CN105048483B - The energy accumulation capacity configuration and system of the power distribution network containing photovoltaic - Google Patents
The energy accumulation capacity configuration and system of the power distribution network containing photovoltaic Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention provides a kind of energy accumulation capacity configuration and system of the power distribution network containing photovoltaic, gathered parameter of double--layer grids, maximum operational mode daily load and photovoltaic plant day active power output in a upper period, Load flow calculation obtains each grid-connected day operation voltage data of sampling instant, set the bound of grid-connected voltage constraint, according to the working voltage of grid-connected point, the energy storage power output array of each sampled point is obtained using grid entry point unique step Power-injected method, and temporally step-length integrates to obtain energy storage configuration capacity.Whole process simple, intuitive, consider the stored energy capacitance configuration of voltage constraint, from avoiding the angle of grid-connected voltage out-of-limit from carrying out energy storage configuration, distribu-tion index is intuitively easily surveyed effectively, and the definite and optimization available for stored energy capacitance considers that the stored energy capacitance of voltage constraint configures.
Description
Technical field
The present invention relates to electric power network technical field, more particularly to the power distribution network containing photovoltaic energy accumulation capacity configuration with
System.
Background technology
With the rapid development of economy, electricity needs continues to increase, the increasingly deficient and environment of traditional energy is increasingly
Deteriorate, photovoltaic generation large-scale grid connection is into development trend.
But photovoltaic is obvious by Natural resources condition and weather influence, there is fluctuation and intermittent, one
Determine the power distribution network of access is caused to disturb and impacted in degree, even result in voltage out-of-limit, influence the safe and reliable of power grid and stablize
Operation.In order to utilize illumination resource to greatest extent, photovoltaic generation is usually run with unity power factor, and energy storage is active in balance
Output has its unique advantage, therefore, grid entry point voltage can be effectively adjusted in grid-connected point configuration energy storage, therefore how
The stored energy capacitance configuration of photovoltaic power distribution network is carried out also known as a problem in the urgent need to address.
In recent years, there are much collocation methods on stored energy capacitance both at home and abroad, but there are energy storage distribu-tion index for conventional method
The problem of not directly perceived enough and it is complicated the shortcomings that.
The content of the invention
Based on this, it is necessary to which for the collocation method of stored energy capacitance of the generally power distribution network containing photovoltaic, there are energy storage distribu-tion index
The problem of not directly perceived enough and complicated, there is provided a kind of energy storage distribu-tion index is directly perceived and the stored energy capacitance of the simply power distribution network containing photovoltaic is matched somebody with somebody
Put method and system.
A kind of energy accumulation capacity configuration of power distribution network containing photovoltaic, including step：
Gather Net Frame of Electric Network parameter, in a upper period maximum operational mode daily load and photovoltaic plant day it is active go out
Power；
According to Net Frame of Electric Network parameter, in a upper period maximum operational mode daily load and photovoltaic plant day it is active go out
Power, using distribution power system load flow calculation, obtains grid-connected day operation voltage data；
Required according to electric power netting safe running, set the upper limit value and lower limit of grid-connected voltage constraint；
The upper limit value and lower limit ratio that grid-connected day operation voltage data is constrained with grid-connected voltage respectively
Compared with, and energy storage output power is obtained using grid entry point unique step Power-injected method；
By energy storage output power, temporally step-length integrates to obtain the energy storage configuration capacity of the power distribution network containing photovoltaic.
A kind of stored energy capacitance configuration system of the power distribution network containing photovoltaic, including：
Acquisition module, for gathering Net Frame of Electric Network parameter, maximum operational mode daily load and photovoltaic in a upper period
Power station day active power output；
Voltage data acquisition module, for according to Net Frame of Electric Network parameter, maximum operational mode daily load in a upper period
And photovoltaic plant day active power output, using distribution power system load flow calculation, obtain grid-connected day operation voltage data；
Upper lower limit value setting module, for being required according to electric power netting safe running, grid-connected voltage of setting constrains upper
Limit value and lower limit；
Energy storage output power calculates module, for grid-connected day operation voltage data is electric with grid-connected point respectively
The upper limit value and lower limit for pressing constraint compare, and obtain energy storage output power using grid entry point unique step Power-injected method；
Energy storage configuration capacity acquisition module, for temporally step-length to integrate to obtain power distribution network containing photovoltaic by energy storage output power
Energy storage configuration capacity.
