improvement three-phase imbalance, replacement transformer capacity, replacement circuit section is answered to accumulate these four rural power grids taiwan areas drop damage and arrange
Apply type；On this basis, scheme is damaged using the possible embodiment of certain a kind of reducing loss measure as the drop in rural power grids taiwan area drop damage,
AsIndicate the jth kind possible embodiment of i-th kind of reducing loss measure type；X1The corresponding drop damage scheme of reducing loss measure has transformation
It stands centralized compensation, user's decentralised control, Optimal Reactive Power compensation device；X2The corresponding drop damage scheme of reducing loss measure has change client to connect
Line phase sequence, three-phase imbalance pressure regulator, auto-transformer；X3The corresponding drop damage scheme of reducing loss measure has volume reduction transformation method, transformation
Device way of economic operation, energy saving transformer；X4The corresponding drop damage scheme of reducing loss measure has parallel gathering lead wire in low, increases conducting wire section
Area, line insulation transformation；
For reducing loss measure Xi, since the presence of analysis of Influential Factors is lost, from reducing loss measure weighing factor analysis and assessment
As a result the larger reducing loss measure type of weight is selected in, and alternately reducing loss measure is implemented present situation rural power grids taiwan area, thus,
To reducing loss measure XiWhether selected available following formula describes；
For selected reducing loss measure, it is further contemplated that its possible reducing loss measure implements project, it is possible to
Damage project dropsFor the description of the implementation principle of rural power grids taiwan area reducing loss measure, according to artificial experience and different existing optimizations
Algorithm proposes a variety of alternative implementation projects to every a kind of reducing loss measure type, and following formula is in i-th kind of reducing loss measure
The whether selected description made of jth kind drop damage project；
Step 52：In order to ensure that drop damage reaches better effect drop damage alternative is formed by following steps；
Drop damage alternative is formed by drop damage projects combo, since the presence of analysis of Influential Factors is lost in rural power grids taiwan area,
The major influence factors of the influence rural power grids taiwan area technological attrition in present situation rural power grids taiwan area and its corresponding can be primarily determined
Reducing loss measure type, thus, can determine the situation of choosing of reducing loss measure generating the when of dropping damage alternative, it is assumed that warp
Selected reducing loss measure is respectively X after crossing loss analysisa、Xb、Xc, then drop damages the composition structure of candidate item such as in this case
Under：
In the case of the implementation project determination of every a kind of reducing loss measure type, a drop damage candidate item is drop damage project
The combination of selected situation, while also meeting drop damage projectBetween alternative, be shown below：
In above formula：fiRefer to i-th of drop damage candidate item；G refers to the alternative between drop damage project, i.e., same kind of drop damage is arranged
Implementation of the different implementation projects applied in rural power grids taiwan area is impossible simultaneous constraint；Mutex relation constraint master between project
If being embodied in drop damages decision process；
The product process of rural power grids taiwan area drop damage candidate item is as follows：
(1) the loss shadow that key important function is played to rural power grids taiwan area technical loss is established by rural power grids taiwan area loss analysis
The factor of sound；
(2) it is based on sensitivity analysis, establishes the reducing loss measure X in rural power grids taiwan area Optimal Decision-makingiChoose situation；
(3) to each selected reducing loss measure Xi, obtained for choosing by the research of each measure scheme weight analysis
The drop damage project selected
(4) according to the initial rural power grids taiwan area drop damage candidate item f of the various combination producings of drop damage projecti；
Step 53：In damage decision model drops in rural power grids taiwan area, it is present situation rural power grids taiwan area band that should fully embody reducing loss measure
The comprehensive benefit of the drop damage electricity come is established by analyzing Evaluation of Investment-Benefit comprising objective function of decision-making and decision constraint
The rural power grids taiwan area drop damage Optimization Decision Models of condition；
(1) object function of decision；
Reach comprehensive optimal to make rural power grids taiwan area Construction and operation cost and loss of electricity reduce acquired benefit, in the full longevity
Under the support for ordering life cycle costing theory, establish the overall cost that object function includes rural power grids taiwan area in the operation time limit, drop damage at
Sheet, operation expense, failure cost and cost recovery is removed, sale of electricity expense caused by loss of electricity；
(2) constraints of decision：
The constraints of rural power grids taiwan area drop damage Optimization Decision Models includes six contents：Power supply reliability constraint, Yong Huping
Mutex relation constrains between equal power off time constraint, voltage deviation constraint, line transmission constraint, investment restriction and project；
1. power supply reliability constrains：Power supply reliability should be not less than preset prescribed limits；
2. average power off time of user constrains：Average power off time of user should be no more than preset prescribed limits；
3. voltage deviation constrains：The absolute value of voltage deviation should be no more than the 7% of normal voltage；
4. line transmission constrains：The actual transmissions capacity of circuit should be no more than its maximum transfer capacity, general transmission electricity
Flow table is shown；
5. investing restriction：Investment restriction refers to taking the investment of the drop damage scheme of a variety of reducing loss measure combinations
Should be within preset investment limitation, drop damage formula investing is primarily directed to drop damage cost at this time；
(3) Evaluation of Investment-Benefit index：
It, should first really for rural power grids wastage reducing and energy saving transformation project according to the basic step of technology and economy comparison and evaluation
Vertical relevant art index, then economic indicator optimum selecting is pressed from the scheme of technical indicator qualification；The particular technique of damage scheme drops
Index includes electric energy loss rate, rate of qualified voltage, power factor and service life；
According to《Rural cadastration Guidance Rule》In " economic technology assessment " regulation drop damage scheme economic indicator packet
Include investment payback time, net present value (NPV), net annual value, net present value rate and the internal rate of return (IRR)；
(4) decision of drop damage prioritization scheme：
The decision purpose of drop damage scheme is excellent to selecting the drop damage scheme collection of possibility to carry out comprising various reducing loss measures
Choosing determines the optimal reducing loss measure combination of comprehensive benefit and drop damage embodiment.
The step 6 includes：
Step 61：If the reactive compensation capacity calculated in step 4 is c1, the reactive compensation capacity calculated in step 5 is c2,
If the difference that the two calculates is less than the nargin ε of setting, it is c to take reactive compensation capacity1If the difference of the two is more than setting
Nargin then establishes decomposition-coordination approach and solves reactive compensation capacity；An original object function is resolved into two to connect each other
Specific item scalar functions；Two sub- object function interactions, common optimization find out final reactive compensation capacity；
Step 62：Initially set up mathematical model：
min C(x)+D(x)
s.t A(x)≥B
E(x)+F(x)≥g
R (x)+T (x)=h
X is the reactive compensation capacity size that is configured in above formula, and y is power grid actual operation parameters under existing configuration, C (x)+
D (x) is the expense for configuring reactive power source, and A (x) >=B is investment and recovery (planned allocation constrains, configuration capacity constraint), E (x)+F
(x) >=g is voltage inequality constraints, and R (x)+T (x)=h constrains for trend equation；
As long as reactive compensation capacity investment variable x is decided, so that it may be determined by the optimizing of system operation mode practical
Operating parameter y；That is as former problem can be regarded to the unification of two optimization process, one is to determine idle configuration capacity position
With the investment optimization process of size, primal problem is referred to as invested；Two are to determine and so that operating cost is reached most under existing configuration
Small running optimizatin process, referred to as runs subproblem；
As given any determination capacity x*, the optimal value D of corresponding operation subproblem is represented by W (x), then corresponding to invest
Primal problem and operation subproblem decomposable asymmetric choice net are as follows：
(1) primal problem is invested：
Min C(x)+W(x)
s.t A(x)≥B
In above formula, C (x)+W (x) is the total cost of investment, and wherein W (x) is a knob for contacting primal problem with subproblem
Band, A (x) >=B are the conditions of investment and recovery；
(2) subproblem is run：
W (x)=minD (y)
s.t F(x)≥g-E(x*)
T (y)=h-R (x*)
In above formula, minD (y) is optimal the spent expense of operation, F (x) >=g-E (x*) it is voltage inequality constraints, T
(y)=h-R (x*) it is that trend equation constrains；
Obviously, the primal problem of investment and the subproblem of operation are closely connected with W (x) here, by running son
The solution of problem proposes the amendment to W (x), forms linear restriction new after correcting, and returns again to investment primal problem, alternately solves
Primal problem and subproblem simultaneously obtain the optimal solution of reactive-load compensation amount.
