CN108281969A - The STATCOM method of adaptive fuzzy sliding mode control of windy bavin system - Google Patents
The STATCOM method of adaptive fuzzy sliding mode control of windy bavin system Download PDFInfo
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- CN108281969A CN108281969A CN201711347979.XA CN201711347979A CN108281969A CN 108281969 A CN108281969 A CN 108281969A CN 201711347979 A CN201711347979 A CN 201711347979A CN 108281969 A CN108281969 A CN 108281969A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
-
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention relates to a kind of STATCOM method of adaptive fuzzy sliding mode control of windy bavin system, include the following steps：S1 establishes the windy bavin hybrid power system of isolated island, and STATCOM participates in Reactive-power control in the electric system；S2 designs sliding formwork voltage controller based on Adaptive Fuzzy Sliding Mode Control；S3, the sliding formwork voltage controller to obtain optimize the voltage deviation of electric system as control instruction.Compared with prior art, STATCOM participates in system voltage adjusting in the present invention, and diesel engine output reactive power is made to reduce, and STATCOM outputs are idle to substantially meet system requirements, ensures each region reactive power equilibrium, to effectively reduce the voltage deviation in each region.
Description
Technical field
The present invention relates to a kind of control methods of the windy bavin hybrid power system of isolated island, more particularly, to a kind of windy bavin system
The STATCOM method of adaptive fuzzy sliding mode control of system.
Background technology
Voltage is one of the important indicator for reflecting power system security stable operation, and the operation voltage level of electric system takes
Certainly in the balance of reactive power, electric system is under the different methods of operation, it is possible that reactive power is insufficient or idle
The case where power surplus, should make overall plans when taking indemnifying measure, and selection can be sent out but also the benefit of absorbing reactive power
Equipment is repaid, STATCOM is as a kind of common parallel flexible AC transmission equipment, by injecting perception in real time to power grid or holding
Property reactive power to quickly inhibiting voltage fluctuation, while stability for further increasing electric system can be controlled it.
Currently, wind energy is a kind of inexhaustible clean reproducible energy, extensive scholar and expert are received
Concern, the proportion shared by wind-power electricity generation amount is also increasing year by year.But wind energy has intermittence, can cause in electric system
Voltage stability, will appear voltage deviation so as to cause system.It, will to reduce influence of the system voltage fluctuation to production and living
System voltage control be in allowed limits very it is necessary to.
When reactive power drastically shortage occurs in electric system, frequency will fluctuate widely, and allow fluctuation beyond it
Range.Therefore, it is necessary to design a kind of voltage controller, make always by voltage fluctuation control in allowed limits.
System voltage controls the extensive concern for having caused domestic and foreign scholars, document Adaptive modulation for
It is mutual that DFIG and STATCOM with high-voltage direct current transmission are based on high voltage direct current
Two sound zone systems of connection use target dynamic planning algorithm regulating system parameter, improve transient stability of the system under failure,
But the model of STATCOM is idealized partially.Document Dynamic stability improvement of four parallel-
operated PMSG-based offshore wind turbine generators fed to a power system
Using a STATCOM are directed to the marine wind electric field of 4 paired runnings, are hindered using the PID of Model control Theoretical Design STATCOM
Buddhist nun's controller, enhances the dynamic stability of system, but the multigroup characteristic root for calculating system is needed to select optimal solution, process
Show slightly cumbersome.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of windy bavin systems
STATCOM method of adaptive fuzzy sliding mode control.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of STATCOM method of adaptive fuzzy sliding mode control of windy bavin system, includes the following steps：
S1 establishes the windy bavin hybrid power system of isolated island, and STATCOM participates in Reactive-power control in the electric system；
S2 designs sliding formwork voltage controller based on Adaptive Fuzzy Sliding Mode Control；
S3, the sliding formwork voltage controller to obtain optimize the voltage deviation of electric system as control instruction.
