CN105514987A - 10kV distribution circuit distributed photovoltaic constant volume method and system - Google Patents
10kV distribution circuit distributed photovoltaic constant volume method and system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to a 10kV distribution circuit distributed photovoltaic constant volume method and system. The method comprises: characteristic parameters of an object circuit is acquired; characteristic parameters of a corresponding ground state circuit are selected according to the type of the object circuit, the characteristic parameters of the object circuit are performed a per-unit process, and per-unit parameters are obtained; an end photovoltaic limiting capacity elimination proportion is acquired according to the per-unit parameters and a circuit end photovoltaic limiting capacity elimination proportion constant volume formula corresponding to the type of the object circuit; the end photovoltaic limiting capacity elimination proportion is corrected according to the distributed photovoltaic practical accessing position information of the object circuit and the type of the object circuit, so that a eliminable photovoltaic limiting capacity proportion of the is obtained; and the eliminable photovoltaic limiting capacity is obtained according to the distribution transformer total capacity of the object circuit and the eliminable photovoltaic limiting capacity proportion. The invention has guiding significance for a constant volume problem of distributed photovoltaic accessing power distribution network.
Description
Technical field
The present invention relates to the constant volume technical field of distributed power source access power distribution network, particularly relate to a kind of 10kV distribution line distributed photovoltaic constant volume method and system.
Background technology
Along with petering out and the enhancing gradually of social environment consciousness of fossil energy, new forms of energy are more and more active in the popular visual field as a kind of alternative energy source, and photovoltaic generation because its resource distribution is wide, pollute less, reproducible feature, receive the favor of people, be the wide a kind of regenerative resource of development prospect, become one of the highest new forms of energy of utilization rate at present.In electrical network, especially low and medium voltage distribution network, the ratio shared by photovoltaic generation rises rapidly.According to the up-to-date announcement of National Energy Board, only 2014 years, in Southern Power Grid Company business scope, newly-increased photovoltaic generation installation reaches 280,000 kilowatts, wherein photovoltaic plant 120,000 kilowatts, distributed 160,000 kilowatts, Jiangsu, Zhejiang and Guangdong cumulative distribution formula grid connection capacity are maximum, reach 700,000 kilowatts, 460,000 kilowatts and 440,000 kilowatts respectively.
But according to the correlation technique regulation that current distributed energy accesses, distributed power source total capacity is in principle no more than 25% of peak load in upper level transformer-supplied region.If strictly perform according to this technical stipulation, then the distributed photovoltaic capacity that current distribution line can be dissolved will be very limited.Because the policy that is ripe day by day and countries in the world of distributed photovoltaic technology is paid attention to and supports, too conservative technical stipulation cannot adapt to the trend that photovoltaic accesses electrical network on a large scale.
At present, the main method of distributed power source optimization planning research first carries out mathematical modeling to power distribution network, then according to different optimization aim, solved model by the Meta-heurist algorithm such as genetic algorithm, particle cluster algorithm.These methods will face modeling complexity in Practical Project, solve the predicament that difficulty even cannot solve.
Summary of the invention
Based on this, for solving the problems of the prior art, the invention provides a kind of 10kV distribution line distributed photovoltaic constant volume method and system, by gathering the characteristic parameter of 10kV distribution line, just accurately can obtain the dissolved photovoltaic power-carrying that this circuit meets voltage constraint.