Compared with prior art, advantages of the present invention and advantageous effect are：
The present invention is using dividing gradient search procedure to obtain accurate physical parameter in the topological structure of fully analysis network
Accurate line loss calculation is prepared；It is used according to the different characteristics of rural power grids typical case's taiwan area and radius of electricity supply, transformer model capacity
The data cleansing and excavation of the physical parameters such as the time limit, power load distributing situation.Rural power grids taiwan area is calculated using the improved trend method that is pushed forward
Loss so that the line loss result of calculating is more accurate, on the basis of line loss carry out reactive-load compensation add voltage, power because
Number, compensation capacity, the constraints for compensating equipment, reactive-load compensation can accomplish idle in-situ balancing, carry out reducing loss measure
It can accomplish to adjust voltage simultaneously, make every effort to the best compensation effect taken.It is idle in progress in order to obtain preferably drop damage effect
Increasing on the basis of compensation improves three-phase imbalance, replaces transformer capacity, replaces the reducing loss measures such as circuit section product.
In the following with reference to the drawings and specific embodiments, further description and explanation are subject to the present invention, but are not implemented by this
Example is limited.
Description of the drawings
Fig. 1 is the voltage and power diagram of the corresponding circuit of the method for the present invention；
Fig. 2 is the corresponding taiwan area structure chart of the method for the present invention；
Fig. 3 is the composition structure chart of the corresponding drop damage scheme of the method for the present invention；
Fig. 4 is the reducing loss measure optimization block diagram of the rural power grids taiwan area of the corresponding returns of investment rate of the method for the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, clear, complete description is carried out to technical scheme of the present invention.Obviously, described embodiment is that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of the every other embodiment that is obtained, shall fall within the protection scope of the present invention.
A kind of drops such as reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation of the invention damage optimization method, including walk as follows
Suddenly：
Step 1：The topological structure for analyzing network is accurate using dividing gradient search procedure to obtain accurate physical parameter
Line loss calculation is prepared；According to the different characteristics of rural power grids typical case's taiwan area and radius of electricity supply, transformer model capacity service life, bear
The data cleansing and excavation of the physical parameters such as lotus distribution situation carry out typicalness classification to rural power grids taiwan area.
According to the network structure of distribution network system and switch operating status, classify to the load of power distribution network, according to not
With load and whether there is or not measuring values to carry out a point gradient search, to obtain the parameter of each branch of system and the voltage of node, active
Power and reactive power.
The active and reactive power and voltage value of main transformer, distribution transforming in first gradient search distribution feeder.
Transformer for failing to obtain real-time measurement carries out the second gradient search, and complete and precision satisfaction is wanted in order to obtain
The operating parameter asked, the use state estimation technique carry out line loss calculation.
In the quantity for having searched for transformer, 3rd gradient search is carried out, is searched on user and overhead transmission line, cable run
Each node forms node matrix equation.
Step 2：Using the improved loss for being pushed forward trend method and calculating rural power grids taiwan area；
The improved trend method that is pushed forward refers to taking being averaged for acquired results by measurement to node voltage value and calculating
For value so that the voltage value of each node is more accurate, the line loss value of calculating is truer.
The step 2 includes：By obtaining the measured data of each end load node, each section is calculated by prospective method
The voltage value and performance number of the corresponding last node of point, if as soon as upper node uses without measured value and calculate forward calculation institute
The voltage value obtained takes the average value of measured value and calculated value if any measured value；If a upper node corresponds to two load bus,
If this node takes two loads to be pushed forward the average value of voltage without measured value, the average value of three's value is otherwise taken, and so on；Directly
To root node.The result of line loss is equal to the total losses that transformer calculates and adds the total losses calculated on circuit.
Aloss=Tloss+Lloss
A in above formulalossFor all line loss, TlossFor the loss of transformer, LlossFor the loss of transmission line of electricity.
Step 21：Known to line impedance parameter, as long as measuring active and reactive, the voltage of load bus
Virtual value, so that it may accurately to find out very much loss between load bus and its superior node on circuit and superior node
Voltage, and calculating line loss and node voltage all avoid plural multiplication and division.Circuit l between node 2 to 3 as shown in Figure 12-3
It is Z per phase of impedance2-3=R2-3+jX2-3The three-phase output power for measuring node 3 simultaneously is P3+jQ3, line voltage virtual value is U3。
Circuit l2-3On active power loss be：
In above formula, Δ P2-3Refer to circuit l2-3On active loss；P3It is the active power of node 3, Q3It is node 3
Reactive power；U3It is the voltage of node 3, R2-3It is circuit l2-3On resistance value.
Reactive power loss is：
In above formula, Δ Q2-3Refer to circuit l2-3On active loss；P3It is the active power of node 3, Q3It is node 3
Reactive power；U3It is the voltage of node 3, R2-3It is circuit l2-3On resistance value.
The output power of node 2 is：
S2=(P3+ΔP2-3)+j(Q3+ΔQ2-3)
In above formula, S2Refer to the output power of node 2；P3It is the active power of node 3, Q3It is the idle work(of node 3
Rate；ΔP2-3、ΔQ2-3It is circuit l respectively2-3The active power and reactive power of upper loss.
The voltage effective value U of node 22For：
In above formula, U2Refer to the RMS voltage Δ U of node 22-3、δU2-3It is circuit l2-3The vertical component of voltage landing and
Horizontal component.
Step 22：Assuming that a certain taiwan area, structure are as shown in Figure 2.The taiwan area shares 11 nodes, it is known that each node it
Between resistance, reactance, and by data collecting system have been obtained for the active power of each load bus, reactive power,
Voltage effective value.
Steps are as follows for the specific implementation of algorithm：
(1) node-classification is carried out first and is numbered, and power supply node, load bus are distinguished.
By taking Fig. 2 as an example, power supply node is 0 node, 2,3,8,9,10 node of load bus
(2) by obtaining the measured data of each end load node, by prospective method calculate each node it is corresponding on
The voltage value and performance number of a node, if as soon as upper node uses the voltage value calculated obtained by forward calculation without measured value,
If any measured value, the average value of measured value and calculated value is taken；If a upper node corresponds to two load bus, if this node without
Measured value, takes two loads to be pushed forward the average value of voltage, otherwise takes the average value of three's value, and so on；Until power supply node.
Circuit between node 8 and 6 as shown in Figure 2 is l8-6Each impedance between circuit is Z8-6=R8-6+jX8-6It measures
8 node of load three output powers be P8+jQ8Then circuit l8-6Between active power loss：
In above formula, Δ P8-6It is circuit l8-6Active power loss, P8It is the active power of node 8, Q8Node 8 it is idle
Power, U8It is the voltage effective value of node 8, R8-6It is circuit l8-6Between impedance.
Reactive power loss is：
In above formula, Δ Q8-6It is circuit l8-6Reactive power loss, P8It is the active power of node 8, Q8Node 8 it is idle
Power, U8It is the voltage effective value of node 8, X8-6It is circuit l8-6Between reactance.
The output power of node 6 is：
S6=P6+jQ6=(P8+ΔP8-6)+j(Q8+ΔQ8-6)
In above formula, S6Refer to the output power of node 6；P6It is the active power of node 6, Q6It is the idle work(of node 6
Rate；ΔP8-6、ΔQ8-6It is circuit l respectively8-6The active power and reactive power of upper loss.P8、Q8It is the wattful power of node 8 respectively
Rate and reactive power.
The voltage value of node 6 is：
In above formula, U8For the voltage effective value of node 8, Δ U8-6For circuit l8-6The vertical component of voltage landing, δ U8-6For line
Road l8-6The horizontal component of voltage landing.
Wherein：
Circuit l can similarly be passed through9-6The voltage and output power for calculating node 6, if the voltage of node 6 can be measured
Value obtains the voltage value and performance number of node 6 with output power by calculating the average value of three, if the node 6 that do not survey
The voltage value of voltage value and performance number, node 6 takes the average value of calculating, performance number also to take the average value of calculating.
(3) circuit having had been calculated is marked, continue search for the circuit of non-marked until all circuits all
It calculates.
(4) it calculates the loss of all common transformers, when calculating, the node load of actual measurement, voltage value is utilized to calculate transformation
The copper loss and iron loss of device.So, transformer loss calculates the influence for just having fully taken into account load, voltage.
