CN104485685A - Solar and storage integrated self-balancing control method and system applicable to distribution network - Google Patents
Solar and storage integrated self-balancing control method and system applicable to distribution network Download PDFInfo
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- CN104485685A CN104485685A CN201410692584.3A CN201410692584A CN104485685A CN 104485685 A CN104485685 A CN 104485685A CN 201410692584 A CN201410692584 A CN 201410692584A CN 104485685 A CN104485685 A CN 104485685A
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Classifications
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The invention discloses solar and storage integrated self-balancing control method applicable to a distribution network. The method comprises the steps of measuring alternating-current voltage, alternating current, direct-current voltage and energy storage voltage of each solar and storage integrated module; respectively conducting active control and reactive control to each solar and storage integrated module to obtain u<dg> and u<qg>; obtaining three-phase inverter control quantities u<ag>, u<bg> and u<cg> according to the obtained u<dg> and u<qg>; controlling a grid-connected inverter unit in each solar and storage integrated module according to the three-phase inversion control quantities u<ag>, u<bg> and u<cg> corresponding to each solar and storage integrated module. Correspondingly, the invention further discloses a solar and storage integrated self-balancing control system applicable to a distribution network.
Description
Technical field
The present invention relates to control method and the system of a kind of light storage integration, particularly relate to self-balancing control method and the system of a kind of light storage integration.
Background technology
Rationally, develop by leaps and bounds regenerative resource, is the fundamental way solving China's energy shortage, problem of environmental pollution.Distributed power generation maximizes with energy resource, efficiency of energy utilization optimum turns to the novel energy system of target, there is good environmental benefit, there is small investment, take up an area little, the feature such as the construction period is short, energy-saving and environmental protection, its peak period powers more more economical than centrally connected power supply, effective, therefore distributed power generation can be used as the useful supplement of China's centrally connected power supply.Distributed power generation can be used as stand-by power supply and provides electric power for peak load, improves power supply reliability; Can be outlying district user, shopping centre and resident to power; Can be used as construction cost and the investment of local power supply saving power transmission and transformation, improve energy resource structure, promote electric power energy sustainable development; Can according to user's request, many services is provided in electric power system practical application, comprise generating for subsequent use, peak clipping capacity, the generating of base lotus or meet region heat and electrical load requirement as cogeneration system simultaneously, and the assistant service such as reactive power support, voltage support, automatic generation control, black starting-up and spinning reserve.
Distributed power generation refers to: in order to meet the needs of specific user, on-the-spot or to be configured voluntarily by user or the generating set compared with low capacity of Independent power producer investment near electricity consumption is on-the-spot user.It both directly can provide electric energy to user independent of public network, and also accessible electrical network, provides electric energy to user jointly with public electric wire net.It has following characteristics: small and be distributed near load; Meet the demand of some special users, support the economical operation of existing distribution; Without planning or the electrical production mode of non-central schedule type; Efficiency of energy utilization is higher or utilize renewable energy power generation etc.
Rapidly, large-scale distributed photovoltaic, energy storage access cause certain impact to distribution to the development of distributed photovoltaic, energy storing and electricity generating, and in order to stabilize the fluctuation of distributed power generation, light storage integration is the mode utilizing solar energy, energy storing and electricity generating preferably.But when after numerous light storage integrated apparatus access distribution, their control each other there are differences, quantity of state between them there are differences, the benefit of light storage integrated apparatus access distribution can be affected.
Summary of the invention
The object of the present invention is to provide a kind of self-balancing control method being applicable to the light storage integration of distribution, the method can make each light storage integrated module of distribution automatically realize the consistency of quantity of state, thus the benefit of Appropriate application each light storage integrated module, improve distribution operation level.
Another object of the present invention is to provide a kind of Self-balance Control System being applicable to the light storage integration of distribution, this system can be applied said method and reach above-mentioned functions.
