CN105790308B - A kind of control method that solar photovoltaic generation system is incorporated into the power networks - Google Patents
A kind of control method that solar photovoltaic generation system is incorporated into the power networks Download PDFInfo
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- CN105790308B CN105790308B CN201610260608.7A CN201610260608A CN105790308B CN 105790308 B CN105790308 B CN 105790308B CN 201610260608 A CN201610260608 A CN 201610260608A CN 105790308 B CN105790308 B CN 105790308B
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- 238000000034 method Methods 0.000 title claims description 19
- 238000013178 mathematical model Methods 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- 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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- Feedback Control In General (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention provides a kind of control program that solar photovoltaic generation system is incorporated into the power networks, include the following steps: to build solar energy power generating experimental system first, wherein, the solar energy power generating experimental system includes that four groups of solar energy photovoltaic generators and a public load, four groups of solar energy photovoltaic generators with DC/DC current transformer provide electric energy jointly and use for the load；Secondly according to physics principle, the mathematical model of the solar energy power generating experimental system is established, which belongs to a tool, and there are four the interacted systems of nonlinearities system；Finally based on the mathematical model, distributing sample event trigger controller is devised, and gives the simulation test platform of system.The control program provided by the invention that is incorporated into the power networks can both guarantee micro-capacitance sensor safe and stable operation, and the communication data between each generator unit is substantially reduced.
Description
Technical field
The present invention is about a kind of design method that solar photovoltaic generation system is incorporated into the power networks.
Background technique
With the aggravation of environmental pollution, people start to increase the construction of new energy micro power network.Compare AC network, direct current
Power grid has electric energy efficiency of transmission high, removes the control of frequency from, docks the characteristics such as easy with DC load, is widely studied.So
And for the direct-current grid with multiple generation of electricity by new energy units and there is DC micro-electric composed by multiple direct-current grids
Group is netted, the stabilization of single electricity generation system is not can guarantee the stable operation of entire micro-capacitance sensor or micro-capacitance sensor group.In addition, DC/DC becomes
Stream device is widely used in direct-current grid, it has the non-linear of inherence.These situations make to entire direct-current grid or
The control of micro-capacitance sensor group becomes more difficult.
Summary of the invention
In view of the foregoing, it is necessary to a kind of control method that solar photovoltaic generation system is incorporated into the power networks is provided, it can be with
Effectively solve the above problems.
The present invention provides a kind of control method that solar photovoltaic generation system is incorporated into the power networks, and includes the following steps:
Solar energy power generating experimental system is built first, wherein the solar energy power generating experimental system includes four
Group photovoltaic generation unit and DC/DC current transformer and public load, four groups of solar energy photovoltaic generators are to described
Common load provides electric energy；
Secondly according to physics principle, the mathematical model of the solar energy power generating experimental system, the mathematical modulo are established
Type belongs to a tool, and there are four the interacted systems of nonlinearities system；
Finally based on the mathematical model, distributing sample event trigger controller is devised, and gives system
Simulation test platform.
The control method of solar photovoltaic power generation grid-connecting operation provided by the invention both can guarantee that micro-capacitance sensor safety and stability was transported
Row, and the communication data between each electricity generation system is substantially reduced.
Detailed description of the invention
Fig. 1 is that solar photovoltaic generation system is incorporated into the power networks the implementation steps figure of control method.
Fig. 2 is that solar photovoltaic generation system is incorporated into the power networks the structural schematic diagram of control method.
Fig. 3 is photovoltaic power generation grid-connecting running experiment platform.
Specific embodiment
Fig. 1 is please referred to, the present invention implements a kind of control method that solar photovoltaic generation system is incorporated into the power networks, including as follows
Step:
S1 builds solar photovoltaic generation system and is incorporated into the power networks system 100, wherein the photovoltaic power generation referring to figure 2.
System grid connection operating system 100 include four groups of solar energy power generating units (10,20,30,40) and DC/CD current transformer (11,
21,31,41) and a common load 50, four groups of solar energy power generating units by transmission line (13,23,33,
43) it powers jointly to common load 50；
S2 establishes the mathematical model that the solar photovoltaic generation system is incorporated into the power networks according to physics principle, the number
It learns model and belongs to the interacted system having there are four nonlinearities system；
S3 establishes the design method of distributing sample event triggering fuzzy controller based on the mathematical model.
In step sl, after four groups of solar energy power generating units (10,20,30,40) power generation, become by DC/DC
Device (11,21,31,41) regulation is flowed into the DC voltage with identical voltage class；Then, respectively by transmission line (13,23,
33,43) it powers jointly to common load 50.
In step s3, the mathematical model of every group of power generation sub-system such as formula (1):
Further, the parameter of system is selectedBecome as fuzzy former piece
After amount, then the solar energy power generating nonlinear system can be by T-S fuzzy model below come approximate expression:
Wherein
In step s3, the distributing fuzzy event trigger controller to be designed has following form,
WhereinτiIt is the delay of signal,WithThe system mode that the fuzzy former piece variable and controller for respectively indicating controller use becomes
Amount, and form is triggered with following event:
In step s3, the parameter of the distributing fuzzy event trigger controller is obtained by following method:
The distributing fuzzy event trigger controller (6) is rewritten first are as follows:
Wherein
In conjunction with formula (2) and (7), the Fuzzy control system of following closed loop is obtained:
In addition, definition
With
xi(v)=xi(t-ηi(t))-xi(t-τi). (10)
Based on the description above, the Fuzzy control system (10) of closed loop can be rewritten as follows:
Then consider following LKF function,
Have
Wherein Pi,Qi,Zi,WiIt is the matrix of symmetric positive definite.