(5) total line loss：
Aloss=Tloss+Lloss
Wherein AlossFor all line loss, TlossFor the loss of transformer, LlossFor the loss of transmission line of electricity.
Step 3：It establishes the object function of idle work optimization and adds voltage, power factor, compensation capacity, the pact for compensating equipment
Beam condition；
Step 31：The object function：
min(P1-P2)
Wherein P1 is investment cost, and P2 is drop damage income, and object function is the minimum value of two differences.
Wherein：
In above formula, n is that node compensates equipment sum；NiFor the packet count of the compensation capacitor of the i-th complete equipment；Ci is compensation
The capacity of the corresponding single group capacitor of equipment；Ma is the unit price of compensation capacity；Mb is the single group price for compensating equipment；Mc is
Expense input by equipment is installed.
Wherein：
P2=(f1-f2)·c·T
In above formula, f1For the power loss before compensation, f2For the power loss after compensation, c is corresponding electricity price, T operations
Time.
Specifically：To minimize the active loss of low-voltage network as target, low pressure:Distribution network var compensation is distributed
Optimized model is as follows：
min f(x)
S.t h (x)=0,
In above formula：Object function f (x) is the difference of investment cost and drop damage income；H (x) is that the power of each node is flat
Weigh equation, and x is the decision variable and state variable of system, and decision variable is the parallel reactive compensation capacity Q of reactive compensation point, shape
State variable includes the voltage magnitude V and phase angle δ of each node.Inequality constraints l (x) include the bound of each node voltage amplitude about
The bound of beam and each reactive compensation point parallel reactive compensation capacity constrains and the bound of power factor is divided with compensation equipment
The bound of group number.
The difference of object function f (x) investment costs and drop damage income, expression formula are as follows：
F (x)=P1-P2
Step 32：The constraints.
Equality constraint h (x) expression formulas are：
It can be obtained by Load flow calculation equation：
In above formula, PiAnd QiIt is the active power and reactive power of taiwan area injection respectively, it is negative, Q to flow into just, to flow outci
For the reactive power of compensation, ViFor the voltage magnitude of node i, δijFor the phase difference of voltage between node i and node j, GijAnd Bij
It is the real and imaginary parts of network node admittance matrix the i-th row j column elements respectively, n is the sum of taiwan area node.
Inequality constraints l (x) expression formulas are：
V in above formulaimin、VimaxIt is the minimum voltage and maximum voltage that node allows, Qcimin、QcimaxIt is the minimum that node is permitted
It is idle to be compensated with maximum reactive-load compensation, ρ imin、ρimaxIt is the minimum and maximum power factor that node measured place allows,It is the minimum packets number and largest packet number for compensating equipment switching.
Step 4：It determines the compensation position of the reactive-load compensation of different type typical case's taiwan area and each compensates what equipment should compensate
Capacity；
Step 41：The compensation rate that taiwan area all nodes in Typical Rural respectively need is calculated first, calculates taiwan area needs
The progress reactive-load compensation of each node is not met reality, using Sensitivity Analysis Method and artificially by total reactive compensation capacity
Factor method selects the node that the node that load power is big, important is compensated as needs.Every in population is mended using genetic algorithm
It repays equipment and sets 2 genes on chromosome, indicate the packet count and every group of compensation capacity of compensation equipment respectively, calculate egress
Optimal non-workcompensation capacity.
Step 42：When calculating the idle configuration optimization of different type taiwan area on the basis of step 41, three are defined first
Electric characteristic index circuit distribution transforming Rate of average load α, natural power factor cos φ, radius of electricity supply L, reactive-load compensation rate β, according to
《Rural power planning and designing directive/guide》With the specific electric characteristic index system in local rural area, typical rural area electrical specifications are set
As ground state value.
In above formula, β0For the optimal reactive compensation rate of Typical Rural taiwan area, WnHold for the idle configuration that the taiwan area requires supplementation with
Amount, SNFor the rated capacity of taiwan area.
When calculating the reactive compensation capacity of random taiwan area by changing each electric characteristic index respectively, OPTIMAL REACTIVE POWER is recorded
The situation of change of cancellation ratio indicates that the variation degree of reactive-load compensation rate, the size of sensitivity are equal to respectively with the size of sensitivity
The variation of the corresponding reactive-load compensation rate of electric characteristic variation exists in the reactive capability configuration for carrying out random taiwan area, with each electrical
The difference of the actual value of characteristic value electric characteristic corresponding with typical taiwan area carries out phase as decision using the size of sensitivity
The weighted calculation answered.
β in above formula0For the reactive-load compensation rate of typical taiwan area, Δ miIt is right for random taiwan area and typical taiwan area electrical characteristics
The difference answered, λiFor the sensitivity corresponding to electrical characteristics.
Step 5：Establish the rural power grids taiwan area of more reducing loss measure combinations.
Step 51：Determine that the reducing loss measure of rural power grids taiwan area is denoted as X firsti, wherein i=1,2 ..., 4；X1~X4It is right with this
Reactive-load compensation, improvement three-phase imbalance, replacement transformer capacity, replacement circuit section is answered to accumulate these four rural power grids taiwan areas drop damage and arrange
Apply type.On this basis, scheme is damaged using the possible embodiment of certain a kind of reducing loss measure as the drop in rural power grids taiwan area drop damage,
AsIndicate the jth kind possible embodiment of i-th kind of reducing loss measure type.X1The corresponding drop damage scheme of reducing loss measure has change
Pressure station centralized compensation, user's decentralised control, Optimal Reactive Power compensation device.X1The corresponding drop damage scheme of reducing loss measure has change client
Wiring phase sequence, three-phase imbalance pressure regulator, auto-transformer.X3The corresponding drop damage scheme of reducing loss measure has volume reduction transformation method, becomes
Depressor way of economic operation, energy saving transformer.X4The corresponding drop damage scheme of reducing loss measure has parallel gathering lead wire in low, increases conducting wire
Sectional area, line insulation transformation.
For reducing loss measure Xi, since the presence of analysis of Influential Factors is lost, from reducing loss measure weighing factor analysis and assessment
As a result the larger reducing loss measure type of weight is selected in, and alternately reducing loss measure is implemented present situation rural power grids taiwan area, thus,
To reducing loss measure XiWhether selected available following formula describes.
For selected reducing loss measure, it is further contemplated that its possible reducing loss measure implements project, it is possible to
Damage project dropsIt, can be existing with difference according to artificial experience for the description of the implementation principle of rural power grids taiwan area reducing loss measure
Optimization algorithm proposes a variety of alternative implementation projects to every a kind of reducing loss measure type, and following formula is to i-th kind of reducing loss measure
In the whether selected description made of jth kind drop damage project.
The composition structure chart of the corresponding drop damage scheme of the method for the present invention is as shown in Figure 3.
Step 52：In order to ensure that drop damage reaches better effect drop damage alternative is formed by following steps.
Drop damage alternative is formed by drop damage projects combo, since the presence of analysis of Influential Factors is lost in rural power grids taiwan area,
The major influence factors of the influence rural power grids taiwan area technological attrition in present situation rural power grids taiwan area and its corresponding can be primarily determined
Reducing loss measure type, thus, can determine the situation of choosing of reducing loss measure generating the when of dropping damage alternative, it is assumed that warp
Selected reducing loss measure is respectively X after crossing loss analysisa、Xb、Xc, then the composition structure such as 3 of damage candidate item drops in this case
Shown in figure：
In the case of the implementation project determination of every a kind of reducing loss measure type, a drop damage candidate item is drop damage project
The combination of selected situation, while also meeting drop damage projectBetween alternative, be shown below：
In above formula：fiRefer to i-th of drop damage candidate item；G refers to the alternative between drop damage project, i.e., same kind of drop damage is arranged
Implementation of the different implementation projects applied in rural power grids taiwan area is impossible simultaneous constraint.Mutex relation constraint master between project
If being embodied in drop damages decision process.