To achieve these goals, the present invention proposes a kind of self-balancing control method being applicable to the light storage integration of distribution, it comprises step:
Measure the alternating voltage u of each light storage integrated module
abc, alternating current i
abc, measure the direct voltage u of each light storage integrated module
dc, measure the tank voltage u of each light storage integrated module
b; From alternating voltage u
abcobtain the amplitude u of alternating voltage
sand phase theta; From alternating current i
abcobtain the meritorious amplitude i of alternating current
dg, idle amplitude i
qg; By i
qgwith the amplitude u of alternating voltage
sobtain the measured value Q of reactive power
g;
Real power control and idle control are carried out to each light storage integrated module, wherein:
Real power control step comprises: by direct voltage set-point U*
dcwith ∑ a
ij(u
bi-u
bj) be added obtain and with dc voltage measurements u
dcdo difference, this difference exports the first output valve after outer shroud proportional plus integral control, by described first output valve and i
dgdo difference, its difference exports the second output valve through inner ring proportional plus integral control, by this second output valve and alternating voltage amplitude u
sbe added, obtain u
dg;
Idle rate-determining steps comprises: by the set-point Q* of reactive power
gwith ∑ a
ij(u
si-u
sj) be added obtain and with the measured value Q of described reactive power
gdo difference, this difference exports the 3rd output valve after outer shroud proportional plus integral control; By described 3rd output valve and i
qgdo difference, its difference exports u after inner ring proportional integral
qg;
The ud that above-mentioned steps is obtained
gand u
qgcarry out dq/abc coordinate transform, obtain three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cg; Dq/abc coordinate transform is as follows:
Three-phase inversion controlled quentity controlled variable u corresponding to integrated module is stored up according to each light
ag, u
bg, u
cgparallel network reverse unit in each light storage integrated module is controlled;
Wherein, u
bi, u
bjbe respectively the described tank voltage u of corresponding i-th light storage integrated module and a jth light storage integrated module
bparameter, u
si, u
sjbe respectively the amplitude u of the described alternating voltage of corresponding i-th light storage integrated module and a jth light storage integrated module
sparameter, a
ijrepresent that a jth light storage integrated module passes to the weight added by information of i-th light storage integrated module.
In technical solutions according to the invention, above-mentioned weight a
ijvalue, can a be made
ij=1/n, wherein n represents the total quantity of light storage integrated module, and that is, the weight that each light storage integrated module applies is all equal.
In addition, also a can be determined like this
ij:
With the dc voltage measurements of each light storage integrated module and direct voltage set-point difference sum minimum for target:
Wherein constraints is:
Minimum according to above-mentioned capacity volume variance summation is target, according to constraints, determines corresponding weight coefficient.
The self-balancing control method of the light storage integration being applicable to distribution of the present invention, for controlling the consistent of quantity of state in distribution between each light storage integrated module, improves distribution operation level.During each light storage integrated module access distribution, its output is interconnected and is connected to AC network, within ring proportional integral, outer shroud proportional integral and dq/abc coordinate are transformed to control device, control the parallel network reverse unit of each light storage integrated module based on the tank voltage difference between given direct voltage and each light storage integrated module, and the alternating voltage amplitude difference between given reactive power and each light storage integrated module exports, finally meet given, eliminating differences, thus while realizing light storage integrated module normally running, automatically each light storage tank voltage of integrated module and the balance of access point voltage is achieved, and the quantity of state of each light storage integrated module is consistent.
Preferably, in the self-balancing control method of the light storage integration being applicable to distribution of the present invention, the proportionality coefficient of described inner ring proportional plus integral control is 1 < proportionality coefficient < 10, and the integral coefficient of inner ring proportional plus integral control is 0.1 < integral coefficient < 1.
Preferably, in the self-balancing control method of the light storage integration being applicable to distribution of the present invention, the proportionality coefficient of described outer shroud proportional plus integral control is 0.2 < proportionality coefficient < 1, and the integral coefficient of outer shroud proportional plus integral control is 0.01 < integral coefficient < 0.1.
