CN107844925A - Consider that electric automobile changes the active distribution network space truss project method of power mode - Google Patents
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Abstract
The present invention relates to a kind of active distribution network space truss project method for considering electric automobile and changing power mode, including：Obtain demand and the battery by bus of passenger changes electric demand statistical nature, considers that electric taxi changes electric demand, electric demand curve is changed in drafting；Using the demand response strategy of tou power price, under the guiding of tou power price project, battery is connected to the grid and participates in the power scheduling of power network, filled by height and low put acquisition profit, pass through dry run, actual battery electrical changing station charge-discharge power demand curve is obtained, can be with the load bus of two-way flow as a power in active distribution network；The object function of active distribution network space truss project is established, the minimum of comprehensive economic index of this object function including track investment, operation maintenance, network loss and carbon emission Environmental costs, decision variable is the binary variable for representing circuit running status；Optimization Solution.
Description
Technical field
The present invention relates to a kind of active distribution network space truss project method for considering to change power mode.
Background technology
Conventional electrical distribution net space truss project does not consider distributed power source and electric automobile [1], but because their application can be reduced
Use to fossil fuel, alleviating energy crisis, while carbon emission is reduced, so being developed rapidly.It is a large amount of distributed
The access of power supply, some problems, such as bi-directional current, uncertain, complexity increase etc., active distribution network are brought to power distribution network
Some effective solutions are proposed to distributed power source access and the expansion of access capacity.Energy is produced for distributed power source
It is uncertain and intermittent, active distribution network employs the flexible load based on Demand Side Response, enters row information with generating end
Exchange, effectively facilitate distributed power source access power distribution network.Electric taxi is the important component of flexible load, in government
Under support, electric taxi has captured one seat in public transport field.It is beautiful, in, Han Dengguo some cities
Establish complete electronic public transportation system.
Although electric taxi environmental pollution is less, because of distance travelled farther out, limited battery capacity is, it is necessary to frequently fill
Electricity.In addition, electric taxi driver tends to ride demand less time and closer to the distance, service preferably charging in passenger
Stand charging, easily concentrate charging, influence the stability and security of power distribution network.On the other hand, in active distribution network space truss project
In, most of technical schemes only consider the plug-in type charging strategy of electric automobile, and by way of electrical changing station is charged
Seldom refer to.
Bibliography
[1] Urban Medium Voltage Distribution Network frame optimization planning research [D] North China Electric Power University of the Li Lin based on particle cluster algorithm
(Hebei), 2007.
The content of the invention
It is an object of the invention to provide one kind can reduce system capacity loss, lift the active distribution network net of overall benefit
Frame planing method.The present invention considers that electric taxi changes the operation of electricity in battery electrical changing station in active distribution network space truss project
Pattern, electrical changing station power module is established, specify Optimization Solution after object function.Technical scheme is as follows：
A kind of active distribution network space truss project method for considering electric automobile and changing power mode, including：
(1) obtain demand and the battery by bus of passenger changes electric demand statistical nature, considers that electric taxi changes electricity and needed
Ask, electric demand curve is changed in drafting.
(2) use the demand response strategy of tou power price, under the guiding of tou power price project, battery is connected to the grid ginseng
With the power scheduling of power network, by height fill it is low put acquisition profit, by dry run, obtain actual battery electrical changing station discharge and recharge
Power demand curves, can be with the load bus of two-way flow as a power in active distribution network；
(3) establish the object function of active distribution network space truss project, this object function include track investment, operation maintenance,
The minimum of comprehensive economic index including network loss and carbon emission Environmental costs, decision variable are the two of expression circuit running status
System variable；
(4) Optimization Solution.
The present invention gives a kind of active distribution network space truss project method for considering electric automobile and changing power mode.With document
[1] contrast, it is contemplated that distributed power generation and battery electrical changing station power module, and contributed with scene analytic approach processing distributed power source
Uncertainty, take tou power price project guide user power utilization, make the active distribution network plan model of the present invention program, more paste
Nearly engineering practice.In addition, object function not only considers traditional economy cost, it is also contemplated that the economic expense of carbon tax is paid in the transmission that generates electricity
With so that program results has relatively low carbon emission, environmental benefit increase.In addition, sample calculation analysis uses four scheme comparisons
Form, the prominent active distribution network for considering distributed power source and battery electrical changing station plans the superiority of relatively conventional planning.