The product process of rural power grids taiwan area drop damage candidate item is as follows：
(1) the loss shadow that key important function is played to rural power grids taiwan area technical loss is established by rural power grids taiwan area loss analysis
The factor of sound；
(2) it is based on sensitivity analysis, establishes the reducing loss measure X in rural power grids taiwan area Optimal Decision-makingiChoose situation；
(3) to each selected reducing loss measure Xi, obtained for choosing by the research of each measure scheme weight analysis
The drop damage project selected
(4) according to the initial rural power grids taiwan area drop damage candidate item f of the various combination producings of drop damage projecti；
Step 53：In damage decision model drops in rural power grids taiwan area, it is present situation rural power grids taiwan area band that should fully embody reducing loss measure
The comprehensive benefit of the drop damage electricity come is established by analyzing Evaluation of Investment-Benefit comprising objective function of decision-making and decision constraint
The rural power grids taiwan area drop damage Optimization Decision Models of condition, the reducing loss measure optimization frame of rural power grids taiwan area are as shown in Figure 4.
(1) object function of decision：
Reach comprehensive optimal to make rural power grids taiwan area Construction and operation cost and loss of electricity reduce acquired benefit, in the full longevity
Under the support for ordering life cycle costing theory, establish overall cost that object function includes rural power grids taiwan area in the operation time limit (drop damage at
Sheet, operation expense, failure cost and remove cost recovery), sale of electricity expense caused by loss of electricity.
(2) constraints of decision：
The constraints of rural power grids taiwan area drop damage Optimization Decision Models includes six contents：Power supply reliability constraint, Yong Huping
Mutex relation constrains between equal power off time constraint, voltage deviation constraint, line transmission constraint, investment restriction and project.
1. power supply reliability constrains：Power supply reliability should be not less than preset prescribed limits.
2. average power off time of user constrains：Average power off time of user should be no more than preset prescribed limits.
3. voltage deviation constrains：The absolute value of voltage deviation should be no more than the 7% of normal voltage.
4. line transmission constrains：The actual transmissions capacity of circuit should be no more than its maximum transfer capacity, general transmission electricity
Flow table is shown.
5. investing restriction：Investment restriction refers to taking the investment of the drop damage scheme of a variety of reducing loss measure combinations
Should be within preset investment limitation, drop damage formula investing is primarily directed to drop damage cost at this time.
(3) Evaluation of Investment-Benefit index：
It, should first really for rural power grids wastage reducing and energy saving transformation project according to the basic step of technology and economy comparison and evaluation
Vertical relevant art index, then economic indicator optimum selecting is pressed from the scheme of technical indicator qualification.The particular technique of damage scheme drops
Index includes electric energy loss rate, rate of qualified voltage, power factor and service life etc..
According to《Rural cadastration Guidance Rule》In " economic technology assessment " regulation drop damage scheme economic indicator packet
Include investment payback time, net present value (NPV), net annual value, net present value rate and internal rate of return (IRR) etc..
(4) decision of drop damage prioritization scheme：
The decision purpose of drop damage scheme is excellent to selecting the drop damage scheme collection of possibility to carry out comprising various reducing loss measures
Choosing determines the optimal reducing loss measure combination of comprehensive benefit and drop damage embodiment.
Step 6：Establish the reactive compensation capacity of decomposition-coordination approach.
Step 61：If the reactive compensation capacity calculated in step 4 is c1, the reactive compensation capacity calculated in step 5 is c2,
If the difference that the two calculates is less than the nargin ε of setting, it is c to take reactive compensation capacity1If the difference of the two is more than setting
Nargin then establishes decomposition-coordination approach and solves reactive compensation capacity.An original object function is resolved into two to connect each other
Specific item scalar functions.Two sub- object function interactions, common optimization find out final reactive compensation capacity.
Step 62：Initially set up mathematical model：
min C(x)+D(x)
s.t A(x)≥B
E(x)+F(x)≥g
R (x)+T (x)=h
X is the reactive compensation capacity size that is configured in above formula, and y is power grid actual operation parameters under existing configuration, C (x)+
D (x) is the expense for configuring reactive power source, and A (x) >=B is investment and recovery (planned allocation constrains, configuration capacity constraint), E (x)+F
(x) >=g is voltage inequality constraints, and R (x)+T (x)=h constrains for trend equation.
As long as reactive compensation capacity investment variable x is decided, so that it may be determined by the optimizing of system operation mode practical
Operating parameter y.That is as former problem can be regarded to the unification of two optimization process, one is to determine idle configuration capacity position
With the investment optimization process of size, primal problem is referred to as invested；Two are to determine and so that operating cost is reached most under existing configuration
Small running optimizatin process, referred to as runs subproblem.
As given any determination capacity x*, the optimal value D of corresponding operation subproblem is represented by W (x), then corresponding to invest
Primal problem and operation subproblem decomposable asymmetric choice net are as follows：
(1) primal problem is invested：
Min C(x)+W(x)
s.t A(x)≥B
In above formula, C (x)+W (x) is the total cost of investment, and wherein W (x) is a knob for contacting primal problem with subproblem
Band, A (x) >=B are the conditions of investment and recovery.
(2) subproblem is run：
W (x)=minD (y)
s.t F(x)≥g-E(x*)
T (y)=h-R (x*)
In above formula, minD (y) is optimal the spent expense of operation, F (x) >=g-E (x*) it is voltage inequality constraints, T
(y)=h-R (x*) it is that trend equation constrains.
Obviously, the primal problem of investment and the subproblem of operation are closely connected with W (x) here, by running son
The solution of problem proposes the amendment to W (x), forms linear restriction new after correcting, returns again to investment primal problem.Alternately solve
Primal problem and subproblem simultaneously obtain the optimal solution of reactive-load compensation amount.
Claims (7)
1. the drops such as the reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation damage optimization method, it is characterized in that：Include the following steps：
Step 1：The topological structure for analyzing network is accurate line loss using dividing gradient search procedure to obtain accurate physical parameter
Calculating is prepared；According to the different characteristics of rural power grids typical case's taiwan area and radius of electricity supply, transformer model capacity service life, load point
The data cleansing and excavation of the physical parameters such as cloth situation carry out typicalness classification to rural power grids taiwan area；
Step 2：Using the improved loss for being pushed forward trend method and calculating rural power grids taiwan area；
Step 3：It establishes the object function of idle work optimization and adds voltage, power factor, compensation capacity, the constraint item for compensating equipment
Part；
Step 4：Determine the compensation position of the reactive-load compensation of different type typical case's taiwan area and the capacity that each compensation equipment should compensate；
Step 5：Establish the rural power grids taiwan area of more reducing loss measure combinations；
Step 6：Establish the reactive compensation capacity of decomposition-coordination approach.
2. the drops such as the reactive-load compensation according to claim 1 based on rural power grids typical case's taiwan area line loss calculation damage optimization method,
It is characterized in：The step 1 includes：According to the network structure of distribution network system and switch operating status, to the load of power distribution network into
Row classification, according to different loads and whether there is or not measuring values to carry out a point gradient search, to obtain the parameter and section of each branch of system
Voltage, active power and the reactive power of point；
The active and reactive power and voltage value of main transformer, distribution transforming in first gradient search distribution feeder；
Transformer for failing to obtain real-time measurement carries out the second gradient search, and complete and precision is met the requirements in order to obtain
Operating parameter, the use state estimation technique carry out line loss calculation；
In the quantity for having searched for transformer, 3rd gradient search is carried out, is searched for each on user and overhead transmission line, cable run
Node forms node matrix equation.