Correspondingly, present invention also offers a kind of Self-balance Control System being applicable to the light storage integration of distribution, it comprises several light storage integrated module, and each light storage integrated module includes:
Photovoltaic cell, light energy conversion is that electric energy exports by it;
DC boosting unit, its direct-flow input end is connected with the output of photovoltaic cell;
Energy-storage units, it exports electric energy;
Charge/discharge unit, it is connected with the output of described energy-storage units, and the DC output end of described charge/discharge unit is connected with the DC output end of DC boosting unit;
Parallel network reverse unit, its DC bus is connected with the described DC output end of DC boosting unit and the DC output end of charge/discharge unit, and the ac output end of parallel network reverse unit is for connecting distribution;
DC voltage detecting device, it is connected with the DC output end of DC boosting unit, to detect direct voltage u
dc;
AC current detection device, it is serially connected with the ac output end of described parallel network reverse unit, to detect the alternating current i that it exports
abc;
Alternating voltage checkout gear, it is connected with the ac output end of described parallel network reverse unit, to detect the alternating voltage u that it exports
abc;
Tank voltage checkout gear, it is connected with the output of described energy-storage units, to detect tank voltage ub;
Controller, it is connected with described DC voltage detecting device, AC current detection device, alternating voltage checkout gear and tank voltage checkout gear respectively, and described controller is also connected with DC boosting unit, charge/discharge unit and parallel network reverse unit;
Described controller carries out real power control and idle control, wherein when real power control to parallel network reverse unit: by direct voltage set-point U*
dcwith ∑ a
ij(u
bi-u
bj) be added obtain and with dc voltage measurements u
dcdo difference, this difference exports the first output valve after outer shroud proportional plus integral control, by described first output valve and according to i
abcthe meritorious amplitude i of the alternating current obtained
dgdo difference, its difference exports the second output valve through inner ring proportional plus integral control, by this second output valve and according to alternating voltage u
abcthe amplitude u of the alternating voltage obtained
sbe added, obtain u
dg; When idle control: by the set-point Q* of reactive power
gwith ∑ a
ij(u
si-u
sj) be added obtain and with the measured value Q of reactive power
gdo difference, its difference exports the 3rd output valve after outer shroud proportional plus integral control; By described 3rd output valve and according to i
abcthe idle amplitude i of the alternating current obtained
qgdo difference, its difference exports u after inner ring proportional integral
qg; Described controller is according to u
dgand u
qgobtain three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cg; Described controller is according to three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cgparallel network reverse unit is controlled; Wherein, u
bi, u
bjbe respectively the described tank voltage u of corresponding i-th light storage integrated module and a jth light storage integrated module
bparameter, u
si, u
sjbe respectively the amplitude u of the described alternating voltage of corresponding i-th light storage integrated module and a jth light storage integrated module
sparameter, a
ijrepresent that a jth light storage integrated module passes to the weight added by information of i-th light storage integrated module.
The each self-corresponding each controller of described several light storage integrated module each other communication connects.
The Self-balance Control System being applicable to the light storage integration of distribution of the present invention, AC network is connected to during work, while normally can running realizing light storage integrated module, automatically realize each light storage tank voltage of integrated module and the balance of access point voltage, and the quantity of state of each light storage integrated module is consistent.Its control principle and said method are identical, do not repeat them here.
Further, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, described controller comprises digital signal processor.
Further, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, described DC voltage detecting device comprises direct current voltage sensor.
Further, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, described alternating voltage checkout gear comprises AC voltage transformer.
Further, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, described AC current detection device comprises AC current sensor.
Further, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, described tank voltage checkout gear is tank voltage transducer.
Further, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, described energy-storage units comprises storage battery or super capacitor.
Preferably, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, the proportionality coefficient of described inner ring proportional plus integral control is 1 < proportionality coefficient < 10, and the integral coefficient of inner ring proportional plus integral control is 0.1 < integral coefficient < 1.
Preferably, in the Self-balance Control System of the light storage integration being applicable to distribution of the present invention, the proportionality coefficient of described outer shroud proportional plus integral control is 0.2 < proportionality coefficient < 1, and the integral coefficient of outer shroud proportional plus integral control is 0.01 < integral coefficient < 0.1.