After LKF function derivation, obtain:
By using Jensen inequality lemma, obtain:
Define matrixWith
We obtain following inequality transformation,
In addition, we have
Based on above description, Wo Menyou
Wherein
By using Schur lemma, inequality establishment below is implied that
Then, in order to which inequality (19) to be converted into the situation of linear matrix inequality, we are defined:
Following formula is solved by the tool box LMI of MATLAB, to obtain distributing fuzzy event trigger controller
Parameter:
WhereinIt is the symmetrical matrix of positive definite,It is positive scalar, and
So the parameter of distributing fuzzy event trigger controller calculates as follows:
It can further comprise the simulation test platform for building DSPACE referring to figure 3. after step S3.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (6)
1. a kind of control method that solar photovoltaic generation system is incorporated into the power networks, which comprises the steps of:
Build solar energy power generating experimental system, wherein the experimental system includes four groups of solar energy photovoltaic generators
With DC/DC current transformer and a common load, four groups of solar energy photovoltaic generators are that the load mentions jointly
For electric energy；
According to physics principle, the mathematical model of the solar energy power generating experimental system is established, which belongs to
One interacted system with four groups of nonlinearities systems, the mathematical model of every group of solar photovoltaic generation system such as formula (1):
Wherein { 1,2,3,4 } i=, for i-th of subsystem, vPV(i),v0(i)Respectively indicate solar photovoltaic generation system
Voltage, the electric current and capacitor C of inductance0(i)Voltage, R0(i), RL(i), Rline(i), RloadIt is capacitor C respectively0(i), inductance L(i),
The impedance on transportion wire road and load, VD(i)It is the forward voltage of current diode,It is the measurement electric current of load；
Based on the mathematical model, the design scheme of distributing fuzzy event trigger controller is designed.
2. a kind of control method that solar photovoltaic generation system is incorporated into the power networks as described in claim 1, which is characterized in that selection
The parameter of systemAfter fuzzy former piece variable, then photovoltaic is sent out
Electric nonlinear system can be by T-S fuzzy model below come approximate expression:
Wherein
3. a kind of control method that solar photovoltaic generation system is incorporated into the power networks as described in claim 1, which is characterized in that described
Distributing fuzzy event trigger controller has following form,
WhereinτiIt is the delay of signal,
WithThe system state variables that the fuzzy former piece variable and controller for respectively indicating controller use, and have such as
Under event trigger form:
4. a kind of control method that solar photovoltaic generation system is incorporated into the power networks as described in claim 1, which is characterized in that described
The parameter of distributing fuzzy event trigger controller is obtained by following method:
The distributing fuzzy event trigger controller (6) is rewritten first are as follows:
Wherein
In conjunction with formula (2) and (7), the Fuzzy control system of following closed loop is obtained:
In addition, definition
With
xi(v)=xi(t-ηi(t))-xi(t-τi) (10)
Based on the description above, the Fuzzy control system (10) of closed loop can be rewritten as follows:
Then consider following LKF function,
Have
Wherein Pi, Qi, Zi, WiIt is the matrix of symmetric positive definite；
After LKF function derivation, obtain:
By using Jensen inequality lemma, obtain:
Define matrix0 < M0≤MiWith
We obtain following inequality transformation,
In addition, we have
Based on above description, Wo Menyou
Wherein
By using Schur lemma, inequality establishment below is implied that
Then, in order to which inequality (19) to be converted into the situation of linear matrix inequality, we are defined:
5. a kind of control method that solar photovoltaic generation system is incorporated into the power networks as claimed in claim 4, which is characterized in that pass through
The tool box LMI of MATLAB solves following formula, to obtain the parameter of distributing fuzzy event trigger controller:
WhereinIt is the symmetrical matrix of positive definite,It is positive scalar, and
So the parameter of distributing fuzzy event trigger controller calculates as follows:
6. a kind of control method that solar photovoltaic generation system is incorporated into the power networks as described in claim 1, which is characterized in that into one
Step includes building the simulation test platform of DSPACE.
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| CN107863769B (en) * | 2017-11-13 | 2019-12-24 | 厦门理工学院 | Design method for grid-connected operation of direct-current micro-grid system |
| CN110011421B (en) * | 2019-04-28 | 2020-07-07 | 闽江学院 | Self-triggering energy internet power router network control method |
| CN111884217B (en) * | 2020-07-30 | 2022-10-14 | 海南电网有限责任公司海口供电局 | Single-machine infinite electric power system optimization control method based on T-S model |
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Inventor after: Sun Yuan Inventor after: Zhong Zhixiong Inventor after: Shao Zhenhua Inventor after: Zeng Jianbin Inventor after: Xu Min Inventor after: Chen Xijun Inventor after: Chen Wenta Inventor before: Zhong Zhixiong Inventor before: Shao Zhenhua Inventor before: Sun Yuan Inventor before: Zeng Jianbin Inventor before: Xu Min Inventor before: Chen Xijun Inventor before: Chen Wenta |