3. the drops such as the reactive-load compensation according to claim 1 based on rural power grids typical case's taiwan area line loss calculation damage optimization method,
It is characterized in：Described in the step 2 it is improved be pushed forward trend method refer to taken as measurement to node voltage value and calculating obtained by
As a result average value makes the voltage value of each node more accurate, and the line loss value of calculating is truer；
The step 2 includes：By obtaining the measured data of each end load node, each node pair is calculated by prospective method
The voltage value and performance number for the last node answered, if as soon as upper node is used and calculated obtained by forward calculation without measured value
Voltage value takes the average value of measured value and calculated value if any measured value；If a upper node corresponds to two load bus, if
This node takes two loads to be pushed forward the average value of voltage without measured value, otherwise takes the average value of three's value, and so on；Until root
Node；The result of line loss is equal to the total losses that transformer calculates and adds the total losses calculated on circuit；
Aloss=Tloss+Lloss
A in above formulalossFor all line loss, TlossFor the loss of transformer, LlossFor the loss of transmission line of electricity；
Step 21：Known to line impedance parameter, as long as it is effective to measure the active and reactive of load bus, voltage
Value, so that it may accurately to find out very much the voltage of loss and superior node between load bus and its superior node on circuit,
And calculating line loss and node voltage all avoid plural multiplication and division；Circuit l between node 2 to 32-3It is Z per phase of impedance2-3=
R2-3+jX2-3The three-phase output power for measuring node 3 simultaneously is P3+jQ3, line voltage virtual value is U3；
Circuit l2-3On active power loss be：
In above formula, Δ P2-3Refer to circuit l2-3On active loss；P3It is the active power of node 3, Q3It is the idle of node 3
Power；U3It is the voltage of node 3, R2-3It is circuit l2-3On resistance value；
Reactive power loss is：
In above formula, Δ Q2-3Refer to circuit l2-3On active loss；P3It is the active power of node 3, Q3It is the idle of node 3
Power；U3It is the voltage of node 3, R2-3It is circuit l2-3On resistance value；
The output power of node 2 is：
S2=(P3+ΔP2-3)+j(Q3+ΔQ2-3)
In above formula, S2Refer to the output power of node 2；P3It is the active power of node 3, Q3It is the reactive power of node 3；Δ
P2-3、ΔQ2-3It is circuit l respectively2-3The active power and reactive power of upper loss；
The voltage effective value U of node 22For：
In above formula, U2Refer to the RMS voltage Δ U of node 22-3、δU2-3It is circuit l2-3The vertical component of voltage landing and horizontal point
Amount；
Step 22：Assuming that a certain taiwan area, which shares 11 nodes, it is known that resistance, reactance between each node, and lead to
Cross active power, reactive power, voltage effective value that data collecting system has been obtained for each load bus；
Steps are as follows for the specific implementation of algorithm：
(1) node-classification is carried out first and is numbered, and power supply node, load bus are distinguished；Power supply node is 0 node, load bus
For 2,3,8,9,10 nodes；
(2) by obtaining the measured data of each end load node, the corresponding last section of each node is calculated by prospective method
The voltage value and performance number of point, if as soon as upper node uses the voltage value calculated obtained by forward calculation without measured value, if any
Measured value takes the average value of measured value and calculated value；If a upper node corresponds to two load bus, if this node is without actual measurement
Value, takes two loads to be pushed forward the average value of voltage, otherwise takes the average value of three's value, and so on；Until power supply node；
Circuit between node 8 and 6 is l8-6Each impedance between circuit is Z8-6=R8-6+jX8-68 node of load measured
Three output powers are P8+jQ8Then circuit l8-6Between active power loss：
In above formula, Δ P8-6It is circuit l8-6Active power loss, P8It is the active power of node 8, Q8The reactive power of node 8,
U8It is the voltage effective value of node 8, R8-6It is circuit l8-6Between impedance；
Reactive power loss is：
In above formula, Δ Q8-6It is circuit l8-6Reactive power loss, P8It is the active power of node 8, Q8The reactive power of node 8,
U8It is the voltage effective value of node 8, X8-6It is circuit l8-6Between reactance；
The output power of node 6 is：
S6=P6+jQ6=(P8+ΔP8-6)+j(Q8+ΔQ8-6)
In above formula, S6Refer to the output power of node 6；P6It is the active power of node 6, Q6It is the reactive power of node 6；Δ
P8-6、ΔQ8-6It is circuit l respectively8-6The active power and reactive power of upper loss；P8、Q8Be respectively node 8 active power and
Reactive power；
The voltage value of node 6 is：
In above formula, U8For the voltage effective value of node 8, Δ U8-6For circuit l8-6The vertical component of voltage landing, δ U8-6For circuit l8-6
The horizontal component of voltage landing；
Wherein：
Circuit l can similarly be passed through9-6Calculate the voltage and output power of node 6, if can measure the voltage value of node 6 with
Output power obtains the voltage value and performance number of node 6 by calculating the average value of three, if the voltage for the node 6 that do not survey
Value and performance number, the voltage value of node 6 take the average value of calculating, performance number also to take the average value of calculating；
(3) circuit having had been calculated is marked, continues search for the circuit of non-marked until all circuits all calculate
Out；
(4) it calculates the loss of all common transformers, when calculating, utilizes the node load of actual measurement, voltage value calculating transformer
Copper loss and iron loss；So, transformer loss calculates the influence for just having fully taken into account load, voltage；
(5) total line loss：
Aloss=Tloss+Lloss
Wherein AlossFor all line loss, TlossFor the loss of transformer, LlossFor the loss of transmission line of electricity.
4. the drops such as the reactive-load compensation according to claim 1 based on rural power grids typical case's taiwan area line loss calculation damage optimization method,
It is characterized in：Object function described in the step 3：
min(P1-P2)
Wherein P1 is investment cost, and P2 is drop damage income, and object function is the minimum value of two differences；
Wherein：
In above formula, n is that node compensates equipment sum；NiFor the packet count of the compensation capacitor of the i-th complete equipment；Ci is compensation equipment
The capacity of corresponding single group capacitor；Ma is the unit price of compensation capacity；Mb is the single group price for compensating equipment；Mc is installation
Expense input by equipment；
Wherein：
P2=(f1-f2)·c·T
In above formula, f1For the power loss before compensation, f2For the power loss after compensation, c is corresponding electricity price, T operations when
Between；
Specifically：To minimize the active loss of low-voltage network as target, low pressure:Distribution network var compensation is distributed optimization
Model is as follows：
min f(x)
S.t h (x)=0,
In above formula：Object function f (x) is the difference of investment cost and drop damage income；H (x) is the power-balance side of each node
Journey, x are the decision variable and state variable of system, and decision variable is the parallel reactive compensation capacity Q of reactive compensation point, and state becomes
Amount includes the voltage magnitude V and phase angle δ of each node；Inequality constraints l (x) include each node voltage amplitude bound constraint and
The bound constraint of each reactive compensation point parallel reactive compensation capacity and the bound of power factor and compensation device packets number
Bound；
The difference of object function f (x) investment costs and drop damage income, expression formula are as follows：
F (x)=P1-P2
Step 32：The constraints；Equality constraint h (x) expression formulas are：
It can be obtained by Load flow calculation equation：
In above formula, PiAnd QiIt is the active power and reactive power of taiwan area injection respectively, it is negative, Q to flow into just, to flow outciFor compensation
Reactive power, ViFor the voltage magnitude of node i, δijFor the phase difference of voltage between node i and node j, GijAnd BijIt is respectively
The real and imaginary parts of network node admittance matrix the i-th row j column elements, n are the sum of taiwan area node；
Inequality constraints l (x) expression formulas are：
V in above formulaimin、VimaxIt is the minimum voltage and maximum voltage that node allows, Qcimin、QcimaxIt is the minimum nothing that node allows
Work(is compensated with maximum reactive-load compensation, ρimin、ρimaxIt is the minimum and maximum power factor that node measured place allows,It is the minimum packets number and largest packet number for compensating equipment switching.
5. the drops such as the reactive-load compensation according to claim 1 based on rural power grids typical case's taiwan area line loss calculation damage optimization method,
It is characterized in：The step 4 includes：
Step 41：The compensation rate that taiwan area all nodes in Typical Rural respectively need is calculated first, is calculated taiwan area and is needed always
The progress reactive-load compensation of each node is not met reality, utilizes Sensitivity Analysis Method and human factor by reactive compensation capacity
Method selects the node that the node that load power is big, important is compensated as needs；Every compensation in population is set using genetic algorithm
It is standby to set 2 genes on chromosome, the packet count and every group of compensation capacity of compensation equipment are indicated respectively, calculate egress most
Good reactive compensation capacity；
Step 42：When calculating the idle configuration optimization of different type taiwan area on the basis of step 41, three are defined first electrically
Characteristic index circuit distribution transforming Rate of average load α, natural power factor cos φ, radius of electricity supply L, reactive-load compensation rate β, according to《Rural area
Power planning Guidance Rule》With the specific electric characteristic index system in local rural area, typical rural area electrical specifications conduct is set
Ground state value；
In above formula, β0For the optimal reactive compensation rate of Typical Rural taiwan area, WnFor the idle configuration capacity that the taiwan area requires supplementation with,
SNFor the rated capacity of taiwan area；
When calculating the reactive compensation capacity of random taiwan area by changing each electric characteristic index respectively, optimal reactive compensation is recorded
The situation of change of rate indicates that the variation degree of reactive-load compensation rate, the size of sensitivity are electrical equal to each with the size of sensitivity
The variation of reactive-load compensation rate corresponding to changing features is configured in the reactive capability for carrying out random taiwan area with each electric characteristic
The difference of the actual value of value electric characteristic corresponding with typical taiwan area is carried out corresponding as decision using the size of sensitivity
Weighted calculation；
β in above formula0For the reactive-load compensation rate of typical taiwan area, Δ miCorresponding to random taiwan area and typical taiwan area electrical characteristics
Difference, λiFor the sensitivity corresponding to electrical characteristics.