The light being applicable to distribution of the present invention stores up the self-balancing control method of integration compared with prior art, has following beneficial effect:
1) each light automatically achieving distributed access distribution stores up the consistency of quantity of state between integrated module;
2) improve distribution operation level;
3) benefit of Appropriate application light storage integrated module.
The Self-balance Control System being applicable to the light storage integration of distribution of the present invention has above-mentioned effect equally.
Accompanying drawing explanation
Fig. 1 is the structural representation of Self-balance Control System under a kind of execution mode being applicable to the light storage integration of distribution of the present invention.
Fig. 2 is the topological diagram being applicable to the DC boosting unit of Self-balance Control System under a kind of execution mode of the light storage integration of distribution of the present invention.
Fig. 3 is the topological diagram being applicable to the parallel network reverse unit of Self-balance Control System under a kind of execution mode of the light storage integration of distribution of the present invention.
Fig. 4 is the topological diagram being applicable to the charge/discharge unit of Self-balance Control System under a kind of execution mode of the light storage integration of distribution of the present invention.
Fig. 5 is the control principle drawing of self-balancing control method under a kind of execution mode being applicable to the light storage integration of distribution of the present invention.
Embodiment
The self-balancing control method being applicable to the light storage integration of distribution to of the present invention below in conjunction with Figure of description and specific embodiment and system make further explanation.
Fig. 1 illustrates the structure of Self-balance Control System under a kind of execution mode being applicable to the light storage integration of distribution of the present invention.As shown in Figure 1, the Self-balance Control System being applicable to the light storage integration of distribution in the present embodiment is connected to when working and exchanges distribution 11, it comprises: several light that communication connects each other store up integrated module, and each light storage integrated module includes: photovoltaic cell 7, DC boosting unit 2, its direct-flow input end is connected with the output of photovoltaic cell 7, storage battery 12, charge/discharge unit 13, it is connected with the output of storage battery 12, and the DC output end of charge/discharge unit 13 is connected with the DC output end of DC boosting unit 2, parallel network reverse unit 3, its DC bus is connected with the DC output end of DC boosting unit 2 and the DC output end of charge/discharge unit 13, and its ac output end is connected with the ac bus 8 exchanging distribution 11, direct current voltage sensor 6, it is connected with the DC output end of DC boosting unit 2, to detect the direct voltage u that DC boosting unit 2 exports
dc, AC current sensor 5, it is serially connected with the ac output end of parallel network reverse unit 3, to detect the alternating current i that it exports
abc, AC voltage transformer 4, it is connected with the ac output end of parallel network reverse unit 3, to detect the alternating voltage u that it exports
abc, tank voltage transducer 14, it is connected with the output of storage battery 12, to detect tank voltage u
b, comprise the controller 1 of digital signal processor, the DC voltage input end of controller 1 is connected with the output of direct current voltage sensor 6, the alternating current input of controller 1 is connected with the output of AC current sensor 5, the ac voltage input of controller 1 is connected with the output of AC voltage transformer 4, another DC voltage input end of controller 1 is connected with the output of tank voltage transducer 14, in addition, the control end that the DC boosting control end of controller 1 is corresponding to DC boosting unit 2 connects, the control end that the parallel network reverse control end of controller 1 is corresponding to parallel network reverse unit 3 connects, the control end that the charge and discharge control end of controller 1 is corresponding to charge/discharge unit 13 connects.
Fig. 2 shows the topological structure of the DC boosting unit 2 of the present embodiment.As shown in Figure 2, the DC boosting unit 2 of the present embodiment comprises triode 21, diode 22, reactor 23 and electric capacity 24, and as shown in the figure, it is input as direct current input VI to connected mode, and it exports as direct current exports VO.
Fig. 3 shows the topological structure of the parallel network reverse unit 3 of the present embodiment.As shown in Figure 3, the parallel network reverse unit 3 of the present embodiment comprises six triodes 31, connected mode as shown in the figure, its be input as DC bus positive pole+and DC bus negative pole-, it exports and exports AO for exchanging.
