Unlock instant, AI-driven research and patent intelligence for your innovation.

An Extended Method of Stable Domain of Controller Parameters for Sub/Supersynchronous Oscillation Prevention and Control

An extension method and a technology of stable domain, which is applied in the field of controller parameter stable domain expansion, can solve problems that are difficult to meet online engineering applications, and achieve the effects of reducing conservatism, accurate estimation, and wide range

Active Publication Date: 2022-06-07
WUHAN UNIV +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the parameter stability domain constructed by this method is inverted based on the sufficient condition of the stability of the small disturbance of the system. It has high construction efficiency and inevitably has a large degree of conservatism, and it is also difficult to meet the needs of online engineering applications.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An Extended Method of Stable Domain of Controller Parameters for Sub/Supersynchronous Oscillation Prevention and Control
  • An Extended Method of Stable Domain of Controller Parameters for Sub/Supersynchronous Oscillation Prevention and Control
  • An Extended Method of Stable Domain of Controller Parameters for Sub/Supersynchronous Oscillation Prevention and Control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] The technical solutions of the present invention will be described in detail below according to the embodiments and in conjunction with the accompanying drawings.

[0066] First, the method principle of the present invention is introduced. The present invention includes a controller parameter stability domain expansion method applied to sub / super-synchronous oscillation, which specifically includes the following steps:

[0067] Step 1, according to the basic disk theorem, estimate the distribution range of the eigenvalues ​​of the state matrix A of the system including the controller parameters.

[0068] With a state matrix A:

[0069] A=(a ij ) n×n (1)

[0070] The circular domain on the complex plane is called:

[0071] G i ={z||z-a ii |≤R i ,z∈C} (i=1,2,…,n) (2)

[0072] where R i for:

[0073]

[0074] Among them, G i is the ith Gerschgorin disk of matrix A, abbreviated as the Gerschgorin disk. Gale Disc G i The center of the circle is the diagonal ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention specifically relates to a controller parameter stability region extension method for sub / supersynchronous oscillation prevention and control. The present invention creatively applies the extended disk theorem to the state matrix containing parameters of the new energy power system (the elements of which are The function of the dominant controller parameters), according to the stability margin evaluation index, an optimization model of the similar transformation matrix is ​​proposed, which can narrow the range of eigenvalue estimation after solving, and further invert the extended controller parameters according to the Lyapunov stability criterion as an inverse problem Stable domain, to reduce the conservatism of the stable domain of controller parameters. The controller parameter stability region expansion method has the characteristics of high computational efficiency and less conservativeness, and is suitable for online engineering applications. The invention is combined with engineering practice, and can be adapted to rational selection and online refresh of control parameters of power electronic converters under the background of a large number of new energy power stations being fed into the power grid.

Description

technical field [0001] The invention relates to a method for expanding the stability domain of controller parameters based on the expanded disk theorem for the prevention and control of sub / super synchronous oscillation. Background technique [0002] With the rapid development of smart grid, large-scale new energy power generation stations are connected to the grid and a large number of power electronic equipment are applied in the grid, the sub-supersynchronous oscillation problem caused by sub-synchronous control interaction (SSCI) seriously affects the security and stability of the power system. run. The influence mechanism of different controller parameters on the system oscillation mode has been studied and analyzed, and it is found that there is a damping coupling phenomenon between the oscillation modes. It is necessary to optimize the parameters or establish a parameter stability domain to evaluate the rationality of the controller parameter combination. [0003] E...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 林涛李水天柯松盛逸标陈汝斯杜蕙李轻言
Owner WUHAN UNIV