6. the drops such as the reactive-load compensation according to claim 1 based on rural power grids typical case's taiwan area line loss calculation damage optimization method,
It is characterized in：The step 5 includes：
Step 51：Determine that the reducing loss measure of rural power grids taiwan area is denoted as X firsti, wherein i=1,2 ..., 4；X1~X4It is corresponded to this
Reactive-load compensation, improvement three-phase imbalance, replacement transformer capacity, replacement circuit section accumulate these four rural power grids taiwan area reducing loss measure kinds
Class；On this basis, scheme is damaged using the possible embodiment of certain a kind of reducing loss measure as the drop in rural power grids taiwan area drop damage, asIndicate the jth kind possible embodiment of i-th kind of reducing loss measure type；X1The corresponding drop damage scheme of reducing loss measure has transformation station collection
Middle compensation, user's decentralised control, Optimal Reactive Power compensation device；X2The corresponding drop damage scheme of reducing loss measure, which has, changes client's wiring phase
Sequence, three-phase imbalance pressure regulator, auto-transformer；X3The corresponding drop damage scheme of reducing loss measure has volume reduction transformation method, transformer warp
Help the method for operation, energy saving transformer；X4The corresponding drop damage scheme of reducing loss measure has parallel gathering lead wire in low, increases conductor cross-section
Product, line insulation transformation；
For reducing loss measure Xi, since the presence of analysis of Influential Factors is lost, from reducing loss measure weighing factor analysis and assessment result
Selecting the larger reducing loss measure type of weight, alternately reducing loss measure is implemented present situation rural power grids taiwan area, thus, drop is damaged
Measure XiWhether selected available following formula describes；
For selected reducing loss measure, it is further contemplated that its possible reducing loss measure implements project, it is possible to drop damage
ProjectFor the description of the implementation principle of rural power grids taiwan area reducing loss measure, according to artificial experience and different existing optimization algorithms pair
It is proposed that a variety of alternative implementation projects, following formula are to the jth kind drop in i-th kind of reducing loss measure per one kind reducing loss measure type
The whether selected description made of damage project；
Step 52：In order to ensure that drop damage reaches better effect drop damage alternative is formed by following steps；
Drop damage alternative is formed by drop damage projects combo, since the presence of analysis of Influential Factors is lost in rural power grids taiwan area,
It can primarily determine the major influence factors of the influence rural power grids taiwan area technological attrition in present situation rural power grids taiwan area and its corresponding drop
Damage measure type, thus, the situation of choosing of reducing loss measure can be determined when generating drop damage alternative, it is assumed that by damage
Selected reducing loss measure is respectively X after consumption analysisa、Xb、Xc, then the composition structure of drop damage candidate item is as follows in this case：
In the case of the implementation project determination of every a kind of reducing loss measure type, a drop damage candidate item is that drop damage project is selected
The combination of middle situation, while also meeting drop damage projectBetween alternative, be shown below：
In above formula：fiRefer to i-th of drop damage candidate item；G refers to the alternative between drop damage project, i.e., same kind of reducing loss measure
Implementation of the different implementation projects in rural power grids taiwan area is impossible simultaneous constraint；Mutex relation, which constrains, between project is mainly
It is embodied in drop damages decision process；
The product process of rural power grids taiwan area drop damage candidate item is as follows：
(1) by rural power grids taiwan area loss analysis establish on rural power grids taiwan area technical loss rise key important function loss influence because
Element；
(2) it is based on sensitivity analysis, establishes the reducing loss measure X in rural power grids taiwan area Optimal Decision-makingiChoose situation；
(3) to each selected reducing loss measure Xi, alternative drop is obtained by the research of each measure scheme weight analysis
Damage project
(4) according to the initial rural power grids taiwan area drop damage candidate item f of the various combination producings of drop damage projecti；
Step 53：In damage decision model drops in rural power grids taiwan area, it is what present situation rural power grids taiwan area was brought that should fully embody reducing loss measure
The comprehensive benefit of drop damage electricity is established by analyzing Evaluation of Investment-Benefit comprising objective function of decision-making and decision constraints
Rural power grids taiwan area drop damage Optimization Decision Models；
(1) object function of decision；
Reach comprehensive optimal to make rural power grids taiwan area Construction and operation cost and loss of electricity reduce acquired benefit, in week life-cycle
Under the support of current cost theory, it includes overall cost of the rural power grids taiwan area in the operation time limit, drop damage cost, fortune to establish object function
Row maintenance cost, failure cost and cost recovery is removed, sale of electricity expense caused by loss of electricity；
(2) constraints of decision：
The constraints of rural power grids taiwan area drop damage Optimization Decision Models includes six contents：Power supply reliability constraint, user averagely stop
Mutex relation constrains between electric time-constrain, voltage deviation constraint, line transmission constraint, investment restriction and project；
1. power supply reliability constrains：Power supply reliability should be not less than preset prescribed limits；
2. average power off time of user constrains：Average power off time of user should be no more than preset prescribed limits；
3. voltage deviation constrains：The absolute value of voltage deviation should be no more than the 7% of normal voltage；
4. line transmission constrains：The actual transmissions capacity of circuit should be no more than its maximum transfer capacity, general transmission ammeter
Show；
5. investing restriction：Investment restriction refers to taking the investment of the drop damage scheme of a variety of reducing loss measures combinations should be
Within preset investment limitation, drop damage formula investing is primarily directed to drop damage cost at this time；
(3) Evaluation of Investment-Benefit index：
According to the basic step of technology and economy comparison and evaluation, phase should be established first for rural power grids wastage reducing and energy saving transformation project
Technical indicator is answered, then presses economic indicator optimum selecting from the scheme of technical indicator qualification；The particular technique index of damage scheme drops
Including electric energy loss rate, rate of qualified voltage, power factor and service life；
According to《Rural cadastration Guidance Rule》In " economic technology assessment " regulation drop damage scheme economic indicator include throw
Provide payoff period, net present value (NPV), net annual value, net present value rate and the internal rate of return (IRR)；
(4) decision of drop damage prioritization scheme：
The decision purpose of drop damage scheme is to selecting the drop damage scheme collection of possibility to carry out preferably, really comprising various reducing loss measures
Determine the optimal reducing loss measure combination of comprehensive benefit and drop damage embodiment.
