Method for inhibiting chaotic oscillation of electric power system

Abstract

The invention discloses a method for inhibiting the chaotic oscillation of an electric power system, and specifically relates to the technical field of electrical engineering. The method comprises thefollowing steps: establishing a mathematical model of the second order electric power system, and when chaotic oscillation is generated for the electric power system, determining the value of each parameter in the electric power system; based on global sliding mode control, designing a global sliding mode controller, and inhibiting the chaotic oscillation of the electric power system; based on the global sliding mode controller, adding self-adaptive control, designing a self-adaptive global sliding mode controller, and estimating disturbance on the system through designed self-adaptive rate in the self-adaptive control, wherein the chaotic oscillation of the electric power system also can be successfully inhibited by the designed controller under the condition that the upper bound of disturbance of the system is unknown; adding the designed global sliding mode controller into the second order chaotic electric power system, and verifying the control effect of the self-adaptive global sliding mode controller through simulation.

Description

Technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a method for restraining chaotic oscillation of a power system. Background technique [0002] Chaos is a kind of random phenomenon produced in nonlinear systems, and power systems, as typical nonlinear systems, have complex chaotic behaviors. When chaotic behavior occurs in the power system, it will cause voltage instability and voltage collapse, which will seriously affect the safety and stable operation of the power system, and even cause large-scale blackouts, causing huge losses and serious losses to the national economy and people’s lives. harm. [0003] In order to suppress the chaotic oscillation phenomenon in the power system, scholars at home and abroad have carried out in-depth research on this and proposed many control methods. Currently, the commonly used control methods include parameter perturbation method, adaptive control method, periodic disturbance meth...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional sliding mode control needs to know the upper bound of the system disturbance, and proposes a method based on adaptive global sliding mode control to suppress the chaotic oscillation of the power system, which can prevent the occurrence of excessive controller input and output signals Or when the disturbance estimation value is less than zero, it can also make the parameter estimation process more stable and reduce chattering

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