The energy accumulation capacity configuration and system of the power distribution network of the invention containing photovoltaic, gathered parameter of double--layer grids, in a upper period
Maximum operational mode daily load and photovoltaic plant day active power output, Load flow calculation obtain each sampling instant grid-connected point day
Working voltage data, set the bound of grid-connected voltage constraint, grid-connected according to the working voltage of grid-connected point, use
Point unique step Power-injected method obtains the energy storage power output array of each sampled point, and temporally step-length is integrated to obtain energy storage and matched somebody with somebody
Put capacity.Whole process is simple, the stored energy capacitance configuration of voltage constraint is considered, from the angle for avoiding grid-connected voltage out-of-limit
Energy storage configuration is carried out, distribu-tion index is intuitively easily surveyed effectively, and the definite and optimization available for stored energy capacitance considers the storage of voltage constraint
Can capacity configuration.
Brief description of the drawings
Fig. 1 is the flow diagram of energy accumulation capacity configuration one embodiment of the power distribution network of the invention containing photovoltaic；
Fig. 2 is the flow diagram of energy accumulation capacity configuration the second embodiment of the power distribution network of the invention containing photovoltaic.
Fig. 3 connects for photovoltaic plant in the one of application example of energy accumulation capacity configuration of the power distribution network of the invention containing photovoltaic
Enter the simplified model schematic diagram of 10kV power distribution networks；
Fig. 4 is photovoltaic plant in the one of application example of energy accumulation capacity configuration of the power distribution network of the invention containing photovoltaic
Output power and load power curve map；
Fig. 5 is not configure energy storage in the one of application example of energy accumulation capacity configuration of the power distribution network of the invention containing photovoltaic
The day operation voltage curve of each node；
Fig. 6 each moment storages in the one of application example of energy accumulation capacity configuration for the power distribution network of the invention containing photovoltaic
The output curve diagram of energy power；
Fig. 7 is the voltage curve that each node after energy storage is configured by the energy accumulation capacity configuration of present invention power distribution network containing photovoltaic
Figure；
Fig. 8 is that the stored energy capacitance of the power distribution network of the invention containing photovoltaic configures the structure diagram of system one embodiment；
Fig. 9 is that the stored energy capacitance of the power distribution network of the invention containing photovoltaic configures the structure diagram of second embodiment of system.
Embodiment
As shown in Figure 1, a kind of energy accumulation capacity configuration of power distribution network containing photovoltaic, including step：
S100：Gathered Net Frame of Electric Network parameter, maximum operational mode daily load and photovoltaic plant day have in a upper period
Work(is contributed.
Net Frame of Electric Network parameter, in a upper period maximum operational mode daily load and photovoltaic plant day active power output these
Data can be based on power grid historical data and obtain.A upper period be specifically as follows one month, a season or 1 year etc. when
Between section.
As shown in Fig. 2, in one of the embodiments, step 100 includes step：
S120：Determine the sampling time interval △ t of Dan Tian.
Determine the sampling time interval △ t of one day, then one day common n sampled point.
S140：Gathered Net Frame of Electric Network parameter, maximum operational mode day each each load points of sampling instant i in a upper period
Load data and same day photovoltaic plant each sampling instant i in one day active power output.
Gathered Net Frame of Electric Network line impedance, maximum operational mode day each each load points of sampling instant i in a upper period
Load data and same day photovoltaic plant each sampling instant i in one day active power output PVi。
S200：According to Net Frame of Electric Network parameter, maximum operational mode daily load and photovoltaic plant day have in a upper period
Work(is contributed, and using distribution power system load flow calculation, obtains grid-connected day operation voltage data.
Net Frame of Electric Network parameter mainly includes Net Frame of Electric Network line impedance, calls distribution power system load flow calculation program solution each moment
Grid-connected voltage Ui, (i=1,2 ... ... n), obtains one group of day operation voltage array U=(U1, U2... ..., Un).According to
Photovoltaic plant output PVAnd load data PL、QL, parameter of double--layer grids situation, calls distribution power system load flow calculation program solution to go out each moment
Grid-connected voltage Ui。
S300：Required according to electric power netting safe running, set the upper limit value and lower limit of grid-connected voltage constraint.
