CN106655268A - Comprehensive benefit analysis method and device for distributed photovoltaic access - Google Patents
Comprehensive benefit analysis method and device for distributed photovoltaic access Download PDFInfo
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Abstract
The invention provides a comprehensive benefit analysis method and device for distributed photovoltaic access. The method comprises the steps of determining a power distribution parameter after distributed photovoltaic power distribution network access according to planning information of the distributed photovoltaic power distribution network access; calculating steady-state power flow one by one point in time within a preset time frame of the power distribution parameter, and determining electricity limiting quantity of each time point according to the steady-state power flow of each time point; judging whether the sum of electricity limiting quantities of all time points is larger than a preset value or not; calculating cost and benefit which are brought by the distributed photovoltaic power distribution network access when the sum of the electricity limiting quantities of all time points is smaller than or equal to the preset value; and determining comprehensive benefit of the distributed photovoltaic power distribution network access according to the cost and the benefit which are brought by the distributed photovoltaic the power distribution network access. By the method, the annual comprehensive benefit of the distributed photovoltaic the power distribution network access can be determined according to the planning information of the distributed photovoltaic the power distribution network access and annual 8,760-hour network running state, so that a scientific basis can be provided for distributed photovoltaic optimization and planning.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of comprehensive benefit analysis method that accesses of distributed photovoltaic and
Device.
Background technology
With the development of national economy, electricity needs is increased rapidly, and people are reliable to the concern of environmental problem and to power supply
Property requirement improve constantly.Distributed photovoltaic accesses nearby, directly advantageously reduces transmission ＆ distribution electrical loss, delays electricity to customer power supply
Net invests, improves power supply reliability, promotes economic development and energy-saving and emission-reduction, with good economic and social benefit.
But, distributed photovoltaic development ＆ construction need larger initial outlay, while high permeability accesses electrical network being likely to
Bring electric network reconstruction cost and loss etc. of rationing the power supply.Therefore, need a kind of comprehensive assessment distributed photovoltaic of being capable of badly and access power distribution network
The method of comprehensive benefit, so that the comprehensive benefit that distributed photovoltaic accesses power distribution network can be provided for distributed photovoltaic optimization planning
Scientific basis.
The content of the invention
In view of this, the invention provides a kind of comprehensive benefit analysis method and device of distributed photovoltaic access, method
Including：
The planning information of power distribution network is accessed based on distributed photovoltaic, determines that the distributed photovoltaic is accessed after the power distribution network
With electrical quantity；
Steady-state load flow is calculated by time point in preset time period with electrical quantity based on described, and based on each time point
Steady-state load flow determines the amount of rationing the power supply of each time point, and the time interval of adjacent time point is identical in the preset time period；
Judge the amount of the rationing the power supply summation of all time points whether more than preset value；
When the amount of the rationing the power supply summation of all time points is less than or equal to the preset value, the distributed photovoltaic is calculated
Access the costs and benefits that the power distribution network is brought；
The cost for accessing power distribution network based on the distributed photovoltaic and the income brought determine that the distributed photovoltaic connects
Enter the comprehensive benefit of the power distribution network.
Methods described also includes：
When the amount of the rationing the power supply summation of all time points is more than the preset value, the transformation plan of the power distribution network is determined
Slightly, and based on the Reconstruc-tion policy adjust the power distribution network with electrical quantity, be then back to described exist with electrical quantity based on described
The step for steady-state load flow being calculated in preset time period by time point.
Wherein, the income for calculating the distributed photovoltaic cost for accessing the power distribution network and being brought includes：
Calculate initial investment cost, electric network reconstruction cost, maintenance cost that the distributed photovoltaic accesses the power distribution network
The initial investment cost, the electric network reconstruction cost, the maintenance cost and the loss of rationing the power supply are lost and calculate with rationing the power supply
And access the cost of the power distribution network as the distributed photovoltaic；
Calculate the distributed photovoltaic and access the expection that the power distribution network brought and sell electric income, delay system investments to receive
Benefit, reduction system loss income, energy-saving benefit, environmental gain, expection are sold electric income and reliability benefits, and calculate the expection
Sell electric income, it is described delay system investments income, the reduction system loss income, the energy-saving benefit, the environmental gain,
It is that electric income and the reliability benefits are sold in the expection and access what the power distribution network was brought as the distributed photovoltaic
Income.
Wherein, the steady-state load flow based on each time point determines the amount of rationing the power supply of each time point, including：
The power supply parameter of each time point is determined based on the steady-state load flow of each time point；
Whether the power supply parameter of each time point is judged beyond default power supply value, and in the power supply parameter beyond described pre-
If during power supply value, being rationed the power supply by default strategy of rationing the power supply；
Obtain ration the power supply amount of the power supply parameter beyond the time point of default power supply value.
Wherein, it is described to calculate steady-state load flow by time point in preset time period with electrical quantity based on described, including：
Steady-state load flow was calculated based on described by hour within 8760 hours years with electrical quantity.
A kind of comprehensive benefit analysis device that distributed photovoltaic is accessed, described device includes：It is distribution parameter determination module, steady
State Load flow calculation module, the amount of rationing the power supply determining module, judge module, costs and benefits computing module, comprehensive benefit computing module；
The distribution parameter determination module, for accessing the planning information of power distribution network based on distributed photovoltaic, it is determined that described
Distributed photovoltaic access after the power distribution network with electrical quantity；
The steady parameter module, for calculating steady by time point in preset time period with electrical quantity based on described
State trend；
The amount of the rationing the power supply determining module, for the steady-state load flow based on each time point rationing the power supply for each time point is determined
Amount, the time interval of adjacent time point is identical in the preset time period；
The judge module, for judging the amount of the rationing the power supply summation of all time points whether more than preset value；
The costs and benefits computing module, for when the amount of the rationing the power supply summation of all time points is less than or equal to described
During preset value, the cost that the distributed photovoltaic accesses the power distribution network and the income brought are calculated；
The comprehensive benefit computing module, for accessing cost and the receipts that power distribution network is brought based on the distributed photovoltaic
Benefit determines that the distributed photovoltaic accesses the comprehensive benefit of the power distribution network.
Described device also includes：
Reconstruc-tion policy determining module, for when the amount of the rationing the power supply summation of all time points be more than the preset value when, really
The Reconstruc-tion policy of the fixed power distribution network；
Distribution parameter adjustment module, with electrical quantity, is then touched for based on the Reconstruc-tion policy adjustment power distribution network
Send out distribution parameter determination module described and calculate steady-state load flow by time point in preset time period with electrical quantity based on new.
Wherein, the costs and benefits computing module includes：Cost calculation submodule and income calculation submodule；
The cost calculation submodule, for calculate the distributed photovoltaic access the initial investment of the power distribution network into
Sheet, electric network reconstruction cost, maintenance cost and ration the power supply and lose and calculate the initial investment cost, the electric network reconstruction cost, institute
State maintenance cost and the loss of rationing the power supply and access the cost of the power distribution network as the distributed photovoltaic；
The income calculation submodule, it is pre- for calculate that the distributed photovoltaic accesses that the power distribution network brought
Phase sell electric income, delay system investments income, reduce system loss income, energy-saving benefit, environmental gain, expection sell electric income and
Reliability benefits, and delay system investments income, the reduction system loss income, the energy-saving benefit, described described in calculating
It is that environmental gain, the expection sell electric income and the reliability benefits and access the power distribution network as the distributed photovoltaic
The income brought.
Wherein, the amount of the rationing the power supply determining module includes：Power supply parameter calculating sub module, judging submodule, submodule of rationing the power supply
And acquisition submodule；
The power supply parameter calculating sub module, for determining the confession of each time point based on the steady-state load flow of each time point
Electrical quantity；
The judging submodule, for judging the power supply parameter of each time point whether beyond default power supply value；
The submodule of rationing the power supply, for when the power supply parameter exceeds the default power supply value, by default plan of rationing the power supply
Slightly rationed the power supply；
The acquisition submodule, for obtaining ration the power supply amount of the power supply parameter beyond the time point of default power supply value.
Wherein, the steady parameter module, specifically for based on it is described with electrical quantity year 8760 hours in by
Hour calculates steady-state load flow.
Above-mentioned technical proposal has the advantages that：
The comprehensive benefit analysis method and device that the distributed photovoltaic that the present invention is provided is accessed, can be based on distributed photovoltaic
Access the planning information of power distribution network, determine distributed photovoltaic access after power distribution network with electrical quantity, and then based on existing with electrical quantity
Steady-state load flow is calculated by time point in preset time period, and the limit of each time point is determined based on the steady-state load flow of each time point
Electricity, when the amount of the rationing the power supply summation of all time points is less than or equal to preset value, calculates distributed photovoltaic and accesses power distribution network institute band
The costs and benefits for coming, are entered the costs and benefits brought based on distributed photovoltaic access power distribution network and determine that distributed photovoltaic is accessed
The comprehensive benefit of the power distribution network.As can be seen here, the present invention provide distributed photovoltaic access comprehensive benefit analysis method and
Device, the planning information that can be based on distributed photovoltaic access power distribution network determines that distributed photovoltaic accesses the comprehensive effect of power distribution network
Benefit, so as to provide scientific basis for distributed photovoltaic optimization planning.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is that a flow process of the comprehensive benefit analysis method that distributed photovoltaic provided in an embodiment of the present invention is accessed is illustrated
Figure；
Fig. 2 is that another flow process of the comprehensive benefit analysis method that distributed photovoltaic provided in an embodiment of the present invention is accessed is illustrated
Figure；
Fig. 3 is the structural representation of the comprehensive benefit analysis device that distributed photovoltaic provided in an embodiment of the present invention is accessed.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
A kind of comprehensive benefit analysis method that distributed photovoltaic is accessed is embodiments provided, Fig. 1 is referred to, is illustrated
The schematic flow sheet of the method, can include：
Step S101：The planning information of power distribution network is accessed based on distributed photovoltaic, determines that distributed photovoltaic is matched somebody with somebody described in accessing
After electrical network with electrical quantity.
Step S102：Steady-state load flow is calculated by time point in preset time period based on electrical quantity, and during based on each
Between the steady-state load flow put determine the amount of rationing the power supply of each time point.
Wherein, the time interval of adjacent time point is identical in preset time period.
Step S103：Judge the amount of the rationing the power supply summation of all time points whether more than preset value.
Step S104：When the amount of the rationing the power supply summation of all time points is less than or equal to preset value, calculates distributed photovoltaic and connect
Enter the costs and benefits that power distribution network is brought.
Step S105：The costs and benefits brought based on distributed photovoltaic access power distribution network determine that distributed photovoltaic is accessed
The comprehensive benefit of power distribution network.
The comprehensive benefit analysis method that distributed photovoltaic provided in an embodiment of the present invention is accessed, can be based on distributed photovoltaic
Access the planning information of power distribution network, determine distributed photovoltaic access after power distribution network with electrical quantity, and then based on existing with electrical quantity
Steady-state load flow is calculated by time point in preset time period, and the limit of each time point is determined based on the steady-state load flow of each time point
Electricity, when the amount of the rationing the power supply summation of all time points is less than or equal to preset value, calculates distributed photovoltaic and accesses power distribution network institute band
The costs and benefits for coming, are entered the costs and benefits brought based on distributed photovoltaic access power distribution network and determine that distributed photovoltaic is accessed
The comprehensive benefit of the power distribution network.As can be seen here, the comprehensive benefit analysis that distributed photovoltaic provided in an embodiment of the present invention is accessed
Method, the planning information that can be based on distributed photovoltaic access power distribution network determines that distributed photovoltaic accesses the comprehensive effect of power distribution network
Benefit, so as to provide scientific basis for distributed photovoltaic optimization planning.
Fig. 2 is referred to, the comprehensive benefit analysis method that distributed photovoltaic provided in an embodiment of the present invention is accessed is shown
Another schematic flow sheet, the method can include：
Step S201：The planning information of power distribution network is accessed based on distributed photovoltaic, determines that distributed photovoltaic accesses power distribution network
Afterwards with electrical quantity.
Wherein, distribution network parameters include technical parameter and economic parameters.Technical parameter can install including distributed photovoltaic
Capacity, the type of skill, power producing characteristics, distributed photovoltaic accesses the network parameters such as the network structure of electrical network, line transformer, uses
The distribution of family load and part throttle characteristics etc..Economic parameters can include user side and electrical network side joint net under plurality of access modes into
Originally, the price parameter of grid equipment, the tou power price of electricity of rationing the power supply, cost of implementation of various operation of power networks strategies etc..
Step S202：Steady-state load flow is calculated by time point in preset time period based on electrical quantity, and during based on each
Between the steady-state load flow put determine the amount of rationing the power supply of each time point.
Wherein, the time interval of adjacent time point is identical in preset time period.
In the present embodiment, it is contemplated that every cost benefit is relevant with electrical network year running status, then preset time period can
Think 8760 hours years, steady-state load flow can be calculated by hour within 8760 hours years based on electrical quantity.
Wherein, the amount of rationing the power supply of each time point is determined based on the steady-state load flow of each time point, including：Based on each time
The steady-state load flow of point determines the power supply parameter (such as the supply voltage and electric current of each node in power distribution network) of each time point；Judge
Whether the power supply parameter of each time point is beyond default power supply value, and it (can be country to exceed default power supply value in power supply parameter
Supply voltage and circuit conveying capacity that standard specifies) when, rationed the power supply by default strategy of rationing the power supply；Obtain power supply parameter to surpass
Go out the amount of rationing the power supply of the time point of default power supply value.
Step S203：Judge the amount of the rationing the power supply summation of all time points whether more than preset value.
Step S204a：When the amount of the rationing the power supply summation of all time points is less than or equal to preset value, calculates distributed photovoltaic and connect
Enter the costs and benefits that power distribution network is brought.
Step S204b：When the amount of the rationing the power supply summation of all time points is more than preset value, the Reconstruc-tion policy of power distribution network is determined,
And based on Reconstruc-tion policy adjust power distribution network with electrical quantity, using adjustment after with electrical quantity as new with electrical quantity, then return
Return step S202.
Step S205b：The costs and benefits brought based on distributed photovoltaic access power distribution network determine that distributed photovoltaic connects
Enter the comprehensive benefit of power distribution network.
The comprehensive benefit analysis method that the distributed photovoltaic that the present invention is provided is accessed, can be accessed based on distributed photovoltaic and be matched somebody with somebody
The planning information of electrical network, determine distributed photovoltaic access power distribution network after with electrical quantity, and then based on electrical quantity when default
Between calculate steady-state load flow by time point in section, and the amount of rationing the power supply of each time point is determined based on the steady-state load flow of each time point,
When all time points the amount of rationing the power supply summation be less than or equal to preset value when, calculate distributed photovoltaic access power distribution network brought into
Sheet and income, are entered the costs and benefits brought based on distributed photovoltaic access power distribution network and determine that distributed photovoltaic accesses power distribution network
Comprehensive benefit, and when the amount of the rationing the power supply summation of all time points is more than preset value, can adjust with electrical quantity, it is new so as to be based on
Distribution parameter determination power distribution network comprehensive benefit.As can be seen here, the comprehensive benefit that the distributed photovoltaic that the present invention is provided is accessed
Analysis method, the application can be based on the planning information and annual 8760 hours network operation shapes that distributed photovoltaic accesses power distribution network
State determine distributed photovoltaic access power distribution network annual comprehensive benefit, so as to for distributed photovoltaic optimization planning provide science according to
According to.
In any of the above-described embodiment, calculate distributed photovoltaic and access the costs and benefits that power distribution network is brought, including：Meter
Calculate initial investment cost, electric network reconstruction cost, maintenance cost and loss of rationing the power supply that distributed photovoltaic accesses power distribution network；Calculate distribution
The expection that formula photovoltaic access power distribution network is brought sells electric income, delays system investments income, reduces system loss income, energy-conservation effect
Electric income and reliability benefits are sold in benefit, environmental gain, expection.
Wherein, distributed photovoltaic accesses the initial investment cost of power distribution network based on installed capacity and unit installed capacity cost
It is calculated, specifically, initial investment cost CgCalculated by following formula：
In formula,For the unit installed capacity cost of distributed photovoltaic power generation i, PiFor the installation of distributed photovoltaic power generation i
Capacity, n is the quantity of distributed photovoltaic power generation.
Wherein, distributed photovoltaic access the electric network reconstruction cost that causes of power distribution network by need the length of the circuit of transformation with
And the unit length cost calculation of the circuit for needing to transform is obtained：
In formula,For the unit length cost of circuit i, LiFor the length of circuit i, RiRepresent whether circuit i needs to carry out
Transformation, if it need to transform be 1, do not transform then for 0, m be circuit in the network quantity.
Wherein, the maintenance cost of distributed photovoltaic access power distribution network is calculated according to capacity, the electrical network transformed
The maintenance cost of equipment is estimated according to the special ratios of improvement cost：
In formula,For the unit capacity maintenance cost of distributed photovoltaic i；PiFor the installed capacity of distributed photovoltaic i；Kr
For the proportionality coefficient that grid equipment maintenance cost accounts for improvement cost.
Wherein, ration the power supply amount and unit quantity of electricity value calculation of the loss of rationing the power supply of distributed photovoltaic based on Each point in time is obtained
Arrive, specifically, the loss of rationing the power supply of distributed photovoltaic is calculated by following formula：
In formula, Ei,tFor the amount of rationing the power supply of t distributed photovoltaic power generation i；CEFor the value of the unit amount of rationing the power supply.
Wherein, distributed photovoltaic access the reduction system loss income brought of power distribution network and grid structure and the method for operation,
The position of load condition and distributed photovoltaic, capacity and the method for operation etc. are closely related, it is assumed that the time period of analysis is defined as year
Degree 8760 hours, then reduce system loss income and calculated by following formula：
In formula, EbasislossIt is system basic loss when accessing without distributed photovoltaic；riFor the unit on i-th line road
Length impedance；liFor the unit length impedance on i-th line road；Ui,tFor i-th line road t voltage；Pi,tFor t stream
Cross the active of i-th line road；Qi,tThe idle of i-th line road is flow through for t；CEFor the value of unit loss of electricity, commensurate
The value of the amount of rationing the power supply.
Wherein, distributed photovoltaic accesses the lag in investment benefit of power distribution network based on network transformer after distributed photovoltaic access
Electric network source cost of investment needed for the reduced value and unit requirement of maximum demand is calculated, specifically, lag in investment benefit
Calculated by following formula：
Binv=(Pbasis-Pmax T)·Ckw (6)
In formula, PbasisIt is transformer maximum output power when accessing without distributed photovoltaic；Pmax TFor distributed photovoltaic
Transformer maximum output power after access；CkwElectric network source required for meet transformer unit output power is invested into
This.
Wherein, the coal consumption that the energy-saving benefit of distributed photovoltaic is reduced based on actual power generation and unit generated energy into
Originally it is calculated, specifically, the energy-saving benefit of distributed photovoltaic is calculated by following formula：
In formula, MkwhThe coal amount consumed by fossil-fired unit production unit electricity；CkwhFor the valency of unit coal amount
Lattice；N is the quantity of distributed photovoltaic；Ei,tFor the generated energy of t distributed photovoltaic i.
Wherein, the environmental benefit that distributed photovoltaic access power distribution network brings is based on species number, the every kind of dirt for discharging pollutants
The emission factor of dye thing and the processing cost coefficient of every kind of pollutant are calculated, and specifically, distributed photovoltaic is accessed and brought
Environmental benefit by following formula calculate：
In formula, X is category of pollutant discharge number；PokFor kth kind pollutant emission factor；ckFor pollutant process into
This coefficient.
Wherein, it is contemplated that sell the prospective earnings that electric income is primarily referred to as electricity produced by distributed power source, be one relative
Fixed value, with the difference of actual power generation loss of rationing the power supply is essentially consisted in, specifically with distributed power source generated energy and operation mode
Relevant, wherein operation mode is primarily referred to as all surfing the Net and pattern of generating power for their own use, and specifically, electric income is sold in the expection of online in full
For
In formula, CSPi、CBPiThe respectively rate for incorporation into the power network of t distributed photovoltaic i and subsidies granted for policy considerations electricity price.
Wherein, the reliability benefits that distributed photovoltaic access power distribution network brings refer to that distributed photovoltaic evades the power failure of user
Loss, can be calculated by following formula：
Bsecu=EPVC (10)
In formula, EPVIt is distributed photovoltaic power generation amount, C is electricity production ratio, refers to a certain stage, a certain regional GDP
(GDP) with the ratio of electric energy used, unit/kWh.
In the present embodiment, the overall economic efficiency that distributed photovoltaic is accessed is analyzed using net present value method, is based on
Initial investment cost Cg, distributed photovoltaic access the electric network reconstruction cost C that causesr, maintenance cost Com, ration the power supply loss Cc, delay be
System investment return Binv, reduce system loss income Bloss, energy-saving benefit Benergy, environmental gain Benviroment, expection sell electric income
BsellWith reliability benefits Bsecu, using following formula the comprehensive benefit that distributed photovoltaic is accessed is calculated：
Corresponding with said method, the embodiment of the present invention additionally provides the comprehensive benefit analysis that a kind of distributed photovoltaic is accessed
Device, refers to Fig. 3, shows the structural representation of the device, can include：Distribution parameter determination module 301, steady-state load flow
Computing module 302, the amount of rationing the power supply determining module 303, judge module 304, costs and benefits computing module 305 and comprehensive benefit are calculated
Module 306.Wherein：
Distribution parameter determination module 301, for being accessed the planning information of power distribution network based on distributed photovoltaic, is determined distributed
Photovoltaic access power distribution network after with electrical quantity.
Steady parameter module 302, for calculating stable state tide by time point in preset time period based on electrical quantity
Stream.
The amount of rationing the power supply determining module 303, for determining the amount of rationing the power supply of each time point based on the steady-state load flow of each time point,
The time interval of adjacent time point is identical in preset time period.
Judge module 304, for judging the amount of the rationing the power supply summation of all time points whether more than preset value.
Costs and benefits computing module 305, for when the amount of the rationing the power supply summation of all time points be less than or equal to preset value when,
Calculate the cost that distributed photovoltaic accesses power distribution network and the income brought.
Comprehensive benefit computing module 306, the costs and benefits for being brought based on distributed photovoltaic access power distribution network are true
Determine the comprehensive benefit that distributed photovoltaic accesses power distribution network.
The comprehensive benefit analysis device that distributed photovoltaic provided in an embodiment of the present invention is accessed, can be based on distributed photovoltaic
Access the planning information of power distribution network, determine distributed photovoltaic access after power distribution network with electrical quantity, and then based on existing with electrical quantity
Steady-state load flow is calculated by time point in preset time period, and the limit of each time point is determined based on the steady-state load flow of each time point
Electricity, when the amount of the rationing the power supply summation of all time points is less than or equal to preset value, calculates distributed photovoltaic and accesses power distribution network institute band
The costs and benefits for coming, are entered the costs and benefits brought based on distributed photovoltaic access power distribution network and determine that distributed photovoltaic is accessed
The comprehensive benefit of the power distribution network.As can be seen here, the comprehensive benefit analysis that distributed photovoltaic provided in an embodiment of the present invention is accessed
Device, the planning information that can be based on distributed photovoltaic access power distribution network determines that distributed photovoltaic accesses the comprehensive effect of power distribution network
Benefit, so as to provide scientific basis for distributed photovoltaic optimization planning.
The device that above-described embodiment is provided can also include：Reconstruc-tion policy determining module and distribution parameter adjustment module.Its
In：
Reconstruc-tion policy determining module, for when the amount of the rationing the power supply summation of all time points is more than preset value, determining power distribution network
Reconstruc-tion policy.
Distribution parameter adjustment module, with electrical quantity, distribution ginseng is then triggered for based on Reconstruc-tion policy adjustment power distribution network
Number determining module calculates steady-state load flow in preset time period with electrical quantity based on new by time point.
In the device that above-described embodiment is provided, costs and benefits computing module includes：Cost calculation submodule and income meter
Operator module.Wherein：
Cost calculation submodule, for calculate distributed photovoltaic access the initial investment cost of power distribution network, electric network reconstruction into
This, maintenance cost and ration the power supply lose and calculate initial investment cost, electric network reconstruction cost, maintenance cost and loss of rationing the power supply and make
For the cost that distributed photovoltaic accesses power distribution network.
Income calculation submodule, receives for calculating the system investments that delay that distributed photovoltaic access power distribution network is brought
Electric income and reliability benefits are sold in benefit, reduction system loss income, energy-saving benefit, environmental gain, expection, and calculating delays system
Investment return, reduce system loss income, energy-saving benefit, environmental gain, expection sell electric income and reliability benefits and conduct
Distributed photovoltaic accesses the income that power distribution network is brought.
In the device that above-described embodiment is provided, the amount of rationing the power supply determining module includes：Power supply parameter calculating sub module, judge submodule
Block, ration the power supply submodule and acquisition submodule.Wherein：
Power supply parameter calculating sub module, for determining the power supply ginseng of each time point based on the steady-state load flow of each time point
Number.
Judging submodule, for judging the power supply parameter of each time point whether beyond default power supply value.
Ration the power supply submodule, for when power supply parameter is beyond default power supply value, being rationed the power supply by default strategy of rationing the power supply.
Acquisition submodule, for obtaining ration the power supply amount of the power supply parameter beyond the time point of default power supply value.
In the device that above-described embodiment is provided, steady parameter module, specifically for being based on electrical quantity in year
Steady-state load flow is calculated in 8760 hours by hour.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
In several embodiments provided herein, it should be understood that disclosed method, device and equipment, can be with
Realize by another way.For example, device embodiment described above is only schematic, for example, the division of unit,
It is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can be with
With reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or discussed
Coupling each other or direct-coupling or communication connection can be indirect coupling by some communication interfaces, device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
Can be as the unit of separating component explanation or may not be physically separate, show as unit
Part can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple networks
On unit.Some or all of unit therein can according to the actual needs be selected to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, or each list
Unit is individually physically present, it is also possible to which two or more units are integrated in a unit.
If function is realized using in the form of SFU software functional unit and as independent production marketing or when using, can stored
In a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words to existing
There are part that technology contributes or the part of the technical scheme to embody in the form of software product, the computer
Software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be personal meter
Calculation machine, server, or network equipment etc.) perform all or part of step of each embodiment method of the invention.And it is aforesaid
Storage medium includes：USB flash disk, portable hard drive, read-only storage (ROM, Read-Only Memory), random access memory
(RAM, RandomAccess Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. a kind of comprehensive benefit analysis method that distributed photovoltaic is accessed, it is characterised in that methods described includes：
The planning information of power distribution network is accessed based on distributed photovoltaic, determines that the distributed photovoltaic accesses matching somebody with somebody after the power distribution network
Electrical quantity；
Steady-state load flow, and the stable state based on each time point are calculated based on described by time point in preset time period with electrical quantity
Trend determines the amount of rationing the power supply of each time point, and the time interval of adjacent time point is identical in the preset time period；
Judge the amount of the rationing the power supply summation of all time points whether more than preset value；
When the amount of the rationing the power supply summation of all time points is less than or equal to the preset value, calculates the distributed photovoltaic and access
The costs and benefits that the power distribution network is brought；
The cost for accessing power distribution network based on the distributed photovoltaic and the income brought determine that the distributed photovoltaic accesses institute
State the comprehensive benefit of power distribution network.
2. method according to claim 1, it is characterised in that methods described also includes：
When the amount of the rationing the power supply summation of all time points is more than the preset value, the Reconstruc-tion policy of the power distribution network is determined, and
Based on the Reconstruc-tion policy adjust the power distribution network with electrical quantity, be then back to it is described based on it is described with electrical quantity when default
Between the step for calculate steady-state load flow by time point in section.
3. the method stated according to claim 1, it is characterised in that the calculating distributed photovoltaic accesses the power distribution network
Cost and the income brought include：
Calculate initial investment cost, electric network reconstruction cost, maintenance cost and limit that the distributed photovoltaic accesses the power distribution network
Electric loss simultaneously calculates the sum of the initial investment cost, the electric network reconstruction cost, the maintenance cost and the loss of rationing the power supply
The cost of the power distribution network is accessed as the distributed photovoltaic；
Calculate that the distributed photovoltaic accesses that the power distribution network brought delays system investments income, reduces system loss and receive
Electric income and reliability benefits are sold in benefit, energy-saving benefit, environmental gain, expection, and delay system investments income, described described in calculating
Reduce system loss income, the energy-saving benefit, the environmental gain, the expection and sell electric income and the reliability benefits
The income that the power distribution network is brought is accessed with as the distributed photovoltaic.
4. method as claimed in any of claims 1 to 3, it is characterised in that described based on the steady of each time point
State trend determines the amount of rationing the power supply of each time point, including：
The power supply parameter of each time point is determined based on the steady-state load flow of each time point；
Whether the power supply parameter of each time point is judged beyond default power supply value, and exceed the default confession in the power supply parameter
During electricity value, rationed the power supply by default strategy of rationing the power supply；
Obtain ration the power supply amount of the power supply parameter beyond the time point of default power supply value.
5. method as claimed in any of claims 1 to 3, it is characterised in that described to be existed with electrical quantity based on described
Steady-state load flow is calculated by time point in preset time period, including：
Steady-state load flow was calculated based on described by hour within 8760 hours years with electrical quantity.
6. the comprehensive benefit analysis device that a kind of distributed photovoltaic is accessed, it is characterised in that described device includes：It is true with electrical quantity
Cover half block, steady parameter module, the amount of rationing the power supply determining module, judge module, costs and benefits computing module, comprehensive benefit meter
Calculate module；
The distribution parameter determination module, for accessing the planning information of power distribution network based on distributed photovoltaic, determines the distribution
Formula photovoltaic access after the power distribution network with electrical quantity；
The steady parameter module, for calculating stable state tide by time point in preset time period with electrical quantity based on described
Stream；
The amount of the rationing the power supply determining module, for determining the amount of rationing the power supply of each time point, institute based on the steady-state load flow of each time point
The time interval for stating adjacent time point in preset time period is identical；
The judge module, for judging the amount of the rationing the power supply summation of all time points whether more than preset value；
The costs and benefits computing module, for presetting less than or equal to described when the amount of the rationing the power supply summation of all time points
During value, the cost that the distributed photovoltaic accesses the power distribution network and the income brought are calculated；
The comprehensive benefit computing module, the costs and benefits for being brought based on distributed photovoltaic access power distribution network are true
The fixed distributed photovoltaic accesses the comprehensive benefit of the power distribution network.
7. device according to claim 6, it is characterised in that described device also includes：
Reconstruc-tion policy determining module, for when the amount of the rationing the power supply summation of all time points is more than the preset value, determining institute
State the Reconstruc-tion policy of power distribution network；
Distribution parameter adjustment module, with electrical quantity, institute is then triggered for based on the Reconstruc-tion policy adjustment power distribution network
State distribution parameter determination module and calculate steady-state load flow by time point in preset time period with electrical quantity based on new.
8. the device stated according to claim 6, it is characterised in that the costs and benefits computing module includes：Cost calculation
Module and income calculation submodule；
The cost calculation submodule, for calculating initial investment cost, electricity that the distributed photovoltaic accesses the power distribution network
Net improvement cost, maintenance cost and ration the power supply and lose and calculate the initial investment cost, the electric network reconstruction cost, the maintenance
Cost and the loss of rationing the power supply and access the cost of the power distribution network as the distributed photovoltaic；
The income calculation submodule, sells for calculating the expection that the distributed photovoltaic access power distribution network is brought
Electric income and reliability are sold in electric income, the system investments income that delays, reduction system loss income, energy-saving benefit, environmental gain, expection
Property income, and calculate described in delay system investments income, the reduction system loss income, the energy-saving benefit, the environment
It is that income, the expection sell electric income and the reliability benefits and access power distribution network institute band as the distributed photovoltaic
The income come.
9. the method according to any one in claim 6 to 8, it is characterised in that the amount of the rationing the power supply determining module includes：
Power supply parameter calculating sub module, judging submodule, ration the power supply submodule and acquisition submodule；
The power supply parameter calculating sub module, for determining the power supply ginseng of each time point based on the steady-state load flow of each time point
Number；
The judging submodule, for judging the power supply parameter of each time point whether beyond default power supply value；
The submodule of rationing the power supply, for when the power supply parameter exceeds the default power supply value, entering by default strategy of rationing the power supply
Row is rationed the power supply；
The acquisition submodule, for obtaining ration the power supply amount of the power supply parameter beyond the time point of default power supply value.
10. the method according to any one in claim 6 to 8, it is characterised in that the steady parameter module,
Specifically for calculating steady-state load flow by hour within 8760 hours years with electrical quantity based on described.
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| CN110783960A (en) * | 2019-12-05 | 2020-02-11 | 国网河南省电力公司南阳供电公司 | Distributed photovoltaic power generation disordered access method and device |
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