For achieving the above object, the embodiment of the present invention is by the following technical solutions:
A kind of 10kV distribution line distributed photovoltaic constant volume method, comprises the steps:
Obtain the characteristic parameter of object circuit;
According to the characteristic parameter of ground state circuit corresponding to the type selecting of described object circuit, standardization is carried out to the characteristic parameter of described object circuit, obtain perunit value parameter;
Dissolve than constant volume formula according to described perunit value parameter and the line end photovoltaic power-carrying corresponding with the type of described object circuit, the end photovoltaic power-carrying obtaining described object circuit is dissolved ratio;
According to the actual accessing position information of distributed photovoltaic in described object circuit and the type of described object circuit, described end photovoltaic power-carrying being dissolved than revising, obtaining the dissolved photovoltaic power-carrying ratio of described object circuit;
According to distribution transformer total capacity and described the dissolved photovoltaic power-carrying of photovoltaic power-carrying than the described object circuit of acquisition of dissolving of described object circuit
And a kind of 10kV distribution line distributed photovoltaic constant volume system, comprising:
Characteristic parameter acquisition module, for obtaining the characteristic parameter of object circuit;
Standardization module, for the characteristic parameter according to ground state circuit corresponding to the type selecting of described object circuit, carries out standardization to the characteristic parameter of described object circuit, obtains perunit value parameter;
Dissolve than computing module, for dissolving than constant volume formula according to described perunit value parameter and the line end photovoltaic power-carrying corresponding with the type of described object circuit, the end photovoltaic power-carrying obtaining described object circuit is dissolved ratio;
Correcting module, for according to the actual accessing position information of distributed photovoltaic in described object circuit and the type of described object circuit, dissolving than revising to described end photovoltaic power-carrying, obtaining the dissolved photovoltaic power-carrying ratio of described object circuit;
Constant volume computing module, for according to the distribution transformer total capacity of described object circuit and described photovoltaic power-carrying of dissolving than the dissolved photovoltaic power-carrying obtaining described object circuit.
The present invention's reference based on typical ground state circuit, after the characteristic parameter obtaining object circuit, the accessible maximum distribution formula photovoltaic capacity of 10kV distribution line can be obtained exactly under the condition ensureing voltage security of operation, thus provide qualitative reference for the distributed photovoltaic configuration of circuit.Technical scheme provided by the invention is easy to implement, and the constant volume problem for distributed photovoltaic access power distribution network has directive significance.
Accompanying drawing explanation
Fig. 1 is 10kV distribution line distributed photovoltaic constant volume method of the present invention schematic flow sheet in one embodiment;
Fig. 2 is the 10kV distribution line model containing distributed photovoltaic through simplifying in the embodiment of the present invention;
Fig. 3 is the idiographic flow schematic diagram of 10kV distribution line distributed photovoltaic constant volume method of the present invention when implementing;
Fig. 4 is 10kV distribution line distributed photovoltaic constant volume system of the present invention structural representation in one embodiment.
Embodiment
Below in conjunction with preferred embodiment and accompanying drawing, content of the present invention is described in further detail.Obviously, hereafter described embodiment is only for explaining the present invention, but not limitation of the invention.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.It should be noted that for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Fig. 1 is 10kV distribution line distributed photovoltaic constant volume method of the present invention schematic flow sheet in one embodiment, and the 10kV distribution line distributed photovoltaic constant volume method of the present embodiment can be performed by software systems.As shown in Figure 1, the 10kV distribution line distributed photovoltaic constant volume method in the present embodiment comprises the following steps:
Step S110, obtains the characteristic parameter of object circuit;
Described object circuit refers to the circuit of distributed photovoltaic to be accessed, the characteristic parameter of object circuit can be used for the distributed photovoltaic constant volume of this object circuit, in the present embodiment, characteristic parameter comprises circuit beam length, backbone footpath area, transformer station 10kV busbar voltage, minimum load Rate of average load, line power factor and distribution transformer average size, carries out analytic explanation below.
Be through the 10kV distribution line model containing distributed photovoltaic of simplification shown in Fig. 2, comprise a 10kV transformer station, 10kV feeder line, a distributed photovoltaic power and a load bus.With 10kV substation bus bar for balance node, be P+jQ by the power of line transmission, line impedance is R+jX, and end load power is P
l+ jQ
l, exerting oneself as P of distributed photovoltaic
0+ jQ
0.
After distributed photovoltaic access, the power of line transmission is:
Ignore the horizontal component of voltage-drop, the voltage loss on circuit is:
In above formula, R, X are respectively resistance and the reactance of distribution line, V
0for 10kV substation bus bar voltage.
Line end voltage is the difference of 10kV substation bus bar voltage and line loss voltage, that is:
From above derivation, affect distribution line node voltage V because have:
V
0, be specifically the voltage magnitude of previous node, extend and can be regarded as 10kV substation bus bar voltage;
R and X, the i.e. impedance of distribution line, specifically comprise length and the wire diameter area of circuit;
P and Q, specifically again with P
l, Q
land P
0, Q
0relevant, at P
0, Q
0when for research variable, P and Q is embodied as load factor and power factor.