Electric power netting safe running requirement can be known based on the relevant industries criterion of power industry, the safety in different power distribution networks
Service requirement differs, for example, in 10kV power distribution networks, it is allowed to the voltage range deviation of operation is ± 7%, in terms of perunit value, operation
Voltage range is 0.93kV~1.07kV.
S400：The upper limit value and lower limit that grid-connected day operation voltage data is constrained with grid-connected voltage respectively
Value compares, and obtains energy storage output power using grid entry point unique step Power-injected method.
By each element U in grid-connected day operation voltage data Ui(i=1,2 ..., n) respectively with voltage about
The upper limit of beamAnd lower limitUCompare, and energy storage output power, ith sample are obtained using grid entry point unique step Power-injected method
The energy storage output power of point is psi；The energy storage output power of each sampled point is stored in an array, this array is referred to as pS。
Grid entry point unique step Power-injected method refer to photovoltaic grid entry point unique step inject energy storage power, until the electricity of grid-connected point
The method being pressed in restriction range.
Specifically, in one of the embodiments, the energy storage output power p of ith sample pointsiObtain by the following method
：
Initialize energy storage output power psi=0, setting energy storage injecting power step-length △ Ps；If Ui<U, in grid-connected point
Using step-length as △ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, solve photovoltaic simultaneously
Site voltage Ui, until grid-connected voltage is more than U, setting psiFor the injecting power of energy storage at this time；IfIn light
Grid entry point is lied prostrate using step-length as-△ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, ask
Grid-connected voltage is solved, until grid-connected voltage is less thanP is setsiFor the injecting power of energy storage at this time；IfP is setsiFor 0.
S500：By energy storage output power, temporally step-length integrates to obtain the energy storage configuration capacity of the power distribution network containing photovoltaic.
In one of the embodiments, step S500 specifically includes step：
Judge the positive and negative of energy storage output power value；
Energy storage output power value is added up summation for positive numerical value, record summed result is sumpos, by energy storage output power
It is worth to add up for negative numerical value and sums and negate, it is sum that record summation, which negates result,neg；
Compare summed result sumposResult sum is negated with summationnegSize, work as sumpos>sumnegWhen, set energy storage to match somebody with somebody
It is sum to put capacitypos* △ t, work as sumpos≤sumnegWhen, it is sum to set energy storage configuration capacityneg*△t。
The energy accumulation capacity configuration of the power distribution network of the invention containing photovoltaic, collection parameter of double--layer grids, maximum fortune in a upper period
Line mode daily load and photovoltaic plant day active power output, Load flow calculation obtain each grid-connected day operation electricity of sampling instant
Data are pressed, the bound of grid-connected voltage constraint is set, according to the working voltage of grid-connected point, is walked using grid entry point etc.
Long Power-injected method obtains the energy storage power output array of each sampled point, and temporally step-length integrates to obtain energy storage configuration appearance
Amount.Whole process simple, intuitive, considers the stored energy capacitance configuration of voltage constraint, from the angle for avoiding grid-connected voltage out-of-limit
Energy storage configuration is carried out, distribu-tion index is intuitively easily surveyed effectively, and the definite and optimization available for stored energy capacitance considers the storage of voltage constraint
Can capacity configuration.
In one of the embodiments, it is described by grid-connected day operation voltage data respectively with grid-connected voltage
The upper limit value and lower limit of constraint compare, and obtain energy storage output power using grid entry point unique step Power-injected method and specifically include
Step：
Initialize energy storage output power ps0=0, setting energy storage injecting power step-length △ Ps；
By grid-connected day operation voltage UiThe upper limit value constrained respectively with grid-connected voltageAnd lower limitUThan
Compared with；
As grid-connected day operation voltage UiThe lower limit of less than grid-connected voltage constraintUWhen, grid-connected
Point is using step-length as △ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, solve photovoltaic
Grid entry point voltage, until grid-connected voltage is more than the lower limit of grid-connected voltage constraintU, energy storage output power is set
psiFor the injecting power of energy storage at this time；
As grid-connected day operation voltage UiThe upper limit value of more than grid-connected voltage constraintWhen, grid-connected
Point is using step-length as-△ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, solve photovoltaic
Grid entry point voltage, until grid-connected voltage is less than the upper limit value of grid-connected voltage constraintEnergy storage output work is set
Rate psiFor the injecting power of energy storage at this time；
As grid-connected day operation voltage UiThe upper limit value of less than or equal to grid-connected voltage constraintAnd it is more than
The lower limit of equal to grid-connected voltage constraintUWhen, energy storage output power p is setsiIt is zero.