Brief description of the drawings
Fig. 1 is that electric changes in demand curve is changed in one day
Fig. 2 is power network electricity price change curve in one day
Fig. 3 is BSS artificial load curve
Fig. 4 is the 25 node systems grid structure figure to be selected of modification
Embodiment
Can benefit multiple Interest Main Bodies using the popularization for the electric taxi for changing power mode.User changes the more convenient province of electricity
When, Utilities Electric Co.'s power scheduling is simpler quick, and by participating in peak load regulation network, profit is more for electrical changing station operator.The present invention
Illustrated based on accompanying drawing to using battery to change the process of electric model in active distribution network space truss project.
Initially set up electric taxi and change electric demand curve.The demand by bus of passenger may occur in one day any
Between point, it is and relatively fewer with morning at dead of night.From some documents can be seen that passenger ride demand in 7a.m. to 12p.m. and
Approximate obey is uniformly distributed respectively between 0a.m. to 7a.m.Again because passenger ride demand distribution do not influence decision variable solution side
Method, it is assumed herein that passenger rides, demand is obeyed respectively is uniformly distributed.Correspondingly, change electric demand and have with respect to passenger's demand of riding and prolong
The slow time, it can be assumed that it obeys and is uniformly distributed respectively between 10a.m. to 3p.m. and 3a.m. to 10a.m, two periods
The ratio for changing electric demand can be by the ratio 5 of two period average value in document:2 represent, schematic diagram such as Fig. 1.
To increase the receiving capacity of regenerative resource, the present invention takes a kind of demand response strategy.Demand response is electric power
User adjusts electricity consumption behavior for response power system price or pumping signal, and it includes the classification based on price and based on excitation.
In the project based on tou power price, electricity price whole day is all fluctuating, and is three peak, flat section, low ebb ranks generally by this 24h points
Section.Because tou power price is easily implemented and is widely used, the present invention is analyzed under tou power price excitation and discussed.When tou power price is each
Between section electricity price set such as Fig. 2.Under tou power price excitation, battery electrical changing station operator is inclined to low rate period charging, high electricity price
Period discharges.Car owner's demand and reserve battery capacity are considered simultaneously, simulate electrical changing station load curve.
Under under the guiding of tou power price pattern, battery electrical changing station operator is inclined to the charging of low rate period, during high electricity price
Duan Fang electricity.In view of car owner's demand and reserve battery capacity, battery electrical changing station simulation load curve is as shown in Figure 3.
The object function F () that space truss project is taken in the present invention is to include feeder line investment, and operation and maintenance expenses are used, network loss and environment
Benefit, i.e., because of the carbon tax that Generation Side carbon emission is paid, total cost inside.
F=Ccap+Copr+Cemi
Wherein, CcapIt is that year value feeder line is invested, CoprIt is network losses and operation and maintenance expenses sum, CemiIt is it is expected carbon tax value.
Because distributed power source is clean energy resource, CemiMainly produced by Generation Side network loss and beyond the load of distributed power source generated energy.
The constraints of system includes restriction of current, the voltage that the number constraint, power-balance equation, circuit of circuit allow
Out-of-limit constraint, receiving end network constraint and the radiation of rack constraint.
In addition, the present invention chooses the optimization that discrete binary particle swarm algorithm [1] carries out space truss project to active distribution network
Solve, embodiment is illustrated based on Fig. 4 and table 1.
Sample calculation analysis is carried out for a 10kV distribution network plannings problem, comprising 25 nodes, 42 can extend branch road, electricity
Source point 1 (35/10.5kV transformer stations) is powered to the load buses of 24 (10/0.4kV transformer stations), initial rack such as Fig. 4 institutes
Show.Assuming that distributed power source is connected on node 10,13,20,21 and 25, each node at most connects 10, and battery electrical changing station is located at section
Point 2.The optimal solution of active distribution network space truss project depends on circuit running status.
This invention takes four kinds of schemes to be contrasted:
Cost optimization traditional I, not comprising active distribution network, demand response and carbon tax；
II, is counted and carbon tax is to the influence to planning；
III, considers the active distribution network space truss project of distributed power source and battery electrical changing station；
IV, considers the unified plan of distributed power source and battery electrical changing station demand response.
The program results of every kind of scheme is listed in table 1, then analyzes respective year value expense.