Further, in the step S1, consider the uncertainty of parameters of electric power system, establish the windy bavin mixing electricity of isolated island
The state model of Force system：
Wherein, x (t) is state variable, and variable, β (t) are external disturbance item to u (t) in order to control, and y (t) is output variable, A
For sytem matrix, B is input matrix, and C is output matrix, and F is disturbance term coefficient matrix, and Δ A, Δ F are corresponding with A, F respectively
The indeterminate of wind bavin parameters of electric power system；
Indeterminate is assembled in definition：
G (t, x)=Δ Ax (t), Γ β (t)=(F+ Δ F) β (t)
It obtains containing the System State Model for assembling indeterminate：
Further, the step S2 by it is assumed hereinafter that based on：
A) (A, B) controllably, (A, C) is considerable, Matrix C=[1,0,0]；
B) external disturbance item β (t) β (t) meet β (t)≤M β (t)≤M, and wherein M is known normal number；
C) there are matrix E to make Γ=Λ E；
D) there is known normal number b so that | | g (t, x) | |≤b, wherein | | * | | it is euclideam norm.
Further, the step S2 specifically includes following steps：
S201 contains the System State Model design sliding-mode surface s for assembling indeterminate according to described；
S202 designs sliding formwork voltage controller u according to the sliding-mode surface s：
Wherein, D is the coefficient matrix of sliding-mode surface s, and sgn (*) is sign function,For indeterminate
Estimated value, M, b, k are known normal number.
Further, the sliding-mode surface s designed in the step S201 meets s=Dx, and matrix D makes DB be nonsingular matrix,
And matrix D meets λ (A-B (DB)-1DA) 0 ＜, λ (*) indicate to solve characteristic value.
Further, the estimated value of the indeterminateIt is expressed as：
Wherein, θiFor degree of membership,wiFor the membership function of fuzzy rule i, i=1, r, r are fuzzy
Regular sum.
Compared with prior art, the invention has the advantages that：
1) the present invention is based on STATCOM fast and accurately responding abilities, and STATCOM is participated in the adjusting of System Reactive Power, from
And the reliability of Operation of Electric Systems is improved, by Adaptive Fuzzy Sliding Mode Control so that STATCOM disclosure satisfy that the nothing of system
Work(demand, synchronous generator output is idle substantially zeroed, to ensure that the stability of system.
2) present invention uses Adaptive Fuzzy Sliding Mode Control, and compared with traditional PI D voltages control, sliding mode control strategy reduces
The reactive power of voltage fluctuation and diesel engine output, fully ensures that stability of power system.In a certain range, when load is disturbed
Dynamic to increase, the control of adaptive fuzzy sliding mode voltage has better control performance than PID control.
3) present invention is effective to learning algorithms, and the sliding mode controller of design can control voltage in isolated island
Can be that certain basis is established in the research of later voltage control aspect in the range of the permission of operation even smaller.
Description of the drawings
Fig. 1 is the windy bavin hybrid power system structure chart of isolated island；
Fig. 2 is isolated island wind bavin hybrid power system transmission function schematic diagram；
Fig. 3 is load or burden without work disturbance figure；
Fig. 4 is wind turbine output mechanical power disturbance figure；
Fig. 5 is system busbar voltage variety Δ U under nominal parameters；
Fig. 6 is the idle work variable quantity Δ Q of STATCOM under nominal parametersCOM；
Fig. 7 is the idle work variable quantity Δ Q of synchronous generator under nominal parametersSG；
Fig. 8 is the idle work variable quantity Δ Q of influence generator under nominal parametersIG；
System busbar voltage variety Δ U when Fig. 9 is parameter lower bound；
The idle work variable quantity Δ Q of STATCOM when Figure 10 is parameter lower boundCOM；
The idle work variable quantity Δ Q of synchronous generator when Figure 11 is parameter lower boundSG；
The idle work variable quantity Δ Q of influence generator when Figure 12 is parameter lower boundIG；
System busbar voltage variety Δ U when Figure 13 is the parameter upper bound；
The idle work variable quantity Δ Q of STATCOM when Figure 14 is the parameter upper boundCOM；
The idle work variable quantity Δ Q of synchronous generator when Figure 15 is the parameter upper boundSG；
The idle work variable quantity Δ Q of influence generator when Figure 16 is the parameter upper boundIG。
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
For the windy bavin hybrid power system of isolated island as shown in Figure 1, it is caused by wind energy fluctuation to reduce
System voltage fluctuation, the present invention is proposed by using Adaptive Fuzzy Sliding Mode Control, to reduce voltage fluctuation.The present invention contains isolated island
Windy bavin hybrid power system voltage control method includes the following steps：
S1 establishes the windy bavin hybrid power system of isolated island, and establishes the mathematical model of each section in system, and system includes bavin
Fry dried food ingredients motor, wind-driven generator and STATCOM (Static Synchronous Compensator, static synchronous compensator),
The wherein mathematical model of STATCOM is：
In formula, KP、KIIt is the gain of Reactive-power control device；α is the specified Trigger Angles of IGBT；TdIt is the average dead times the IGBT time；Tα
For the IGBT trigger delay times；Δ α is the variable quantity of IGBT Trigger Angles；U is the output of STATCOM voltage controllers；β=Δ
UrefΔ U is disturbance quantity；Δα1、Δα2For intermediate quantity.