An instantiation will be used below, and be combined the energy storage of Fig. 3, Fig. 4, Fig. 5 to present invention power distribution network containing photovoltaic and held
Amount collocation method is further illustrated.
Fig. 3 accesses the simplified model of 10kV power distribution networks for middle photovoltaic plant in this specific embodiment, and 1,2,3,4 distinguish in figure
Represent node serial number.
Step 1：Determine the sampling time interval △ t=15min of one day, then one day common n=96 sampled point；
Step 2：Gathered Net Frame of Electric Network line impedance, maximum operational mode day, each sampling instant i was each in a upper period
The active power output P of load data and same day photovoltaic plant each sampling instant i in one day of load pointVi；
Node 1 arrives the line impedance Z between node 212, node 2 arrive node 3 between line impedance Z23, system equivalent electricity
Anti- X0, since susceptance is very small over the ground in 10kV power distribution networks, ignore line-to-ground susceptance.Above parameter is respectively：
Z12=(0.63+j1.2) Ω, Z23=(1.26+j2.4) Ω, X0=j0.6 Ω
Infinite bus system node voltage perunit value is：V4=1.05
In a upper period maximum operational mode day each each load points of sampling instant i load data and same day photovoltaic
The active power output P of power station each sampling instant i in one dayViAs shown in figure 4, photovoltaic plant is run with unit power, i.e. QV=0,
Fig. 4 shows the output P for the photovoltaic plant that each sampling instant is formedVAnd the active P of loadLIdle QLCurve.
Step 3：Call grid-connected voltage U of distribution power system load flow calculation program solution each momenti(i=1,2 ... ...
N), one group of day operation voltage array U=(U is obtained1, U2... ..., Un)；According to photovoltaic plant output PVAnd load data PL、QL,
Parameter of double--layer grids situation, calls distribution power system load flow calculation program solution to go out grid-connected voltage U of each momenti, for more intuitively
Understand the voltage condition of different nodes in example, Fig. 5 gives the day operation voltage number that each node each moment is formed in example
The voltage curve that group is linked to be.
Step 4：Required to set the bound of grid-connected voltage constraint according to safe operation： U；
In 10kV power distribution networks, it is allowed to which the voltage range deviation of operation is ± 7%, and in terms of perunit value, working voltage scope is
0.93kV~1.07kV.Consider certain nargin, set U=0.95, i.e., grid-connected voltage is constrained in
Between 0.95kV~1.06kV.
Step 5：By each element U in grid entry point day operation voltage array Ui(i=1,2 ... ... n) respectively with electricity
Press the upper limit of constraintAnd lower limitUCompare, and energy storage output power is obtained using grid entry point unique step Power-injected method, i-th
The energy storage output power of sampled point is psi；The energy storage output power of each sampled point is stored in an array, claims this array
For ps。
The energy storage output power p of ith sample pointsiObtain by the following method：
Initialize energy storage output power ps0=0, setting energy storage injecting power step-length △ Ps；If Ui<U, in grid-connected point
Using step-length as △ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, solve photovoltaic simultaneously
Site voltage Ui, until grid-connected voltage is more than U, setting psiFor the injecting power of energy storage at this time；IfIn light
Grid entry point is lied prostrate using step-length as-△ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, ask
Grid-connected voltage is solved, until grid-connected voltage is less thanP is setsiFor the injecting power of energy storage at this time；IfP is setsiFor 0.In this embodiment, there is the more upper limit and more lower limit feelings in grid-connected voltage
Condition, finds at the time of grid-connected point U gets over the upper limit and is：11:00~14:It is at the time of 45 this period, more lower limit：18:
00~23:00 this period.From day operation voltage array U, be the 44th~59 element occur more the upper limit, the 72nd~
There is more lower limit in 92 elements, and the upper limit is got in totally 16 sampling instants, and lower limit, setting △ P are got in 21 sampling instantsS=
0.05MW；If Ui<U, in grid-connected point using step-length as △ PsEnergy storage power is progressively injected, a power is often injected and carries out once
Distribution power system load flow calculation, solves grid-connected voltage Ui, until grid-connected voltage is more than U, setting Psi is energy storage at this time
Injecting power；IfEnergy storage power is progressively injected using step-length as-Δ Ps in grid-connected point, often injects a power
Primary distribution Load flow calculation is carried out, grid-connected voltage is solved, until grid-connected voltage is less thanP is setsiFor
The injecting power of energy storage at this time；IfP is setsiFor 0；Fig. 6 shows that the output of each moment energy storage power is bent
Line, psi>0 expression energy storage is in discharge condition, psi<0 expression energy storage is in charged state.