7. the drops such as the reactive-load compensation according to claim 1 based on rural power grids typical case's taiwan area line loss calculation damage optimization method,
It is characterized in：The step 6 includes：
Step 61：If the reactive compensation capacity calculated in step 4 is c1, the reactive compensation capacity calculated in step 5 is c2If
The difference that the two calculates is less than the nargin ε of setting, and it is c to take reactive compensation capacity1If the difference of the two is more than the abundant of setting
Degree then establishes decomposition-coordination approach and solves reactive compensation capacity；An original object function is resolved into two to connect each other
Specific item scalar functions；Two sub- object function interactions, common optimization find out final reactive compensation capacity；
Step 62：Initially set up mathematical model：
min C(x)+D(x)
s.t A(x)≥B
E(x)+F(x)≥g
R (x)+T (x)=h
X is the reactive compensation capacity size configured in above formula, and y is power grid actual operation parameters under existing configuration, C (x)+D (x)
To configure the expense of reactive power source, A (x) >=B is investment and recovery (planned allocation constrain, configuration capacity constraint), E (x)+F (x) >=
G is voltage inequality constraints, and R (x)+T (x)=h constrains for trend equation；
As long as reactive compensation capacity investment variable x is decided, so that it may determine actual motion by the optimizing of system operation mode
Parameter y；That is as former problem can regard to the unification of two optimization process, one is to determine idle configuration capacity position and big
Small investment optimization process, referred to as invests primal problem；Two are to determine operating cost are made to reach minimum under existing configuration
Running optimizatin process, referred to as runs subproblem；
As given any determination capacity x*, the optimal value D of corresponding operation subproblem is represented by W (x), then corresponding to invest examination in chief
Topic and operation subproblem decomposable asymmetric choice net are as follows：
(1) primal problem is invested：
Min C(x)+W(x)
s.t A(x)≥B
In above formula, C (x)+W (x) is the total cost of investment, and wherein W (x) is contact primal problem with a tie for subproblem, A
(x) >=B is the condition of investment and recovery；
(2) subproblem is run：
W (x)=minD (y)
s.t F(x)≥g-E(x*)
T (y)=h-R (x*)
In above formula, minD (y) is optimal the spent expense of operation, F (x) >=g-E (x*) be voltage inequality constraints, T (y)=
h-R(x*) it is that trend equation constrains；
Obviously, the primal problem of investment and the subproblem of operation are closely connected with W (x) here, by running subproblem
Solution propose amendment to W (x), form linear restriction new after correcting, return again to investment primal problem, alternately solve examination in chief
Topic and subproblem simultaneously obtain the optimal solution of reactive-load compensation amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019375.0A CN108280539B (en) | 2018-01-09 | 2018-01-09 | Reactive compensation equal-loss-reduction optimization method based on rural power grid typical distribution area line loss calculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019375.0A CN108280539B (en) | 2018-01-09 | 2018-01-09 | Reactive compensation equal-loss-reduction optimization method based on rural power grid typical distribution area line loss calculation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108280539A true CN108280539A (en) | 2018-07-13 |
| CN108280539B CN108280539B (en) | 2021-12-07 |
Family
ID=62803297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810019375.0A Active CN108280539B (en) | 2018-01-09 | 2018-01-09 | Reactive compensation equal-loss-reduction optimization method based on rural power grid typical distribution area line loss calculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108280539B (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109389315A (en) * | 2018-10-19 | 2019-02-26 | 东北大学 | A kind of rural power grids typical case platform area decreasing loss method |
| CN109462232A (en) * | 2018-11-21 | 2019-03-12 | 国网浙江省电力公司湖州供电公司 | A kind of energy conservation optimizing method of power distribution network |
| CN109936148A (en) * | 2019-01-22 | 2019-06-25 | 国网浙江省电力有限公司电力科学研究院 | A kind of measurement method and on-line monitoring system of generating set reactive-current compensation rate |
| CN110401204A (en) * | 2019-08-06 | 2019-11-01 | 竺炜 | 10 kilovolts of overhead line single-point reactive compensation methods of voltage constraint and line loss optimization |
| CN110427631A (en) * | 2019-03-27 | 2019-11-08 | 贵州电网有限责任公司 | Major network route needed for theoretical line loss caluclation and the dual check method of transformer parameter |
| CN110880760A (en) * | 2019-11-29 | 2020-03-13 | 国网辽宁省电力有限公司葫芦岛供电公司 | Low-voltage distribution network line loss and reactive compensation collaborative optimization method |
| CN110910026A (en) * | 2019-11-28 | 2020-03-24 | 国家电网有限公司 | Intelligent management and decision-making method and system for route loss of trans-provincial power transmission line |
| CN112183971A (en) * | 2020-09-15 | 2021-01-05 | 南方电网能源发展研究院有限责任公司 | Energy-saving distribution processing method, device, medium and terminal equipment |
| CN112583025A (en) * | 2020-12-15 | 2021-03-30 | 中国科学院电工研究所 | Optimal configuration method, device and medium for reactive compensation equipment of power distribution system |
| CN112884228A (en) * | 2021-02-25 | 2021-06-01 | 国网山东省电力公司胶州市供电公司 | Big data-based transformer area line loss management and control system |
| CN114050567A (en) * | 2021-10-25 | 2022-02-15 | 深圳供电局有限公司 | Reactive power determination method and device for current collection line and computer equipment |
| CN114139957A (en) * | 2021-12-01 | 2022-03-04 | 东南大学 | XGboost algorithm-based rural transformer area voltage and line loss influence evaluation method |
| CN114172165A (en) * | 2021-12-06 | 2022-03-11 | 国网浙江省电力有限公司舟山供电公司 | Power distribution network loss reduction method based on SVG (scalable vector graphics) configured in cable-in-place scene |
| CN115207939A (en) * | 2022-09-13 | 2022-10-18 | 广东电网有限责任公司湛江供电局 | Power compensation method and device for line |
| CN115201742A (en) * | 2022-09-16 | 2022-10-18 | 北京志翔科技股份有限公司 | Method for determining error of metering point of low-voltage transformer area |
| CN116151690A (en) * | 2023-04-04 | 2023-05-23 | 佰聆数据股份有限公司 | Loss reduction effect evaluation method and device for reactive power optimization of station domain |
| CN116384212A (en) * | 2022-12-16 | 2023-07-04 | 国网江苏省电力有限公司电力科学研究院 | Collaborative loss reduction method for DG-containing area, computer equipment and storage medium |
| CN116826774A (en) * | 2023-06-29 | 2023-09-29 | 国网江苏省电力有限公司泰州供电分公司 | Method for improving voltage drop of long line of rural power grid area |
| CN116979552A (en) * | 2023-06-30 | 2023-10-31 | 国网江苏省电力有限公司泰州供电分公司 | Compensation method for line loss of transformer area based on fixed number capacitance compensation point position selection |
| CN117277446A (en) * | 2023-11-23 | 2023-12-22 | 浙江优能电力设计有限公司 | Multi-target power distribution network planning method and system |
| CN116979552B (en) * | 2023-06-30 | 2024-05-03 | 国网江苏省电力有限公司泰州供电分公司 | Compensation method for line loss of transformer area based on fixed number capacitance compensation point position selection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972905A (en) * | 2014-04-28 | 2014-08-06 | 广州供电局有限公司 | Reactive compensation optimization method of 400V distribution network areas per transformer |
| CN104573853A (en) * | 2014-12-19 | 2015-04-29 | 华南理工大学 | Systematic solution for voltage quality evaluation and optimization of low-voltage transformer area distribution networks |
| RU2563250C1 (en) * | 2014-05-29 | 2015-09-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Марийский государственный университет" | Arrangement method of capacitor devices in 0,4 kv rural distribution networks |
| US20170133851A1 (en) * | 2015-11-06 | 2017-05-11 | Tsinghua University | Method and device for controlling active distribution network |
-
2018
- 2018-01-09 CN CN201810019375.0A patent/CN108280539B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972905A (en) * | 2014-04-28 | 2014-08-06 | 广州供电局有限公司 | Reactive compensation optimization method of 400V distribution network areas per transformer |
| RU2563250C1 (en) * | 2014-05-29 | 2015-09-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Марийский государственный университет" | Arrangement method of capacitor devices in 0,4 kv rural distribution networks |
| CN104573853A (en) * | 2014-12-19 | 2015-04-29 | 华南理工大学 | Systematic solution for voltage quality evaluation and optimization of low-voltage transformer area distribution networks |
| US20170133851A1 (en) * | 2015-11-06 | 2017-05-11 | Tsinghua University | Method and device for controlling active distribution network |
Non-Patent Citations (2)
| Title |
|---|
| 刘广利: "低压无功补偿技术在配电网降损中的应用", 《农业机械化与电气化》 * |
| 王斌: "无功补偿在低压台区降损中的应用", 《科技创业家》 * |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109389315A (en) * | 2018-10-19 | 2019-02-26 | 东北大学 | A kind of rural power grids typical case platform area decreasing loss method |