Fig. 4 shows the topological structure of the charge/discharge unit 13 of the present embodiment.As shown in Figure 2, the charge/discharge unit 13 of the present embodiment comprises triode 131, diode 132, reactor 133 and electric capacity 134, and as shown in the figure, it exports as direct current exports VO connected mode.
Fig. 5 gives the control principle of self-balancing control method under a kind of execution mode of the light storage integration being applicable to distribution of the present invention, the control principle that the controller 1 of this control principle and the present embodiment adopts.
In conjunction with reference to figure 1-5, during the present embodiment work, first, controller 1 carries out initialization, and all power, voltage and current parameters adopt perunit value, sets following parameter, comprises and sets direct voltage set-point U*
dc, reactive power set-point Q*
g, parallel network reverse unit 3 filter inductance value L
g, inner ring proportional integral PI control proportionality coefficient (1 ~ 10), inner ring proportional integral PI control integral coefficient (0.1 ~ 1); The proportionality coefficient (0.2 ~ 1) that outer shroud proportional integral PI controls, the integral coefficient (0.01 ~ 0.1) that outer shroud proportional integral PI controls; State difference value weight coefficient a
ij(0 ~ 1).Afterwards, the alternating voltage u of each light storage integrated module obtained in distribution measured by controller 1 by AC voltage transformer 4, AC current sensor 5, direct current voltage sensor 6 and tank voltage transducer 14
abc, alternating current i
abc, direct voltage u
dcwith tank voltage u
b; From alternating voltage u
abcobtain the amplitude u of alternating voltage
s, alternating current phase theta; From alternating current i
abcobtain the meritorious amplitude i of alternating current
dg, idle amplitude i
qg; By i
qgwith the amplitude u of alternating voltage
sobtain the measured value Q of reactive power
g.Controller 1 carries out output to each light storage integrated module and controls, comprise and control each light storage integrated module by parallel network reverse unit 3 to distribution feed-in electric energy, carry out maximal power tracing control, pass through charge and discharge control, smoothing to photoelectricity, make the electric energy being injected into distribution steady; Also comprise and self-balancing control is carried out to each light storage integrated module, eliminate the difference of quantity of state between adjacent light storage integrated module.Above-mentioned control comprises carries out real power control and idle control, wherein when real power control to parallel network reverse unit 3: by direct voltage set-point U*
dcwith ∑ a
ij(u
bi-u
bj) be added obtain and with dc voltage measurements u
dcdo difference, this difference exports the first output valve after outer shroud proportional plus integral control, by this first output valve and according to i
abcthe meritorious amplitude i of the alternating current obtained
dgdo difference, its difference exports the second output valve through inner ring proportional plus integral control, by this second output valve and according to alternating voltage u
abcthe amplitude u of the alternating voltage obtained
sbe added, obtain u
dg; When idle control: by the set-point Q* of reactive power
gwith ∑ a
ij(u
si-u
sj) be added obtain and with the measured value Q of reactive power
gdo difference, its difference exports the 3rd output valve after outer shroud proportional plus integral control; By described 3rd output valve and according to i
abcthe idle amplitude i of the alternating current obtained
qgdo difference, its difference exports u after inner ring proportional integral
qg; Controller 1 couple of u
dgand u
qgcarry out dq/abc coordinate transform and obtain three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cg; Controller 1 is according to three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cgparallel network reverse unit 3 is controlled; Wherein, u
bi, u
bjbe respectively the tank voltage u of corresponding i-th light storage integrated module and a jth light storage integrated module
bparameter, if each light storage integrated module tank voltage there is deviation, then u
bi≠ u
bj; u
si, u
sjbe respectively the amplitude u of the alternating voltage of corresponding i-th light storage integrated module and a jth light storage integrated module
sparameter, if each light storage integrated module access point voltage there is deviation, then u
si≠ u
sj; a
ijrepresent that a jth light storage integrated module passes to the weight added by information of i-th light storage integrated module, when a jth light storage integrated module is not to i-th light storage integrated module transmission information, a
ij=0.
