CN116191475A - Frequency modulation control method and device for wind power participation power system - Google Patents
Frequency modulation control method and device for wind power participation power system Download PDFInfo
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- 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
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention discloses a frequency modulation control method and device for a wind power participation power system, wherein the method comprises the following steps: acquiring initial state information of wind power participation in a power system; inputting the initial state information into a preset damping controller to output state information conforming to a preset damping ratio rule so as to ensure the stability of wind power participating in frequency modulation control of a power system, wherein the damping controller is based on H 2 ‑H ∞ And (5) designing and realizing a robust control algorithm. According to the invention, the wind power can be effectively inhibited from participating in low-frequency oscillation generated by the power system.
Description
Technical Field
The invention relates to the field of wind power generation systems, in particular to a frequency modulation control method and device for wind power participation power systems.
Background
With the rapid development of wind power generation, the duty ratio of wind power in a novel power system is continuously improved. When the fan is required to participate in the frequency modulation of the power system, an additional frequency response controller is required to realize the supporting function on the frequency of the power system. However, research has shown that the new additional frequency response controller introduces new low frequency oscillations when the wind turbine is connected to a weak grid. Therefore, there is a need to develop a robust (or Lu Bang) damping controller design method that can accommodate wind power uncertainty and provide support when wind power is involved in power system tuning.
At present, the application H is considered for a new low-frequency oscillation suppression method introduced by the fan participating in the frequency modulation of the power grid ∞ Robust control algorithm design, H ∞ The robust control algorithm is independent of the controlled object model, which can ensure robustness in the presence of uncertainty in the model.
However, the design only considers application H ∞ The robustness control algorithm ensures the robustness of the model when uncertainty exists, and the dynamic characteristic and the static characteristic of the system are ignored when external fault disturbance is uncertain, so that the fan is not effectively restrained from participating in new low-frequency oscillation introduced by grid frequency modulation.
Disclosure of Invention
The invention provides a frequency modulation control method and device for a wind power participation power system, which are used for solving at least one of the problems.
According to a first aspect of the invention, there is provided a frequency modulation control method for a wind power participation power system, the method comprising: acquiring initial state information of wind power participation in a power system; inputting the initial state information into a preset damping controller to output state information conforming to a preset damping ratio rule so as to ensure the robust stability of the wind power participation power system, wherein the damping controller is based on H 2 -H ∞ And (5) realizing a robust control algorithm.
Further, the damping controller is provided by: based on the H 2 -H ∞ A robust control algorithm constructs an initial damping controller according to the wind power participation power system; and inputting preset system external disturbance information and sample state information into the initial damping controller, and carrying out damping controller parameter solving operation on the initial damping controller based on preset configuration constraint so as to enable the output sample state information to accord with the preset damping ratio rule, thereby setting the damping controller.
Specifically, based on the H 2 -H ∞ Robust control algorithm, rootThe construction of the initial damping controller by the wind power participation power system comprises the following steps: based on the H 2 -H ∞ Robust control algorithm, constructing an initial damping controller according to the wind power participation power system, wherein the initial damping controller is based on H 2 Robust control algorithm to be used with the H 2 Setting the corresponding output closed loop transfer function norm of the robust control algorithm to be smaller than a first preset value; based on H ∞ Robust control algorithm to be used with the H ∞ The corresponding output closed loop transfer function norm of the robust control algorithm is set to be less than a second predetermined value.
Preferably, the predetermined configuration constraint is determined by: and determining the preset configuration constraint according to the minimum damping ratio of the wind power participating in the historical stable state of the power system.
According to a second aspect of the present invention, there is provided a frequency modulation control device for a wind power participation power system, the device comprising: the initial information acquisition unit is used for acquiring initial state information of the wind power participation power system; an oscillation suppression unit for inputting the initial state information to a preset damping controller to output state information conforming to a predetermined damping ratio rule, thereby ensuring robust stability of the wind power participation electric power system, wherein the damping controller is based on H 2 -H ∞ Robust control algorithm implementation
Further, the apparatus further comprises: and the damping controller setting unit is used for setting the damping controller. The damping controller setting unit includes: a model construction module for based on the H 2 -H ∞ A robust control algorithm constructs an initial damping controller according to the wind power participation power system; the model setting module is used for inputting preset system external disturbance information and sample state information into the initial damping controller, carrying out damping controller parameter solving operation on the initial damping controller based on preset configuration constraint so as to enable the output sample state information to accord with the preset damping ratio rule, and setting the damping controller.
The model construction module is specifically used for: based on the H 2 -H ∞ The robust control algorithm constructs the initial damping controller according to the wind power participation power system, wherein the initial damping controller is based on H 2 Robust control algorithm to be used with the H 2 Setting the corresponding output closed loop transfer function norm of the robust control algorithm to be smaller than a first preset value; based on H ∞ Robust control algorithm to be used with the H ∞ The corresponding output closed loop transfer function norm of the robust control algorithm is set to be less than a second predetermined value.
Preferably, the apparatus further comprises: and the predetermined configuration constraint determining unit is used for determining the predetermined configuration constraint according to the minimum damping ratio of the wind power participating in the historical stable state of the power system.
According to a third aspect of the invention, a wind power participation power system is provided, and the system comprises the frequency modulation control device of the wind power participation power system.
The invention also provides a computer device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method.
Meanwhile, the invention also provides a computer readable storage medium which stores a computer program for executing the method.
According to the technical scheme, the obtained initial state information of the wind power participation power system is input to the H-based system 2 -H ∞ The damping controller realized by the robust control algorithm can output state information conforming to a preset damping ratio rule, so that frequency modulation control can be performed on the wind power participation power system, and low-frequency oscillation of the wind power participation power system can be effectively restrained.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
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In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling frequency modulation of a wind power participation power system according to an embodiment of the invention;
FIG. 2 is an exemplary diagram of a wind power participation power system model in accordance with an embodiment of the present invention;
FIG. 3 is an exemplary diagram of configuration constraints according to an embodiment of the present invention;
fig. 4 is a block diagram of a frequency modulation control device of a wind power participation power system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In carrying out the present application, the applicant found the following related art:
the robust control is to design a controller which can ensure the stability of the system and meet the design performance index under the condition of considering modeling errors and external random interference. By adopting the robust control method, the designed controller has excellent performance in terms of uncertainty of a processing model and external random interference, and can ensure the performance in a wider working area.
At present, only application H is considered in the new oscillation suppression method introduced aiming at the fan participating in power grid frequency modulation ∞ Robust control algorithm that can only ensure robustness in the presence of model uncertainty, but is based on H 2 The robust control method can effectively control the transient process.
In view of the current participation in grid regulation for fansThe new low-frequency oscillation suppression method introduced by frequency only applies H ∞ The robust control algorithm ignores the dynamic characteristics and the static characteristics (which can be called transient processes) of the system when external fault disturbance is uncertain, so that the fan cannot be effectively restrained from participating in new low-frequency oscillation introduced by the power grid. Based on the frequency modulation control scheme, the embodiment of the invention provides a frequency modulation control scheme for a wind power participation power system, and the scheme is combined with H 2 -H ∞ The robust control algorithm can effectively inhibit low-frequency oscillation caused by participation of the fan in the power grid.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a flowchart of a frequency modulation control method of a wind power participation power system according to an embodiment of the invention, as shown in FIG. 1, the method includes:
102, inputting the initial state information to a preset damping controller to output state information conforming to a preset damping ratio rule, so as to perform frequency modulation control on the wind power participation power system and ensure the robust stability of the wind power participation power system, wherein the damping controller is based on H 2 -H ∞ And (5) realizing a robust control algorithm.
In one embodiment, the damping controller described above may be provided by the following steps (1) - (2):
(1) Based on the H 2 -H ∞ And (3) a robust control algorithm, and constructing an initial damping controller according to the wind power participation power system. Wherein based on H 2 Robust control algorithm to be used with the H 2 Setting the corresponding output closed loop transfer function norm of the robust control algorithm to be smaller than a first preset value; based on H ∞ Robust control algorithm to be combined with H ∞ The corresponding output closed loop transfer function norm of the robust control algorithm is set to be less than a second predetermined value.
In the concrete implementation, H 2 The robust control algorithm can effectively control the transient process, H ∞ The robust control algorithm may ensure robustness in the presence of uncertainty in the model.
(2) And inputting preset system external disturbance information and sample state information into the initial damping controller, and carrying out damping controller parameter solving operation on the initial damping controller based on preset configuration constraint so as to enable the output sample state information to accord with the preset damping ratio rule, thereby setting the damping controller.
The predetermined configuration constraints herein may be determined from a minimum damping ratio of the wind power participation in a historical steady state of the power system.
By inputting the acquired initial state information of the wind power participation power system to the H-based system 2 -H ∞ The damping controller realized by the robust control algorithm can output state information conforming to a preset damping ratio rule, so that frequency modulation control can be performed on the wind power participation power system, and low-frequency oscillation of the wind power participation power system can be effectively restrained.
In the specific implementation process, as wind power is integrated into a power system in a large scale and gradually replaces a traditional synchronous generator, an inertia constant for supporting the system frequency is reduced, and a power grid operator puts forward new requirements for the participation of wind power in the power system. The fan participates in the frequency modulation of the power system and needs an additional frequency response controller, and in the scene of a weak power grid, the additional frequency response controller can introduce a new low-frequency oscillation mode, so that hidden danger is brought to the safe and stable operation of the system. Because of the uncertainty of wind power generation and the uncertainty of a power system model, the embodiment of the invention provides a wind power generation system based on H 2 -H ∞ The damping controller realized by the robust control algorithm can ensure the robust stability of wind power participating in the frequency modulation of the power system.
For a better understanding of the present invention, embodiments of the present invention are described in detail below in conjunction with the wind power system example shown in FIG. 2 and the configuration constraint example shown in FIG. 3, where W in FIG. 2 1 、W 2 Representation for output z 2 Weight function, W 3 Is aimed atOutput z ∞ G is a frequency modulation open-loop function of the wind power participation power system, d is disturbance input, y is system output, u is system input, and K is a damping controller to be designed.
The damping controller of the embodiment of the invention can realize the following control targets:
1)H ∞ robust control algorithm performance is achieved by controlling the H defined from input d ∞ Output Z ∞ Closed loop transfer function H ∞ Norms less than a given upper bound normal number gamma 0 (i.e., the second predetermined value described above, which may be dependent on the actual operating conditions, the invention is not limited in this regard) so that the closed loop system has robust stability in view of model uncertainty due to d. Referring to FIG. 2, the closed loop system herein refers to the system input d and Z obtained by considering the damping controller K ∞ Is the transfer function of the system output.
2)H 2 Robust control algorithm performance is achieved by controlling the H defined from input d 2 Output Z 2 Closed loop transfer function H 2 The norm being smaller than a given upper-bound normal number v 0 (i.e., the first predetermined value described above) such that the closed loop system is robust in terms of dynamic and static characteristics in the presence of uncertain external fault disturbances. Referring to FIG. 2, the closed loop function herein refers to taking into account the damping controller K, to obtain Z with d as input 2 Is the transfer function of the output.
3) Referring to fig. 3, by controlling the pole position of the closed loop system within the defined region D (i.e., shaded region D, pole placement region), the oscillation damping ratio of the system is achieved to meet the given damping ratio minimum requirement, ensuring the dynamic and static stability of the system, so that the designed damping controller has robust low frequency oscillation damping characteristics.
In practice, first, an H-based is established 2 -H ∞ Controlling a state equation of the multi-input multi-output wind power grid-connected system:
in the above formula (1), x is a system state variable, including all state variables of the fan involved in the frequency modulation of the power system (for example, fan voltage, current, phase angle of synchronous generator in the power system, angular velocity, voltage, some intermediate variables of the control loop, etc.);
representing deriving x; u is an input variable and is active power for inhibiting low-frequency oscillation of the system when the fan is used for grid frequency modulation; d is the external disturbance input of the system; y is an output variable, and the frequency deviation of the grid-connected point of the fan is calculated; a represents a state matrix of the system.
In actual operation, the state equation is used to describe the relationship between the input and output matrices of the system, and is generally expressed as:
wherein, formula (a) is used for describing the relation between the first-order differential quantity of the state variable and the system input; the formula (b) is used for describing the relation between the system output and the state and the system input; the matrix A, B, C, D is a state matrix, an input matrix, an output matrix, and a direct transfer matrix of the system.
In the above formula (1), Z ∞ To measure H ∞ Output variable of control index, Z 2 To measure H 2 The output variable of the index is controlled,
wherein C is ∞ For describing H ∞ Control output Z ∞ A relationship with a state variable; c (C) 2 For describing H 2 Control output Z 2 A relationship with a state variable; c (C) y For describing the relationship between the system output y and the state variable. Similarly, D ∞1 For describing H ∞ Control output Z ∞ A relationship with an external disturbance input d; d (D) ∞2 For describing H ∞ Control output Z ∞ A relationship with the system input u; d (D) 21 For describing H 2 Control output Z 2 A relationship with an external disturbance input d; d (D) 22 For describing H 2 Control output Z 2 A relationship with the system input u; d (D) y For describing the relation between the system output y and the external disturbance input d. Therefore, the last three formulas in the formula (1) are written as general expressions:
secondly, a damping controller K is designed, and the state equation is as follows:
wherein k of the subscript represents a variable corresponding to the damping controller; thus, x k Is a model state variable; a is that k 、B k 、C k 、D k Is a state matrix, an input matrix, an output matrix and a direct transfer matrix of the model.
The closed loop system can be expressed as:
wherein,,
z ∞ ＝C cl∞ x cl +D cl∞ dz 2 ＝C cl2 x cl +D cl2 d，A cl 、B cl 、C cl 、D cl the state matrix, the input matrix, the output matrix and the direct transfer matrix of the closed-loop system (similar to the above formula (1) and formula (2), except that the state variables of the closed-loop system include the state variables of the formula (1) and the formula (2)), and the expressions thereof can be represented by the following formulas (4) - (7):
it should be noted that, the above equation (3) is a method in which the damping controller K designed by the equation (2) is substituted into the open loop system equation (1). The cl subscripts indicate that these variables are variables used to describe the closed loop system. Equation (3) is used to describe the relationship between the input and output of the overall closed loop system after designing the damping controller K.
If positive definite matrix P is present ∞ So that the matrix inequality (8) is established, H can be ensured ∞ The control index is satisfied;
wherein I is an identity matrix, gamma 0 For a given upper bound positive constant, we describe a pair H ∞ Requirements for performance index.
For H 2 Index, if positive definite matrix P is present 2 And Q, so that the following matrix inequalities (9) - (11) hold, H can be surely realized 2 Control indexes:
in the formula, v 0 For a given positive constant, we describe the pair H 2 Requirements for performance index. P (P) 2 And Q has no relation to the variables in the system, only that these two variables are assumed here for solution. Provided that there is P 2 And Q is such that the inequality of formulas (9) - (11) is satisfied, H can be satisfied 2 And (5) controlling the index.
By setting the pole allocation region of the closed-loop system shown in fig. 3, the damping ratio of the newly introduced oscillation of the frequency response controller after the additional damping controller K can be ensured, and the participation of the fan in the frequency modulation stability of the system can be ensured. And selecting an internal angle 2 theta, and taking a conical curve symmetrical with a horizontal axis as a feasible pole position. The internal angle of the conic section can be calculated from the minimum damping ratio of the mode to ensure the stability of the system, and the calculation formula can be referred to as the following formula (12):
it should be noted that, referring to fig. 2, in a closed loop system (shown in a square frame in the figure) based on the damping controller K, a state equation of the system is obtained, the analysis state matrix a calculates feature roots (which can be implemented according to matlab operation codes (eig (a)), and all feature roots of the system, that is, poles, need to be in a shadow area of fig. 3, that is, a defined area D.
