Suppression method for fixed time sliding mode of ferromagnetic resonance overvoltage chaos

A fixed time, ferromagnetic resonance technology, applied in the field of electrical engineering, can solve the problems of no practical significance, complex methods, high energy consumption of control, etc., achieve strong robustness and anti-interference ability, improve stability, suppress excessive The effect of voltage

Inactive Publication Date: 2019-02-22
CHINA UNIV OF MINING & TECH
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Problems solved by technology

In the aspect of ferroresonant overvoltage suppression, constant pulse and chaos control methods based on maximum entropy neural network have also been proposed. has strong practical significance

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  • Suppression method for fixed time sliding mode of ferromagnetic resonance overvoltage chaos
  • Suppression method for fixed time sliding mode of ferromagnetic resonance overvoltage chaos
  • Suppression method for fixed time sliding mode of ferromagnetic resonance overvoltage chaos

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Embodiment Construction

[0055] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0056] Such as Figure 1 to Figure 7As shown, the method for quickly suppressing chaos of power system ferroresonance overvoltage provided by the present invention first establishes a mathematical model for the ferroresonance system, then designs the integral sliding mode surface according to the fixed time stability theory, and then derives the non- The linear control law and the adaptive law of uncertain parameters are designed and the controller is designed. 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. Finally, the control effect is verified by n...

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Abstract

The invention discloses a suppression method for a fixed time sliding mode of ferromagnetic resonance overvoltage chaos. The method includes the following steps: : (1) establishing a mathematical model of a ferromagnetic resonance system; (2) designing an integral sliding mode surface according to a fixed time stability theory; (3) obtaining a nonlinear control law and an adaptive law of uncertainparameters by theoretical derivation; (4) determining an upper bound of a stable time range according to related lemmas of the fixed time stability theory and Lyapunov function stability analysis; and (5) verifying a control effect by numerical simulation. The disclosed suppression method of a ferromagnetic resonance overvoltage can not only make the system stabilize in a finite time without depending on an initial value, but also enables the upper bound of the stabilization time to be obtained by calculation, has the characteristics of stronger robustness and interference resistance capability, can achieve global uniform asymptotic stability of the system within a predetermined time under any initial conditions, enables the ferromagnetic resonance overvoltage of an electric power systemto be more effectively suppressed, and enables the stability of the electric power system to be improved.

Description

technical field [0001] The invention belongs to the field of electrical engineering, in particular to a method for suppressing a fixed-time sliding mode of ferromagnetic resonance overvoltage chaos. Background technique [0002] There are many iron-core inductive components in the power system, such as transformers, voltage transformers, generators, arc suppression coils, reactors, etc.; there are also many capacitive components, such as the ground and phase-to-phase capacitance of the wires, compensation capacitors, and high-voltage equipment. They form a complex oscillating circuit. If there is a large disturbance or operation in the power system, it is possible to excite a long-lasting ferroresonant overvoltage in the oscillating circuit. [0003] At present, with a large number of power grid transformation and expansion projects in various places, the power grid structure is more complicated. Complex electrical systems also increase the chances of ferroresonance occurri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/00H02H9/04
CPCH02H9/007H02H9/045
Inventor 马草原张勇赵东艳刘伟韬刘鹏娟李志杰
Owner CHINA UNIV OF MINING & TECH
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