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Fast Suppression Method of Chaotic Oscillation in Two-machine Interconnected Power System

A power system, fast technology, applied in the direction of reducing/preventing power oscillation, circuit devices, AC network circuits, etc., can solve problems such as difficulty in obtaining accurate parameters, and achieve improved voltage stability, strong robustness and anti-interference ability. , the effect of suppressing chaotic oscillation

Active Publication Date: 2020-05-01
CHINA UNIV OF MINING & TECH +1
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  • Application Information

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Problems solved by technology

These two control methods can make the system stable in a finite time, but they are also limited by the limitation of finite time stability. The system stability is affected by the initial conditions of the system, and the initial conditions of the system are generally difficult to obtain accurate parameters in power systems.

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  • Fast Suppression Method of Chaotic Oscillation in Two-machine Interconnected Power System
  • Fast Suppression Method of Chaotic Oscillation in Two-machine Interconnected Power System
  • Fast Suppression Method of Chaotic Oscillation in Two-machine Interconnected Power System

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the embodiments provided by the present invention are not intended to limit the invention.

[0062] The method for quickly suppressing the chaotic oscillation of the dual-machine interconnected power system of the present invention first carries out a mathematical model on the dual-machine interconnected power system, and then designs the fast Terminal sliding mode surface and the adaptive law of uncertain parameters according to the fixed time stability theory, and then passes The nonlinear control law is derived theoretically and the controller is designed, and the upper bound of the stable time range is determined according to the relevant lemmas of the fixed-time stability theory and the stability analysis of the Lyapunov function, and finally the control effect is verified by numerical simulation;

[0063] Such as Figure 6 As shown, the specific...

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Abstract

The invention provides a fast suppression method of chaotic oscillation of a two-machine interconnected power system, which is suitable for the field of electrical engineering. According to the theoryof fixed time stability, combined with the traditional adaptive control and fast Terminal sliding mode control, a nonlinear controller is designed to make the control variable reach the neighborhoodwith arbitrarily small reference value in finite time, and the asymptotic stability of global fixed time at the equilibrium point is realized. It can stabilize the system in finite time without relying on the initial value. The stability time range can be guaranteed to have an upper bound, and the upper bound of the stability time can be calculated by the method provided by the invention; The method has strong robustness and anti-jamming ability. Under any initial conditions, the system can achieve global uniform asymptotic stability in a predetermined time, more effectively suppress the chaotic oscillation in the power system, and improve the stability of the power system.

Description

technical field [0001] The invention relates to a fast suppressing method, which is especially suitable for fast suppressing the chaotic oscillation of a double-machine interconnected power system used in the field of electrical engineering. Background technique [0002] Power system, as a typical multi-variable strongly coupled nonlinear system, exhibits a large number of nonlinear dynamic behaviors during operation, such as low-frequency oscillation, bifurcation and chaos. Especially when subjected to external disturbances, as long as the disturbance amplitude meets certain conditions, the power system will experience continuous irregular chaotic oscillations, which may lead to system instability, voltage collapse, and large-scale power outages. Therefore, it is very necessary to study the suppression method of power system chaos. The dual-machine interconnection power system is a system in which two independent power systems with generators are connected through tie line...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 马草原王法鑫王健宇李志杰潘可欣张勇刘朋娟陈楚郑海广张人懿刘闯阵吴文贝成宇宙张雪姿
Owner CHINA UNIV OF MINING & TECH
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