| CN109462232A (en) * | 2018-11-21 | 2019-03-12 | 国网浙江省电力公司湖州供电公司 | A kind of energy conservation optimizing method of power distribution network |
| CN109936148A (en) * | 2019-01-22 | 2019-06-25 | 国网浙江省电力有限公司电力科学研究院 | A kind of measurement method and on-line monitoring system of generating set reactive-current compensation rate |
| CN110427631A (en) * | 2019-03-27 | 2019-11-08 | 贵州电网有限责任公司 | Major network route needed for theoretical line loss caluclation and the dual check method of transformer parameter |
| CN110427631B (en) * | 2019-03-27 | 2023-03-10 | 贵州电网有限责任公司 | Double checking method for main network line and transformer parameters required by theoretical line loss calculation |
| CN110401204B (en) * | 2019-08-06 | 2024-01-12 | 竺炜 | 10KV overhead line single-point reactive power compensation method with optimized voltage constraint and line loss |
| CN110401204A (en) * | 2019-08-06 | 2019-11-01 | 竺炜 | 10 kilovolts of overhead line single-point reactive compensation methods of voltage constraint and line loss optimization |
| CN110910026B (en) * | 2019-11-28 | 2023-06-27 | 国家电网有限公司 | Cross-provincial power transmission line loss intelligent management and decision method and system |
| CN110910026A (en) * | 2019-11-28 | 2020-03-24 | 国家电网有限公司 | Intelligent management and decision-making method and system for route loss of trans-provincial power transmission line |
| CN110880760A (en) * | 2019-11-29 | 2020-03-13 | 国网辽宁省电力有限公司葫芦岛供电公司 | Low-voltage distribution network line loss and reactive compensation collaborative optimization method |
| CN112183971A (en) * | 2020-09-15 | 2021-01-05 | 南方电网能源发展研究院有限责任公司 | Energy-saving distribution processing method, device, medium and terminal equipment |
| CN112183971B (en) * | 2020-09-15 | 2023-05-23 | 南方电网能源发展研究院有限责任公司 | Energy-saving distribution processing method and device, medium and terminal equipment |
| CN112583025A (en) * | 2020-12-15 | 2021-03-30 | 中国科学院电工研究所 | Optimal configuration method, device and medium for reactive compensation equipment of power distribution system |
| CN112583025B (en) * | 2020-12-15 | 2022-07-15 | 中国科学院电工研究所 | Optimal configuration method, device and medium for reactive compensation equipment of power distribution system |
| CN112884228A (en) * | 2021-02-25 | 2021-06-01 | 国网山东省电力公司胶州市供电公司 | Big data-based transformer area line loss management and control system |
| CN112884228B (en) * | 2021-02-25 | 2022-07-29 | 国网山东省电力公司胶州市供电公司 | Big data-based transformer area line loss management and control system |
| CN114050567B (en) * | 2021-10-25 | 2023-08-25 | 深圳供电局有限公司 | Reactive power determination method and device for current collection line and computer equipment |
| CN114050567A (en) * | 2021-10-25 | 2022-02-15 | 深圳供电局有限公司 | Reactive power determination method and device for current collection line and computer equipment |
| CN114139957A (en) * | 2021-12-01 | 2022-03-04 | 东南大学 | XGboost algorithm-based rural transformer area voltage and line loss influence evaluation method |
| CN114139957B (en) * | 2021-12-01 | 2024-03-29 | 东南大学 | Evaluation method for rural area transformer area voltage and line loss influence based on XGBoost algorithm |
| CN114172165A (en) * | 2021-12-06 | 2022-03-11 | 国网浙江省电力有限公司舟山供电公司 | Power distribution network loss reduction method based on SVG (scalable vector graphics) configured in cable-in-place scene |
| CN114172165B (en) * | 2021-12-06 | 2023-10-20 | 国网浙江省电力有限公司舟山供电公司 | Power distribution network loss reduction method based on SVG configuration under cable ground scene |
| CN115207939A (en) * | 2022-09-13 | 2022-10-18 | 广东电网有限责任公司湛江供电局 | Power compensation method and device for line |
| CN115207939B (en) * | 2022-09-13 | 2023-01-13 | 广东电网有限责任公司湛江供电局 | Power compensation method and device for line |
| CN115201742A (en) * | 2022-09-16 | 2022-10-18 | 北京志翔科技股份有限公司 | Method for determining error of metering point of low-voltage transformer area |
| CN116384212A (en) * | 2022-12-16 | 2023-07-04 | 国网江苏省电力有限公司电力科学研究院 | Collaborative loss reduction method for DG-containing area, computer equipment and storage medium |
| CN116384212B (en) * | 2022-12-16 | 2023-12-05 | 国网江苏省电力有限公司电力科学研究院 | Collaborative loss reduction method for DG-containing area, computer equipment and storage medium |
| CN116151690A (en) * | 2023-04-04 | 2023-05-23 | 佰聆数据股份有限公司 | Loss reduction effect evaluation method and device for reactive power optimization of station domain |
| CN116151690B (en) * | 2023-04-04 | 2023-07-07 | 佰聆数据股份有限公司 | Loss reduction effect evaluation method and device for reactive power optimization of station domain |
| CN116826774A (en) * | 2023-06-29 | 2023-09-29 | 国网江苏省电力有限公司泰州供电分公司 | Method for improving voltage drop of long line of rural power grid area |
| CN116826774B (en) * | 2023-06-29 | 2024-02-20 | 国网江苏省电力有限公司泰州供电分公司 | Method for improving voltage drop of long line of rural power grid area |
| CN116979552A (en) * | 2023-06-30 | 2023-10-31 | 国网江苏省电力有限公司泰州供电分公司 | Compensation method for line loss of transformer area based on fixed number capacitance compensation point position selection |
| CN116979552B (en) * | 2023-06-30 | 2024-05-03 | 国网江苏省电力有限公司泰州供电分公司 | Compensation method for line loss of transformer area based on fixed number capacitance compensation point position selection |
| CN117277446A (en) * | 2023-11-23 | 2023-12-22 | 浙江优能电力设计有限公司 | Multi-target power distribution network planning method and system |
| CN117277446B (en) * | 2023-11-23 | 2024-03-29 | 浙江优能电力设计有限公司 | Multi-target power distribution network planning method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108280539B (en) | 2021-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108280539A (en) | The drops such as the reactive-load compensation based on rural power grids typical case's taiwan area line loss calculation damage optimization method | |
| Kalambe et al. | Loss minimization techniques used in distribution network: bibliographical survey | |
| Khan et al. | Implementation of Distributed Generation (IDG) algorithm for performance enhancement of distribution feeder under extreme load growth | |
| KR101132107B1 (en) | System for controlling voltage and reactive power in electric power system connected with distributed generation and method for the same | |
| CN105574238B (en) | A kind of section real power control analysis of strategies method for the assessment of online stability margin | |
| Jordehi | Optimal allocation of FACTS devices for static security enhancement in power systems via imperialistic competitive algorithm (ICA) | |
| US20120022713A1 (en) | Power Flow Simulation System, Method and Device | |
| Castro et al. | Optimal voltage control in distribution network in the presence of DGs | |
| CN105046584B (en) | A kind of calculation method of the ideal line loss per unit based on K-MEANS algorithm | |
| CN105096207B (en) | Important power user power supply reliability assessment method based on analytic hierarchy process | |
| CN110707706B (en) | Power transmission network planning method and system based on line power flow distribution | |
| CN106779277A (en) | The classification appraisal procedure and device of a kind of distribution network loss | |
| CN108520362A (en) | A kind of integrated evaluating method of rural area intelligent grid level | |
| CN107834549A (en) | A kind of regional distribution network drop damage potential evaluation method | |
| CN108573330A (en) | Damage method and device drop in power distribution network | |
| CN113269371A (en) | Method and system for evaluating comprehensive performance of power supply of intelligent power distribution network | |
| CN109390953A (en) | Low-voltage network reactive voltage control method for coordinating and system containing distributed generation resource and electric car | |
| CN106339830A (en) | Line loss factor control method based on power grid information data platform | |
| CN109193683A (en) | Substation's inductive reactive power abundant intensity evaluation method based on line charge ratio | |
| Singh et al. | A smart volt-var optimization engine for energy distribution system | |
| Zhao et al. | Reactive power optimization considering dynamic reactive power reserves | |
| Casolino et al. | A voltage optimization tool for smart distribution grids with distributed energy resources | |
| Sakthivel et al. | Particle Swarm Optimization algorithm for voltage stability enhancement by optimal reactive power reserve management with multiple TCSCs | |
| Mady | Optimal sizing of capacitor banks and distributed generation in distorted distribution networks by genetic algorithms | |
| Wang et al. | Decentralized and multi-objective coordinated optimization of hybrid AC/DC flexible distribution networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Jia Inventor after: Liu Xinrui Inventor after: Cheng Xuke Inventor after: Sun Qiuye Inventor after: Wang Chao Inventor after: Yan Licheng Inventor after: Zhang Huaguang Inventor after: Huang Bonan Inventor after: Chen Yanhong Inventor before: Yu Jia Inventor before: Liu Xinrui Inventor before: Cheng Xuke Inventor before: Sun Qiuye Inventor before: Wang Chao Inventor before: Yan Licheng Inventor before: Zhang Huaguang Inventor before: Huang Bonan Inventor before: Chen Yanhong |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |