CN109062862A - It is a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method - Google Patents
It is a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method Download PDFInfo
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- CN109062862A CN109062862A CN201810875709.4A CN201810875709A CN109062862A CN 109062862 A CN109062862 A CN 109062862A CN 201810875709 A CN201810875709 A CN 201810875709A CN 109062862 A CN109062862 A CN 109062862A
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- G06F17/10—Complex mathematical operations
Abstract
The invention discloses a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method, photovoltaic system annual earnings under different photovoltaic installations are quickly calculated without annual numerical simulation, negative exponent relational model when photovoltaic installation is greater than bearing power between building photovoltaic annual earnings and photovoltaic installation, and the parameter of its negative exponent model is calculated according to boundary condition, and then the photovoltaic direct-furnish electric equipment income of different installed capacitys is quickly calculated, provide to and guiding property optimal photovoltaic installation.
Description
Technical field
The present invention relates to photovoltaics to utilize technical field, quickly counts more particularly to a kind of without storage photovoltaic direct-furnish electric equipment income
Calculation method.
Background technique
With the progress of photovoltaic module technology, the distributed photovoltaic of low capacity is used widely.Without energy storage, direct supply type
Photo-voltaic power supply is installed in the electricity utilization sites such as street lamp, the unit steel tower bracket of communication base station and data center computer room roof, matches with power grid
Conjunction is commonly fed power termination.Reach using photovoltaic energy, subtract so that photovoltaic energy preferentially uses by control photovoltaic system
The effect of few carbon emission.
To reach optimum economic benefit, it need to be equipped with suitable photovoltaic apparatus capacity for load, and according to annual utilization hours
Photovoltaic earnings estimates method be only applicable to be equipped with energy storage or installation is less than or equal to the photovoltaic system of load.When photovoltaic installation is big
When load, since system does not install energy storage, it is likely to occur when photovoltaic generates electricity in full amount since photovoltaic generation power is beyond load
Power and the phenomenon for abandoning light directly carry out estimating that its photovoltaic annual earnings will be bigger than normal using annual utilization hours.
Traditional income calculation method directly carries out simulation calculation to daily photovoltaic income using 365 days 1 year illumination curves
And be superimposed, it faces computationally intensive, photometric data and is difficult to the problems such as obtaining, be unfavorable for field engineering application.
Summary of the invention
The invention mainly solves the technical problem of providing it is a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method,
The photovoltaic direct-furnish electric equipment income of different installed capacitys is quickly calculated, optimal photovoltaic installation is provided to and guiding property.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: it provides a kind of without storage photovoltaic direct power supply
Equipment income quick calculation method, comprising the following steps:
A, photovoltaic annual earnings when photovoltaic installation being less than or equal to bearing power are expressed as form shown in formula (1):
IPV=pPVTPVcG,pPV≤PL (1)
Wherein, IPVFor photovoltaic annual earnings, pPVFor photovoltaic installation, TPVTo install photovoltaic system locality photovoltaic annual utilization hours
Number, cGFor constant alternating current price, PLFor bearing power；
B, photovoltaic system cost is expressed as form shown in formula (2):
Wherein,It is monovalent for photovoltaic silicon member,For bracket cost unit price,For construction cost,For photovoltaic system
Cost；
C, when photovoltaic installation is greater than bearing power, the relationship of photovoltaic annual earnings and photovoltaic installation is built as shown in formula (3)
Form:
Wherein, parameter is calculated according to formula (4)~(6):
a3=PLTsuncG (4)
Wherein TsunFor year maximum sunshine hour number；
D, so far, photovoltaic annual earnings and photovoltaic installation can be collectively expressed as shown in formula (7):
If setting photovoltaic apparatus planned life as t, filled at this time to obtain the corresponding optimal photovoltaic of accumulative maximum net profit
Machine is shown in formula (8):
Wherein,For optimal photovoltaic installed capacity at this time.
In a preferred embodiment of the present invention, wherein a1< 0, a2< 0, a3> 0 is negative exponential model parameter.
In a preferred embodiment of the present invention, the Tsun is constant 4380.