S2 establishes the state model containing indeterminate and containing assembly indeterminate according to the mathematical model of STATCOM
State model.
S3 designs sliding-mode surface s according to the state model for assembling indeterminate is contained.
S4, according to sliding-mode surface s design sliding formwork voltage controllers u.
S5, the controller u obtained according to step S5 optimize the voltage deviation of electric system as control instruction.
The windy bavin hybrid power system of isolated island of the present invention is embodied in traditional STATCOM models, the influence generator mould of Fig. 2
Type, synchro generator model, in excitation system model.In traditional STATCOM models,For phase delay link,
For IGBT trigger delay links.
In the present invention, STATCOM takes part in the adjusting of System Reactive Power, to improve the reliability of Operation of Electric Systems, leads to
The reactive requirement that Adaptive Fuzzy Sliding Mode Control makes STATCOM disclosure satisfy that system is crossed, it is basic that synchronous generator output is idle
It is zero, to ensure that the stability of system.
(1) mathematical model of the windy bavin electric system of isolated island
Include mainly diesel-driven generator, wind-driven generator and STATCOM in the windy bavin electric system of isolated island.In order to design packet
The dispersion sliding mode controller of hybrid power system is interconnected containing the multiple domain time lag of thermal power generation and energy storage, state mould is established in each region
Type meets：
With the continuous change of power system load, it is necessary to be adjusted to the method for operation of system.In different operations
Under mode, the parameter of system is different.Accordingly, it is considered to which to the uncertainty of parameters of electric power system, electric system is expressed as not knowing
The model of item：
Wherein, x (t) is state variable, and u (t) variables in order to control are the output of STATCOM voltage controllers, and β (t) is outer
Portion's distracter, y (t) are output variable, and A is sytem matrix, and B is input matrix, and C is output matrix, and F is disturbance term coefficient square
Battle array, Δ A, Δ F are the indeterminates of wind bavin parameters of electric power system corresponding with A, F respectively；
State variable is x (t)：
X (t)=[Δ α (t) Δs α1(t) Δα2(t)]T (6)
Define assembly indeterminate simultaneously
G (t, x)=Δ Ax (t) (7)
Γ β (t)=(F+ Δ F) β (t) (8)
(2) design principle of the STATCOM controls of the windy bavin hybrid power system of the invention containing isolated island
In order to facilitate the design of sliding mode controller, using indeterminate is assembled, then containing the electric system for assembling indeterminate
It is expressed as：
Before designing controller, provide first it is assumed hereinafter that,
Assuming that 1：(A, B) controllably, (A, C) is considerable；
Assuming that 2：Exterior distracter β (t) meets β (t)≤M, and wherein M is known normal number；
Assuming that 3：Assuming that there are matrix E to make Γ=Λ E；
Assuming that 4：There are known normal number b so that | | g (t, x) | |≤b, wherein | | * | | it is euclideam norm.