In addition because power load is generally connected with 10kV distribution line through distribution transformer, therefore the loss of distribution transformer also can affect circuit voltage's distribiuting because affecting transmission power.The loss of current distribution transformer is main relevant to capacity, and generally speaking, the distribution transformer loss that capacity is larger is less, and energy-saving effect is better, little then contrary of capacity.
Comprehensive above analysis is known, the capacity of the length of distribution line node voltage and circuit, wire diameter area, load factor, power factor, 10kV substation bus bar voltage and distribution transformer is relevant, therefore, in the present embodiment, for carrying out distributed photovoltaic constant volume to described object circuit, the characteristic parameter of object circuit is chosen to be the circuit beam length of object circuit, backbone footpath area, transformer station 10kV busbar voltage, minimum load Rate of average load, line power factor and distribution transformer average size.
Step S120, according to the characteristic parameter of ground state circuit corresponding to the type selecting of described object circuit, carries out standardization to the characteristic parameter of described object circuit, obtains perunit value parameter;
Consider that cities and towns circuit and rural line electric characteristic differ greatly, cities and towns circuit generally has the feature that cable line is many, wire diameter is large, radius of electricity supply is little, load is heavy and transformer capacity is larger; And rural line is overhead transmission line substantially, wire diameter is less, and radius of electricity supply is bigger than normal, and load is comparatively light and transformer capacity is less.Therefore the present embodiment will carry out Typical Route classification according to cities and towns cable line and rural area overhead transmission line, object circuit will be divided into cable line and these two types of overhead transmission line.
Standardization is Numerical Methods conventional in power system analysis and engineering calculation, in the present embodiment, select the ground state circuit corresponding with the type of object circuit, and using the characteristic parameter of ground state circuit as fiducial value, standardization is carried out to the characteristic parameter of object circuit, obtains perunit value parameter.The relative value of each physical quantity of perunit value Parametric Representation and parameter.
In the optional execution mode of one, if the type of object circuit is cable line, then the characteristic parameter of ground state circuit comprises:
Circuit beam length is 4.0 kms, and backbone footpath area is 240 square millimeters, and transformer station 10kV busbar voltage is 10.3 volts, and minimum load Rate of average load is 35%, and line power factor is 0.93, and distribution transformer average size is 630 kilovolt-amperes.
In the optional execution mode of another kind, if the type of object circuit is overhead transmission line, then the characteristic parameter of ground state circuit comprises:
Circuit beam length is 10.0 kms, and backbone footpath area is 185 square millimeters, and transformer station 10kV busbar voltage is 10.3 volts, and minimum load Rate of average load is 35%, and line power factor is 0.88, and distribution transformer average size is 200 kilovolt-amperes.
According to the characteristic parameter of the corresponding ground state circuit of the type selecting of object circuit, just using the characteristic parameter of ground state circuit as fiducial value, standardization can be carried out to the characteristic parameter of object circuit, obtain perunit value parameter.
Step S130, dissolves than constant volume formula according to described perunit value parameter and the line end photovoltaic power-carrying corresponding with the type of described object circuit, and the end photovoltaic power-carrying obtaining described object circuit is dissolved ratio;
Line end photovoltaic power-carrying is dissolved and is being ensured under the prerequisite that node voltage does not get over the upper limit than referring to, the ratio of the maximum distribution formula photovoltaic capacity that 10kV distribution line can be accessed by and 10kV distribution line distribution transformer total capacity.The type of object circuit is different, and the line end photovoltaic power-carrying selected is dissolved also more different than constant volume formula, and in the optional execution mode of one, if the type of object circuit is cable line, then line end photovoltaic power-carrying is dissolved than constant volume formula and is:
y＝C
1-ax
1+bx
2-cx
3+dx
4-ex
5-fx
6(1)
In formula (1), x
1for perunit value parameter, the x of circuit beam length
2for perunit value parameter, the x of backbone footpath area
3for perunit value parameter, the x of transformer station 10kV busbar voltage
4for perunit value parameter, the x of minimum load Rate of average load
5for perunit value parameter, the x of line power factor
6for the perunit value parameter of distribution transformer average size; A, b, c, d, e, f are respectively the sensitivity coefficient of each perunit value parameter; C
1for correction factor; Y is that line end photovoltaic power-carrying is dissolved ratio.