The beneficial effects of the present invention are: the present invention point out it is a kind of without the quick side of calculating of storage photovoltaic direct-furnish electric equipment income
Method can quickly calculate photovoltaic system annual earnings under different photovoltaic installations without annual numerical simulation,
Negative exponent relational model when photovoltaic installation is greater than bearing power between building photovoltaic annual earnings and photovoltaic installation, and according to boundary
Condition calculates the parameter of its negative exponent model, and then is quickly counted to the photovoltaic direct-furnish electric equipment income of different installed capacitys
It calculates, provides to and guiding property optimal photovoltaic installation.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The embodiment of the present invention includes:
It is a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method, comprising the following steps:
A, photovoltaic annual earnings when photovoltaic installation being less than or equal to bearing power are expressed as form shown in formula (1):
IPV=pPVTPVcG,pPV≤PL (1)
Wherein, IPVFor photovoltaic annual earnings, pPVFor photovoltaic installation, TPVTo install photovoltaic system locality photovoltaic annual utilization hours
Number, cGFor constant alternating current price, PLFor bearing power；
B, photovoltaic system cost is expressed as form shown in formula (2):
Wherein,It is monovalent for photovoltaic silicon member,For bracket cost unit price,For construction cost,For photovoltaic system
Cost；
C, when photovoltaic installation is greater than bearing power, the relationship of photovoltaic annual earnings and photovoltaic installation is built as shown in formula (3)
Form:
Wherein, a1< 0, a2< 0, a3> 0 is negative exponential model parameter, and parameter is calculated according to formula (4)~(6):
a3=PLTsuncG (4)
Wherein TsunFor year maximum sunshine hour number, the Tsun is constant 4380；
D, so far, photovoltaic annual earnings and photovoltaic installation can be collectively expressed as shown in formula (7):
If setting photovoltaic apparatus planned life as t, filled at this time to obtain the corresponding optimal photovoltaic of accumulative maximum net profit
Machine is shown in formula (8):
Wherein,For optimal photovoltaic installed capacity at this time.
By taking Nanjing as an example:
If photovoltaic silicon member unit price
Bracket cost unit price
Construction cost
Alternating current price cG=0.88 (member/degree)；
Bearing power PL=3 (kilowatts)；
The photovoltaic annual utilization hours T in the Nanjing found from " China's more ground photovoltaic utilizes hourage standard "PV=
1069.8 (hours) then can calculate a according to formula (4)~(6)3=1.156 (ten thousand yuan), a2=-0.1078 (1/ kilowatt), a1
=-1.2071 (ten thousand yuan)；
The relationship of photovoltaic annual earnings and photovoltaic installation can be then write out according to formula (7) are as follows:
Wherein photovoltaic installation pPVUnit be kilowatt, photovoltaic annual earnings IPVUnit be ten thousand yuan；
If photovoltaic apparatus planned life t=10, then it is calculated as obtaining accumulative maximum net profit pair according to formula (8) at this time
The optimal photovoltaic installation answered are as follows:
Unit be kilowatt.
In conclusion the present invention point out it is a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method, reduce meter
Complexity is calculated, the photovoltaic direct-furnish electric equipment income of different installed capacitys is quickly calculated, is provided to and guiding property optimal
Photovoltaic installation, improves the working efficiency of photovoltaic installation.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (3)
1. a kind of without storage photovoltaic direct-furnish electric equipment income quick calculation method, which comprises the following steps:
A, photovoltaic annual earnings when photovoltaic installation being less than or equal to bearing power are expressed as form shown in formula (1):
IPV=pPVTPVcG,pPV≤PL (1)
Wherein, IPVFor photovoltaic annual earnings, pPVFor photovoltaic installation, TPVTo install photovoltaic system locality photovoltaic annual utilization hours, cG
For constant alternating current price, PLFor bearing power；
B, photovoltaic system cost is expressed as form shown in formula (2):
Wherein,It is monovalent for photovoltaic silicon member,For bracket cost unit price,For construction cost,For photovoltaic system cost；
C, when photovoltaic installation is greater than bearing power, the relationship of photovoltaic annual earnings and photovoltaic installation is built as shape shown in formula (3)
Formula:
Wherein, parameter is calculated according to formula (4)-(6):
a3=PLTsuncG (4)
Wherein TsunFor year maximum sunshine hour number；
D, so far, photovoltaic annual earnings and photovoltaic installation can be collectively expressed as shown in formula (7):
It is at this time to obtain the corresponding optimal photovoltaic installation of accumulative maximum net profit to be if setting photovoltaic apparatus planned life as t
Shown in formula (8):
Wherein,For optimal photovoltaic installed capacity at this time.
2. according to claim 1 without storage photovoltaic direct-furnish electric equipment income quick calculation method, which is characterized in that wherein a1
< 0, a2< 0, a3> 0 is negative exponential model parameter.
3. according to claim 1 without storage photovoltaic direct-furnish electric equipment income quick calculation method, which is characterized in that described
TsunFor constant 4380.
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