Step 6：To psiElement summed, integrate to obtain energy storage configuration capacity.
To psElement summed, integrate to obtain energy storage configuration capacity, energy storage configuration capacity determines by the following method：Sentence
Disconnected energy storage output power value it is positive and negative, energy storage output power value is added up summation for positive numerical value, recording summed result is
sumpos, energy storage output power value is added up for negative numerical value and sums and negates, it is sum that record summation, which negates result,neg, compare and ask
With result sumposResult sum is negated with summationnegSize, work as sumpos>sumnegWhen, it is sum to set energy storage configuration capacitypos*
△ t, work as sumpos≤sumnegWhen, it is sum to set energy storage configuration capacityneg*△t。
In this embodiment, psIn it is all be more than 0 element totally 21, psIn it is all be less than 0 element totally 16；
To psIn it is all be more than 0 element summation, summed result sumposRepresent；Then：sumpos=33；To psIn it is all be less than 0 member
Element is summed and is negated, and sums, negates result sumnegRepresent；Then：sumneg=41.05；
Because sumneg<sumneg, △ t=15min=0.25h, then the stored energy capacitance configured is：
C=sumneg* △ t=41.05MW*0.25h=10.2625MWgh
Therefore, in this embodiment, the configuration capacity C=10.2625MWgh of energy storage.
Given for visual test using the effect after the energy accumulation capacity configuration of the power distribution network of the invention containing photovoltaic, Fig. 7
After the energy accumulation capacity configuration configuration energy storage of present invention power distribution network containing photovoltaic, the day operation voltage curve of each node.
As shown in fig. 7, the voltage of node 1, i.e., the voltage of grid-connected point is accurately constrained in 0.96kV~1.06kV
Between, this proves the accuracy and validity for the energy storage output power that this method is calculated.In Figure 5, grid-connected institute
Node 1,2 voltage of node where load there is occurring more bound, and use power distribution network containing photovoltaic of the invention
Energy accumulation capacity configuration configuration energy storage after, node 1,
Node 2 is not in out-of-limit.As it can be seen that the energy accumulation capacity configuration configuration using the power distribution network of the invention containing photovoltaic
Energy storage can effectively solve the problems, such as caused local nodes voltage out-of-limit after photovoltaic access.
It is in one of the embodiments, described that by energy storage output power, temporally step-length integrates to obtain the power distribution network containing photovoltaic
There is step after energy storage configuration capacity：
The energy storage configuration capacity data of the power distribution network containing photovoltaic are stored.
The energy storage configuration capacity data for calculating the power distribution network containing photovoltaic obtained are stored, on the one hand avoid fortuitous event from causing
Loss of data, on the other hand also personnel easy to operation are subsequently checked again.
As shown in figure 8, a kind of stored energy capacitance configuration system of power distribution network containing photovoltaic, including：
Acquisition module 100, for gathering Net Frame of Electric Network parameter, maximum operational mode daily load and light in a upper period
Overhead utility day active power output；
Voltage data acquisition module 200, for being born maximum operational mode day according to Net Frame of Electric Network parameter, in a upper period
Lotus and photovoltaic plant day active power output, using distribution power system load flow calculation, obtain grid-connected day operation voltage data；
Upper lower limit value setting module 300, for being required according to electric power netting safe running, sets what grid-connected voltage constrained
Upper limit value and lower limit；
Energy storage output power calculate module 400, for by grid-connected day operation voltage data respectively with it is grid-connected
The upper limit value and lower limit of point voltage constraint compare, and obtain energy storage output power using grid entry point unique step Power-injected method；
Energy storage configuration capacity acquisition module 500, for temporally step-length to be integrated to obtain and matched somebody with somebody containing photovoltaic by energy storage output power
The energy storage configuration capacity of power grid.