In the optional execution mode of another kind, if the type of object circuit is overhead transmission line, then line end photovoltaic power-carrying is dissolved than constant volume formula and is:
y＝C
1-ax
1+bx
2-cx
3+dx
4-ex
5+fx
6(2)
In formula (2), x
1for perunit value parameter, the x of circuit beam length
2for perunit value parameter, the x of backbone footpath area
3for perunit value parameter, the x of transformer station 10kV busbar voltage
4for perunit value parameter, the x of minimum load Rate of average load
5for perunit value parameter, the x of line power factor
6for the perunit value parameter of distribution transformer average size; A, b, c, d, e, f are respectively the sensitivity coefficient of each perunit value parameter; C
1for correction factor; Y is that line end photovoltaic power-carrying is dissolved ratio.
Dissolve than constant volume formula according to the type selecting of object circuit corresponding line end photovoltaic power-carrying, bring perunit value parameter into, the end photovoltaic power-carrying that just can obtain object circuit is dissolved ratio.
Step S140, according to the actual accessing position information of distributed photovoltaic in described object circuit and the type of described object circuit, dissolving than revising to described end photovoltaic power-carrying, obtaining the dissolved photovoltaic power-carrying ratio of described object circuit;
Dissolving than afterwards in the end photovoltaic power-carrying obtaining object circuit, according to the type of object circuit, then according to the actual accessing position information of distributed photovoltaic in object circuit, the end photovoltaic power-carrying of object circuit being dissolved than revising.In the optional execution mode of one, when revising, object circuit is divided into several segmentations by beam length, the actual accessing position information of distributed photovoltaic is the segment information that distributed photovoltaic accesses described object circuit.Preferably, object circuit can be divided into three sections by beam length, when the segment information of distributed photovoltaic access object circuit is different, the correction factor C of employing
2also different, namely adopt different correction factor C when distributed photovoltaic is in different segmentation position access
2the end photovoltaic power-carrying revising object circuit is dissolved ratio, C
2concrete value is as follows:
If the type of object circuit is cable line, then according to the form below value:
| Distributed photovoltaic present position | 0 ~ 1/2 section | 1/2 ~ 3/4 section | 3/4 ~ end |
| Correction factor C 2 | 1.65 | 1.27 | 0.95 |
If the type of object circuit is overhead transmission line, then according to the form below value:
| Distributed photovoltaic present position | 0 ~ 1/2 section | 1/2 ~ 3/4 section | 3/4 ~ end |
| Correction factor C 2 | 1.5 | 1.22 | 0.95 |
In the optional execution mode of one, by correction factor C
2be multiplied by and the end photovoltaic power-carrying of object circuit is dissolved ratio, the dissolved photovoltaic power-carrying ratio of object circuit can be obtained.
Step S150, according to distribution transformer total capacity and described the dissolved photovoltaic power-carrying of photovoltaic power-carrying than the described object circuit of acquisition of dissolving of described object circuit.
The dissolved photovoltaic power-carrying of object circuit, specifically refers to that object line road is just meeting maximum distribution formula photovoltaic capacity accessible under the constraints of the node voltage not more upper limit.The dissolved photovoltaic power-carrying of object circuit is multiplied than with the distribution transformer total capacity of object circuit, obtains the dissolved photovoltaic power-carrying of object circuit.
The idiographic flow schematic diagram of 10kV distribution line distributed photovoltaic constant volume method of the present invention when implementing during Fig. 3.For southern area 10kV cable line, implementation process of the present invention and beneficial effect thereof are described below.
The characteristic parameter of this 10kV cable line is specially: circuit beam length is 5.6km, and backbone footpath area is 300mm
2, transformer station 10kV busbar voltage is 10.5kV, and minimum load Rate of average load is 40%, and line power factor is 0.95, and distribution transformer average size is 486kVA.