Above-mentioned dq/abc coordinate transform is as follows:
In the present embodiment, a
ijadopt following method to determine: with the dc voltage measurements of each light storage integrated module and direct voltage set-point capacity volume variance sum minimum for target:
Wherein constraints is:
Minimum according to above-mentioned capacity volume variance summation is target, according to constraints, determines corresponding weight coefficient.
That enumerates it should be noted that above is only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, has many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed by the invention or associates, protection scope of the present invention all should be belonged to.
Claims (13)
1. be applicable to a self-balancing control method for the light storage integration of distribution, it is characterized in that, comprise step:
Measure the alternating voltage u of each light storage integrated module
abc, alternating current i
abc, measure the direct voltage u of each light storage integrated module
dc, measure the tank voltage u of each light storage integrated module
b; From alternating voltage u
abcobtain the amplitude u of alternating voltage
sand phase theta; From alternating current i
abcobtain the meritorious amplitude i of alternating current
dg, idle amplitude i
qg; By i
qgwith the amplitude u of alternating voltage
sobtain the measured value Q of reactive power
g;
Real power control and idle control are carried out to each light storage integrated module, wherein:
Real power control step comprises: by direct voltage set-point U
* dcwith ∑ a
ij(u
bi-u
bj) be added obtain and with dc voltage measurements u
dcdo difference, this difference exports the first output valve after outer shroud proportional plus integral control, by described first output valve and i
dgdo difference, its difference exports the second output valve through inner ring proportional plus integral control, by this second output valve and alternating voltage amplitude u
sbe added, obtain u
dg;
Idle rate-determining steps comprises: by the set-point Q of reactive power
* gwith ∑ a
ij(u
si-u
sj) be added obtain and with the measured value Q of described reactive power
gdo difference, this difference exports the 3rd output valve after outer shroud proportional plus integral control; By described 3rd output valve and i
qgdo difference, its difference exports u after inner ring proportional integral
qg;
The u that above-mentioned steps is obtained
dgand u
qgcarry out dq/abc coordinate transform, obtain three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cg; Dq/abc coordinate transform is as follows:
Three-phase inversion controlled quentity controlled variable u corresponding to integrated module is stored up according to each light
ag, u
bg, u
cgparallel network reverse unit in each light storage integrated module is controlled;
Wherein, u
bi, u
bjbe respectively the described tank voltage u of corresponding i-th light storage integrated module and a jth light storage integrated module
bparameter, u
si, u
sjbe respectively the amplitude u of the described alternating voltage of corresponding i-th light storage integrated module and a jth light storage integrated module
sparameter, a
ijrepresent that a jth light storage integrated module passes to the weight added by information of i-th light storage integrated module.
2. be applicable to the self-balancing control method of the light storage integration of distribution as claimed in claim 1, it is characterized in that, a
ijdefining method be: with the dc voltage measurements u of each light storage integrated module
dcwith direct voltage set-point U
* dccapacity volume variance sum minimum be target:
Constraints is:
Minimum for target with above-mentioned capacity volume variance summation, according to constraints, determine corresponding weight coefficient a
ij.
3. be applicable to the self-balancing control method of the light storage integration of distribution as claimed in claim 1, it is characterized in that, the proportionality coefficient of described inner ring proportional plus integral control is 1 < proportionality coefficient < 10, and the integral coefficient of inner ring proportional plus integral control is 0.1 < integral coefficient < 1.
4. be applicable to the self-balancing control method of the light storage integration of distribution as claimed in claim 1, it is characterized in that, the proportionality coefficient of described outer shroud proportional plus integral control is 0.2 < proportionality coefficient < 1, and the integral coefficient of outer shroud proportional plus integral control is 0.01 < integral coefficient < 0.1.