The stored energy capacitance configuration system of the power distribution network of the invention containing photovoltaic, acquisition module 100 gathered parameter of double--layer grids, a upper time
Maximum operational mode daily load and photovoltaic plant day active power output in section, 200 Load flow calculation of voltage data acquisition module obtain
Each grid-connected day operation voltage data of sampling instant, upper lower limit value setting module 300 set grid-connected voltage about
The bound of beam, energy storage output power calculates working voltage of the module 400 according to grid-connected point, using grid entry point unique step work(
Rate injection method obtains the energy storage power output array of each sampled point, and energy storage configuration capacity acquisition module 500 temporally accumulate by step-length
Get energy storage configuration capacity.Whole process simple, intuitive, considers the stored energy capacitance configuration of voltage constraint, grid-connected from avoiding
The angle of point voltage out-of-limit carries out energy storage configuration, and distribu-tion index intuitively easily surveys effective, the definite and optimization available for stored energy capacitance
Consider the stored energy capacitance configuration of voltage constraint.
As shown in figure 9, in one of the embodiments, the acquisition module 100 specifically includes：
Sampling interval determination unit 120, for determining the sampling time interval △ t of Dan Tian；
Collecting unit 140, for gathering Net Frame of Electric Network parameter, in a upper period during each sampling of maximum operational mode day
Carve the active power output of load data and same day photovoltaic plant each sampling instant i in one day of each load points of i.
In one of the embodiments, the energy storage output power calculates module 400 and specifically includes：
Initial cell, for initializing energy storage output power ps0=0, setting energy storage injecting power step-length △ Ps；
Comparing unit, for by grid-connected day operation voltage UiThe upper limit value constrained respectively with grid-connected voltageAnd lower limitUCompare；
First processing units, for as grid-connected day operation voltage UiThe lower limit of less than grid-connected voltage constraint
ValueUWhen, in grid-connected point using step-length as △ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution tide
Stream calculation, solves grid-connected voltage, until grid-connected voltage is more than the lower limit of grid-connected voltage constraintU,
Energy storage output power p is setsiFor the injecting power of energy storage at this time；
Second processing unit, for as grid-connected day operation voltage UiThe upper limit of more than grid-connected voltage constraint
ValueWhen, in grid-connected point using step-length as-△ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution
Load flow calculation, solves grid-connected voltage, until grid-connected voltage is less than the upper limit value of grid-connected voltage constraintEnergy storage output power p is setsiFor the injecting power of energy storage at this time；
3rd processing unit, for as grid-connected day operation voltage UiWhat less than or equal to grid-connected voltage constrained
Upper limit valueAnd the lower limit of more than or equal to grid-connected voltage constraintUWhen, energy storage output power p is setsiIt is zero.
In one of the embodiments, the energy storage configuration capacity acquisition module 500 specifically includes：
Judging unit, for judging the positive and negative of energy storage output power value；
Energy storage configuration capacity computing unit, for energy storage output power value to be added up summation for positive numerical value, record is summed
As a result it is sumpos, energy storage output power value is added up for negative numerical value and sums and negates, it is sum that record summation, which negates result,neg；
Energy storage configuration capacity acquiring unit, for comparing summed result sumposResult sum is negated with summationnegSize,
Work as sumpos>sumnegWhen, it is sum to set energy storage configuration capacitypos* △ t, work as sumpos≤sumnegWhen, energy storage configuration capacity is set
For sumneg*△t。
In one of the embodiments, the stored energy capacitance configuration system of the power distribution network containing photovoltaic further includes：
Memory module, for the energy storage configuration capacity data of the power distribution network containing photovoltaic to be stored.
Embodiment described above only expresses the several embodiments of the present invention, its description is more specific and detailed, but simultaneously
Cannot therefore it be construed as limiting the scope of the patent.It should be pointed out that come for those of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. the energy accumulation capacity configuration of a kind of power distribution network containing photovoltaic, it is characterised in that including step：
Gathered Net Frame of Electric Network parameter, maximum operational mode daily load and photovoltaic plant day active power output in a upper period, institute
It is one month, a season or 1 year to state a period；
According to Net Frame of Electric Network parameter, maximum operational mode daily load and photovoltaic plant day active power output in a upper period, adopted
With distribution power system load flow calculation, grid-connected day operation voltage data is obtained；
Required according to electric power netting safe running, set the upper limit value and lower limit of grid-connected voltage constraint；
By grid-connected day operation voltage data respectively compared with the upper limit value and lower limit of grid-connected voltage constraint, and
Energy storage output power is obtained using grid entry point unique step Power-injected method；
By energy storage output power, temporally step-length integrates to obtain the energy storage configuration capacity of the power distribution network containing photovoltaic.