Then select the characteristic parameter of the ground state circuit relative with this cable line, standardization carried out to the characteristic parameter of this cable line, obtain perunit value parameter as follows:
| x 1 | x 2 | x 3 | x 4 | x 5 | x 6 |
| 1.400 | 1.250 | 1.019 | 1.143 | 1.022 | 0.771 |
Then dissolve than constant volume formula according to the perunit value parameter of object circuit and the line end photovoltaic power-carrying corresponding with the type of object circuit, the end photovoltaic power-carrying of calculating object circuit is dissolved ratio.Because object circuit is cable line, therefore select formula (1), by perunit value parameter x
1, x
2, x
3, x
4, x
5, x
6substitute in formula (1) and calculate.In the present embodiment, the value of sensitivity coefficient a, b, c, d, e, f in formula (1) is respectively 0.141,0.337,7.161,0.323,1.822,0.238; Correction factor C
1value is 9.323.To be dissolved ratio by the end photovoltaic power-carrying calculating this cable line, specific as follows:
y＝C
1-ax
1+bx
2-cx
3+dx
4-ex
5-fx
6
＝9.323-0.141×1.400+0.337×1.250-7.161×1.019
+0.323×1.143-1.822×1.022-0.238×0.771
＝0.57
Then according to the actual on-position of distributed photovoltaic, end photovoltaic power-carrying is dissolved than revising.In this embodiment, the distributed photovoltaic on-position distance feeder line head end 4.1km of object circuit, namely distributed photovoltaic is in 1/2 ~ 3/4 section of circuit, therefore selects corresponding correction factor C
2be 1.27, by correction factor C
2dissolve than be multiplied with the end photovoltaic power-carrying calculated above, the dissolved photovoltaic power-carrying ratio can revising rear object circuit is 0.72.By the distribution transformer total capacity of object circuit, above result is reduced again, dissolved photovoltaic power-carrying by object circuit is multiplied with the distribution transformer total capacity 11175kVA of object circuit than 0.72, and the dissolved photovoltaic power-carrying obtaining object circuit is 8046kW.
Distribution power system load flow calculation software carries out modeling and simulating to this object circuit, by increasing the distributed photovoltaic capacity of access gradually and carrying out Load flow calculation, obtaining object circuit is ensureing under the prerequisite that node voltage does not get over the upper limit, accessible actual photovoltaic power-carrying dissolve than being 0.75, a little more than the dissolved photovoltaic power-carrying ratio being calculated gained by technical scheme of the present invention, also leave certain nargin under the premise that security is guaranteed, the needs of realistic project planning.
In addition, also choose southern area 10kV overhead transmission line as object circuit, the characteristic parameter collecting this object circuit is specially: circuit beam length is 18.74km, and backbone footpath area is 150mm
2, transformer station 10kV busbar voltage is 10.5kV, and minimum load Rate of average load is 50%, and line power factor is 0.90, and distribution transformer average size is 250kVA.
The characteristic parameter of this object circuit is carried out standardization with the characteristic parameter of ground state circuit for fiducial value, obtains the perunit value parameter of object circuit as following table:
| x 1 | x 2 | x 3 | x 4 | x 5 | x 6 |
| 1.874 | 0.811 | 1.019 | 1.429 | 1.023 | 1.250 |
Then dissolve than constant volume formula according to the perunit value parameter of object circuit and the line end photovoltaic power-carrying corresponding with the type of object circuit, the end photovoltaic power-carrying of calculating object circuit is dissolved ratio.Because object circuit is overhead transmission line, therefore formula (2) is selected to calculate.In the present embodiment, the value of sensitivity coefficient a, b, c, d, e, f in formula (1) is respectively 0.023,0.157,2.397,0.261,0.454,0.010; Correction factor C
1value is 2.825.Then, by perunit value parameter x
1, x
2, x
3, x
4, x
5, x
6substitute in formula (2), to be dissolved ratio by the end photovoltaic power-carrying calculating this overhead transmission line, specific as follows:
y＝C
1-ax
1+bx
2-cx
3+dx
4-ex
5+fx
6
＝2.825-0.023×1.874+0.157×0.811-2.397×1.019
+0.261×1.429-0.454×1.023-0.010×1.250
＝0.39
Then according to the actual accessing position information of distributed photovoltaic, end photovoltaic power-carrying is dissolved than revising.The distributed photovoltaic on-position distance feeder line head end 9.3km of object circuit, namely distributed photovoltaic is in 0 ~ 1/2 section of circuit, therefore selects corresponding correction factor C
2be 1.5, by correction factor C
2dissolve than be multiplied with the end photovoltaic power-carrying calculating gained above, the dissolved photovoltaic power-carrying ratio can revising rear object circuit is 0.59.By the distribution transformer total capacity of object circuit, above result is reduced again, dissolved photovoltaic power-carrying by object circuit is multiplied with the distribution transformer total capacity 9000kVA of object circuit than 0.59, and the dissolved photovoltaic power-carrying obtaining object circuit is 5310kW.