Compared with scheme I, the running cost of scheme II-IV, totle drilling cost and carbon tax are all reduced, consistent with expected results.
The totle drilling cost of scheme II and CO2Discharge reduces by 1.49% and 1.85% than scheme I respectively, but feeder line investment is but suppose
Case I high 64.01%, investment be not directly proportional to income.In scheme II, network loss accounts for very big proportion in object function, and this causes actively
The lower circuit of distribution network structure planning tendency selection via net loss, reduces network loss and carbon tax.
The totle drilling cost of scheme III and CO2Discharge reduces by 2.30% and 2.37% than scheme I respectively, access distributed power source, electricity
The economic benefit of system is further improved with Environmental Effect Yidu after the electrical changing station of pond.
Scheme IV considers distributed power source, battery electrical changing station and tou power price project, totle drilling cost and CO2Discharge is compared respectively
Scheme I reduces by 12.09% and 2.44%.Wherein, power purchase fee cut 12.58%, the very big proportion of cost cutting amount is accounted for.It is first
First, tou power price project implementation excitation customer charge valley power consumption, peak and load reduction usually so that power purchase expense drop
It is low.Secondly, be obtain maximum profit, battery electrical changing station operator on the premise of meeting that electric automobile taxi changes electric demand,
Battery is arranged to be charged usually with low ebb means as far as possible, in peak period to power network sale of electricity.Finally, the Demand-side based on electricity price rings
Distributed power source should be caused to give full play to its generating potentiality, avoid the late into the night, power extraction caused by morning load is underload, this causes
Distributed power source generated energy is more steady with customer charge, realizes peak load shifting.
In general, the solution of scheme IV has more superiority.
To sum up, space truss project because take the difference of programme result in planning effect difference, take distributed power source,
The system of electric taxi battery electrical changing station pattern and demand response scheme has more preferable environmental benefit and economic benefit, this card
Bright distributed power source, battery electrical changing station and demand response can be effectively reduced system power dissipation, lifting system overall efficiency,
Prominent active distribution network advantage, it is the weight for the workload demand and response social energy conservation emission reduction call for meeting that user side is growing
Want mode.
The different schemes program results of table 1 compares
Claims (1)
1. a kind of active distribution network space truss project method for considering electric automobile and changing power mode, including：
(1) obtain demand and the battery by bus of passenger changes electric demand statistical nature, considers that electric taxi changes electric demand, paints
System changes electric demand curve.
(2) use the demand response strategy of tou power price, under the guiding of tou power price project, battery is connected to the grid and participates in electricity
The power scheduling of net, by height fill it is low put acquisition profit, by dry run, obtain actual battery electrical changing station charge-discharge electric power
Demand curve, can be with the load bus of two-way flow as a power in active distribution network；
(3) object function of active distribution network space truss project is established, this object function includes track investment, operation maintenance, network loss
With the minimum of the comprehensive economic index including carbon emission Environmental costs, decision variable is the binary system for representing circuit running status
Variable；
(4) Optimization Solution.
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Cited By (4)
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| CN109583136A (en) * | 2018-12-28 | 2019-04-05 | 上海电力学院 | Electric car based on schedulable potentiality, which fills, changes storage one station method for establishing model |
| CN110991881A (en) * | 2019-11-29 | 2020-04-10 | 燕山大学 | Electric automobile battery replacement station and electric power company cooperative scheduling method and system |
| CN113326594A (en) * | 2021-05-28 | 2021-08-31 | 南京工程学院 | Electric automobile battery replacement station and power grid interaction method and system based on microscopic traffic simulation |
| CN114782215A (en) * | 2022-04-20 | 2022-07-22 | 华北电力大学 | Electricity-hydrogen energy hub planning method based on typical scene of shared parking lot |
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Cited By (8)
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| CN113326594A (en) * | 2021-05-28 | 2021-08-31 | 南京工程学院 | Electric automobile battery replacement station and power grid interaction method and system based on microscopic traffic simulation |
| CN113326594B (en) * | 2021-05-28 | 2023-08-01 | 南京工程学院 | Electric vehicle battery replacement station and power grid interaction method and system based on microscopic traffic simulation |
| CN114782215A (en) * | 2022-04-20 | 2022-07-22 | 华北电力大学 | Electricity-hydrogen energy hub planning method based on typical scene of shared parking lot |
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