5. be applicable to a Self-balance Control System for the light storage integration of distribution, it is characterized in that, comprise several light storage integrated module, each light storage integrated module includes:
Photovoltaic cell, light energy conversion is that electric energy exports by it;
DC boosting unit, its direct-flow input end is connected with the output of photovoltaic cell;
Energy-storage units, it exports electric energy;
Charge/discharge unit, it is connected with the output of described energy-storage units, and the DC output end of described charge/discharge unit is connected with the DC output end of DC boosting unit;
Parallel network reverse unit, its DC bus is connected with the described DC output end of DC boosting unit and the DC output end of charge/discharge unit, and the ac output end of parallel network reverse unit is for connecting distribution;
DC voltage detecting device, it is connected with the DC output end of DC boosting unit, to detect direct voltage u
dc;
AC current detection device, it is serially connected with the ac output end of described parallel network reverse unit, to detect the alternating current i that it exports
abc;
Alternating voltage checkout gear, it is connected with the ac output end of described parallel network reverse unit, to detect the alternating voltage u that it exports
abc;
Tank voltage checkout gear, it is connected with the output of described energy-storage units, to detect tank voltage u
b;
Controller, it is connected with described DC voltage detecting device, AC current detection device, alternating voltage checkout gear and tank voltage checkout gear respectively, and described controller is also connected with DC boosting unit, charge/discharge unit and parallel network reverse unit;
Described controller carries out real power control and idle control, wherein when real power control to parallel network reverse unit: by direct voltage set-point U
* dcwith ∑ a
ij(u
bi-u
bj) be added obtain and with dc voltage measurements u
dcdo difference, this difference exports the first output valve after outer shroud proportional plus integral control, by described first output valve and according to i
abcthe meritorious amplitude i of the alternating current obtained
dgdo difference, its difference exports the second output valve through inner ring proportional plus integral control, by this second output valve and according to alternating voltage u
abcthe amplitude u of the alternating voltage obtained
sbe added, obtain u
dg; When idle control: by the set-point Q of reactive power
* gwith ∑ a
ij(u
si-u
sj) be added obtain and with the measured value Q of reactive power
gdo difference, its difference exports the 3rd output valve after outer shroud proportional plus integral control; By described 3rd output valve and according to i
abcthe idle amplitude i of the alternating current obtained
qgdo difference, its difference exports u after inner ring proportional integral
qg; Described controller is according to u
dgand u
qgobtain three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cg; Described controller is according to three-phase inversion controlled quentity controlled variable u
ag, u
bg, u
cgparallel network reverse unit is controlled; Wherein, u
bi, u
bjbe respectively the described tank voltage u of corresponding i-th light storage integrated module and a jth light storage integrated module
bparameter, u
si, u
sjbe respectively the amplitude u of the described alternating voltage of corresponding i-th light storage integrated module and a jth light storage integrated module
sparameter, a
ijrepresent that a jth light storage integrated module passes to the weight added by information of i-th light storage integrated module;
The each self-corresponding each controller of described several light storage integrated module each other communication connects.
6. be applicable to the Self-balance Control System of the light storage integration of distribution as claimed in claim 5, it is characterized in that, described controller comprises digital signal processor.
7. be applicable to the Self-balance Control System of the light storage integration of distribution as claimed in claim 5, it is characterized in that, described DC voltage detecting device comprises direct current voltage sensor.
8. be applicable to the Self-balance Control System of the light storage integration of distribution as claimed in claim 5, it is characterized in that, described alternating voltage checkout gear comprises AC voltage transformer.
9. be applicable to the Self-balance Control System of the light storage integration of distribution as claimed in claim 5, it is characterized in that, described AC current detection device comprises AC current sensor.
10. be applicable to the Self-balance Control System of the light storage integration of distribution as claimed in claim 5, it is characterized in that, described tank voltage checkout gear is tank voltage transducer.
11. light being applicable to distribution as claimed in claim 5 store up the Self-balance Control System of integration, and it is characterized in that, described energy-storage units comprises storage battery or super capacitor.
12. light being applicable to distribution as claimed in claim 5 store up the Self-balance Control System of integration, it is characterized in that, the proportionality coefficient of described inner ring proportional plus integral control is 1 < proportionality coefficient < 10, and the integral coefficient of inner ring proportional plus integral control is 0.1 < integral coefficient < 1.