Subsequently, the matrix inequalities (8) - (11) and the following inequality (13) are solved so that the positive definite matrix P in the formula ∞ 、P 2 、P D Satisfy formula (14):
P＝P ∞ ＝P 2 ＝P D ＞0 (14)
in one embodiment, the inequality solving problem can be applied to an LMI (Linear Matrix Inequality ) solving tool box in Matlab software to obtain the designed damping controller K state equation parameter A k 、B k 、C k 、D k 。
Specifically, the step of calculating the state equation parameters using Matlab LMI solution toolbox is as follows:
(1) Linearizing the wind power participation power system model according to the selected input and output to obtain a system matrix A, B, C, D;
(2) Based on a Schur method, model order reduction is carried out, and an order reduction model with the same Hankel singular value as the original model is selected in the research of low-frequency oscillation bandwidth;
(3) Taking H with constraint of regional pole allocation 2 -H ∞ The damping controller is designed to solve a function 'hinfmix' for model design. Wherein the input pole allocation constraint is defined according to 'lmireg', and the solution output obtains H meeting the constraint 2 -H ∞ A damping controller.
Aiming at the novel power system operation scene of wind power participating in grid frequency modulation, the embodiment of the invention provides a method based on H 2 -H ∞ A robust low frequency oscillation controller (i.e., the damping controller described above). The robust controller designed by the method can effectively inhibit the problem of low-frequency oscillation caused by wind power participating in a power grid, and can ensure uncertainty of a system model and robustness of system transient response. The controller design method provided by the embodiment of the invention can be widely applied to large-scale wind power grid connection to participate in a power grid, can ensure the robust stability of the system, and is beneficial to the safe and stable access of new energy into the power system.
Based on similar inventive concepts, the embodiment of the invention also provides a wind power participation power system, which comprises: and the frequency modulation control device is used for performing frequency modulation control on the wind power participation power system. Preferably, the device can realize the flow of the frequency modulation control method of the wind power participation power system.
Fig. 4 is a block diagram of the frequency modulation control apparatus, as shown in fig. 4, comprising: an initial information acquisition unit 1 and an oscillation suppression unit 2, wherein:
the initial information acquisition unit 1 is used for acquiring initial state information of the wind power participation power system;
an oscillation suppression unit 2 for inputting the initial state information to a preset damping controller to output state information conforming to a predetermined damping ratio rule, thereby ensuring robust stability of the wind power participation electric power system, wherein the damping controller is based on H 2 -H ∞ And (5) realizing a robust control algorithm.
The initial state information of the wind power participation power system acquired by the initial information acquisition unit 1 is input to the H-based power system through the oscillation suppression unit 2 2 -H ∞ The damping controller realized by the robust control algorithm can output state information conforming to a preset damping ratio rule, so that frequency modulation control can be performed on the wind power participation power system, and low-frequency oscillation of the wind power system can be effectively restrained.
In one embodiment, the apparatus further comprises: and the damping controller setting unit is used for setting the damping controller.
Specifically, the damping controller setting unit includes: a model construction module and a model setting module, wherein:
a model construction module for based on the H 2 -H ∞ And (3) a robust control algorithm, and constructing an initial damping controller according to the wind power participation power system. Wherein based on H 2 Robust control algorithm to be used with the H 2 Setting the corresponding output closed loop transfer function norm of the robust control algorithm to be smaller than a first preset value; based on H ∞ Robust control algorithm to be used with the H ∞ Robust controlThe corresponding output closed loop transfer function norm of the algorithm is set to be less than a second predetermined value.
The model setting module is used for inputting preset system external disturbance information and sample state information into the initial damping controller, carrying out damping controller parameter solving operation on the initial damping controller based on preset configuration constraint so as to enable the output sample state information to accord with the preset damping ratio rule, and setting the damping controller.
In one embodiment, the apparatus further comprises: and the predetermined configuration constraint determining unit is used for determining the required predetermined configuration constraint according to the minimum damping ratio of the wind power participating in the historical stable state of the power system.
The specific execution process of each unit and each module may be referred to the description in the above method embodiment, and will not be repeated here.
In actual operation, the units and the modules may be combined or may be singly arranged, and the present invention is not limited thereto.
The present embodiment also provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor. The electronic device may be a desktop computer, a tablet computer, a mobile terminal, etc., and the embodiment is not limited thereto. In this embodiment, the electronic device may be implemented by referring to the above method embodiment and the embodiment of the frequency modulation control device of the wind power participation power system, and the content thereof is incorporated herein, and the repetition is not repeated.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, is used for realizing the steps of the frequency modulation control method for the wind power participation power system.