And on distribution power system load flow calculation software, modeling and simulating is carried out to this object circuit, by increasing the distributed photovoltaic capacity of access gradually and carrying out Load flow calculation, obtaining object circuit is ensureing under the prerequisite that node voltage does not get over the upper limit, accessible actual photovoltaic power-carrying dissolve than being 0.60, a little more than the dissolved photovoltaic power-carrying ratio being calculated gained by technical scheme provided by the invention, also leave certain nargin under the premise that security is guaranteed, can actual requirement of engineering be met equally.
Comprehensive above content is visible, adopts 10kV distribution line distributed photovoltaic constant volume method of the present invention, and the dissolved photovoltaic calculated power-carrying is very close and be slightly less than the actual photovoltaic power-carrying of circuit.Therefore, reference based on typical ground state circuit, adopt technical scheme of the present invention, the accessible maximum distribution formula capacity of 10kV distribution line can be obtained exactly under the condition ensureing voltage security of operation, thus provide qualitative reference for the distributed photovoltaic configuration of circuit.
According to the 10kV distribution line distributed photovoltaic constant volume method of the invention described above, the present invention also provides a kind of 10kV distribution line distributed photovoltaic constant volume system, is described in detail to 10kV distribution line distributed photovoltaic constant volume system of the present invention below in conjunction with accompanying drawing and preferred embodiment.
Fig. 4 is 10kV distribution line distributed photovoltaic constant volume system of the present invention structural representation in one embodiment.As shown in Figure 4, the 10kV distribution line distributed photovoltaic constant volume system in this embodiment comprises:
Characteristic parameter acquisition module 100, for obtaining the characteristic parameter of object circuit;
Standardization module 200, for the characteristic parameter according to ground state circuit corresponding to the type selecting of described object circuit, carries out standardization to the characteristic parameter of described object circuit, obtains perunit value parameter;
Dissolve than computing module 300, for dissolving than constant volume formula according to described perunit value parameter and the line end photovoltaic power-carrying corresponding with the type of described object circuit, the end photovoltaic power-carrying obtaining described object circuit is dissolved ratio;
Correcting module 400, for according to the actual accessing position information of distributed photovoltaic in described object circuit and the type of described object circuit, described end photovoltaic power-carrying being dissolved than revising, obtaining the dissolved photovoltaic power-carrying ratio of described object circuit;
Constant volume computing module 500, for according to the distribution transformer total capacity of described object circuit and described photovoltaic power-carrying of dissolving than the dissolved photovoltaic power-carrying obtaining described object circuit.
In the optional execution mode of one, described characteristic parameter comprises circuit beam length, backbone footpath area, transformer station 10kV busbar voltage, minimum load Rate of average load, line power factor and distribution transformer average size.
In the optional execution mode of one, the actual accessing position information of distributed photovoltaic is the segment information that distributed photovoltaic accesses described object circuit.
Above-mentioned 10kV distribution line distributed photovoltaic constant volume system can perform the 10kV distribution line distributed photovoltaic constant volume method that the embodiment of the present invention provides, and possesses the corresponding functional module of manner of execution and beneficial effect.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a 10kV distribution line distributed photovoltaic constant volume method, is characterized in that, comprise the steps:
Obtain the characteristic parameter of object circuit;
According to the characteristic parameter of ground state circuit corresponding to the type selecting of described object circuit, standardization is carried out to the characteristic parameter of described object circuit, obtain perunit value parameter;
Dissolve than constant volume formula according to described perunit value parameter and the line end photovoltaic power-carrying corresponding with the type of described object circuit, the end photovoltaic power-carrying obtaining described object circuit is dissolved ratio;
According to the actual accessing position information of distributed photovoltaic in described object circuit and the type of described object circuit, described end photovoltaic power-carrying being dissolved than revising, obtaining the dissolved photovoltaic power-carrying ratio of described object circuit;
According to distribution transformer total capacity and described the dissolved photovoltaic power-carrying of photovoltaic power-carrying than the described object circuit of acquisition of dissolving of described object circuit.
2. 10kV distribution line distributed photovoltaic constant volume method according to claim 1, it is characterized in that, described characteristic parameter comprises circuit beam length, backbone footpath area, transformer station 10kV busbar voltage, minimum load Rate of average load, line power factor and distribution transformer average size.