13. light being applicable to distribution as claimed in claim 5 store up the Self-balance Control System of integration, it is characterized in that, the proportionality coefficient of described outer shroud proportional plus integral control is 0.2 < proportionality coefficient < 1, and the integral coefficient of outer shroud proportional plus integral control is 0.01 < integral coefficient < 0.1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244907A (en) * | 2015-09-23 | 2016-01-13 | 上海载物能源科技有限公司 | Plug-and-play solar optical recording integration control system and method |
| CN107196328A (en) * | 2017-05-03 | 2017-09-22 | 国家电网公司 | A kind of power distribution network light stores up association system access point vulnerability index forecasting method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570489A (en) * | 2012-02-29 | 2012-07-11 | 中国南方电网有限责任公司调峰调频发电公司 | Dynamic power coordination control method for battery energy storage system |
| CN103023021A (en) * | 2012-11-27 | 2013-04-03 | 上海电气集团股份有限公司 | Decoupling control method for nonlinear power of double-fed wind power generation system |
| CN103051002A (en) * | 2013-01-13 | 2013-04-17 | 东北电力大学 | Optical storage combination combined-grid power generation coordination control method |
| CN103346583A (en) * | 2013-04-15 | 2013-10-09 | 湖南大学 | Fixed-frequency direct-power PWM converter controlling method having rapid power response capability |
| CN103457287A (en) * | 2013-05-17 | 2013-12-18 | 湖南大学 | Multi-terminal VSC-HVDC grid-connected transmission system controlling method applied to wind power plant |
| CN104143829A (en) * | 2014-07-28 | 2014-11-12 | 北方工业大学 | Method and device for controlling direct current of PWM rectifier |
| CN104485679B (en) * | 2014-11-26 | 2016-12-07 | 上海载物能源科技有限公司 | It is applicable to self-balancing control method and the system of the wind storage integration of distribution |
-
2014
- 2014-11-26 CN CN201410692584.3A patent/CN104485685B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570489A (en) * | 2012-02-29 | 2012-07-11 | 中国南方电网有限责任公司调峰调频发电公司 | Dynamic power coordination control method for battery energy storage system |
| CN103023021A (en) * | 2012-11-27 | 2013-04-03 | 上海电气集团股份有限公司 | Decoupling control method for nonlinear power of double-fed wind power generation system |
| CN103051002A (en) * | 2013-01-13 | 2013-04-17 | 东北电力大学 | Optical storage combination combined-grid power generation coordination control method |
| CN103346583A (en) * | 2013-04-15 | 2013-10-09 | 湖南大学 | Fixed-frequency direct-power PWM converter controlling method having rapid power response capability |
| CN103457287A (en) * | 2013-05-17 | 2013-12-18 | 湖南大学 | Multi-terminal VSC-HVDC grid-connected transmission system controlling method applied to wind power plant |
| CN104143829A (en) * | 2014-07-28 | 2014-11-12 | 北方工业大学 | Method and device for controlling direct current of PWM rectifier |
| CN104485679B (en) * | 2014-11-26 | 2016-12-07 | 上海载物能源科技有限公司 | It is applicable to self-balancing control method and the system of the wind storage integration of distribution |
Non-Patent Citations (1)
| Title |
|---|
| 毕大强，车晓春，任先文，薛雷: "含多微源的微电网控制策略设计", 《高电压技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244907A (en) * | 2015-09-23 | 2016-01-13 | 上海载物能源科技有限公司 | Plug-and-play solar optical recording integration control system and method |
| CN105244907B (en) * | 2015-09-23 | 2018-01-19 | 上海载物能源科技有限公司 | The solar energy storage integral control system and method for a kind of plug and play |
| CN107196328A (en) * | 2017-05-03 | 2017-09-22 | 国家电网公司 | A kind of power distribution network light stores up association system access point vulnerability index forecasting method |
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|---|---|
| CN104485685B (en) | 2017-10-10 |
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