Design sliding-mode surface s meets equation s=Dx, selection matrix D, and it is nonsingular matrix to make DB, and matrix D meets λ (A-B
(DB)-1DA) 0 ＜, λ (*) indicate to solve characteristic value.
The purpose of the present invention is to design a sliding formwork voltage controller for the windy bavin hybrid power system of isolated islandCome non-matching uncertain electric system of calming.The stabilization of sliding mode
The design of property and controller can be realized by following theorem 1 and theorem 2.
Theorem 1：If assuming, 2,3 and 4 set up, when system state variables meet conditionWhen,
Etching system (formula (9)) keeps stablizing on sliding-mode surface s=0 when then any.
It proves：Construct liapunov function
To V derivations and by equationSubstitution obtains
In formula：For Lyapunov EquationSolution.
For given positive definite matrixProve that equation is represented by
Therefore, when system state variables meetAndWhen,It sets up, that is, ensure that system exists
It is stable on sliding-mode surface s=0.
Variable-structure controller is designed using following Reaching Law：
In formula：K ＞ 0；Sgn () indicates sign function；For the estimated value of indeterminate；To improve under different parameters
Controller robustness, design adaptive law areθ is degree of membership,Wi is (i=1, r) fuzzy rule
The then membership function of i.
Design fuzzy controller, take switching function s andFor input, it is output with the relevant index ξ of system chatter, obscures
The principle of controller is：When s is far from sliding-mode surface, andTherefore larger ξ is needed to generate sliding formwork condition；S is on sliding-mode surface
When, andTherefore smaller ξ is needed, as follows to design fuzzy rule, definition outputs and inputs fuzzy set：To s and
Five fuzzy sets are defined, 7 fuzzy sets are defined to θ, respectively：S={ NB, NS, ZR, PS, PB },θ
={ NB, NM, NS, ZR, PS, PM, PB }；Fuzzy rule is as shown in table 1.
1 fuzzy reasoning table of table
Theorem 2：If the adaptive fuzzy sliding mode controller of design meets equation
In formula：B, M and Γ is satisfied by assumed condition, then system meets reaching condition.
It proves：Construct liapunov function, enableThen to V1Derivation can obtain
Abbreviation obtains：
Then
I.e. system meets reaching condition, and designed controller can be such that system is maintained near sliding mode.
(3) sample calculation analysis
To verify have effective control action of the designed sliding mode controller to uncertain parameters systems, the present embodiment is logical
Following three simulation examples are crossed to be researched and analysed.STATCOM model parameters value and off-line range is as shown in table 2 thereon.
The variation range of 2 STATCOM model parameters of table
1) example 1
This example research system is run under STATCOM nominal parameters, considers shadow of the different load disturbance to electric system
It rings.Two kinds of disturbances are as shown in Figure 3 and Figure 4, respectively load or burden without work disturbance and the disturbance of wind turbine mechanical output.When load or burden without work is disturbed
When the disturbance of dynamic and wind turbine mechanical output, systematic parameter are identical, voltage fluctuation is as shown in Figure 5.System when STATCOM is uncontrolled
The recovery time of voltage deviation is longer, and PI is obviously shortened its recovery time when controlling；And the additional sliding formwork control proposed is further
Reduce overshoot and the recovery time of voltage deviation, therefore the stability of system voltage can be provided.
The reactive power fluctuation of STATCOM outputs and the reactive power fluctuation difference of SG outputs are as shown in Figure 6,7, and load or burden without work increases suddenly
Added-time, provided simultaneously by SG and STATCOM when beginning idle, when stable state is provided all idle by STATCOM；Not plus control
STATCOM is provided idle less, cannot be satisfied the reactive requirement of system, therefore SG can be issued additional and a part of idle be met system
It is required that so that voltage variety is in steady-state value；And STATCOM use PI and sliding formwork control when, be adjusted STATCOM increase
It sends out idle, and SG is coordinated to provide enough idle to system.It is controlled relative to PI, the SG's and STATCOM when sliding formwork control is super
Tune amount smaller, stabilization time are shorter.