2. the energy accumulation capacity configuration of the power distribution network according to claim 1 containing photovoltaic, it is characterised in that the collection electricity
Net parameter of double--layer grids, maximum operational mode daily load and photovoltaic plant day active power output specifically include step in a upper period：
Determine the sampling time interval △ t of Dan Tian；
Gather Net Frame of Electric Network parameter, in a upper period maximum operational mode day each each load points of sampling instant i load number
According to this and same day photovoltaic plant each sampling instant i in one day active power output.
3. the energy accumulation capacity configuration of the power distribution network according to claim 1 or 2 containing photovoltaic, it is characterised in that described to incite somebody to action
Grid-connected day operation voltage data is respectively compared with the upper limit value and lower limit of grid-connected voltage constraint, and using simultaneously
Site unique step Power-injected method obtains energy storage output power and specifically includes step：
Initialize energy storage output power ps0=0, setting energy storage injecting power step-length △ Ps；
By grid-connected day operation voltage UiThe upper limit value constrained respectively with grid-connected voltageAnd lower limitUCompare；
As grid-connected day operation voltage UiThe lower limit of less than grid-connected voltage constraintUWhen, in grid-connected point with step
A length of △ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, solve grid-connected point
Voltage, until grid-connected voltage is more than the lower limit of grid-connected voltage constraintU, energy storage output power p is setsiFor this
When energy storage injecting power；
As grid-connected day operation voltage UiThe upper limit value of more than grid-connected voltage constraintWhen, grid-connected point with
Step-length is-△ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution Load flow calculation, solve grid-connected
Point voltage, until grid-connected voltage is less than the upper limit value of grid-connected voltage constraintEnergy storage output power p is setsi
For the injecting power of energy storage at this time；
As grid-connected day operation voltage UiThe upper limit value of less than or equal to grid-connected voltage constraintAnd it is more than or equal to light
Lie prostrate the lower limit of grid entry point voltage constraintUWhen, energy storage output power p is setsiIt is zero.
4. the energy accumulation capacity configuration of the power distribution network according to claim 2 containing photovoltaic, it is characterised in that described by energy storage
Temporally step-length integrates to obtain the energy storage configuration capacity of the power distribution network containing photovoltaic and specifically includes step output power：
Judge the positive and negative of energy storage output power value；
Energy storage output power value is added up summation for positive numerical value, record summed result is sumpos, it is by energy storage output power value
Negative numerical value, which adds up, to be summed and negates, and it is sum that record summation, which negates result,neg；
Compare summed result sumposResult sum is negated with summationnegSize, work as sumpos>sumnegWhen, set energy storage to configure and hold
Measure as sumpos* △ t, work as sumpos≤sumnegWhen, it is sum to set energy storage configuration capacityneg*△t。
5. the energy accumulation capacity configuration of the power distribution network according to claim 1 or 2 containing photovoltaic, it is characterised in that described to incite somebody to action
The energy storage output power energy storage configuration capacity that temporally step-length integrates to obtain the power distribution network containing photovoltaic also has step afterwards：
The energy storage configuration capacity data of the power distribution network containing photovoltaic are stored.
A kind of 6. stored energy capacitance configuration system of power distribution network containing photovoltaic, it is characterised in that including：
Acquisition module, for gathering Net Frame of Electric Network parameter, maximum operational mode daily load and photovoltaic plant in a upper period
Day active power output, the upper period is one month, a season or 1 year；
Voltage data acquisition module, for according to Net Frame of Electric Network parameter, in a upper period maximum operational mode daily load and
Photovoltaic plant day active power output, using distribution power system load flow calculation, obtain grid-connected day operation voltage data；
Upper lower limit value setting module, for being required according to electric power netting safe running, sets the upper limit value of grid-connected voltage constraint
And lower limit；
Energy storage output power calculate module, for by grid-connected day operation voltage data respectively with grid-connected voltage about
The upper limit value and lower limit of beam compare, and obtain energy storage output power using grid entry point unique step Power-injected method；
Energy storage configuration capacity acquisition module, for temporally step-length to integrate to obtain the storage of the power distribution network containing photovoltaic by energy storage output power
Can configuration capacity.