3. 10kV distribution line distributed photovoltaic constant volume method according to claim 2, it is characterized in that, if the type of described object circuit is cable line, then the characteristic parameter of described ground state circuit comprises:
Described circuit beam length is 4.0 kms, described backbone footpath area is 240 square millimeters, and described transformer station 10kV busbar voltage is 10.3 kilovolts, and described minimum load Rate of average load is 35%, described line power factor is 0.93, and described distribution transformer average size is 630 kilovolt-amperes.
4. 10kV distribution line distributed photovoltaic constant volume method according to claim 2, it is characterized in that, if the type of described object circuit is overhead transmission line, then the characteristic parameter of described ground state circuit comprises:
Described circuit beam length is 10.0 kms, described backbone footpath area is 185 square millimeters, and described transformer station 10kV busbar voltage is 10.3 kilovolts, and described minimum load Rate of average load is 35%, described line power factor is 0.88, and described distribution transformer average size is 200 kilovolt-amperes.
5. 10kV distribution line distributed photovoltaic constant volume method according to claim 2, is characterized in that, if the type of described object circuit is cable line, then described line end photovoltaic power-carrying is dissolved than constant volume formula and is:
y＝C
1-ax
1+bx
2-cx
3+dx
4-ex
5-fx
6
In formula, x
1for perunit value parameter, the x of described circuit beam length
2for perunit value parameter, the x of described backbone footpath area
3for perunit value parameter, the x of described transformer station 10kV busbar voltage
4for perunit value parameter, the x of described minimum load Rate of average load
5for perunit value parameter, the x of described line power factor
6for the perunit value parameter of described distribution transformer average size; A, b, c, d, e, f are respectively the sensitivity coefficient of each perunit value parameter; C
1for correction factor; Y is that line end photovoltaic power-carrying is dissolved ratio.
6. 10kV distribution line distributed photovoltaic constant volume method according to claim 2, is characterized in that, if the type of described object circuit is overhead transmission line, then described line end photovoltaic power-carrying is dissolved than constant volume formula and is:
y＝C
1-ax
1+bx
2-cx
3+dx
4-ex
5+fx
6
In formula, x
1for perunit value parameter, the x of described circuit beam length
2for perunit value parameter, the x of described backbone footpath area
3for perunit value parameter, the x of described transformer station 10kV busbar voltage
4for perunit value parameter, the x of described minimum load Rate of average load
5for perunit value parameter, the x of described line power factor
6for the perunit value parameter of described distribution transformer average size; A, b, c, d, e, f are respectively the sensitivity coefficient of each perunit value parameter; C
1for correction factor; Y is that line end photovoltaic power-carrying is dissolved ratio.
7. 10kV distribution line distributed photovoltaic constant volume method according to claim 1, it is characterized in that, the actual accessing position information of described distributed photovoltaic is the segment information that described distributed photovoltaic accesses described object circuit.
8. a 10kV distribution line distributed photovoltaic constant volume system, is characterized in that, comprising:
Characteristic parameter acquisition module, for obtaining the characteristic parameter of object circuit;
Standardization module, for the characteristic parameter according to ground state circuit corresponding to the type selecting of described object circuit, carries out standardization to the characteristic parameter of described object circuit, obtains perunit value parameter;
Dissolve than computing module, for dissolving than constant volume formula according to described perunit value parameter and the line end photovoltaic power-carrying corresponding with the type of described object circuit, the end photovoltaic power-carrying obtaining described object circuit is dissolved ratio;
Correcting module, for according to the actual accessing position information of distributed photovoltaic in described object circuit and the type of described object circuit, dissolving than revising to described end photovoltaic power-carrying, obtaining the dissolved photovoltaic power-carrying ratio of described object circuit;
Constant volume computing module, for according to the distribution transformer total capacity of described object circuit and described photovoltaic power-carrying of dissolving than the dissolved photovoltaic power-carrying obtaining described object circuit.
9. 10kV distribution line distributed photovoltaic constant volume system according to claim 8, it is characterized in that, described characteristic parameter comprises circuit beam length, backbone footpath area, transformer station 10kV busbar voltage, minimum load Rate of average load, line power factor and distribution transformer average size.
10. 10kV distribution line distributed photovoltaic constant volume system according to claim 8, is characterized in that, the actual accessing position information of described distributed photovoltaic is the segment information that described distributed photovoltaic accesses described object circuit.
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