The idle deviation of IG is as shown in figure 8, when STATCOM uncontrolled, and the idle work variable quantity that IG is absorbed is with wind turbine
The increase of input power disturbance and increase, using PI controls and when additional sliding formwork control, the idle work variable quantity absorbed increases, and protects
Demonstrate,prove its stable operation；It is controlled compared to PI, adds overshoot smaller when sliding formwork control, stablized faster.
2) example 2
This example research system is run under STATCOM parameter lower bounds, considers shadow of the different load disturbance to electric system
It rings.Two kinds of disturbances are as shown in Figure 3 and Figure 4, respectively load or burden without work disturbance and the disturbance of wind turbine mechanical output.When load or burden without work is disturbed
When the disturbance of dynamic and wind turbine mechanical output, systematic parameter are identical, voltage fluctuation is as shown in Figure 9.System when STATCOM is uncontrolled
The recovery time of voltage deviation is longer, and PI is obviously shortened its recovery time when controlling；And the additional sliding formwork control proposed is further
Reduce overshoot and the recovery time of voltage deviation, therefore the stability of system voltage can be provided.
For the reactive power fluctuation that the reactive power fluctuation and SG of STATCOM outputs export respectively as shown in Figure 10,11, load or burden without work is unexpected
There is provided simultaneously by SG and STATCOM idle when increase, when beginning, when stable state is provided all idle by STATCOM；Not plus control
STATCOM is provided idle less, cannot be satisfied the reactive requirement of system, therefore SG can be issued additional and a part of idle be met system
It is required that so that voltage variety is in steady-state value；And STATCOM use PI and sliding formwork control when, be adjusted STATCOM increase
It sends out idle, and SG is coordinated to provide enough idle to system.It is controlled relative to PI, the SG's and STATCOM when sliding formwork control is super
Tune amount smaller, stabilization time are shorter.
The idle deviation of IG is as shown in figure 12, and when STATCOM is uncontrolled, the idle work variable quantity that IG is absorbed is with wind turbine
The increase of input power disturbance and increase, using PI controls and when additional sliding formwork control, the idle work variable quantity absorbed increases, and protects
Demonstrate,prove its stable operation；It is controlled compared to PI, adds overshoot smaller when sliding formwork control, stablized faster.
3) example 3
This example research system is run under the STATCOM parameters upper bound, considers shadow of the different load disturbance to electric system
It rings.Two kinds of disturbances are as shown in Figure 3 and Figure 4, respectively load or burden without work disturbance and the disturbance of wind turbine mechanical output.When load or burden without work is disturbed
When the disturbance of dynamic and wind turbine mechanical output, systematic parameter are identical, voltage fluctuation is as shown in figure 13.It is when STATCOM is uncontrolled
The recovery time of system voltage deviation is longer, and PI is obviously shortened its recovery time when controlling；And the additional sliding formwork control proposed is into one
Step reduces overshoot and the recovery time of voltage deviation, therefore can provide the stability of system voltage.
For the reactive power fluctuation that the reactive power fluctuation and SG of STATCOM outputs export respectively as shown in Figure 14,15, load or burden without work is unexpected
There is provided simultaneously by SG and STATCOM idle when increase, when beginning, when stable state is provided all idle by STATCOM；Not plus control
STATCOM is provided idle less, cannot be satisfied the reactive requirement of system, therefore SG can be issued additional and a part of idle be met system
It is required that so that voltage variety is in steady-state value；And STATCOM use PI and sliding formwork control when, be adjusted STATCOM increase
It sends out idle, and SG is coordinated to provide enough idle to system.It is controlled relative to PI, the SG's and STATCOM when sliding formwork control is super
Tune amount smaller, stabilization time are shorter.