7. the stored energy capacitance configuration system of the power distribution network according to claim 6 containing photovoltaic, it is characterised in that the collection mould
Block specifically includes：
Sampling interval determination unit, for determining the sampling time interval △ t of Dan Tian；
Collecting unit, for gathering Net Frame of Electric Network parameter, maximum operational mode day each sampling instant i is each negative in a upper period
The active power output of load data and same day photovoltaic plant each sampling instant i in one day of lotus point.
8. the stored energy capacitance configuration system of the power distribution network containing photovoltaic according to claim 6 or 7, it is characterised in that the storage
Energy output power calculates module and specifically includes：
Initial cell, for initializing energy storage output power ps0=0, setting energy storage injecting power step-length △ Ps；
Comparing unit, for by grid-connected day operation voltage UiThe upper limit value constrained respectively with grid-connected voltageWith
Lower limitUCompare；
First processing units, for as grid-connected day operation voltage UiThe lower limit of less than grid-connected voltage constraintU
When, in grid-connected point using step-length as △ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution trend
Calculate, solve grid-connected voltage, until grid-connected voltage is more than the lower limit of grid-connected voltage constraintUIf
Put energy storage output power psiFor the injecting power of energy storage at this time；
Second processing unit, for as grid-connected day operation voltage UiThe upper limit value of more than grid-connected voltage constraint
When, in grid-connected point using step-length as-△ PsEnergy storage power is progressively injected, a power is often injected and carries out primary distribution trend
Calculate, solve grid-connected voltage, until grid-connected voltage is less than the upper limit value of grid-connected voltage constraintIf
Put energy storage output power psiFor the injecting power of energy storage at this time；
3rd processing unit, for as grid-connected day operation voltage UiThe upper limit of less than or equal to grid-connected voltage constraint
ValueAnd the lower limit of more than or equal to grid-connected voltage constraintUWhen, energy storage output power p is setsiIt is zero.
9. the stored energy capacitance configuration system of the power distribution network according to claim 7 containing photovoltaic, it is characterised in that the energy storage is matched somebody with somebody
Procurement of reserve capacity module is put to specifically include：
Judging unit, for judging the positive and negative of energy storage output power value；
Energy storage configuration capacity computing unit, for energy storage output power value to be added up summation for positive numerical value, record summed result
For sumpos, energy storage output power value is added up for negative numerical value and sums and negates, it is sum that record summation, which negates result,neg；
Energy storage configuration capacity acquiring unit, for comparing summed result sumposResult sum is negated with summationnegSize, when
sumpos>sumnegWhen, it is sum to set energy storage configuration capacitypos* △ t, work as sumpos≤sumnegWhen, setting energy storage configuration capacity is
sumneg*△t。
10. the stored energy capacitance configuration system of the power distribution network containing photovoltaic according to claim 6 or 7, it is characterised in that also wrap
Include：
Memory module, for the energy storage configuration capacity data of the power distribution network containing photovoltaic to be stored.
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| CN107959301B (en) * | 2017-12-06 | 2020-11-03 | 华南理工大学 | Distributed energy storage optimal configuration and operation method for low-voltage distribution network containing photovoltaic |
| CN108110791A (en) * | 2017-12-29 | 2018-06-01 | 西交利物浦大学 | Reduce the photovoltaic output power smooth control method and system of energy storage system capacity |
| CN108448612A (en) * | 2018-03-20 | 2018-08-24 | 国网江西省电力有限公司电力科学研究院 | A kind of echelon for energy storage utilizes lithium-ion-power cell capacity collocation method |
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| CN110556857A (en) * | 2019-06-10 | 2019-12-10 | 国网甘肃省电力公司定西供电公司 | distributed photovoltaic grid-connected point voltage calculation method based on current collection network model |
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Effective date of registration: 20231215 Address after: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Patentee after: SOUTH CHINA University OF TECHNOLOGY Address before: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. Patentee before: SOUTH CHINA University OF TECHNOLOGY |