In summary, the invention provides a hybrid H-based method for establishing a novel power system operation scene of wind power participating in grid frequency modulation 2 -H ∞ The robust controller designed by the robust low-frequency oscillation scheme can effectively inhibit low frequency caused by wind power participating in grid frequency modulationThe problem of frequency oscillation can ensure uncertainty of a system model and robustness of a system transient response. The embodiment of the invention provides a mixed H-based method 2 -H ∞ The controller design method of the system can be widely applied to large-scale wind power grid connection to participate in the power grid, ensures the robust stability of the system, and is beneficial to the safe and stable access of new energy into the power system.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. A frequency modulation control method for a wind power participation power system, the method comprising:
acquiring initial state information of wind power participation in a power system;
inputting the initial state information into a preset damping controller to output state information conforming to a preset damping ratio rule so as to ensure the robust stability of the wind power participation power system, wherein the damping controller is based on H 2 -H ∞ And (5) realizing a robust control algorithm.
2. The method of claim 1, wherein the damping controller is configured by:
based on the H 2 -H ∞ A robust control algorithm constructs an initial damping controller according to the wind power participation power system;
and inputting preset system external disturbance information and sample state information into the initial damping controller, and carrying out damping controller parameter solving operation on the initial damping controller based on preset configuration constraint so as to enable the output sample state information to accord with the preset damping ratio rule, thereby setting the damping controller.
3. The method of claim 2, wherein based on the H 2 -H ∞ The robust control algorithm for constructing an initial damping controller according to the wind power participation power system comprises the following steps:
based on the H 2 -H ∞ A robust control algorithm, constructing the initial damping controller according to the wind power participation power system, wherein,
based on H 2 Robust control algorithm to be used with the H 2 Setting the corresponding output closed loop transfer function norm of the robust control algorithm to be smaller than a first preset value;
based on H ∞ Robust control algorithm to be used with the H ∞ The corresponding output closed loop transfer function norm of the robust control algorithm is set to be less than a second predetermined value.
4. The method of claim 2, wherein the predetermined configuration constraint is determined by:
and determining the preset configuration constraint according to the minimum damping ratio of the wind power participating in the historical stable state of the power system.
5. A frequency modulation control device for a wind power participation power system, the device comprising:
the initial information acquisition unit is used for acquiring initial state information of the wind power participation power system;
an oscillation suppression unit for inputting the initial state information to a preset damping controller to output state information conforming to a predetermined damping ratio rule, thereby ensuring robust stability of the wind power participation electric power system, wherein the damping controller is based on H 2 -H ∞ And (5) realizing a robust control algorithm.
6. The apparatus of claim 5, wherein the apparatus further comprises: a damping controller setting unit for setting the damping controller,
the damping controller setting unit includes:
a model construction module for based on the H 2 -H ∞ A robust control algorithm constructs an initial damping controller according to the wind power participation power system;
the model setting module is used for inputting preset system external disturbance information and sample state information into the initial damping controller, carrying out damping controller parameter solving operation on the initial damping controller based on preset configuration constraint so as to enable the output sample state information to accord with the preset damping ratio rule, and setting the damping controller.
7. The apparatus of claim 6, wherein the model building module is specifically configured to:
based on the H 2 -H ∞ A robust control algorithm, constructing the initial damping controller according to the wind power participation power system, wherein,
based on H 2 Robust control algorithm to be used with the H 2 Setting the corresponding output closed loop transfer function norm of the robust control algorithm to be smaller than a first preset value;
based on H ∞ Robust control algorithm to be used with the H ∞ The corresponding output closed loop transfer function norm of the robust control algorithm is set to be less than a second predetermined value.
8. The apparatus of claim 6, wherein the apparatus further comprises:
and the predetermined configuration constraint determining unit is used for determining the predetermined configuration constraint according to the minimum damping ratio of the wind power participating in the historical stable state of the power system.
9. A wind power participation power system, characterized in that the system comprises a frequency modulation control device of a wind power participation power system according to any of claims 5-8.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of claims 1 to 4 when the computer program is executed by the processor.
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