The idle deviation of IG is as shown in figure 16, and when STATCOM is uncontrolled, the idle work variable quantity that IG is absorbed is with wind turbine
The increase of input power disturbance and increase, using PI controls and when additional sliding formwork control, the idle work variable quantity absorbed increases, and protects
Demonstrate,prove its stable operation；It is controlled compared to PI, adds overshoot smaller when sliding formwork control, stablized faster.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (6)
1. a kind of STATCOM method of adaptive fuzzy sliding mode control of windy bavin system, which is characterized in that include the following steps：
S1 establishes the windy bavin hybrid power system of isolated island, and STATCOM participates in Reactive-power control in the electric system；
S2 designs sliding formwork voltage controller based on Adaptive Fuzzy Sliding Mode Control；
S3, the sliding formwork voltage controller to obtain optimize the voltage deviation of electric system as control instruction.
2. the STATCOM method of adaptive fuzzy sliding mode control of windy bavin system according to claim 1, feature exist
In in the step S1, considering the uncertainty of parameters of electric power system, establish the state mould of the windy bavin hybrid power system of isolated island
Type：
Wherein, x (t) is state variable, and variable, β (t) are external disturbance item to u (t) in order to control, and y (t) is output variable, and A is to be
It unites matrix, B is input matrix, and C is output matrix, and F is disturbance term coefficient matrix, and Δ A, Δ F are wind bavins corresponding with A, F respectively
The indeterminate of parameters of electric power system；
Indeterminate is assembled in definition：
G (t, x)=Δ Ax (t), Γ β (t)=(F+ Δ F) β (t)
It obtains containing the System State Model for assembling indeterminate：
3. the STATCOM method of adaptive fuzzy sliding mode control of windy bavin system according to claim 2, feature exist
In, the step S2 by it is assumed hereinafter that based on：
A) (A, B) controllably, (A, C) is considerable, Matrix C=[1,0,0]；
B) external disturbance item β (t) β (t) meet β (t)≤M β (t)≤M, and wherein M is known normal number；
C) there are matrix E to make Γ=Λ E；
D) there is known normal number b so that | | g (t, x) | |≤b, wherein | | * | | it is euclideam norm.
4. the STATCOM method of adaptive fuzzy sliding mode control of windy bavin system according to claim 2, feature exist
In the step S2 specifically includes following steps：
S201 contains the System State Model design sliding-mode surface s for assembling indeterminate according to described；
S202 designs sliding formwork voltage controller u according to the sliding-mode surface s：
Wherein, D is the coefficient matrix of sliding-mode surface s, and sgn (*) is sign function,For estimating for indeterminate
Evaluation, M, b, k are known normal number.
5. the STATCOM method of adaptive fuzzy sliding mode control of windy bavin system according to claim 4, feature exist
In the sliding-mode surface s designed in the step S201 meets s=Dx, and matrix D makes DB be nonsingular matrix, and matrix D meets λ (A-
B(DB)-1DA) 0 ＜, λ (*) indicate to solve characteristic value.
6. the STATCOM method of adaptive fuzzy sliding mode control of windy bavin system according to claim 4, feature exist
In the estimated value of the indeterminateIt is expressed as：
Wherein, θiFor degree of membership,wiFor the membership function of fuzzy rule i, i=1 ..., r, r is fuzzy rule sum.
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| CN110311426A (en) * | 2019-06-27 | 2019-10-08 | 上海电力学院 | The control method and device of small-sized isolated island wind bavin hybrid power system voltage and frequency |
| PL245231B1 (en) * | 2022-08-01 | 2024-06-03 | Akademia Morska W Szczecinie | Voltage control systems in a hybrid system with a permanent magnet synchronous generator (PMSG) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109802446A (en) * | 2019-01-08 | 2019-05-24 | 上海电力学院 | Wind bavin based on cloud model stores up hybrid power system electric voltage frequency sliding-mode control |
| CN110311426A (en) * | 2019-06-27 | 2019-10-08 | 上海电力学院 | The control method and device of small-sized isolated island wind bavin hybrid power system voltage and frequency |
| PL245231B1 (en) * | 2022-08-01 | 2024-06-03 | Akademia Morska W Szczecinie | Voltage control systems in a hybrid system with a permanent magnet synchronous generator (PMSG) |
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